import Realm, { UpdateMode } from 'realm'
import { BookModel } from '../../model/Book/book.js'
import path from 'path'
import { define } from '../../../define'
import { BookImageCategory, BookTaskStatus, BookType } from '../../../enum/bookEnum.js'
import { successMessage } from '../../../../main/Public/generalTools'
import { CheckFolderExistsOrCreate, CopyFileOrFolder } from '../../../Tools/file'
const { v4: uuidv4 } = require('uuid')
import { BaseRealmService } from './bookBasic.js'
import { isEmpty } from 'lodash'
import { FfmpegOptions } from '../../../../main/Service/ffmpegOptions.js'
import { version } from '../../../../../package.json'
import { Book } from '../../../../model/book/book.js'
import { GeneralResponse } from '../../../../model/generalResponse.js'
import { ImageToVideoModels } from '@/define/enum/video.js'

export class BookService extends BaseRealmService {
  static instance: BookService | null = null
  realm: Realm

  private constructor() {
    super()
  }

  /**
   * 获取当前实例对象，为空则创建一个新的
   * @returns
   */
  public static async getInstance() {
    if (BookService.instance === null) {
      BookService.instance = new BookService()
      await super.getInstance()
    }
    await BookService.instance.open()
    return BookService.instance
  }

  /**
   * 获取小说信息，没有找到返回null
   * @param bookId
   */
  GetBookDataById(bookId: string): Book.SelectBook | null {
    try {
      if (isEmpty(bookId)) {
        throw new Error('获取小说信息失败，缺少小说ID')
      }
      let books = this.realm.objects<BookModel>('Book').filtered('id = $0', bookId)
      if (books.length <= 0) {
        return null
      } else {
        // 对返回的数据进行处理
        let resBooks = Array.from(books).map((book) => {
          // 这里可以直接操作普通对象
          let bookObj = {
            ...book,
            bookFolderPath: path.resolve(
              define.project_path,
              book.bookFolderPath.replace(/\\/g, '/')
            ),
            oldVideoPath: book.oldVideoPath
              ? path.resolve(define.project_path, book.oldVideoPath.replace(/\\/g, '/'))
              : '',
            imageFolder: book.imageFolder
              ? path.resolve(define.project_path, book.imageFolder.replace(/\\/g, '/'))
              : ''
          }
          return bookObj
        })
        return resBooks[0]
      }
    } catch (error) {
      throw error
    }
  }

  /**
   * 获取小说信息，通过参数查询
   * @returns
   */
  GetBookData(bookQuery) {
    try {
      // 获取所有的小说数据，并进行时间降序排序
      let books = this.realm.objects<BookModel>('Book')
      let book_length = books.length

      // 开始开始筛选
      if (bookQuery.bookId) {
        // 查询对应的小说ID的数据
        books = books.filtered('id = $0', bookQuery.bookId)
      }

      books = books.sorted('updateTime', true)
      // 判断是不是有page和pageSize，有的话对查询返回的信息做分页
      if (bookQuery.page && bookQuery.pageSize) {
        books = books.slice(
          (bookQuery.page - 1) * bookQuery.pageSize,
          bookQuery.page * bookQuery.pageSize
        ) as unknown as Realm.Results<BookModel>
      }
      if (books.length <= 0) {
        return successMessage(
          {
            res_book: [],
            book_length: 0
          },
          '没有数据',
          'ReverseBook_GetBookData'
        )
      }

      // 将realm对象数组转换为普通对象数组
      let res_book = Array.from(books).map((book) => {
        // 这里可以直接操作普通对象
        let bookObj = {
          ...book,
          bookFolderPath: path.resolve(
            define.project_path,
            book.bookFolderPath.replace(/\\/g, '/')
          ),
          oldVideoPath: book.oldVideoPath
            ? path.resolve(define.project_path, book.oldVideoPath.replace(/\\/g, '/'))
            : '',
          imageFolder: book.imageFolder
            ? path.resolve(define.project_path, book.imageFolder.replace(/\\/g, '/'))
            : '',
          imageStyle: book.imageStyle ? Array.from(book.imageStyle) : [],
          customizeImageStyle: book.customizeImageStyle ? Array.from(book.imageStyle) : [],
        } as Book.SelectBook
        return bookObj
      })

      return successMessage(
        {
          res_book,
          book_length
        },
        '获取成功',
        'ReverseBook_GetBookData'
      )
    } catch (error) {
      throw error
    }
  }

  /**
   * 新增或者是修小说数据
   * @param {*} book 小说信息
   * @returns
   */
  async AddOrModifyBook(book) {
    try {
      if (book == null) {
        throw new Error('小说数据为空，无法修改')
      }

      // 当小说的类型是反推的时候，必须传入视频
      if (book.type == BookType.MJ_REVERSE || book.type == BookType.SD_REVERSE) {
        // 判断视频是否存在
        if (book.oldVideoPath == null || book.oldVideoPath == '') {
          throw new Error('反推必须传入视频')
        }
      }

      if (book.id == null) {
        // 新增
        // 判断指定的名字在数据库中是否存在
        let books = this.realm.objects('Book').filtered('name = $0', book.name)
        if (books.length > 0) {
          throw new Error(`小说名字 ${book.name} 已经存在，请更换小说名字`)
        }
        console.log(this)
        // 新增数据
        book.id = uuidv4()
        book.createTime = new Date()
        book.updateTime = new Date()
        // 检查传入的视频文件是不是存在
        // 获取当前最大的no
        let maxNo = this.realm.objects('Book').max('no')
        book.no = maxNo == null ? 1 : Number(maxNo) + 1
        // 拼接项目文件夹
        book.bookFolderPath = book.id
        book.imageFolder = `${book.id}/tmp`
        let bookFolderPath = path.resolve(define.project_path, book.id)
        let imageFolder = path.resolve(define.project_path, `${book.id}/tmp`)
        let oldVideoPath = path.resolve(define.project_path, `${book.id}/data/${book.id}.mp4`)
        let bookTaskImageFolder = path.resolve(imageFolder, 'output_00001')

        // 将视频拷贝一个到项目文件下面
        if (book.oldVideoPath) {
          await CopyFileOrFolder(book.oldVideoPath, oldVideoPath)
        }

        // 创建对应的文件夹
        await CheckFolderExistsOrCreate(bookFolderPath)
        await CheckFolderExistsOrCreate(imageFolder)
        await CheckFolderExistsOrCreate(bookTaskImageFolder) // 创建默认的任务文件夹
        // 修改数据
        book.oldVideoPath = path.relative(define.project_path, oldVideoPath)
        if (book.type == BookType.ORIGINAL) {
          book.oldVideoPath = null
        }

        let imageCategory = BookImageCategory.MJ
        if (book.type == BookType.SD_REVERSE) {
          imageCategory = BookImageCategory.SD
        } else if (book.type == BookType.MJ_REVERSE) {
          imageCategory = BookImageCategory.MJ
        } else if (book.type == BookType.ORIGINAL) {
          imageCategory = global.config.defaultImageMode ?? BookImageCategory.MJ
        } else {
          throw new Error('未知的小说类型')
        }

        let videoCategory = ImageToVideoModels.MJ_VIDEO;

        this.realm.write(() => {
          book.version = version
          this.realm.create('Book', book)

          // 添加一个任务
          let bookTask = {
            id: uuidv4(),
            bookId: book.id,
            no: 1,
            name: 'output_00001',
            generateVideoPath: null,
            srtPath: null,
            audioPath: null,
            imageFolder: path.relative(define.project_path, bookTaskImageFolder), // 获取文件输出对于项目的相对路径
            styleList: [],
            prefix: null,
            status: BookTaskStatus.WAIT,
            errorMsg: null,
            isAuto: false,
            updateTime: new Date(),
            createTime: new Date(),
            version: version,
            imageCategory: imageCategory,
            videoCategory: videoCategory,
            openVideoGenerate: false
          }

          // 添加任务
          this.realm.create('BookTask', bookTask)
        })

        // 保存成功，返回数据，但是要做处理
        book.bookFolderPath = bookFolderPath
        book.imageFolder = imageFolder
        book.oldVideoPath = oldVideoPath

        return successMessage(book, '新增成功', 'BookBasic_AddOrModifyBook')
      } else {
        // 修改
        // 判断指定的名字在数据库中是否存在（不算自己）
        let books = this.realm
          .objects('Book')
          .filtered('name = $0 AND id != $1', book.name, book.id)
        if (books.length > 0) {
          throw new Error(`小说名字 ${book.name} 已经存在，请更换小说名字`)
        }
        // 两个文件夹地址不能改，删除两个属性
        delete book.bookFolderPath
        delete book.imageFolder
        // 修改数据
        book.updateTime = new Date()
        this.transaction(() => {
          this.realm.create('Book', book, UpdateMode.Modified)
        })

        // 保存成功，返回数据，但是要做处理
        return successMessage(null, '修改成功', 'BookBasic_AddOrModifyBook')
      }
    } catch (error) {
      throw error
    }
  }

  /**
   * 修改小说数据
   * @param bookId 小说的ID
   * @param bookData 要修改的小说数据
   */
  UpdateBookData(bookId: string, bookData: Book.SelectBook): Book.SelectBook {
    try {
      if (bookId == null) {
        throw new Error('修改小说数据失败，缺少小说ID')
      }
      if (bookData == null) {
        throw new Error('修改小说数据失败，缺少小说数据')
      }

      // 检查小说ID对应的数据是不是存在
      let bookRes = this.GetBookDataById(bookId)
      if (bookRes == null) {
        throw new Error('修改小说数据失败，小说ID对应的数据不存在')
      }

      if (bookData && bookData.id) {
        delete bookData.id
      }

      // 开始修改
      this.transaction(() => {
        this.realm.create('Book', { id: bookId, ...bookData }, UpdateMode.Modified)
      })

      bookRes = this.GetBookDataById(bookId)
      if (bookRes == null) {
        throw new Error('获取修改后的小说数据失败，小说ID对应的数据不存在')
      }
      // return successMessage(bookRes, '修改小说数据成功', 'ReverseBook_UpdateBookData')
      return bookRes;
    } catch (error) {
      throw error
    }
  }

  /**
   * 删除指定的小说任务
   * @param bookId 需要删除的小说的ID
   */
  DeleteBookData(bookId: string): void {
    try {
      this.transaction(() => {
        let book = this.realm.objectForPrimaryKey('Book', bookId);
        if (book == null) {
          throw new Error('未找到对应的小说')
        }
        // 删除对应的小说
        this.realm.delete(book)
      })
    } catch (error) {
      throw error
    }
  }
}