/**
 *   Wechaty Chatbot SDK - https://github.com/wechaty/wechaty
 *
 *   @copyright 2016 Huan LI (李卓桓) <https://github.com/huan>, and
 *                   Wechaty Contributors <https://github.com/wechaty>.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 */
import path       from 'path'

import readPkgUp  from 'read-pkg-up'
import npm        from 'npm-programmatic'
import pkgDir     from 'pkg-dir'
import semver     from 'semver'
import inGfw      from 'in-gfw'

import {
  Puppet,
  PuppetImplementation,
  PuppetOptions,
}                         from 'wechaty-puppet'

import { looseInstanceOfClass } from './helper-functions/pure/loose-instance-of-class'

import {
  log,
}                       from './config'
import {
  PUPPET_DEPENDENCIES,
  PuppetModuleName,
}                       from './puppet-config'

export interface ResolveOptions {
  puppet         : Puppet | PuppetModuleName,
  puppetOptions? : PuppetOptions,
}

/**
 * Huan(202011):
 *  Create a `looseInstanceOfClass` to check `FileBox` and `Puppet` instances #2090
 *    https://github.com/wechaty/wechaty/issues/2090
 */
const looseInstanceOfPuppet = looseInstanceOfClass(Puppet as any as Puppet & { new (...args: any): Puppet })

export class PuppetManager {

  public static async resolve (
    options: ResolveOptions
  ): Promise<Puppet> {
    log.verbose('PuppetManager', 'resolve({puppet: %s, puppetOptions: %s})',
      options.puppet,
      JSON.stringify(options.puppetOptions),
    )

    let puppetInstance: Puppet

    /**
     * Huan(202001): (DEPRECATED) When we are developing, we might experiencing we have two version of wechaty-puppet installed,
     *  if `options.puppet` is Puppet v1, but the `Puppet` in Wechaty is v2,
     *  then options.puppet will not instanceof Puppet.
     *  So I changed here to match not a string as a workaround.
     *
     * Huan(202020): The wechaty-puppet-xxx must NOT dependencies `wechaty-puppet` so that it can be `instanceof`-ed
     *  wechaty-puppet-xxx should put `wechaty-puppet` in `devDependencies` and `peerDependencies`.
     */
    if (looseInstanceOfPuppet(options.puppet)) {
      puppetInstance = await this.resolveInstance(options.puppet)
    } else if (typeof options.puppet !== 'string') {
      log.error('PuppetManager', 'resolve() %s',
        `
        Wechaty Framework must keep only one Puppet instance #1930
        See: https://github.com/wechaty/wechaty/issues/1930
        `,
      )
      throw new Error('Wechaty Framework must keep only one Puppet instance #1930')
    } else {
      const MyPuppet = await this.resolveName(options.puppet)
      /**
       * We will meet the following error:
       *
       *  [ts] Cannot use 'new' with an expression whose type lacks a call or construct signature.
       *
       * When we have different puppet with different `constructor()` args.
       * For example: PuppetA allow `constructor()` but PuppetB requires `constructor(options)`
       *
       * SOLUTION: we enforce all the PuppetImplementation to have `options` and should not allow default parameter.
       *  Issue: https://github.com/wechaty/wechaty-puppet/issues/2
       */

      /**
       * Huan(20210313) Issue #2151 - https://github.com/wechaty/wechaty/issues/2151
       *  error TS2511: Cannot create an instance of an abstract class.
       *
       * Huan(20210530): workaround by "as any"
       */
      puppetInstance = new (MyPuppet as any)(options.puppetOptions)
    }

    return puppetInstance
  }

  protected static async resolveName (
    puppetName: PuppetModuleName,
  ): Promise<PuppetImplementation> {
    log.verbose('PuppetManager', 'resolveName(%s)', puppetName)

    if (!puppetName) {
      throw new Error('must provide a puppet name')
    }

    if (!(puppetName in PUPPET_DEPENDENCIES)) {
      throw new Error(
        [
          '',
          'puppet npm module not supported: "' + puppetName + '"',
          'learn more about supported Wechaty Puppet from our directory at',
          '<https://github.com/wechaty/wechaty-puppet/wiki/Directory>',
          '',
        ].join('\n')
      )
    }

    await this.checkModule(puppetName)

    const puppetModule = await import(puppetName)

    if (!puppetModule.default) {
      throw new Error(`Puppet(${puppetName}) has not provided the default export`)
    }

    const MyPuppet = puppetModule.default as PuppetImplementation

    return MyPuppet
  }

  protected static async checkModule (puppetName: PuppetModuleName): Promise<void> {
    log.verbose('PuppetManager', 'checkModule(%s)', puppetName)

    const versionRange = PUPPET_DEPENDENCIES[puppetName]

    /**
     * 1. Not Installed
     */
    if (!this.installed(puppetName)) {
      log.silly('PuppetManager', 'checkModule(%s) not installed.', puppetName)
      await this.install(puppetName, versionRange)
      return
    }

    const moduleVersion = this.getModuleVersion(puppetName)

    const satisfy = semver.satisfies(
      moduleVersion,
      versionRange,
    )

    /**
     * 2. Installed But Version Not Satisfy
     */
    if (!satisfy) {
      log.silly('PuppetManager', 'checkModule() %s installed version %s NOT satisfied range %s',
        puppetName,
        moduleVersion,
        versionRange,
      )
      await this.install(puppetName, versionRange)
      return
    }

    /**
     * 3. Installed and Version Satisfy
     */
    log.silly('PuppetManager', 'checkModule() %s installed version %s satisfied range %s',
      puppetName,
      moduleVersion,
      versionRange,
    )
  }

  protected static getModuleVersion (moduleName: string): string {
    const modulePath = path.dirname(
      require.resolve(
        moduleName,
      ),
    )
    const pkg     = readPkgUp.sync({ cwd: modulePath })!.packageJson
    const version = pkg.version

    return version
  }

  protected static async resolveInstance (instance: Puppet): Promise<Puppet> {
    log.verbose('PuppetManager', 'resolveInstance(%s)', instance)
    // const version = instance.version()
    // const name = instance.name()

    // const satisfy = semver.satisfies(
    //   version,
    //   puppetConfig.npm.version,
    // )

    // TODO: check the instance version to satisfy semver
    return instance
  }

  protected static installed (moduleName: string): boolean {
    try {
      require.resolve(moduleName)
      return true
    } catch (e) {
      return false
    }
  }

  private static async preInstallPuppeteer (): Promise<void> {
    let gfw = false
    try {
      gfw = await inGfw()
      if (gfw) {
        log.verbose('PuppetManager', 'preInstallPuppeteer() inGfw = true')
      }
    } catch (e) {
      log.verbose('PuppetManager', 'preInstallPuppeteer() exception: %s', e)
    }

    // https://github.com/GoogleChrome/puppeteer/issues/1597#issuecomment-351945645
    if (gfw && !process.env['PUPPETEER_DOWNLOAD_HOST']) {
      log.info('PuppetManager', 'preInstallPuppeteer() set PUPPETEER_DOWNLOAD_HOST=https://npm.taobao.org/mirrors/')
      process.env['PUPPETEER_DOWNLOAD_HOST'] = 'https://npm.taobao.org/mirrors/'
    }
  }

  public static async install (
    puppetModule: string,
    puppetVersion = 'latest',
  ): Promise<void> {
    log.info('PuppetManager', 'install(%s@%s) please wait ...', puppetModule, puppetVersion)

    if (puppetModule === 'wechaty-puppet-puppeteer') {
      await this.preInstallPuppeteer()
    }

    await npm.install(
      `${puppetModule}@${puppetVersion}`,
      {
        cwd    : await pkgDir(__dirname),
        output : true,
        save   : false,
      },
    )
    log.info('PuppetManager', 'install(%s@%s) done', puppetModule, puppetVersion)
  }

  /**
   * Install all `wechaty-puppet-*` modules from `puppet-config.ts`
   */
  public static async installAll (): Promise<void> {
    log.info('PuppetManager', 'installAll() please wait ...')

    const skipList = [
      '@juzibot/wechaty-puppet-donut',  // windows puppet
      '@juzibot/wechaty-puppet-wxwork', // wxwork puppet
    ]

    const moduleList: string[] = []

    for (const puppetModuleName of Object.keys(PUPPET_DEPENDENCIES)) {
      const version = PUPPET_DEPENDENCIES[puppetModuleName as PuppetModuleName]

      if (version === '0.0.0' || skipList.includes(puppetModuleName)) {
        continue
      }

      moduleList.push(`${puppetModuleName}@${version}`)
    }

    await npm.install(
      moduleList,
      {
        cwd    : await pkgDir(__dirname),
        output : true,
        save   : false,
      },
    )

  }

}