import {
  Controller, Post, Get, Delete, Param, Query,
  UseInterceptors, UploadedFile, Body,
  HttpException, HttpStatus,
} from '@nestjs/common'
import { FileInterceptor } from '@nestjs/platform-express'
import { diskStorage } from 'multer'
import { extname, join } from 'path'
import * as fs from 'fs'
import { randomUUID } from 'crypto'
import { InterviewReviewService } from './interview-review.service'
import { CurrentUser } from '../../common/decorators/current-user.decorator'

const UPLOAD_DIR = join(process.cwd(), 'uploads', 'reviews')

if (!fs.existsSync(UPLOAD_DIR)) {
  fs.mkdirSync(UPLOAD_DIR, { recursive: true })
}

@Controller('interview-review')
export class InterviewReviewController {
  constructor(private service: InterviewReviewService) {}

  /** Upload audio file + metadata */
  @Post()
  @UseInterceptors(FileInterceptor('file', {
    storage: diskStorage({
      destination: (_req, _file, cb) => cb(null, UPLOAD_DIR),
      filename: (_req, file, cb) => {
        const name = randomUUID() + extname(file.originalname || '.mp3')
        cb(null, name)
      },
    }),
    limits: { fileSize: 50 * 1024 * 1024 },
    fileFilter: (_req, file, cb) => {
      const allowed = /\.(mp3|m4a|wav|aac|ogg|mp4|webm)$/i
      if (allowed.test(extname(file.originalname))) {
        cb(null, true)
      } else {
        cb(new HttpException('仅支持 mp3/m4a/wav/aac/ogg 格式', HttpStatus.BAD_REQUEST), false)
      }
    },
  }))
  async uploadFile(
    @UploadedFile() file: any,
    @Body('position') position: string,
    @Body('company') company: string,
    @CurrentUser('userId') userId: string,
  ) {
    if (!file) {
      throw new HttpException('请上传录音文件', HttpStatus.BAD_REQUEST)
    }
    if (!position || !position.trim()) {
      throw new HttpException('请填写面试岗位', HttpStatus.BAD_REQUEST)
    }
    return this.service.create(userId, position.trim(), company?.trim(), file)
  }

  /** Submit text transcript directly (no audio) */
  @Post('text')
  async submitText(
    @Body('position') position: string,
    @Body('company') company: string,
    @Body('text') text: string,
    @CurrentUser('userId') userId: string,
  ) {
    if (!position || !position.trim()) {
      throw new HttpException('请填写面试岗位', HttpStatus.BAD_REQUEST)
    }
    if (!text || !text.trim()) {
      throw new HttpException('请填写面试转录文本', HttpStatus.BAD_REQUEST)
    }
    return this.service.createFromText(userId, position.trim(), text.trim(), company?.trim())
  }

  @Get('list')
  async list(
    @Query('page') page: string,
    @Query('limit') limit: string,
    @CurrentUser('userId') userId: string,
  ) {
    return this.service.listByUser(userId, parseInt(page) || 1, parseInt(limit) || 20)
  }

  @Get(':id')
  async getDetail(
    @Param('id') id: string,
    @CurrentUser('userId') userId: string,
  ) {
    return this.service.getDetail(id, userId)
  }

  @Delete(':id')
  async delete(
    @Param('id') id: string,
    @CurrentUser('userId') userId: string,
  ) {
    return this.service.delete(id, userId)
  }
}