// 参考文档：https://developers.weixin.qq.com/miniprogram/dev/wxcloud/guide/database/permission.html

const app = getApp()

const sliderWidth = 96

Page({
  onShareAppMessage() {
    return {
      title: '权限管理',
      path: 'packageCloud/pages/database/db-permission/db-permission'
    }
  },

  data: {
    theme: 'light',
    openid: '',
    permissions: ['仅创建者可写，所有人可读', '仅创建者可读写', '仅管理端可写，所有人可读', '仅管理端可读写'],
    currentPermissionIndex: 0,
    tabs: [
      ['我的个性签名', '阿白的个性签名'],
      ['我的邮箱', '阿绿的邮箱'],
      [],
      [],
    ],
    activeTabIndex: 0,
    sliderOffset: 0,
    sliderLeft: 0,

    querying: false,
    updating: false,

    hasMyWhatsUp: false,
    myWhatsUp: '',
    adminWhatsUp: '',
    myEmail: '',
    adminEmail: '',
    hasProduct: false,
    product: {},
    serverData: '',
  },

  onLoad() {
    this.setData({
      theme: wx.getSystemInfoSync().theme || 'light'
    })

    if (wx.onThemeChange) {
      wx.onThemeChange(({theme}) => {
        this.setData({theme})
      })
    }
    if (app.globalData.openid) {
      this.setData({
        openid: app.globalData.openid
      })
    } else {
      wx.showLoading({
        title: '正在初始化...'
      })
      app.getUserOpenIdViaCloud()
        .then(openid => {
          this.setData({
            openid
          })
          wx.hideLoading()
          return openid
        }).catch(err => {
          console.error(err)
          wx.hideLoading()
          wx.showModal({
            content: '初始化失败，请检查网络',
            showCancel: false
          })
        })
    }
    const {
      myWhatsUp, adminWhatsUp, myEmail, adminEmail
    } = app.globalData
    this.setData({
      hasMyWhatsUp: !!myWhatsUp,
      myWhatsUp: myWhatsUp || '',
      adminWhatsUp: adminWhatsUp || '',
      myEmail: myEmail || '',
      adminEmail: adminEmail || '',
    })

    this.initTabs()
  },

  initTabs() {
    const currentPermissionIndex = this.data.currentPermissionIndex
    const tabLength = this.data.tabs[currentPermissionIndex].length
    const that = this
    wx.getSystemInfo({
      success(res) {
        that.setData({
          sliderLeft: (res.windowWidth / tabLength - sliderWidth) / 2,
          sliderOffset: (res.windowWidth / tabLength) * that.data.activeTabIndex
        })
      }
    })
  },

  onTabClick(e) {
    this.setData({
      sliderOffset: e.currentTarget.offsetLeft,
      activeTabIndex: Number(e.currentTarget.id)
    })
  },

  onPermissionChange(e) {
    const oldIndex = this.data.currentPermissionIndex
    const newIndex = Number(e.detail.value)
    if (oldIndex !== newIndex) {
      this.setData({
        currentPermissionIndex: Number(newIndex),
        activeTabIndex: 0
      })
      this.initTabs()
    }
  },

  bindInput(e) {
    const {name} = e.currentTarget.dataset
    this.setData({
      [name]: e.detail.value
    })
  },

  showErrorModal(name, err) {
    let errMsg = `${name}失败`
    if (err.toString().indexOf('permission denied') >= 0) {
      errMsg += '：无权限操作'
    }
    wx.showModal({
      content: errMsg,
      showCancel: false
    })
  },

  // 根据 openid 获取第一条数据
  queryOneByOpenId(collection, openid, options = {
    showLoading: false,
    showError: false,
    success: null,
    fail: null
  }) {
    const {
      showLoading, showError, success: successCallback, fail: failCallback
    } = options
    if (showLoading) {
      this.setData({
        querying: true
      })
    }
    const db = wx.cloud.database()
    const _openid = openid || this.data.openid
    db.collection(collection).where({
      _openid
    }).get({
      success: res => {
        console.log('[数据库] [查询记录] 成功: ', res)
        const resFirstData = res.data[0] || {}
        // 返回的不是要查询用户的记录，是由于没有读权限，视为查询失败
        if (resFirstData._openid && resFirstData._openid !== _openid) {
          const err = new Error('database permission denied')
          if (showError) this.showErrorModal('获取', err)
          if (failCallback) failCallback.call(this, err)
        } else if (successCallback) {
          successCallback.call(this, res.data[0])
        }
      },
      fail: err => {
        if (showError) this.showErrorModal('获取', err)
        console.error('[数据库] [查询记录] 失败：', err)
        if (failCallback) failCallback.call(this, err)
      },
      complete: () => {
        if (showLoading) {
          this.setData({
            querying: false
          })
        }
      }
    })
  },

  // 根据 openid 更新数据
  updateOneByOpenId(collection, openid, data, options = {
    showLoading: false,
    showError: false,
    success: null,
    fail: null
  }) {
    const {
      showLoading, showError, success: successCallback, fail: failCallback
    } = options
    if (showLoading) {
      this.setData({
        updating: true
      })
    }
    const db = wx.cloud.database()
    // 限制每人仅存一条记录，先查询是否已存在记录
    this.queryOneByOpenId(collection, openid || '', {
      success: dbData => {
        if (dbData) { // 已有数据，进行更新操作
          db.collection(collection).doc(dbData._id).update({
            data,
            success: res => {
              console.log('[数据库] [更新记录] 成功: ', res)
              if (successCallback) successCallback.call(this, res.stats)
            },
            fail: err => {
              if (showError) this.showErrorModal('设置', err)
              console.error('[数据库] [更新记录] 失败：', err)
              if (failCallback) failCallback.call(this, err)
            },
            complete: () => {
              if (showLoading) {
                this.setData({
                  updating: false
                })
              }
            }
          })
        } else if (!openid || openid === this.data.openid) { // 还没有插入过数据且要操作的是自己的数据，进行新增操作
          db.collection(collection).add({
            data,
            success: res => {
              console.log('[数据库] [新增记录] 成功：', res)
              if (successCallback) successCallback.call(this, {_id: res._id})
            },
            fail: err => {
              if (showError) this.showErrorModal('设置', err)
              console.error('[数据库] [新增记录] 失败：', err)
              if (failCallback) failCallback.call(this, err)
            },
            complete: () => {
              if (showLoading) {
                this.setData({
                  updating: false
                })
              }
            }
          })
        } else {
          const err = new Error('database permission denied')
          if (showError) this.showErrorModal('设置', err)
          if (failCallback) failCallback.call(this, err)
          if (showLoading) {
            this.setData({
              updating: false
            })
          }
        }
      },
      fail: err => {
        if (showError) this.showErrorModal('设置', err)
        if (failCallback) failCallback.call(this, err)
        if (showLoading) {
          this.setData({
            updating: false
          })
        }
      }
    })
  },

  // perm1：仅创建者可写，所有人可读

  queryMyWhatsUp() {
    this.queryOneByOpenId('perm1', '', {
      showLoading: true,
      showError: true,
      success: data => {
        const content = (data && data.whatsUp) || ''
        wx.showModal({
          title: '获取成功',
          content: content ? `个性签名为：${content}` : '个性签名为空',
          showCancel: false
        })
      }
    })
  },

  updateMyWhatsUp() {
    const data = {
      whatsUp: this.data.myWhatsUp
    }
    this.updateOneByOpenId('perm1', '', data, {
      showLoading: true,
      showError: true,
      success: () => {
        app.globalData.myWhatsUp = this.data.myWhatsUp
        this.setData({
          hasMyWhatsUp: true
        })
        wx.showModal({
          content: '设置成功',
          showCancel: false
        })
      }
    })
  },

  queryAdminWhatsUp() {
    this.queryOneByOpenId('perm1', 'kiki', {
      showLoading: true,
      showError: true,
      success: data => {
        const content = (data && data.whatsUp) || ''
        wx.showModal({
          title: '获取成功',
          content: content ? `个性签名为：${content}` : '个性签名为空',
          showCancel: false
        })
      }
    })
  },

  updateAdminWhatsUp() {
    const data = {
      whatsUp: this.data.adminWhatsUp
    }
    this.updateOneByOpenId('perm1', 'kiki', data, {
      showLoading: true,
      showError: true,
      success: res => {
        if (res.updated === 0) {
          wx.showModal({
            content: '设置失败：无权限操作',
            showCancel: false
          })
        } else {
          app.globalData.adminWhatsUp = this.data.adminWhatsUp
          wx.showModal({
            content: '设置成功',
            showCancel: false
          })
        }
      }
    })
  },

  // perm2：仅创建者可读写

  queryMyEmail() {
    this.queryOneByOpenId('perm2', '', {
      showLoading: true,
      showError: true,
      success: data => {
        const content = (data && data.email) || ''
        wx.showModal({
          title: '获取成功',
          content: content ? `邮箱为：${content}` : '邮箱为空',
          showCancel: false
        })
      }
    })
  },

  updateMyEmail() {
    const data = {
      email: this.data.myEmail
    }
    this.updateOneByOpenId('perm2', '', data, {
      showLoading: true,
      showError: true,
      success: () => {
        app.globalData.myEmail = this.data.myEmail
        wx.showModal({
          content: '设置成功',
          showCancel: false
        })
      }
    })
  },

  queryAdminEmail() {
    this.queryOneByOpenId('perm2', 'popo', {
      showLoading: true,
      showError: true,
      success: data => {
        const content = (data && data.email) || ''
        wx.showModal({
          title: '获取成功',
          content: content ? `邮箱为：${content}` : '邮箱为空',
          showCancel: false
        })
      }
    })
  },

  updateAdminEmail() {
    const data = {
      email: this.data.adminEmail
    }
    this.updateOneByOpenId('perm2', 'popo', data, {
      showLoading: true,
      showError: true,
      success: () => {
        app.globalData.adminEmail = this.data.adminEmail
        wx.showModal({
          content: '设置成功',
          showCancel: false
        })
      }
    })
  },

  // perm3：仅管理端可写，所有人可读

  queryProduct() {
    this.queryOneByOpenId('perm3', 'admin', {
      showLoading: true,
      showError: true,
      success: data => {
        const price = (data && data.price) || null
        wx.showModal({
          title: '获取成功',
          content: price !== null ? `商品价格为：${price}` : '商品价格暂未设置',
          showCancel: false
        })
      }
    })
  },

  updateProductPrice() {
    const data = {
      price: parseInt(this.data.product.price, 10)
    }
    this.updateOneByOpenId('perm3', 'admin', data, {
      showLoading: true,
      showError: true,
      success: () => {
        wx.showModal({
          content: '设置成功',
          showCancel: false
        })
      }
    })
  },

  // perm4：仅管理端可读写

  queryServerData() {
    this.queryOneByOpenId('perm4', 'server', {
      showLoading: true,
      showError: true,
      success: data => {
        const content = (data && data.serverData) || ''
        wx.showModal({
          title: '获取成功',
          content: content ? `后台流水数据为：${content}` : '后台流水数据为空',
          showCancel: false
        })
      }
    })
  },

  updateServerData() {
    const data = {
      data: this.data.serverData
    }
    this.updateOneByOpenId('perm4', 'server', data, {
      showLoading: true,
      showError: true,
      success: () => {
        wx.showModal({
          content: '设置成功',
          showCancel: false
        })
      }
    })
  },
})