import type { FastifyPluginAsync } from 'fastify'
import {
  PaginationSchema,
  InstructorCreateSchema,
  InstructorUpdateSchema,
  LessonTypeCreateSchema,
  LessonTypeUpdateSchema,
  ScheduleSlotCreateSchema,
  ScheduleSlotUpdateSchema,
  EnrollmentCreateSchema,
  EnrollmentUpdateSchema,
  EnrollmentStatusUpdateSchema,
  LessonSessionStatusUpdateSchema,
  LessonSessionNotesSchema,
  LessonSessionUpdateSchema,
  GradingScaleCreateSchema,
  GradingScaleUpdateSchema,
  LessonPlanCreateSchema,
  LessonPlanUpdateSchema,
  LessonPlanItemUpdateSchema,
  GradeCreateSchema,
  SessionPlanItemsSchema,
  LessonPlanTemplateCreateSchema,
  LessonPlanTemplateUpdateSchema,
  TemplateInstantiateSchema,
  InstructorBlockedDateCreateSchema,
  StoreClosureCreateSchema,
} from '@lunarfront/shared/schemas'
import { InstructorService, LessonTypeService, ScheduleSlotService, EnrollmentService, LessonSessionService, GradingScaleService, LessonPlanService, LessonPlanItemService, LessonPlanTemplateService, GradeHistoryService, SessionPlanItemService, InstructorBlockedDateService, StoreClosureService } from '../../services/lesson.service.js'

export const lessonRoutes: FastifyPluginAsync = async (app) => {
  // --- Instructors ---

  app.post('/instructors', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const parsed = InstructorCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const instructor = await InstructorService.create(app.db, parsed.data)
    return reply.status(201).send(instructor)
  })

  app.get('/instructors', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const params = PaginationSchema.parse(request.query)
    const result = await InstructorService.list(app.db, params)
    return reply.send(result)
  })

  app.get('/instructors/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const instructor = await InstructorService.getById(app.db, id)
    if (!instructor) return reply.status(404).send({ error: { message: 'Instructor not found', statusCode: 404 } })
    return reply.send(instructor)
  })

  app.patch('/instructors/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = InstructorUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const instructor = await InstructorService.update(app.db, id, parsed.data)
    if (!instructor) return reply.status(404).send({ error: { message: 'Instructor not found', statusCode: 404 } })
    return reply.send(instructor)
  })

  app.delete('/instructors/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const instructor = await InstructorService.delete(app.db, id)
    if (!instructor) return reply.status(404).send({ error: { message: 'Instructor not found', statusCode: 404 } })
    return reply.send(instructor)
  })

  // --- Lesson Types ---

  app.post('/lesson-types', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const parsed = LessonTypeCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const lessonType = await LessonTypeService.create(app.db, parsed.data)
    return reply.status(201).send(lessonType)
  })

  app.get('/lesson-types', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const params = PaginationSchema.parse(request.query)
    const result = await LessonTypeService.list(app.db, params)
    return reply.send(result)
  })

  app.get('/lesson-types/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const lessonType = await LessonTypeService.getById(app.db, id)
    if (!lessonType) return reply.status(404).send({ error: { message: 'Lesson type not found', statusCode: 404 } })
    return reply.send(lessonType)
  })

  app.patch('/lesson-types/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = LessonTypeUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const lessonType = await LessonTypeService.update(app.db, id, parsed.data)
    if (!lessonType) return reply.status(404).send({ error: { message: 'Lesson type not found', statusCode: 404 } })
    return reply.send(lessonType)
  })

  app.delete('/lesson-types/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const lessonType = await LessonTypeService.delete(app.db, id)
    if (!lessonType) return reply.status(404).send({ error: { message: 'Lesson type not found', statusCode: 404 } })
    return reply.send(lessonType)
  })

  // --- Schedule Slots ---

  app.post('/schedule-slots', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const parsed = ScheduleSlotCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const result = await ScheduleSlotService.create(app.db, parsed.data)
    if ('error' in result) {
      return reply.status(409).send({ error: { message: result.error, statusCode: 409 } })
    }
    return reply.status(201).send(result)
  })

  app.get('/schedule-slots', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const query = request.query as Record<string, string | undefined>
    const params = PaginationSchema.parse(query)
    const filters = {
      instructorId: query.instructorId,
      dayOfWeek: query.dayOfWeek !== undefined ? Number(query.dayOfWeek) : undefined,
    }
    const result = await ScheduleSlotService.list(app.db, params, filters)
    return reply.send(result)
  })

  app.get('/schedule-slots/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const slot = await ScheduleSlotService.getById(app.db, id)
    if (!slot) return reply.status(404).send({ error: { message: 'Schedule slot not found', statusCode: 404 } })
    return reply.send(slot)
  })

  app.patch('/schedule-slots/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = ScheduleSlotUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const result = await ScheduleSlotService.update(app.db, id, parsed.data)
    if (!result) return reply.status(404).send({ error: { message: 'Schedule slot not found', statusCode: 404 } })
    if ('error' in result) {
      return reply.status(409).send({ error: { message: result.error, statusCode: 409 } })
    }
    return reply.send(result)
  })

  app.delete('/schedule-slots/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const slot = await ScheduleSlotService.delete(app.db, id)
    if (!slot) return reply.status(404).send({ error: { message: 'Schedule slot not found', statusCode: 404 } })
    return reply.send(slot)
  })

  // --- Enrollments ---

  app.post('/enrollments', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const parsed = EnrollmentCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const result = await EnrollmentService.create(app.db, parsed.data)
    if ('error' in result) {
      return reply.status(409).send({ error: { message: result.error, statusCode: 409 } })
    }
    return reply.status(201).send(result)
  })

  app.get('/enrollments', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const query = request.query as Record<string, string | undefined>
    const params = PaginationSchema.parse(query)
    const filters = {
      memberId: query.memberId,
      accountId: query.accountId,
      instructorId: query.instructorId,
      status: query.status?.split(',').filter(Boolean),
    }
    const result = await EnrollmentService.list(app.db, params, filters)
    return reply.send(result)
  })

  app.get('/enrollments/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const enrollment = await EnrollmentService.getById(app.db, id)
    if (!enrollment) return reply.status(404).send({ error: { message: 'Enrollment not found', statusCode: 404 } })
    return reply.send(enrollment)
  })

  app.patch('/enrollments/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = EnrollmentUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const enrollment = await EnrollmentService.update(app.db, id, parsed.data)
    if (!enrollment) return reply.status(404).send({ error: { message: 'Enrollment not found', statusCode: 404 } })
    return reply.send(enrollment)
  })

  app.post('/enrollments/:id/status', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = EnrollmentStatusUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const enrollment = await EnrollmentService.updateStatus(app.db, id, parsed.data.status)
    if (!enrollment) return reply.status(404).send({ error: { message: 'Enrollment not found', statusCode: 404 } })
    return reply.send(enrollment)
  })

  app.post('/enrollments/:id/generate-sessions', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const query = request.query as Record<string, string | undefined>
    const weeks = query.weeks ? Number(query.weeks) : 4
    const sessions = await LessonSessionService.generateSessions(app.db, id, weeks)
    return reply.send({ generated: sessions.length, sessions })
  })

  // --- Lesson Sessions ---

  app.get('/lesson-sessions', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const query = request.query as Record<string, string | undefined>
    const params = PaginationSchema.parse(query)
    const filters = {
      enrollmentId: query.enrollmentId,
      instructorId: query.instructorId,
      status: query.status?.split(',').filter(Boolean),
      dateFrom: query.dateFrom,
      dateTo: query.dateTo,
    }
    const result = await LessonSessionService.list(app.db, params, filters)
    return reply.send(result)
  })

  app.get('/lesson-sessions/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const session = await LessonSessionService.getById(app.db, id)
    if (!session) return reply.status(404).send({ error: { message: 'Lesson session not found', statusCode: 404 } })
    return reply.send(session)
  })

  app.patch('/lesson-sessions/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = LessonSessionUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const result = await LessonSessionService.update(app.db, id, parsed.data)
    if (!result) return reply.status(404).send({ error: { message: 'Lesson session not found', statusCode: 404 } })
    if ('error' in result) return reply.status(409).send({ error: { message: result.error, statusCode: 409 } })
    return reply.send(result)
  })

  app.post('/lesson-sessions/:id/status', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = LessonSessionStatusUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const session = await LessonSessionService.updateStatus(app.db, id, parsed.data.status)
    if (!session) return reply.status(404).send({ error: { message: 'Lesson session not found', statusCode: 404 } })
    return reply.send(session)
  })

  app.post('/lesson-sessions/:id/notes', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = LessonSessionNotesSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const session = await LessonSessionService.updateNotes(app.db, id, parsed.data)
    if (!session) return reply.status(404).send({ error: { message: 'Lesson session not found', statusCode: 404 } })
    return reply.send(session)
  })

  // --- Grading Scales ---

  app.post('/grading-scales', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const parsed = GradingScaleCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const scale = await GradingScaleService.create(app.db, parsed.data, request.user.id)
    return reply.status(201).send(scale)
  })

  app.get('/grading-scales', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const params = PaginationSchema.parse(request.query)
    const result = await GradingScaleService.list(app.db, params)
    return reply.send(result)
  })

  app.get('/grading-scales/all', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (_request, reply) => {
    const scales = await GradingScaleService.listAll(app.db)
    return reply.send(scales)
  })

  app.get('/grading-scales/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const scale = await GradingScaleService.getById(app.db, id)
    if (!scale) return reply.status(404).send({ error: { message: 'Grading scale not found', statusCode: 404 } })
    return reply.send(scale)
  })

  app.patch('/grading-scales/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = GradingScaleUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const scale = await GradingScaleService.update(app.db, id, parsed.data)
    if (!scale) return reply.status(404).send({ error: { message: 'Grading scale not found', statusCode: 404 } })
    return reply.send(scale)
  })

  app.delete('/grading-scales/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const scale = await GradingScaleService.delete(app.db, id)
    if (!scale) return reply.status(404).send({ error: { message: 'Grading scale not found', statusCode: 404 } })
    return reply.send(scale)
  })

  // --- Lesson Plans ---

  app.post('/lesson-plans', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const parsed = LessonPlanCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const plan = await LessonPlanService.create(app.db, parsed.data, request.user.id)
    return reply.status(201).send(plan)
  })

  app.get('/lesson-plans', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const query = request.query as Record<string, string | undefined>
    const params = PaginationSchema.parse(query)
    const filters = {
      enrollmentId: query.enrollmentId,
      memberId: query.memberId,
      isActive: query.isActive === 'true' ? true : query.isActive === 'false' ? false : undefined,
    }
    const result = await LessonPlanService.list(app.db, params, filters)
    return reply.send(result)
  })

  app.get('/lesson-plans/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const plan = await LessonPlanService.getById(app.db, id)
    if (!plan) return reply.status(404).send({ error: { message: 'Lesson plan not found', statusCode: 404 } })
    return reply.send(plan)
  })

  app.patch('/lesson-plans/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = LessonPlanUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const plan = await LessonPlanService.update(app.db, id, parsed.data)
    if (!plan) return reply.status(404).send({ error: { message: 'Lesson plan not found', statusCode: 404 } })
    return reply.send(plan)
  })

  // --- Lesson Plan Items ---

  app.patch('/lesson-plan-items/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = LessonPlanItemUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const item = await LessonPlanItemService.update(app.db, id, parsed.data)
    if (!item) return reply.status(404).send({ error: { message: 'Lesson plan item not found', statusCode: 404 } })
    return reply.send(item)
  })

  // --- Lesson Plan Templates ---

  app.post('/lesson-plan-templates', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const parsed = LessonPlanTemplateCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const template = await LessonPlanTemplateService.create(app.db, parsed.data, request.user.id)
    return reply.status(201).send(template)
  })

  app.get('/lesson-plan-templates', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const query = request.query as Record<string, string | undefined>
    const params = PaginationSchema.parse(query)
    const filters = {
      instrument: query.instrument,
      skillLevel: query.skillLevel,
    }
    const result = await LessonPlanTemplateService.list(app.db, params, filters)
    return reply.send(result)
  })

  app.get('/lesson-plan-templates/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const template = await LessonPlanTemplateService.getById(app.db, id)
    if (!template) return reply.status(404).send({ error: { message: 'Template not found', statusCode: 404 } })
    return reply.send(template)
  })

  app.patch('/lesson-plan-templates/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = LessonPlanTemplateUpdateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const template = await LessonPlanTemplateService.update(app.db, id, parsed.data)
    if (!template) return reply.status(404).send({ error: { message: 'Template not found', statusCode: 404 } })
    return reply.send(template)
  })

  app.delete('/lesson-plan-templates/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const template = await LessonPlanTemplateService.delete(app.db, id)
    if (!template) return reply.status(404).send({ error: { message: 'Template not found', statusCode: 404 } })
    return reply.send(template)
  })

  app.post('/lesson-plan-templates/:id/create-plan', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = TemplateInstantiateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const plan = await LessonPlanTemplateService.instantiate(app.db, id, parsed.data, request.user.id)
    if (!plan) return reply.status(404).send({ error: { message: 'Template not found', statusCode: 404 } })
    return reply.status(201).send(plan)
  })

  // --- Grade History ---

  app.post('/lesson-plan-items/:id/grades', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = GradeCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const result = await GradeHistoryService.create(app.db, id, parsed.data, request.user.id)
    if (!result) return reply.status(404).send({ error: { message: 'Lesson plan item not found', statusCode: 404 } })
    return reply.status(201).send(result)
  })

  app.get('/lesson-plan-items/:id/grade-history', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const history = await GradeHistoryService.list(app.db, id)
    return reply.send(history)
  })

  // --- Session Plan Items ---

  app.post('/lesson-sessions/:id/plan-items', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = SessionPlanItemsSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const result = await SessionPlanItemService.linkItems(app.db, id, parsed.data)
    if (result === null) return reply.status(404).send({ error: { message: 'Lesson session not found', statusCode: 404 } })
    return reply.status(201).send({ linked: result.length, items: result })
  })

  app.get('/lesson-sessions/:id/plan-items', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const items = await SessionPlanItemService.listForSession(app.db, id)
    return reply.send(items)
  })

  // --- Instructor Blocked Dates ---

  app.post('/instructors/:id/blocked-dates', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const parsed = InstructorBlockedDateCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const instructor = await InstructorService.getById(app.db, id)
    if (!instructor) return reply.status(404).send({ error: { message: 'Instructor not found', statusCode: 404 } })
    const result = await InstructorBlockedDateService.create(app.db, id, parsed.data)
    if ('error' in result) return reply.status(409).send({ error: { message: result.error, statusCode: 409 } })
    return reply.status(201).send(result)
  })

  app.get('/instructors/:id/blocked-dates', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const instructor = await InstructorService.getById(app.db, id)
    if (!instructor) return reply.status(404).send({ error: { message: 'Instructor not found', statusCode: 404 } })
    const dates = await InstructorBlockedDateService.list(app.db, id)
    return reply.send(dates)
  })

  app.delete('/instructors/:instructorId/blocked-dates/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { instructorId, id } = request.params as { instructorId: string; id: string }
    const row = await InstructorBlockedDateService.delete(app.db, id, instructorId)
    if (!row) return reply.status(404).send({ error: { message: 'Blocked date not found', statusCode: 404 } })
    return reply.send(row)
  })

  // --- Store Closures ---

  app.post('/store-closures', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const parsed = StoreClosureCreateSchema.safeParse(request.body)
    if (!parsed.success) {
      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
    }
    const result = await StoreClosureService.create(app.db, parsed.data)
    if ('error' in result) return reply.status(409).send({ error: { message: result.error, statusCode: 409 } })
    return reply.status(201).send(result)
  })

  app.get('/store-closures', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (_request, reply) => {
    const closures = await StoreClosureService.list(app.db)
    return reply.send(closures)
  })

  app.delete('/store-closures/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.admin')] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const row = await StoreClosureService.delete(app.db, id)
    if (!row) return reply.status(404).send({ error: { message: 'Store closure not found', statusCode: 404 } })
    return reply.send(row)
  })
}