const pages = {
    home: '/pages/index/index',
    adjust: '/pages/adjust/index',
    detail:'/pages/detail/index',
    auth:'/pages/auth/index',
    search:'/pages/search/index',
    projectlist:'/pages/projectlist/index',
    usercenter:'/pages/usercenter/index',
    feedback:'/pages/feedback/index',
    spacelist:'/pages/spacelist/index',
    search:'/pages/search/index',
    adjustlog:'/pages/adjustlog/index',
    spacelog:'/pages/spacelog/index',
    ipdauth:'/pages/ipdauth/index'
  }

  function to(page, data) {
    if (!pages[page]) { throw new Error(`${page} is not exist!`) }
    const _result = []
    for (const key in data) {
      const value = data[key]
      if (['', undefined, null].includes(value)) {
        continue
      }
      if (value.constructor === Array) {
        value.forEach(_value => {
          _result.push(encodeURIComponent(key) + '[]=' + encodeURIComponent(_value))
        })
      } else {
        _result.push(encodeURIComponent(key) + '=' + encodeURIComponent(value))
      }
    }
    const url = pages[page] + (_result.length ? `?${_result.join('&')}` : '')
    return url
  }

  class Router {
    push(page, param = {}, events = {}, callback = () => {}) {
      wx.navigateTo({
        url: to(page, param),
        events,
        success: callback
      })
    }

    pop(delta) {
      wx.navigateBack({ delta })
    }

    redirectTo(page, param) {
      wx.redirectTo({ url: to(page, param) })
    }

    reLaunch() {
      wx.reLaunch({ url: pages.home })
    }

    toHome() {
      this.reLaunch()
      // if (getCurrentPages().length > 1) { this.pop() } else { this.reLaunch() }
    }
  }

  export default new Router()