import { FastifyRequest, FastifyReply, FastifyInstance } from 'fastify'
import { RecordsService } from '../services/records.service'
import { FileService } from '../services/file.service'
import {
  ListRecordsQuery,
  CreateRecordsBody,
  UpdateRecordsBody
} from '../dto/records.dto'

export class RecordsController {
  private recordsService: RecordsService
  private fileService: FileService

  constructor(app: FastifyInstance) {
    this.recordsService = new RecordsService(app)
    this.fileService = new FileService(app)
  }

  /**
   * 上传文件并创建记录
   */
  async uploadAndCreate(request: FastifyRequest, reply: FastifyReply) {
    try {
      const data = await request.file()
      
      if (!data) {
        return reply.code(400).send({ message: '请选择要上传的文件' })
      }

      const buffer = await data.toBuffer()
      const filename = data.filename
      const mimeType = data.mimetype
      
      // 从表单字段中获取描述
      const description = (data.fields?.description as any)?.value || ''

      // 上传文件到OSS
      const uploadResult = await this.fileService.uploadFile(buffer, filename, mimeType, {
        folder: 'tweb',
        maxSize: 50 * 1024 * 1024 // 50MB
      })

      // 创建记录
      const record = await this.recordsService.create(uploadResult.url, description)

      return reply.code(201).send({
        message: '文件上传并创建记录成功',
        data: {
          record: {
            id: record.id,
            url: record.url,
            description: record.description,
            createdAt: record.createdAt,
            updatedAt: record.updatedAt
          },
          file: {
            filename: filename,
            originalName: filename,
            url: uploadResult.url,
            key: uploadResult.key,
            size: uploadResult.size,
            mimeType: uploadResult.mimeType,
            dateFolder: new Date().toISOString().split('T')[0]
          }
        }
      })
    } catch (error) {
      return reply.code(500).send({
        message: '文件上传并创建记录失败',
        error: error instanceof Error ? error.message : '未知错误'
      })
    }
  }

  async create(request: FastifyRequest<{ Body: CreateRecordsBody }>, reply: FastifyReply) {
    try {
      const { url, description } = request.body

      if (!url || !description) {
        return reply.code(400).send({ message: 'URL和描述不能为空' })
      }

      const record = await this.recordsService.create(url, description)

      return reply.code(201).send({
        record: {
          id: record.id,
          url: record.url,
          description: record.description,
          createdAt: record.createdAt,
          updatedAt: record.updatedAt
        }
      })
    } catch (error) {
      return reply.code(500).send(error)
    }
  }

  async list(request: FastifyRequest<{ Querystring: ListRecordsQuery }>, reply: FastifyReply) {
    try {
      const { page, size, url, description } = request.query

      const result = await this.recordsService.findAll(page, size, url, description)

      return reply.send(result)
    } catch (error) {
      return reply.code(500).send(error)
    }
  }

  async getById(request: FastifyRequest<{ Params: { id: string } }>, reply: FastifyReply) {
    try {
      const id = parseInt(request.params.id)
      
      if (isNaN(id)) {
        return reply.code(400).send({ message: '无效的ID' })
      }

      const record = await this.recordsService.findById(id)

      return reply.send({
        record: {
          id: record.id,
          url: record.url,
          description: record.description,
          createdAt: record.createdAt,
          updatedAt: record.updatedAt
        }
      })
    } catch (error) {
      if (error && typeof error === 'object' && 'name' in error && error.name === 'EntityNotFoundError') {
        return reply.code(404).send({ message: '记录不存在' })
      }
      return reply.code(500).send(error)
    }
  }

  async update(request: FastifyRequest<{ Body: UpdateRecordsBody }>, reply: FastifyReply) {
    try {
      const { id, url, description } = request.body

      if (!id) {
        return reply.code(400).send({ message: 'ID不能为空' })
      }

      try {
        await this.recordsService.findById(id)
      } catch (error) {
        return reply.code(404).send({ message: '记录不存在' })
      }

      const updatedRecord = await this.recordsService.updateRecord(id, { url, description })

      return reply.send({
        record: {
          id: updatedRecord.id,
          url: updatedRecord.url,
          description: updatedRecord.description,
          createdAt: updatedRecord.createdAt,
          updatedAt: updatedRecord.updatedAt
        }
      })
    } catch (error) {
      return reply.code(500).send(error)
    }
  }

  async delete(request: FastifyRequest<{ Params: { id: string } }>, reply: FastifyReply) {
    try {
      const id = parseInt(request.params.id)
      
      if (isNaN(id)) {
        return reply.code(400).send({ message: '无效的ID' })
      }

      try {
        await this.recordsService.findById(id)
      } catch (error) {
        return reply.code(404).send({ message: '记录不存在' })
      }

      await this.recordsService.deleteRecord(id)

      return reply.send({ message: '记录删除成功' })
    } catch (error) {
      return reply.code(500).send(error)
    }
  }
}