import { BookTaskDetailService } from '@/define/db/service/book/bookTaskDetailService'
import { BookTaskService } from '@/define/db/service/book/bookTaskService'
import { OptionRealmService } from '@/define/db/service/optionService'
import { BookService } from '@/define/db/service/book/bookService'
import { TaskListService } from '@/define/db/service/book/taskListService'
import { TaskModal } from '@/define/model/task'
import { Book } from '@/define/model/book/book'
import { getProjectPath } from '../../option/optionCommonService'
import path from 'path'
import { isEmpty } from 'lodash'
import axios from 'axios'
import { define } from '@/define/define'
import { CheckFolderExistsOrCreate, CopyFileOrFolder } from '@/define/Tools/file'
import { DownloadFile } from '@/define/Tools/common'
import { MappingTaskTypeToVideoModel } from '@/define/enum/video'
import { BookBackTaskType } from '@/define/enum/bookEnum'
import { t } from '@/i18n'

export class BookBasicHandle {
  bookTaskDetailService!: BookTaskDetailService
  bookTaskService!: BookTaskService
  optionRealmService!: OptionRealmService
  bookService!: BookService
  taskListService!: TaskListService

  constructor() {
    // 初始化
  }

  async InitBookBasicHandle() {
    // 如果 bookTaskDetailService 已经初始化，则直接返回
    if (!this.bookTaskDetailService) {
      this.bookTaskDetailService = await BookTaskDetailService.getInstance()
    }
    if (!this.bookTaskService) {
      this.bookTaskService = await BookTaskService.getInstance()
    }
    if (!this.optionRealmService) {
      this.optionRealmService = await OptionRealmService.getInstance()
    }
    if (!this.bookService) {
      this.bookService = await BookService.getInstance()
    }
    if (!this.taskListService) {
      this.taskListService = await TaskListService.getInstance()
    }
  }

  /**
   * 检查所有的服务是否都已初始化
   * @returns 
   */
  CheckInit() {
    if (this.bookTaskDetailService
      && this.bookTaskService
      && this.optionRealmService
      && this.bookService
      && this.taskListService) {
      return true
    }
    return false
  }

  /** 执行事务的方法 */
  async transaction(callback: (realm: any) => void) {
    this.CheckInit() || await this.InitBookBasicHandle()
    this.bookService.transaction(() => {
      callback(this.bookService.realm)
    })
  }

  /**
   * 下载视频文件并处理路径映射
   * 
   * 此方法负责从远程URL下载视频文件到本地，并处理文件的存储路径、转存服务等。
   * 支持多种视频来源的处理，包括MidJourney、可灵等不同平台的视频文件。
   * 会自动处理文件转存（除MJ官方CDN和可灵视频外），并更新数据库中的路径信息。
   * 
   * @param {string[]} videoUrls - 需要下载的视频URL列表
   * @param {TaskModal.Task} task - 当前执行的任务对象，包含任务类型等信息
   * @param {Book.SelectBookTaskDetail} bookTaskDetail - 小说任务详情对象，包含分镜信息
   * @param {string} preffix - 文件名前缀，用于区分不同来源的视频文件
   * 
   * @returns {Promise<{outVideoPath: string, subVideoPath: string[]}>} 返回下载结果
   * - outVideoPath: 主输出视频的本地路径（第一个视频的副本）
   * - subVideoPath: 所有子视频的路径信息数组（JSON字符串格式）
   * 
   * @throws {Error} 当服务未初始化时
   * @throws {Error} 当文件下载失败时
   * @throws {Error} 当数据库操作失败时
   * 
   * @example
   * ```typescript
   * const result = await this.DownloadVideoUrls(
   *   ['http://example.com/video1.mp4', 'http://example.com/video2.mp4'],
   *   task,
   *   bookTaskDetail,
   *   'MJ'
   * );
   * console.log('主视频路径:', result.outVideoPath);
   * console.log('所有视频路径:', result.subVideoPath);
   * ```
   * 
   * @description
   * 处理流程：
   * 1. 初始化服务并获取项目路径
   * 2. 遍历每个视频URL进行下载
   * 3. 根据任务类型决定是否使用转存服务
   * 4. 创建本地存储目录并下载文件
   * 5. 将第一个视频复制为主输出视频
   * 6. 更新数据库中的路径信息
   * 
   * @note
   * - MidJourney官方CDN (cdn.midjourney.com) 的视频不支持转存
   * - 可灵视频 (KLING_VIDEO, KLING_VIDEO_EXTEND) 不使用转存服务
   * - 转存服务需要全局machineId配置
   * - 视频文件按时间戳和索引命名以避免冲突
   */
  async DownloadVideoUrls(videoUrls: string[], task: TaskModal.Task, bookTaskDetail: Book.SelectBookTaskDetail, preffix: string, videoIds?: string[]): Promise<{ outVideoPath: string, subVideoPath: string[] }> {
    this.CheckInit() || await this.InitBookBasicHandle()

    if (videoIds != undefined && videoIds.length != videoUrls.length) {
      throw new Error(t("视频ID数量与视频链接数量不匹配"))
    }

    let bookTask = await this.bookTaskService.GetBookTaskDataById(
      bookTaskDetail.bookTaskId as string,
      true
    )

    let tempVideoUrls = bookTaskDetail.subVideoPath || []
    let newVideoUrls: string[] = []
    let outVideoPath: string = ''

    const project_path = await getProjectPath()

    // 开始下载所有视频
    for (let i = 0; i < videoUrls.length; i++) {
      const videoUrl = videoUrls[i]
      // 处理文件地址和下载
      let videoPath = path.join(
        bookTask.imageFolder as string,
        `video/subVideo/${bookTaskDetail.name}/${new Date().getTime()}_${i}.mp4`
      )

      let remoteUrl = videoUrl

      // 开始处理下载 mj 官方的图片不支持转存
      if (global.machineId
        && !isEmpty(global.machineId)
        && !videoUrl.startsWith('https://cdn.midjourney.com')
        && task.type != BookBackTaskType.KLING_VIDEO
        && task.type != BookBackTaskType.KLING_VIDEO_EXTEND
      ) {
        // 转存一下视频文件
        // 获取当前url的文件名
        let fileName = preffix + "_" + path.basename(videoUrl)
        let transferRes = await axios.post(define.lms_url + `/lms/FileUpload/UrlUpload/${global.machineId}`, {
          url: videoUrl,
          fileName: fileName
        })
        if (transferRes.status == 200 && transferRes.data.code == 1) {
          remoteUrl = transferRes.data.data.url
        }
      }

      if (isEmpty(remoteUrl)) {
        remoteUrl = videoUrl
      }

      await CheckFolderExistsOrCreate(path.dirname(videoPath))
      await DownloadFile(remoteUrl, videoPath)

      // 处理返回数据信息
      // 开始修改信息
      // 将信息添加到里面
      let a = {
        localPath: path.relative(project_path, videoPath),
        remotePath: remoteUrl,
        taskId: bookTaskDetail.videoMessage?.taskId,
        videoId: videoIds != undefined && videoIds[i] ? videoIds[i] : "",
        index: i,
        type: MappingTaskTypeToVideoModel(task.type as string)
      }
      newVideoUrls.push(JSON.stringify(a))
      if (i == 0) {
        outVideoPath = path.join(
          bookTask.imageFolder as string,
          'video',
          bookTaskDetail.name + path.extname(videoPath)
        )
        await CopyFileOrFolder(videoPath, outVideoPath as string)
      }
    }

    // 开始处理数据
    // 将原有的视频路径合并到新数组中
    newVideoUrls.push(...tempVideoUrls)
    await this.bookTaskDetailService.ModifyBookTaskDetailById(bookTaskDetail.id as string, {
      subVideoPath: newVideoUrls,
      generateVideoPath: outVideoPath != '' ? outVideoPath : ''
    })

    return {
      outVideoPath: outVideoPath,
      subVideoPath: newVideoUrls
    }
  }
}