import { z } from 'zod'
import { TRPCError } from '@trpc/server'
import { router, adminProcedure, protectedProcedure } from '../trpc'
import { logAudit } from '../utils/audit'

// ─── Shared zod schemas ──────────────────────────────────────────────────────

const dietaryTags = z.array(
  z.enum(['VEGETARIAN', 'VEGAN', 'GLUTEN_FREE', 'PESCATARIAN']),
)

const allergens = z.array(
  z.enum([
    'GLUTEN', 'CRUSTACEANS', 'EGGS', 'FISH', 'PEANUTS', 'SOYBEANS', 'MILK',
    'TREE_NUTS', 'CELERY', 'MUSTARD', 'SESAME', 'SULPHITES', 'LUPIN', 'MOLLUSCS',
  ]),
)

// ─── Router ──────────────────────────────────────────────────────────────────

export const lunchRouter = router({
  /**
   * Get-or-create the LunchEvent for a program. Lazy creation mirrors
   * the hotel pattern: callers don't have to know whether the row
   * already exists.
   */
  getEvent: adminProcedure
    .input(z.object({ programId: z.string() }))
    .query(async ({ ctx, input }) => {
      const existing = await ctx.prisma.lunchEvent.findUnique({
        where: { programId: input.programId },
      })
      if (existing) return existing
      return ctx.prisma.lunchEvent.create({ data: { programId: input.programId } })
    }),

  /** Patch any subset of LunchEvent config fields. Audit-logged. */
  updateEvent: adminProcedure
    .input(
      z.object({
        programId: z.string(),
        enabled: z.boolean().optional(),
        eventAt: z.date().nullable().optional(),
        endAt: z.date().nullable().optional(),
        venue: z.string().nullable().optional(),
        notes: z.string().nullable().optional(),
        changeCutoffHours: z.number().int().min(0).max(720).optional(),
        reminderHoursBeforeDeadline: z
          .number()
          .int()
          .min(0)
          .max(720)
          .nullable()
          .optional(),
        cronEnabled: z.boolean().optional(),
        extraRecipients: z.array(z.string().email()).optional(),
      }),
    )
    .mutation(async ({ ctx, input }) => {
      const { programId, ...patch } = input
      // Lazy-create before patching so updateEvent doubles as "create + update"
      await ctx.prisma.lunchEvent.upsert({
        where: { programId },
        create: { programId },
        update: {},
      })
      const updated = await ctx.prisma.lunchEvent.update({
        where: { programId },
        data: patch,
      })
      await logAudit({
        prisma: ctx.prisma,
        userId: ctx.user.id,
        action: 'LUNCH_EVENT_UPDATED',
        entityType: 'LunchEvent',
        entityId: updated.id,
        detailsJson: patch as Record<string, unknown>,
      })
      return updated
    }),
})