import bundleManager from '@ohos.bundle.bundleManager'
import request from '@ohos.request'
import common from '@ohos.app.ability.common'
import { HttpClient } from '../core/HttpClient'
import type { AppVersionInfo, RnBundleInfo } from '../core/Types'
import { SDKContext } from '../core/SDKContext'

export interface AppUpdateResult {
  hasUpdate: boolean
  info?: AppVersionInfo
}

export interface RnUpdateResult {
  hasUpdate: boolean
  info?: RnBundleInfo
}

export class UpdateSDK {
  static async checkAppUpdate(appKey: string): Promise<AppUpdateResult> {
    const bundleInfo = bundleManager.getBundleInfoForSelfSync(
      bundleManager.BundleFlag.GET_BUNDLE_INFO_DEFAULT
    )
    const currentVersionCode = bundleInfo.versionCode

    const data = await HttpClient.get<AppVersionInfo>(
      `/api/v1/updates/app/check?appKey=${appKey}&versionCode=${currentVersionCode}&platform=harmony`
    )

    if (data.latestVersionCode <= currentVersionCode) {
      return { hasUpdate: false }
    }
    return { hasUpdate: true, info: data }
  }

  static async checkRnUpdate(
    appKey: string,
    bundleName: string,
    currentBundleVersion: number
  ): Promise<RnUpdateResult> {
    const data = await HttpClient.get<RnBundleInfo>(
      `/api/v1/rn/update/check?appKey=${appKey}&bundleName=${bundleName}&bundleVersion=${currentBundleVersion}`
    )

    if (data.bundleVersion <= currentBundleVersion) {
      return { hasUpdate: false }
    }
    return { hasUpdate: true, info: data }
  }

  static async downloadRnBundle(
    context: common.UIAbilityContext,
    downloadUrl: string,
    destFilename: string
  ): Promise<string> {
    const destPath = context.cacheDir + '/' + destFilename
    await new Promise<void>((resolve, reject) => {
      request.downloadFile(context, {
        url: downloadUrl,
        filePath: destPath,
      }, (err, task) => {
        if (err) { reject(err); return }
        task.on('complete', resolve)
        task.on('fail', (error: number) => reject(new Error(`Download failed: ${error}`)))
      })
    })
    if (SDKContext.getConfig().debug) {
      console.log('[UpdateSDK] RN bundle downloaded to', destPath)
    }
    return destPath
  }
}