import type { FastifyPluginAsync } from 'fastify'
import multipart from '@fastify/multipart'
import { FileService } from '../../services/file.service.js'

export const fileRoutes: FastifyPluginAsync = async (app) => {
  await app.register(multipart, {
    limits: {
      fileSize: 25 * 1024 * 1024, // 25 MB max
      files: 1,
    },
  })

  // List files for an entity
  app.get('/files', { preHandler: [app.authenticate] }, async (request, reply) => {
    const { entityType, entityId } = request.query as { entityType?: string; entityId?: string }
    if (!entityType || !entityId) {
      return reply.status(400).send({
        error: { message: 'entityType and entityId query params required', statusCode: 400 },
      })
    }

    const fileRecords = await FileService.listByEntity(app.db, request.companyId, entityType, entityId)
    const data = await Promise.all(
      fileRecords.map(async (f) => ({ ...f, url: await app.storage.getUrl(f.path) })),
    )
    return reply.send({ data })
  })

  // Upload a file
  app.post('/files', { preHandler: [app.authenticate] }, async (request, reply) => {
    const data = await request.file()
    if (!data) {
      return reply.status(400).send({ error: { message: 'No file provided', statusCode: 400 } })
    }

    const entityType = (data.fields.entityType as { value?: string })?.value
    const entityId = (data.fields.entityId as { value?: string })?.value
    const category = (data.fields.category as { value?: string })?.value

    if (!entityType || !entityId || !category) {
      return reply.status(400).send({
        error: { message: 'entityType, entityId, and category are required', statusCode: 400 },
      })
    }

    const buffer = await data.toBuffer()

    try {
      const file = await FileService.upload(app.db, app.storage, request.companyId, {
        data: buffer,
        filename: data.filename,
        contentType: data.mimetype,
        entityType,
        entityId,
        category,
        uploadedBy: request.user.id,
      })
      const url = await app.storage.getUrl(file.path)
      return reply.status(201).send({ ...file, url })
    } catch (err) {
      if (err instanceof Error && (err.message.includes('not allowed') || err.message.includes('too large') || err.message.includes('Maximum'))) {
        return reply.status(400).send({ error: { message: err.message, statusCode: 400 } })
      }
      throw err
    }
  })

  // Serve file content (for local provider)
  app.get('/files/serve/*', { preHandler: [app.authenticate] }, async (request, reply) => {
    const filePath = (request.params as { '*': string })['*']
    if (!filePath) {
      return reply.status(400).send({ error: { message: 'Path required', statusCode: 400 } })
    }

    try {
      const data = await app.storage.get(filePath)
      const ext = filePath.split('.').pop()?.toLowerCase()
      const contentTypeMap: Record<string, string> = {
        jpg: 'image/jpeg', jpeg: 'image/jpeg', png: 'image/png', webp: 'image/webp', pdf: 'application/pdf',
      }
      return reply
        .header('Content-Type', contentTypeMap[ext ?? ''] ?? 'application/octet-stream')
        .header('Cache-Control', 'private, max-age=3600')
        .send(data)
    } catch {
      return reply.status(404).send({ error: { message: 'File not found', statusCode: 404 } })
    }
  })

  // Get file metadata
  app.get('/files/:id', { preHandler: [app.authenticate] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const file = await FileService.getById(app.db, request.companyId, id)
    if (!file) return reply.status(404).send({ error: { message: 'File not found', statusCode: 404 } })
    const url = await app.storage.getUrl(file.path)
    return reply.send({ ...file, url })
  })

  // Delete a file
  app.delete('/files/:id', { preHandler: [app.authenticate] }, async (request, reply) => {
    const { id } = request.params as { id: string }
    const file = await FileService.delete(app.db, app.storage, request.companyId, id)
    if (!file) return reply.status(404).send({ error: { message: 'File not found', statusCode: 404 } })
    return reply.send(file)
  })
}