/**
 * 控制器基类
 * @author yutent<yutent.io@gmail.com>
 * @date 2020/09/24 15:45:17
 */

export default class Controller {
  #auth = null

  get method() {
    return this.request.method
  }

  get host() {
    return this.request.host
  }

  get hostname() {
    return this.request.hostname
  }

  get ua() {
    return this.request.headers['user-agent']
  }

  get jwt() {
    return {
      result: this.#auth,
      sign: data => {
        let { __mix_key__ } = this.request
        return this.context.$$jwt.sign(data, __mix_key__)
      },
      verify: token => {
        this.#auth = null
        let { __mix_key__ } = this.request
        token ??= this.request.header('authorization')

        if (token) {
          this.#auth = this.context.$$jwt.verify(token, __mix_key__)
        }
        return this.#auth
      }
    }
  }

  // 定义一个模板变量
  assign(key, val) {
    if (this.context.$$views) {
      if (val === undefined || val === null) {
        val = ''
      }
      key += ''

      if (key) {
        this.context.$$views.assign(key, val)
      }
    } else {
      throw new Error('Views module not installed.')
    }
  }

  // 模板渲染, 参数是模板名, 可不带后缀, 默认是
  render(file, noParse = false) {
    if (this.context.$$views) {
      this.context.$$views
        .render(file, noParse)
        .then(html => {
          this.response.render(html)
        })
        .catch(err => {
          this.response.error(err)
        })
    } else {
      throw new Error('Views module not installed.')
    }
  }

  // cookie读写
  cookie(key, val, opt) {
    if (arguments.length === 1) {
      return this.request.cookie(key)
    }

    if (!opt) {
      opt = {}
    }
    opt.domain = opt.domain || this.context.get('domain')

    if (val === null || val === undefined) {
      delete opt.expires
      opt.maxAge = -1
    }

    this.response.cookie(key, val, opt)
  }

  // 会话读写, 返回的是Promise对象
  session(key, val) {
    let { ssid } = this.request
    if (this.context.$$session) {
      key += ''

      if (arguments.length < 2) {
        // 这里返回的是Promise对象
        return this.context.$$session.get(ssid, key)
      }
      this.context.$$session.set(ssid, key, val)
    } else {
      throw new Error('Session was disabled.')
    }
  }
}