import { Context } from '@midwayjs/koa';
import { join, sep } from 'path';
import { FileService } from '../service/File.service';
import { createReadStream } from 'fs';
import { Controller, Inject, Config, Post, Files, Fields, Get } from '@midwayjs/core';
import * as mime from 'mime-types';
/**文件上传默认类 */
@Controller('/files', { ignoreGlobalPrefix: true })
export class FileController {
  @Inject()
  ctx: Context;
  @Inject()
  fileService: FileService;
  @Config('upload.realdir')
  uploadDir;

  /**
   * 文件上传
   * @param {Array} files 文件数组
   * @param {object} fields 其他字段
   * @param {string} project 项目名
   * @param {string} catalog 文件层级名 用'_'连接上下层级
   * @param {string} item 文件名,没有默认用时间戳
   */
  @Post('/:project/upload')
  @Post('/:project/:catalog/upload')
  @Post('/:project/:catalog/:item/upload')
  async upload(@Files() files, @Fields() fields) {
    const { project, catalog, item } = this.ctx.params;
    const dirs = [project];
    if (catalog && catalog !== '_') {
      const subs = catalog.split('_');
      dirs.push(...subs);
    }
    let path = this.uploadDir;
    // 检查分级目录是否存在，不存在则创建
    for (let i = 0; i < dirs.length; i++) {
      const p = `${path}${sep}${dirs.slice(0, i + 1).join(sep)}`;
      this.fileService.mkdir(p);
    }
    path = `${join(path, dirs.join(sep))}${sep}`;
    const file = files[0];
    const ext = this.fileService.getExt(file.filename);
    let filename = `${this.fileService.getNowDateTime()}${ext}`;
    if (item) filename = item;
    const uri = `/files/${dirs.join('/')}/${filename}`;
    this.fileService.moveFile(file.data, `${path}${filename}`);
    return { id: filename, name: filename, uri, errcode: 0 };
  }

  /**
   * 读取文件
   */
  @Get('/*')
  async readFile() {
    const shortRealPath = this.fileService.getFileShortRealPath();
    const realPath = join(this.uploadDir, shortRealPath);
    this.ctx.body = createReadStream(realPath);
    const type = mime.lookup(realPath);
    this.ctx.response.set('content-type', type);
  }
  @Post('/clear/files')
  async clearFiles() {
    try {
      // 先重写文件地址表
      const modelResults = this.fileService.scanModelHaveFile();
      await this.fileService.setFileUriFromDefaultDataBase(modelResults);
      // 再清除未使用的上传文件
      await this.fileService.deleteNoUseFile();
    } catch (error) {
      console.error(error);
    }
    return 'ok';
  }
}