import crypto from 'crypto'
import { z } from 'zod'
import { TRPCError } from '@trpc/server'
import { router, publicProcedure, protectedProcedure } from '../trpc'
import { getPresignedUrl, generateObjectKey } from '@/lib/minio'
import { sendStyledNotificationEmail, sendTeamMemberInviteEmail } from '@/lib/email'
import { logAudit } from '@/server/utils/audit'
import { createNotification } from '../services/in-app-notification'
import { checkRequirementsAndTransition } from '../services/round-engine'
import { EvaluationConfigSchema } from '@/types/competition-configs'
import type { Prisma } from '@prisma/client'

// Bucket for applicant submissions
export const SUBMISSIONS_BUCKET = 'mopc-submissions'
const TEAM_INVITE_TOKEN_EXPIRY_MS = 30 * 24 * 60 * 60 * 1000 // 30 days

function generateInviteToken(): string {
  return crypto.randomBytes(32).toString('hex')
}

export const applicantRouter = router({
  /**
   * Get submission info for an applicant (by round slug)
   */
  getSubmissionBySlug: publicProcedure
    .input(z.object({ slug: z.string() }))
    .query(async ({ ctx, input }) => {
      const round = await ctx.prisma.round.findFirst({
        where: { slug: input.slug },
        include: {
          competition: {
            include: {
              program: { select: { id: true, name: true, year: true, description: true } },
            },
          },
        },
      })

      if (!round) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Round not found',
        })
      }

      const now = new Date()
      const isOpen = round.status === 'ROUND_ACTIVE'

      return {
        stage: {
          id: round.id,
          name: round.name,
          slug: round.slug,
          windowCloseAt: null,
          isOpen,
        },
        program: round.competition.program,
      }
    }),

  /**
   * Get the current user's submission for a round (as submitter or team member)
   */
  getMySubmission: protectedProcedure
    .input(z.object({ roundId: z.string().optional(), programId: z.string().optional() }))
    .query(async ({ ctx, input }) => {
      // Only applicants can use this
      if (ctx.user.role !== 'APPLICANT') {
        throw new TRPCError({
          code: 'FORBIDDEN',
          message: 'Only applicants can access submissions',
        })
      }

      const where: Record<string, unknown> = {
        OR: [
          { submittedByUserId: ctx.user.id },
          {
            teamMembers: {
              some: { userId: ctx.user.id },
            },
          },
        ],
      }

      if (input.roundId) {
        where.roundAssignments = { some: { roundId: input.roundId } }
      }
      if (input.programId) {
        where.programId = input.programId
      }

      const project = await ctx.prisma.project.findFirst({
        where,
        include: {
          files: true,
          program: { select: { id: true, name: true, year: true } },
          teamMembers: {
            include: {
              user: {
                select: { id: true, name: true, email: true },
              },
            },
          },
        },
      })

      if (project) {
        const userMembership = project.teamMembers.find((tm) => tm.userId === ctx.user.id)
        return {
          ...project,
          userRole: userMembership?.role || (project.submittedByUserId === ctx.user.id ? 'LEAD' : null),
          isTeamLead: project.submittedByUserId === ctx.user.id || userMembership?.role === 'LEAD',
        }
      }

      return null
    }),

  /**
   * Create or update a submission (draft or submitted)
   */
  saveSubmission: protectedProcedure
    .input(
      z.object({
        programId: z.string().optional(),
        projectId: z.string().optional(),
        title: z.string().min(1).max(500),
        teamName: z.string().optional(),
        description: z.string().optional(),
        tags: z.array(z.string()).optional(),
        metadataJson: z.record(z.unknown()).optional(),
        submit: z.boolean().default(false),
      })
    )
    .mutation(async ({ ctx, input }) => {
      // Only applicants can use this
      if (ctx.user.role !== 'APPLICANT') {
        throw new TRPCError({
          code: 'FORBIDDEN',
          message: 'Only applicants can submit projects',
        })
      }

      const now = new Date()

      const { projectId, submit, programId, metadataJson, ...data } = input

      if (projectId) {
        // Update existing
        const existing = await ctx.prisma.project.findFirst({
          where: {
            id: projectId,
            submittedByUserId: ctx.user.id,
          },
        })

        if (!existing) {
          throw new TRPCError({
            code: 'NOT_FOUND',
            message: 'Project not found or you do not have access',
          })
        }

        // Can't update if already submitted
        if (existing.submittedAt && !submit) {
          throw new TRPCError({
            code: 'BAD_REQUEST',
            message: 'Cannot modify a submitted project',
          })
        }

        const project = await ctx.prisma.project.update({
          where: { id: projectId },
          data: {
            ...data,
            metadataJson: metadataJson as unknown ?? undefined,
            submittedAt: submit && !existing.submittedAt ? now : existing.submittedAt,
          },
        })

        // Update Project status if submitting
        if (submit) {
          await ctx.prisma.project.update({
            where: { id: projectId },
            data: { status: 'SUBMITTED' },
          })
        }

        return project
      } else {
        if (!programId) {
          throw new TRPCError({
            code: 'BAD_REQUEST',
            message: 'programId is required when creating a new submission',
          })
        }

        // Create new project
        const project = await ctx.prisma.project.create({
          data: {
            programId,
            ...data,
            metadataJson: metadataJson as unknown ?? undefined,
            submittedByUserId: ctx.user.id,
            submittedByEmail: ctx.user.email,
            submissionSource: 'MANUAL',
            submittedAt: submit ? now : null,
            status: 'SUBMITTED',
          },
        })

        // Audit log
        await logAudit({
          prisma: ctx.prisma,
          userId: ctx.user.id,
          action: 'CREATE',
          entityType: 'Project',
          entityId: project.id,
          detailsJson: { title: input.title, source: 'applicant_portal' },
          ipAddress: ctx.ip,
          userAgent: ctx.userAgent,
        })

        return project
      }
    }),

  /**
   * Get upload URL for a submission file
   */
  getUploadUrl: protectedProcedure
    .input(
      z.object({
        projectId: z.string(),
        fileName: z.string(),
        mimeType: z.string(),
        fileType: z.enum(['EXEC_SUMMARY', 'BUSINESS_PLAN', 'VIDEO_PITCH', 'PRESENTATION', 'SUPPORTING_DOC', 'OTHER']),
        roundId: z.string().optional(),
        requirementId: z.string().optional(),
      })
    )
    .mutation(async ({ ctx, input }) => {
      // Applicants or team members can upload
      if (ctx.user.role !== 'APPLICANT') {
        // Check if user is a team member of the project
        const teamMembership = await ctx.prisma.teamMember.findFirst({
          where: { projectId: input.projectId, userId: ctx.user.id },
          select: { id: true },
        })
        if (!teamMembership) {
          throw new TRPCError({
            code: 'FORBIDDEN',
            message: 'Only applicants or team members can upload files',
          })
        }
      }

      // Verify project access (owner or team member)
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            { teamMembers: { some: { userId: ctx.user.id } } },
          ],
        },
      })

      if (!project) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Project not found or you do not have access',
        })
      }

      // If uploading against a requirement, validate mime type and size
      if (input.requirementId) {
        const requirement = await ctx.prisma.fileRequirement.findUnique({
          where: { id: input.requirementId },
        })
        if (!requirement) {
          throw new TRPCError({ code: 'NOT_FOUND', message: 'File requirement not found' })
        }
        // Validate mime type
        if (requirement.acceptedMimeTypes.length > 0) {
          const accepted = requirement.acceptedMimeTypes.some((pattern) => {
            if (pattern.endsWith('/*')) {
              return input.mimeType.startsWith(pattern.replace('/*', '/'))
            }
            return input.mimeType === pattern
          })
          if (!accepted) {
            throw new TRPCError({
              code: 'BAD_REQUEST',
              message: `File type ${input.mimeType} is not accepted. Accepted types: ${requirement.acceptedMimeTypes.join(', ')}`,
            })
          }
        }
      }

      let isLate = false

      // Can't upload if already submitted
      if (project.submittedAt && !isLate) {
        throw new TRPCError({
          code: 'BAD_REQUEST',
          message: 'Cannot modify a submitted project',
        })
      }

      // Fetch round name for storage path (if uploading against a round)
      let roundName: string | undefined
      if (input.roundId) {
        const round = await ctx.prisma.round.findUnique({
          where: { id: input.roundId },
          select: { name: true },
        })
        roundName = round?.name
      }

      const objectKey = generateObjectKey(project.title, input.fileName, roundName)

      const url = await getPresignedUrl(SUBMISSIONS_BUCKET, objectKey, 'PUT', 3600)

      return {
        url,
        bucket: SUBMISSIONS_BUCKET,
        objectKey,
        isLate,
        roundId: input.roundId || null,
      }
    }),

  /**
   * Save file metadata after upload
   */
  saveFileMetadata: protectedProcedure
    .input(
      z.object({
        projectId: z.string(),
        fileName: z.string(),
        mimeType: z.string(),
        size: z.number().int(),
        fileType: z.enum(['EXEC_SUMMARY', 'BUSINESS_PLAN', 'VIDEO_PITCH', 'PRESENTATION', 'SUPPORTING_DOC', 'OTHER']),
        bucket: z.string(),
        objectKey: z.string(),
        roundId: z.string().optional(),
        isLate: z.boolean().optional(),
        requirementId: z.string().optional(),
      })
    )
    .mutation(async ({ ctx, input }) => {
      // Applicants or team members can save files
      if (ctx.user.role !== 'APPLICANT') {
        const teamMembership = await ctx.prisma.teamMember.findFirst({
          where: { projectId: input.projectId, userId: ctx.user.id },
          select: { id: true },
        })
        if (!teamMembership) {
          throw new TRPCError({
            code: 'FORBIDDEN',
            message: 'Only applicants or team members can save files',
          })
        }
      }

      // Verify project access
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            { teamMembers: { some: { userId: ctx.user.id } } },
          ],
        },
      })

      if (!project) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Project not found or you do not have access',
        })
      }

      const { projectId, roundId, isLate, requirementId, ...fileData } = input

      // Delete existing file: by requirementId if provided, otherwise by fileType
      if (requirementId) {
        await ctx.prisma.projectFile.deleteMany({
          where: {
            projectId,
            requirementId,
          },
        })
      } else {
        await ctx.prisma.projectFile.deleteMany({
          where: {
            projectId,
            fileType: input.fileType,
          },
        })
      }

      // Create new file record
      const file = await ctx.prisma.projectFile.create({
        data: {
          projectId,
          ...fileData,
          roundId: roundId || null,
          isLate: isLate || false,
          requirementId: requirementId || null,
        },
      })

      // Auto-transition: if uploading against a round requirement, check completion
      if (roundId && requirementId) {
        await checkRequirementsAndTransition(
          projectId,
          roundId,
          ctx.user.id,
          ctx.prisma,
        )
      }

      // Auto-analyze document (fire-and-forget, delayed for presigned upload)
      import('../services/document-analyzer').then(({ analyzeFileDelayed }) =>
        analyzeFileDelayed(file.id).catch((err) =>
          console.warn('[DocAnalyzer] Post-upload analysis failed:', err))
      ).catch(() => {})

      return file
    }),

  /**
   * Delete a file from submission
   */
  deleteFile: protectedProcedure
    .input(z.object({ fileId: z.string() }))
    .mutation(async ({ ctx, input }) => {
      const file = await ctx.prisma.projectFile.findUniqueOrThrow({
        where: { id: input.fileId },
        include: { project: { include: { teamMembers: { select: { userId: true } } } } },
      })

      // Verify ownership or team membership
      const isOwner = file.project.submittedByUserId === ctx.user.id
      const isTeamMember = file.project.teamMembers.some((tm) => tm.userId === ctx.user.id)

      if (!isOwner && !isTeamMember) {
        throw new TRPCError({
          code: 'FORBIDDEN',
          message: 'You do not have access to this file',
        })
      }

      // Can't delete if project is submitted
      if (file.project.submittedAt) {
        throw new TRPCError({
          code: 'BAD_REQUEST',
          message: 'Cannot modify a submitted project',
        })
      }

      await ctx.prisma.projectFile.delete({
        where: { id: input.fileId },
      })

      return { success: true }
    }),

  /**
   * Get status timeline from ProjectStatusHistory
   */
  getStatusTimeline: protectedProcedure
    .input(z.object({ projectId: z.string() }))
    .query(async ({ ctx, input }) => {
      // Verify user has access to this project
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            {
              teamMembers: {
                some: { userId: ctx.user.id },
              },
            },
          ],
        },
        select: { id: true },
      })

      if (!project) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Project not found',
        })
      }

      const history = await ctx.prisma.projectStatusHistory.findMany({
        where: { projectId: input.projectId },
        orderBy: { changedAt: 'asc' },
        select: {
          status: true,
          changedAt: true,
          changedBy: true,
        },
      })

      return history
    }),

  /**
   * Get submission status timeline
   */
  getSubmissionStatus: protectedProcedure
    .input(z.object({ projectId: z.string() }))
    .query(async ({ ctx, input }) => {
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            {
              teamMembers: {
                some: { userId: ctx.user.id },
              },
            },
          ],
        },
        include: {
          program: { select: { id: true, name: true, year: true } },
          files: true,
          teamMembers: {
            include: {
              user: {
                select: { id: true, name: true, email: true },
              },
            },
          },
          wonAwards: {
            select: { id: true, name: true },
          },
        },
      })

      if (!project) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Project not found',
        })
      }

      // Get the project status
      const currentStatus = project.status ?? 'SUBMITTED'

      // Fetch actual status history
      const statusHistory = await ctx.prisma.projectStatusHistory.findMany({
        where: { projectId: input.projectId },
        orderBy: { changedAt: 'asc' },
        select: { status: true, changedAt: true },
      })

      // Build a map of status -> earliest changedAt
      const statusDateMap = new Map<string, Date>()
      for (const entry of statusHistory) {
        if (!statusDateMap.has(entry.status)) {
          statusDateMap.set(entry.status, entry.changedAt)
        }
      }

      const isRejected = currentStatus === 'REJECTED'
      const hasWonAward = project.wonAwards.length > 0

      // Build timeline - handle REJECTED as terminal state
      const timeline = [
        {
          status: 'CREATED',
          label: 'Application Started',
          date: project.createdAt,
          completed: true,
          isTerminal: false,
        },
        {
          status: 'SUBMITTED',
          label: 'Application Submitted',
          date: project.submittedAt || statusDateMap.get('SUBMITTED') || null,
          completed: !!project.submittedAt || statusDateMap.has('SUBMITTED'),
          isTerminal: false,
        },
        {
          status: 'UNDER_REVIEW',
          label: 'Under Review',
          date: statusDateMap.get('ELIGIBLE') || statusDateMap.get('ASSIGNED') ||
            (currentStatus !== 'SUBMITTED' && project.submittedAt ? project.submittedAt : null),
          completed: ['ELIGIBLE', 'ASSIGNED', 'SEMIFINALIST', 'FINALIST', 'REJECTED'].includes(currentStatus),
          isTerminal: false,
        },
      ]

      if (isRejected) {
        // For rejected projects, show REJECTED as the terminal red step
        timeline.push({
          status: 'REJECTED',
          label: 'Not Selected',
          date: statusDateMap.get('REJECTED') || null,
          completed: true,
          isTerminal: true,
        })
      } else {
        // Normal progression
        timeline.push(
          {
            status: 'SEMIFINALIST',
            label: 'Semi-finalist',
            date: statusDateMap.get('SEMIFINALIST') || null,
            completed: ['SEMIFINALIST', 'FINALIST'].includes(currentStatus) || hasWonAward,
            isTerminal: false,
          },
          {
            status: 'FINALIST',
            label: 'Finalist',
            date: statusDateMap.get('FINALIST') || null,
            completed: currentStatus === 'FINALIST' || hasWonAward,
            isTerminal: false,
          },
        )

        if (hasWonAward) {
          timeline.push({
            status: 'WINNER',
            label: `Winner${project.wonAwards.length > 0 ? ` - ${project.wonAwards[0].name}` : ''}`,
            date: null,
            completed: true,
            isTerminal: false,
          })
        }
      }

      return {
        project,
        timeline,
        currentStatus,
      }
    }),

  /**
   * List all submissions for current user (including as team member)
   */
  listMySubmissions: protectedProcedure.query(async ({ ctx }) => {
    if (ctx.user.role !== 'APPLICANT') {
      throw new TRPCError({
        code: 'FORBIDDEN',
        message: 'Only applicants can access submissions',
      })
    }

    // Find projects where user is either the submitter OR a team member
    const projects = await ctx.prisma.project.findMany({
      where: {
        OR: [
          { submittedByUserId: ctx.user.id },
          {
            teamMembers: {
              some: { userId: ctx.user.id },
            },
          },
        ],
      },
      include: {
        program: { select: { id: true, name: true, year: true } },
        files: true,
        teamMembers: {
          include: {
            user: {
              select: { id: true, name: true, email: true },
            },
          },
        },
      },
      orderBy: { createdAt: 'desc' },
    })

    // Add user's role in each project
    return projects.map((project) => {
      const userMembership = project.teamMembers.find((tm) => tm.userId === ctx.user.id)
      return {
        ...project,
        userRole: userMembership?.role || (project.submittedByUserId === ctx.user.id ? 'LEAD' : null),
        isTeamLead: project.submittedByUserId === ctx.user.id || userMembership?.role === 'LEAD',
      }
    })
  }),

  /**
   * Get team members for a project
   */
  getTeamMembers: protectedProcedure
    .input(z.object({ projectId: z.string() }))
    .query(async ({ ctx, input }) => {
      // Verify user has access to this project
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            {
              teamMembers: {
                some: { userId: ctx.user.id },
              },
            },
          ],
        },
        include: {
          teamMembers: {
            include: {
              user: {
                select: {
                  id: true,
                  name: true,
                  email: true,
                  status: true,
                  lastLoginAt: true,
                },
              },
            },
            orderBy: { joinedAt: 'asc' },
          },
          submittedBy: {
            select: { id: true, name: true, email: true },
          },
        },
      })

      if (!project) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Project not found or you do not have access',
        })
      }

      return {
        teamMembers: project.teamMembers,
        submittedBy: project.submittedBy,
      }
    }),

  /**
   * Invite a new team member
   */
  inviteTeamMember: protectedProcedure
    .input(
      z.object({
        projectId: z.string(),
        email: z.string().email(),
        name: z.string().min(1),
        role: z.enum(['MEMBER', 'ADVISOR']),
        title: z.string().optional(),
      })
    )
    .mutation(async ({ ctx, input }) => {
      const normalizedEmail = input.email.trim().toLowerCase()

      // Verify user is team lead
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            {
              teamMembers: {
                some: {
                  userId: ctx.user.id,
                  role: 'LEAD',
                },
              },
            },
          ],
        },
      })

      if (!project) {
        throw new TRPCError({
          code: 'FORBIDDEN',
          message: 'Only team leads can invite new members',
        })
      }

      // Check if already a team member
      const existingMember = await ctx.prisma.teamMember.findFirst({
        where: {
          projectId: input.projectId,
          user: { email: normalizedEmail },
        },
      })

      if (existingMember) {
        throw new TRPCError({
          code: 'CONFLICT',
          message: 'This person is already a team member',
        })
      }

      // Find or create user
      let user = await ctx.prisma.user.findUnique({
        where: { email: normalizedEmail },
      })

      if (!user) {
        user = await ctx.prisma.user.create({
          data: {
            email: normalizedEmail,
            name: input.name,
            role: 'APPLICANT',
            status: 'NONE',
          },
        })
      }

      if (user.status === 'SUSPENDED') {
        throw new TRPCError({
          code: 'FORBIDDEN',
          message: 'This user account is suspended and cannot be invited',
        })
      }

      const teamLeadName = ctx.user.name?.trim() || 'A team lead'
      const baseUrl = process.env.NEXTAUTH_URL || 'https://portal.monaco-opc.com'
      const requiresAccountSetup = user.status !== 'ACTIVE'

      try {
        if (requiresAccountSetup) {
          const token = generateInviteToken()
          await ctx.prisma.user.update({
            where: { id: user.id },
            data: {
              status: 'INVITED',
              inviteToken: token,
              inviteTokenExpiresAt: new Date(Date.now() + TEAM_INVITE_TOKEN_EXPIRY_MS),
            },
          })

          const inviteUrl = `${baseUrl}/accept-invite?token=${token}`
          await sendTeamMemberInviteEmail(
            user.email,
            user.name || input.name,
            project.title,
            teamLeadName,
            inviteUrl
          )
        } else {
          await sendStyledNotificationEmail(
            user.email,
            user.name || input.name,
            'TEAM_INVITATION',
            {
              title: 'You were added to a project team',
              message: `${teamLeadName} added you to the project "${project.title}".`,
              linkUrl: `${baseUrl}/applicant/team`,
              linkLabel: 'Open Team',
              metadata: {
                projectId: project.id,
                projectName: project.title,
              },
            },
            `You've been added to "${project.title}"`
          )
        }
      } catch (error) {
        try {
          await ctx.prisma.notificationLog.create({
            data: {
              userId: user.id,
              channel: 'EMAIL',
              provider: 'SMTP',
              type: 'TEAM_INVITATION',
              status: 'FAILED',
              errorMsg: error instanceof Error ? error.message : 'Unknown error',
            },
          })
        } catch {
          // Never fail on notification logging
        }

        throw new TRPCError({
          code: 'INTERNAL_SERVER_ERROR',
          message: 'Failed to send invitation email. Please try again.',
        })
      }

      // Create team membership
      const teamMember = await ctx.prisma.teamMember.create({
        data: {
          projectId: input.projectId,
          userId: user.id,
          role: input.role,
          title: input.title,
        },
        include: {
          user: {
            select: { id: true, name: true, email: true, status: true },
          },
        },
      })

      try {
        await ctx.prisma.notificationLog.create({
          data: {
            userId: user.id,
            channel: 'EMAIL',
            provider: 'SMTP',
            type: 'TEAM_INVITATION',
            status: 'SENT',
          },
        })
      } catch {
        // Never fail on notification logging
      }

      try {
        await createNotification({
          userId: user.id,
          type: 'TEAM_INVITATION',
          title: 'Team Invitation',
          message: `${teamLeadName} added you to "${project.title}"`,
          linkUrl: '/applicant/team',
          linkLabel: 'View Team',
          priority: 'normal',
          metadata: {
            projectId: project.id,
            projectName: project.title,
          },
        })
      } catch {
        // Never fail invitation flow on in-app notification issues
      }

      return {
        teamMember,
        inviteEmailSent: true,
        requiresAccountSetup,
      }
    }),

  /**
   * Remove a team member
   */
  removeTeamMember: protectedProcedure
    .input(
      z.object({
        projectId: z.string(),
        userId: z.string(),
      })
    )
    .mutation(async ({ ctx, input }) => {
      // Verify user is team lead
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            {
              teamMembers: {
                some: {
                  userId: ctx.user.id,
                  role: 'LEAD',
                },
              },
            },
          ],
        },
      })

      if (!project) {
        throw new TRPCError({
          code: 'FORBIDDEN',
          message: 'Only team leads can remove members',
        })
      }

      // Can't remove the original submitter
      if (project.submittedByUserId === input.userId) {
        throw new TRPCError({
          code: 'BAD_REQUEST',
          message: 'Cannot remove the original applicant from the team',
        })
      }

      await ctx.prisma.teamMember.deleteMany({
        where: {
          projectId: input.projectId,
          userId: input.userId,
        },
      })

      return { success: true }
    }),

  /**
   * Send a message to the assigned mentor
   */
  sendMentorMessage: protectedProcedure
    .input(
      z.object({
        projectId: z.string(),
        message: z.string().min(1).max(5000),
      })
    )
    .mutation(async ({ ctx, input }) => {
      // Verify user is part of this project team
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            {
              teamMembers: {
                some: { userId: ctx.user.id },
              },
            },
          ],
        },
        include: {
          mentorAssignment: { select: { mentorId: true } },
        },
      })

      if (!project) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Project not found or you do not have access',
        })
      }

      if (!project.mentorAssignment) {
        throw new TRPCError({
          code: 'BAD_REQUEST',
          message: 'No mentor assigned to this project',
        })
      }

      const mentorMessage = await ctx.prisma.mentorMessage.create({
        data: {
          projectId: input.projectId,
          senderId: ctx.user.id,
          message: input.message,
        },
        include: {
          sender: {
            select: { id: true, name: true, email: true },
          },
        },
      })

      // Notify the mentor
      await createNotification({
        userId: project.mentorAssignment.mentorId,
        type: 'MENTOR_MESSAGE',
        title: 'New Message',
        message: `${ctx.user.name || 'Team member'} sent a message about "${project.title}"`,
        linkUrl: `/mentor/projects/${input.projectId}`,
        linkLabel: 'View Message',
        priority: 'normal',
        metadata: {
          projectId: input.projectId,
          projectName: project.title,
        },
      })

      return mentorMessage
    }),

  /**
   * Get mentor messages for a project (applicant side)
   */
  getMentorMessages: protectedProcedure
    .input(z.object({ projectId: z.string() }))
    .query(async ({ ctx, input }) => {
      // Verify user is part of this project team
      const project = await ctx.prisma.project.findFirst({
        where: {
          id: input.projectId,
          OR: [
            { submittedByUserId: ctx.user.id },
            {
              teamMembers: {
                some: { userId: ctx.user.id },
              },
            },
          ],
        },
        select: { id: true },
      })

      if (!project) {
        throw new TRPCError({
          code: 'NOT_FOUND',
          message: 'Project not found or you do not have access',
        })
      }

      const messages = await ctx.prisma.mentorMessage.findMany({
        where: { projectId: input.projectId },
        include: {
          sender: {
            select: { id: true, name: true, email: true, role: true },
          },
        },
        orderBy: { createdAt: 'asc' },
      })

      // Mark unread messages from mentor as read
      await ctx.prisma.mentorMessage.updateMany({
        where: {
          projectId: input.projectId,
          senderId: { not: ctx.user.id },
          isRead: false,
        },
        data: { isRead: true },
      })

      return messages
    }),

  /**
   * Get the applicant's dashboard data: their project (latest edition),
   * team members, open rounds for document submission, and status timeline.
   */
  getMyDashboard: protectedProcedure.query(async ({ ctx }) => {
    if (ctx.user.role !== 'APPLICANT') {
      throw new TRPCError({
        code: 'FORBIDDEN',
        message: 'Only applicants can access this',
      })
    }

    // Find the applicant's project (most recent, from active edition if possible)
    const project = await ctx.prisma.project.findFirst({
      where: {
        OR: [
          { submittedByUserId: ctx.user.id },
          { teamMembers: { some: { userId: ctx.user.id } } },
        ],
      },
      include: {
        program: { select: { id: true, name: true, year: true, status: true } },
        files: {
          orderBy: { createdAt: 'desc' },
        },
        teamMembers: {
          include: {
            user: {
              select: { id: true, name: true, email: true, status: true },
            },
          },
          orderBy: { joinedAt: 'asc' },
        },
        submittedBy: {
          select: { id: true, name: true, email: true },
        },
        mentorAssignment: {
          include: {
            mentor: {
              select: { id: true, name: true, email: true },
            },
          },
        },
        wonAwards: {
          select: { id: true, name: true },
        },
      },
      orderBy: { createdAt: 'desc' },
    })

    if (!project) {
      return { project: null, openRounds: [], timeline: [], currentStatus: null }
    }

    const currentStatus = project.status ?? 'SUBMITTED'

    // Fetch status history
    const statusHistory = await ctx.prisma.projectStatusHistory.findMany({
      where: { projectId: project.id },
      orderBy: { changedAt: 'asc' },
      select: { status: true, changedAt: true },
    })

    const statusDateMap = new Map<string, Date>()
    for (const entry of statusHistory) {
      if (!statusDateMap.has(entry.status)) {
        statusDateMap.set(entry.status, entry.changedAt)
      }
    }

    const isRejected = currentStatus === 'REJECTED'
    const hasWonAward = project.wonAwards.length > 0

    // Build timeline
    const timeline = [
      {
        status: 'CREATED',
        label: 'Application Started',
        date: project.createdAt,
        completed: true,
        isTerminal: false,
      },
      {
        status: 'SUBMITTED',
        label: 'Application Submitted',
        date: project.submittedAt || statusDateMap.get('SUBMITTED') || null,
        completed: !!project.submittedAt || statusDateMap.has('SUBMITTED'),
        isTerminal: false,
      },
      {
        status: 'UNDER_REVIEW',
        label: 'Under Review',
        date: statusDateMap.get('ELIGIBLE') || statusDateMap.get('ASSIGNED') ||
          (currentStatus !== 'SUBMITTED' && project.submittedAt ? project.submittedAt : null),
        completed: ['ELIGIBLE', 'ASSIGNED', 'SEMIFINALIST', 'FINALIST', 'REJECTED'].includes(currentStatus),
        isTerminal: false,
      },
    ]

    if (isRejected) {
      timeline.push({
        status: 'REJECTED',
        label: 'Not Selected',
        date: statusDateMap.get('REJECTED') || null,
        completed: true,
        isTerminal: true,
      })
    } else {
      timeline.push(
        {
          status: 'SEMIFINALIST',
          label: 'Semi-finalist',
          date: statusDateMap.get('SEMIFINALIST') || null,
          completed: ['SEMIFINALIST', 'FINALIST'].includes(currentStatus) || hasWonAward,
          isTerminal: false,
        },
        {
          status: 'FINALIST',
          label: 'Finalist',
          date: statusDateMap.get('FINALIST') || null,
          completed: currentStatus === 'FINALIST' || hasWonAward,
          isTerminal: false,
        },
      )

      if (hasWonAward) {
        timeline.push({
          status: 'WINNER',
          label: `Winner${project.wonAwards.length > 0 ? ` - ${project.wonAwards[0].name}` : ''}`,
          date: null,
          completed: true,
          isTerminal: false,
        })
      }
    }

    const programId = project.programId
    const openRounds = programId
      ? await ctx.prisma.round.findMany({
          where: {
            competition: { programId },
            status: 'ROUND_ACTIVE',
          },
          orderBy: { sortOrder: 'asc' },
          select: {
            id: true,
            name: true,
            slug: true,
            windowCloseAt: true,
          },
        })
      : []

    // Determine user's role in the project
    const userMembership = project.teamMembers.find((tm) => tm.userId === ctx.user.id)
    const isTeamLead = project.submittedByUserId === ctx.user.id || userMembership?.role === 'LEAD'

    // Check if project has passed intake
    const passedIntake = await ctx.prisma.projectRoundState.findFirst({
      where: { projectId: project.id, state: 'PASSED', round: { roundType: 'INTAKE' } },
      select: { id: true },
    })

    return {
      project: {
        ...project,
        isTeamLead,
        userRole: userMembership?.role || (project.submittedByUserId === ctx.user.id ? 'LEAD' : null),
      },
      openRounds,
      timeline,
      currentStatus,
      hasPassedIntake: !!passedIntake,
    }
  }),

  /**
   * Lightweight flags for conditional nav rendering.
   */
  getNavFlags: protectedProcedure.query(async ({ ctx }) => {
    if (ctx.user.role !== 'APPLICANT') {
      throw new TRPCError({ code: 'FORBIDDEN', message: 'Only applicants can access this' })
    }

    const project = await ctx.prisma.project.findFirst({
      where: {
        OR: [
          { submittedByUserId: ctx.user.id },
          { teamMembers: { some: { userId: ctx.user.id } } },
        ],
      },
      select: {
        id: true,
        programId: true,
        mentorAssignment: { select: { id: true } },
      },
    })

    if (!project) {
      return { hasMentor: false, hasEvaluationRounds: false }
    }

    // Check if mentor is assigned
    const hasMentor = !!project.mentorAssignment

    // Check if there are EVALUATION rounds (CLOSED/ARCHIVED) with applicantVisibility.enabled
    let hasEvaluationRounds = false
    if (project.programId) {
      const closedEvalRounds = await ctx.prisma.round.findMany({
        where: {
          competition: { programId: project.programId },
          roundType: 'EVALUATION',
          status: { in: ['ROUND_CLOSED', 'ROUND_ARCHIVED'] },
        },
        select: { configJson: true },
      })
      hasEvaluationRounds = closedEvalRounds.some((r) => {
        const parsed = EvaluationConfigSchema.safeParse(r.configJson)
        return parsed.success && parsed.data.applicantVisibility.enabled
      })
    }

    return { hasMentor, hasEvaluationRounds }
  }),

  /**
   * Filtered competition timeline showing only EVALUATION + Grand Finale.
   * Hides FILTERING/INTAKE/SUBMISSION/MENTORING from applicants.
   */
  getMyCompetitionTimeline: protectedProcedure.query(async ({ ctx }) => {
    if (ctx.user.role !== 'APPLICANT') {
      throw new TRPCError({ code: 'FORBIDDEN', message: 'Only applicants can access this' })
    }

    const project = await ctx.prisma.project.findFirst({
      where: {
        OR: [
          { submittedByUserId: ctx.user.id },
          { teamMembers: { some: { userId: ctx.user.id } } },
        ],
      },
      select: { id: true, programId: true },
    })

    if (!project?.programId) {
      return { competitionName: null, entries: [] }
    }

    // Find competition via programId (fixes the programId/competitionId bug)
    const competition = await ctx.prisma.competition.findFirst({
      where: { programId: project.programId },
      select: { id: true, name: true },
    })

    if (!competition) {
      return { competitionName: null, entries: [] }
    }

    // Get all rounds ordered by sortOrder
    const rounds = await ctx.prisma.round.findMany({
      where: { competitionId: competition.id },
      orderBy: { sortOrder: 'asc' },
      select: {
        id: true,
        name: true,
        roundType: true,
        status: true,
        windowOpenAt: true,
        windowCloseAt: true,
      },
    })

    // Get all ProjectRoundState for this project
    const projectStates = await ctx.prisma.projectRoundState.findMany({
      where: { projectId: project.id },
      select: { roundId: true, state: true },
    })
    const stateMap = new Map(projectStates.map((ps) => [ps.roundId, ps.state]))

    type TimelineEntry = {
      id: string
      label: string
      roundType: 'EVALUATION' | 'GRAND_FINALE'
      status: string
      windowOpenAt: Date | null
      windowCloseAt: Date | null
      projectState: string | null
      isSynthesizedRejection: boolean
    }

    const entries: TimelineEntry[] = []

    // Build lookup for filtering rounds and their next evaluation round
    const filteringRounds = rounds.filter((r) => r.roundType === 'FILTERING')
    const evalRounds = rounds.filter((r) => r.roundType === 'EVALUATION')
    const liveFinalRounds = rounds.filter((r) => r.roundType === 'LIVE_FINAL')
    const deliberationRounds = rounds.filter((r) => r.roundType === 'DELIBERATION')

    // Process EVALUATION rounds
    for (const evalRound of evalRounds) {
      const actualState = stateMap.get(evalRound.id) ?? null

      // Check if a FILTERING round before this eval round rejected the project
      let projectState = actualState
      let isSynthesizedRejection = false

      // Find FILTERING rounds that come before this eval round in sortOrder
      const evalSortOrder = rounds.findIndex((r) => r.id === evalRound.id)
      const precedingFilterRounds = filteringRounds.filter((fr) => {
        const frIdx = rounds.findIndex((r) => r.id === fr.id)
        return frIdx < evalSortOrder
      })

      for (const fr of precedingFilterRounds) {
        const filterState = stateMap.get(fr.id)
        if (filterState === 'REJECTED') {
          projectState = 'REJECTED'
          isSynthesizedRejection = true
          break
        }
        if ((filterState === 'IN_PROGRESS' || filterState === 'PENDING') && !actualState) {
          projectState = 'IN_PROGRESS'
          isSynthesizedRejection = true
        }
      }

      entries.push({
        id: evalRound.id,
        label: evalRound.name,
        roundType: 'EVALUATION',
        status: evalRound.status,
        windowOpenAt: evalRound.windowOpenAt,
        windowCloseAt: evalRound.windowCloseAt,
        projectState,
        isSynthesizedRejection,
      })
    }

    // Grand Finale: combine LIVE_FINAL + DELIBERATION
    if (liveFinalRounds.length > 0 || deliberationRounds.length > 0) {
      const grandFinaleRounds = [...liveFinalRounds, ...deliberationRounds]

      // Project state: prefer LIVE_FINAL state, then DELIBERATION
      let gfState: string | null = null
      for (const lfr of liveFinalRounds) {
        const s = stateMap.get(lfr.id)
        if (s) { gfState = s; break }
      }
      if (!gfState) {
        for (const dr of deliberationRounds) {
          const s = stateMap.get(dr.id)
          if (s) { gfState = s; break }
        }
      }

      // Status: most advanced status among grouped rounds
      const statusPriority: Record<string, number> = {
        ROUND_ARCHIVED: 3,
        ROUND_CLOSED: 2,
        ROUND_ACTIVE: 1,
        ROUND_DRAFT: 0,
      }
      let gfStatus = 'ROUND_DRAFT'
      for (const r of grandFinaleRounds) {
        if ((statusPriority[r.status] ?? 0) > (statusPriority[gfStatus] ?? 0)) {
          gfStatus = r.status
        }
      }

      // Use earliest window open and latest window close
      const openDates = grandFinaleRounds.map((r) => r.windowOpenAt).filter(Boolean) as Date[]
      const closeDates = grandFinaleRounds.map((r) => r.windowCloseAt).filter(Boolean) as Date[]

      // Check if a prior filtering rejection should propagate
      let isSynthesizedRejection = false
      const gfSortOrder = Math.min(
        ...grandFinaleRounds.map((r) => rounds.findIndex((rr) => rr.id === r.id))
      )
      for (const fr of filteringRounds) {
        const frIdx = rounds.findIndex((r) => r.id === fr.id)
        if (frIdx < gfSortOrder && stateMap.get(fr.id) === 'REJECTED') {
          gfState = 'REJECTED'
          isSynthesizedRejection = true
          break
        }
      }

      entries.push({
        id: 'grand-finale',
        label: 'Grand Finale',
        roundType: 'GRAND_FINALE',
        status: gfStatus,
        windowOpenAt: openDates.length > 0 ? new Date(Math.min(...openDates.map((d) => d.getTime()))) : null,
        windowCloseAt: closeDates.length > 0 ? new Date(Math.max(...closeDates.map((d) => d.getTime()))) : null,
        projectState: gfState,
        isSynthesizedRejection,
      })
    }

    // Handle projects manually created at a non-intake round:
    // If a project has state in a later round but not earlier, mark prior rounds as PASSED.
    // Find the earliest visible entry (EVALUATION or GRAND_FINALE) that has a real state.
    const firstEntryWithState = entries.findIndex(
      (e) => e.projectState !== null && !e.isSynthesizedRejection
    )
    if (firstEntryWithState > 0) {
      // All entries before the first real state should show as PASSED (if the round is closed/archived)
      for (let i = 0; i < firstEntryWithState; i++) {
        const entry = entries[i]
        if (!entry.projectState) {
          const roundClosed = entry.status === 'ROUND_CLOSED' || entry.status === 'ROUND_ARCHIVED'
          if (roundClosed) {
            entry.projectState = 'PASSED'
            entry.isSynthesizedRejection = false // not a rejection, it's a synthesized pass
          }
        }
      }
    }

    // If the project was rejected in filtering and there are entries after,
    // null-out states for entries after the rejection point
    let foundRejection = false
    for (const entry of entries) {
      if (foundRejection) {
        entry.projectState = null
      }
      if (entry.projectState === 'REJECTED' && entry.isSynthesizedRejection) {
        foundRejection = true
      }
    }

    return { competitionName: competition.name, entries }
  }),

  /**
   * Get anonymous jury evaluations visible to the applicant.
   * Respects per-round applicantVisibility config. NEVER leaks juror identity.
   */
  getMyEvaluations: protectedProcedure.query(async ({ ctx }) => {
    if (ctx.user.role !== 'APPLICANT') {
      throw new TRPCError({ code: 'FORBIDDEN', message: 'Only applicants can access this' })
    }

    const project = await ctx.prisma.project.findFirst({
      where: {
        OR: [
          { submittedByUserId: ctx.user.id },
          { teamMembers: { some: { userId: ctx.user.id } } },
        ],
      },
      select: { id: true, programId: true },
    })

    if (!project?.programId) return []

    // Get closed/archived EVALUATION rounds for this competition
    const evalRounds = await ctx.prisma.round.findMany({
      where: {
        competition: { programId: project.programId },
        roundType: 'EVALUATION',
        status: { in: ['ROUND_CLOSED', 'ROUND_ARCHIVED'] },
      },
      select: {
        id: true,
        name: true,
        configJson: true,
      },
      orderBy: { sortOrder: 'asc' },
    })

    const results: Array<{
      roundId: string
      roundName: string
      evaluationCount: number
      evaluations: Array<{
        id: string
        submittedAt: Date | null
        globalScore: number | null
        criterionScores: Prisma.JsonValue | null
        feedbackText: string | null
        criteria: Prisma.JsonValue | null
      }>
    }> = []

    for (const round of evalRounds) {
      const parsed = EvaluationConfigSchema.safeParse(round.configJson)
      if (!parsed.success || !parsed.data.applicantVisibility.enabled) continue

      const vis = parsed.data.applicantVisibility

      // Get evaluations via assignments — NEVER select userId or user relation
      const evaluations = await ctx.prisma.evaluation.findMany({
        where: {
          assignment: {
            projectId: project.id,
            roundId: round.id,
          },
          status: { in: ['SUBMITTED', 'LOCKED'] },
        },
        select: {
          id: true,
          submittedAt: true,
          globalScore: vis.showGlobalScore,
          criterionScoresJson: vis.showCriterionScores,
          feedbackText: vis.showFeedbackText,
          form: vis.showCriterionScores ? { select: { criteriaJson: true } } : false,
        },
        orderBy: { submittedAt: 'asc' },
      })

      results.push({
        roundId: round.id,
        roundName: round.name,
        evaluationCount: evaluations.length,
        evaluations: evaluations.map((ev) => ({
          id: ev.id,
          submittedAt: ev.submittedAt,
          globalScore: vis.showGlobalScore ? (ev as { globalScore?: number | null }).globalScore ?? null : null,
          criterionScores: vis.showCriterionScores ? (ev as { criterionScoresJson?: Prisma.JsonValue }).criterionScoresJson ?? null : null,
          feedbackText: vis.showFeedbackText ? (ev as { feedbackText?: string | null }).feedbackText ?? null : null,
          criteria: vis.showCriterionScores ? ((ev as { form?: { criteriaJson: Prisma.JsonValue } | null }).form?.criteriaJson ?? null) : null,
        })),
      })
    }

    return results
  }),

  /**
   * Upcoming deadlines for dashboard card.
   */
  getUpcomingDeadlines: protectedProcedure.query(async ({ ctx }) => {
    if (ctx.user.role !== 'APPLICANT') {
      throw new TRPCError({ code: 'FORBIDDEN', message: 'Only applicants can access this' })
    }

    const project = await ctx.prisma.project.findFirst({
      where: {
        OR: [
          { submittedByUserId: ctx.user.id },
          { teamMembers: { some: { userId: ctx.user.id } } },
        ],
      },
      select: { programId: true },
    })

    if (!project?.programId) return []

    const now = new Date()
    const rounds = await ctx.prisma.round.findMany({
      where: {
        competition: { programId: project.programId },
        status: 'ROUND_ACTIVE',
        windowCloseAt: { gt: now },
      },
      select: {
        id: true,
        name: true,
        windowCloseAt: true,
      },
      orderBy: { windowCloseAt: 'asc' },
    })

    return rounds.map((r) => ({
      roundName: r.name,
      windowCloseAt: r.windowCloseAt!,
    }))
  }),

  /**
   * Document completeness progress for dashboard card.
   */
  getDocumentCompleteness: protectedProcedure.query(async ({ ctx }) => {
    if (ctx.user.role !== 'APPLICANT') {
      throw new TRPCError({ code: 'FORBIDDEN', message: 'Only applicants can access this' })
    }

    const project = await ctx.prisma.project.findFirst({
      where: {
        OR: [
          { submittedByUserId: ctx.user.id },
          { teamMembers: { some: { userId: ctx.user.id } } },
        ],
      },
      select: { id: true, programId: true },
    })

    if (!project?.programId) return []

    // Find active rounds with file requirements
    const rounds = await ctx.prisma.round.findMany({
      where: {
        competition: { programId: project.programId },
        status: 'ROUND_ACTIVE',
        fileRequirements: { some: {} },
      },
      select: {
        id: true,
        name: true,
        fileRequirements: {
          select: { id: true },
        },
      },
      orderBy: { sortOrder: 'asc' },
    })

    const results: Array<{ roundId: string; roundName: string; required: number; uploaded: number }> = []

    for (const round of rounds) {
      const requirementIds = round.fileRequirements.map((fr) => fr.id)
      if (requirementIds.length === 0) continue

      const uploaded = await ctx.prisma.projectFile.count({
        where: {
          projectId: project.id,
          requirementId: { in: requirementIds },
        },
      })

      results.push({
        roundId: round.id,
        roundName: round.name,
        required: requirementIds.length,
        uploaded,
      })
    }

    return results
  }),
})