import CryptoJS from 'crypto-js'
import moment from 'moment'

const VERSION = 1 // 当前配置文件版本
const ALLOW_LOW_VERSION = 1 // 最小支持的配置文件版本号
const APPNAME = 'Sun-Panel-Config'

export class FormatError extends Error {
  constructor(message: string) {
    super(message)
    this.name = 'FormatError'
  }
}

export class ConfigVersionLowError extends Error {
  constructor(message: string) {
    super(message)
    this.name = 'ConfigVersionLowError'
  }
}

export interface JsonStructure {
  version: number
  appName: 'Sun-Panel-Config'
  exportTime: string
  appVersion: string
  icons?: any
  // styleConfig: Panel.panelConfig
  md5: string
}

// 图标
export interface Icon {
  title: string
  sort: number
  icon: Panel.ItemIcon | null
  url: string
  lanUrl: string
  description: string
  openMethod: number
}

// 图标组
export interface IconGroup {
  title: string
  sort: number
  children: Icon[]
}

interface ExportJsonResult {
  addIconsData(datas: IconGroup[]): ExportJsonResult
  exportFile(): void
  string(): string
}

// 导出数据
export function exportJson(appVersion?: string): ExportJsonResult {
  const jsonData: JsonStructure = {
    version: VERSION,
    appName: APPNAME,
    exportTime: moment().format('YYYY-MM-DD HH:mm:ss'),
    appVersion: appVersion || '',
    md5: '',
  }

  // MD5 生成函数
  function generateMD5AndUpdate() {
    jsonData.md5 = generateMD5(JSON.stringify(jsonData))
  }

  return {
    // 添加图标信息
    addIconsData(datas: IconGroup[]) {
      jsonData.icons = datas
      return this
    },

    // 导出json文件
    exportFile() {
      generateMD5AndUpdate()
      const jsonString = JSON.stringify(jsonData)
      if (jsonString) {
        const blob = new Blob([jsonString], { type: 'application/json' })
        const link = document.createElement('a')
        link.href = URL.createObjectURL(blob)
        link.download = `SunPanel-Data${moment().format('YYYYMMDDHHmm')}.sun-panel.json`
        link.click()
      }
    },

    // 返回字符串
    string() {
      generateMD5AndUpdate()
      return JSON.stringify(jsonData)
    },
  }
}

export interface ImportJsonResult {
  isPassCheckMd5: () => boolean
  isPassCheckConfigVersionOld: () => boolean // 配置（数据）的版本是否过旧
  isPassCheckConfigVersionNew: () => boolean // 配置（数据）的版本是否过新
  isPassCheckConfigVersionBest: () => boolean // 验证程序的导入版本驱动是否为最佳 当配置文件和驱动版本相等的时候为最佳,否则不匹配过新或者过旧
  jsonStruct: JsonStructure // 根据实际情况提供更具体的类型定义
  hasProperty: (key: string) => boolean
  geticons: () => IconGroup[] // 根据实际情况提供更具体的类型定义
}

// 导入json数据
export function importJsonString(jsonString: string): ImportJsonResult | null {
  let data: any
  try {
    data = JSON.parse(jsonString)
  }
  catch (error) {
    throw new FormatError('file format error')
    return null
  }

  const jsonStruct = transformJson(data)
  const md5 = generateMD5(jsonString)

  if (!jsonStruct) {
    throw new FormatError('file format error')
    return null
  }

  if (data.version < ALLOW_LOW_VERSION)
    throw new ConfigVersionLowError('')

  return {
    isPassCheckMd5: () => md5 === jsonStruct.md5,
    isPassCheckConfigVersionOld: () => !(jsonStruct.version < VERSION),
    isPassCheckConfigVersionNew: () => !(jsonStruct.version > VERSION),
    isPassCheckConfigVersionBest: () => jsonStruct.version === VERSION,
    jsonStruct,
    hasProperty: (key: string): boolean => {
      return key in jsonStruct
    },
    geticons: (): IconGroup[] => {
      return jsonStruct.icons || []
    },
  }
}

function transformJson(jsonData: any): JsonStructure | null {
  // 检查必须存在的键
  const requiredKeys: Array<keyof JsonStructure> = ['version', 'appName', 'exportTime', 'appVersion', 'md5']
  for (const key of requiredKeys) {
    if (!(key in jsonData))
      return null
  }

  // 使用类型断言将 JSON 数据转换为指定类型
  const transformedData: JsonStructure = jsonData as JsonStructure

  // 返回转换后的数据
  return transformedData
}

function generateMD5(jsonString: string): string {
  try {
    // 解析 JSON 字符串
    const data: any = JSON.parse(jsonString)
    // 移除 md5 字段及其对应的值
    removeMD5Field(data)
    // 将修改后的 JSON 对象转换回字符串
    const modifiedJsonString = JSON.stringify(data)
    // 使用 crypto-js 计算 MD5 值
    const md5 = CryptoJS.MD5(modifiedJsonString).toString()
    return md5
  }
  catch (error) {
    return ''
  }
}

function removeMD5Field(obj: any): void {
  for (const key in obj) {
    if (key === 'md5') {
      // 移除 md5 字段
      delete obj[key]
      return
    }
  }
}