import { z } from 'zod'
import { router, adminProcedure } from '../trpc'

export const dashboardRouter = router({
  /**
   * Get all dashboard stats in a single query batch.
   * Replaces the 16 parallel Prisma queries that were previously
   * run during SSR, which blocked the event loop and caused 503s.
   */
  getStats: adminProcedure
    .input(z.object({ editionId: z.string() }))
    .query(async ({ ctx, input }) => {
      const { editionId } = input

      const edition = await ctx.prisma.program.findUnique({
        where: { id: editionId },
        select: { name: true, year: true },
      })

      if (!edition) return null

      const sevenDaysAgo = new Date(Date.now() - 7 * 24 * 60 * 60 * 1000)

      const [
        activeStageCount,
        totalStageCount,
        projectCount,
        newProjectsThisWeek,
        totalJurors,
        activeJurors,
        evaluationStats,
        totalAssignments,
        recentStages,
        latestProjects,
        categoryBreakdown,
        oceanIssueBreakdown,
        recentActivity,
        pendingCOIs,
        draftStages,
        unassignedProjects,
      ] = await Promise.all([
        ctx.prisma.stage.count({
          where: { track: { pipeline: { programId: editionId } }, status: 'STAGE_ACTIVE' },
        }),
        ctx.prisma.stage.count({
          where: { track: { pipeline: { programId: editionId } } },
        }),
        ctx.prisma.project.count({
          where: { programId: editionId },
        }),
        ctx.prisma.project.count({
          where: {
            programId: editionId,
            createdAt: { gte: sevenDaysAgo },
          },
        }),
        ctx.prisma.user.count({
          where: {
            role: 'JURY_MEMBER',
            status: { in: ['ACTIVE', 'INVITED', 'NONE'] },
            assignments: { some: { stage: { track: { pipeline: { programId: editionId } } } } },
          },
        }),
        ctx.prisma.user.count({
          where: {
            role: 'JURY_MEMBER',
            status: 'ACTIVE',
            assignments: { some: { stage: { track: { pipeline: { programId: editionId } } } } },
          },
        }),
        ctx.prisma.evaluation.groupBy({
          by: ['status'],
          where: { assignment: { stage: { track: { pipeline: { programId: editionId } } } } },
          _count: true,
        }),
        ctx.prisma.assignment.count({
          where: { stage: { track: { pipeline: { programId: editionId } } } },
        }),
        ctx.prisma.stage.findMany({
          where: { track: { pipeline: { programId: editionId } } },
          orderBy: { createdAt: 'desc' },
          take: 5,
          select: {
            id: true,
            name: true,
            status: true,
            stageType: true,
            windowOpenAt: true,
            windowCloseAt: true,
            _count: {
              select: {
                projectStageStates: true,
                assignments: true,
              },
            },
            assignments: {
              select: {
                evaluation: { select: { status: true } },
              },
            },
          },
        }),
        ctx.prisma.project.findMany({
          where: { programId: editionId },
          orderBy: { createdAt: 'desc' },
          take: 8,
          select: {
            id: true,
            title: true,
            teamName: true,
            country: true,
            competitionCategory: true,
            oceanIssue: true,
            logoKey: true,
            createdAt: true,
            submittedAt: true,
            status: true,
          },
        }),
        ctx.prisma.project.groupBy({
          by: ['competitionCategory'],
          where: { programId: editionId },
          _count: true,
        }),
        ctx.prisma.project.groupBy({
          by: ['oceanIssue'],
          where: { programId: editionId },
          _count: true,
        }),
        ctx.prisma.auditLog.findMany({
          where: {
            timestamp: { gte: sevenDaysAgo },
          },
          orderBy: { timestamp: 'desc' },
          take: 8,
          select: {
            id: true,
            action: true,
            entityType: true,
            timestamp: true,
            user: { select: { name: true } },
          },
        }),
        ctx.prisma.conflictOfInterest.count({
          where: {
            hasConflict: true,
            reviewedAt: null,
            assignment: { stage: { track: { pipeline: { programId: editionId } } } },
          },
        }),
        ctx.prisma.stage.count({
          where: { track: { pipeline: { programId: editionId } }, status: 'STAGE_DRAFT' },
        }),
        ctx.prisma.project.count({
          where: {
            programId: editionId,
            projectStageStates: {
              some: {
                stage: { status: 'STAGE_ACTIVE' },
              },
            },
            assignments: { none: {} },
          },
        }),
      ])

      return {
        edition,
        activeStageCount,
        totalStageCount,
        projectCount,
        newProjectsThisWeek,
        totalJurors,
        activeJurors,
        evaluationStats,
        totalAssignments,
        recentStages,
        latestProjects,
        categoryBreakdown,
        oceanIssueBreakdown,
        recentActivity,
        pendingCOIs,
        draftStages,
        unassignedProjects,
      }
    }),
})