<template>
  <div class="app-container">
    <!-- 支付信息 -->
    <el-card v-loading="loading">
      <el-descriptions title="支付信息" :column="3" border>
        <el-descriptions-item label="支付单号">{{ payOrder.id }}</el-descriptions-item>
        <el-descriptions-item label="商品标题">{{ payOrder.subject }}</el-descriptions-item>
        <el-descriptions-item label="商品内容">{{ payOrder.body }}</el-descriptions-item>
        <el-descriptions-item label="支付金额">￥{{ (payOrder.price / 100.0).toFixed(2) }}</el-descriptions-item>
        <el-descriptions-item label="创建时间">{{ parseTime(payOrder.createTime) }}</el-descriptions-item>
        <el-descriptions-item label="过期时间">{{ parseTime(payOrder.expireTime) }}</el-descriptions-item>
      </el-descriptions>
    </el-card>

    <!-- 支付选择框 -->
    <el-card style="margin-top: 10px" v-loading="submitLoading"  element-loading-text="提交支付中...">
      <!-- 支付宝 -->
      <el-descriptions title="选择支付宝支付">
      </el-descriptions>
      <div class="pay-channel-container">
        <div class="box" v-for="channel in channels" v-if="channel.code.indexOf('alipay_') === 0" :key="channel.code" @click="submit(channel.code)">
          <img :src="channel.icon">
          <div class="title">{{ channel.name }}</div>
        </div>
      </div>
      <!-- 微信支付 -->
      <el-descriptions title="选择微信支付" style="margin-top: 20px;" />
      <div class="pay-channel-container">
        <div class="box" v-for="channel in channels" v-if="channel.code.indexOf('wx_') === 0" :key="channel.code" @click="submit(channel.code)">
          <img :src="channel.icon">
          <div class="title">{{ channel.name }}</div>
        </div>
      </div>
      <!-- 其它支付 -->
      <el-descriptions title="选择其它支付" style="margin-top: 20px;" />
      <div class="pay-channel-container">
        <div class="box" v-for="channel in channels" :key="channel.code"
             v-if="channel.code.indexOf('alipay_') === -1 && channel.code.indexOf('wx_') === -1">
          <img :src="channel.icon">
          <div class="title">{{ channel.name }}</div>
        </div>
      </div>
    </el-card>

    <!-- 展示形式：二维码 URL -->
    <el-dialog :title="qrCode.title" :visible.sync="qrCode.visible" width="350px" append-to-body
               :close-on-press-escape="false">
      <qrcode-vue :value="qrCode.url" size="310" level="L" />
    </el-dialog>

    <!-- 展示形式：BarCode 条形码 -->
    <el-dialog :title="barCode.title" :visible.sync="barCode.visible" width="500px" append-to-body
               :close-on-press-escape="false">
      <el-form ref="form" label-width="80px">
        <el-row>
          <el-col :span="24">
            <el-form-item label="条形码" prop="name">
              <el-input v-model="barCode.value" placeholder="请输入条形码" required />
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <div style="text-align: right">
              或使用
              <el-link type="danger" target="_blank"
                       href="https://baike.baidu.com/item/条码支付/10711903">(扫码枪/扫码盒)</el-link>
              扫码
            </div>
          </el-col>
        </el-row>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submit0(barCode.channelCode)"
                   :disabled="barCode.value.length === 0">确认支付</el-button>
        <el-button @click="barCode.visible = false">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>
<script>
import QrcodeVue from 'qrcode.vue'
import { getOrder, submitOrder } from '@/api/pay/order';
import { PayChannelEnum, PayDisplayModeEnum, PayOrderStatusEnum } from "@/utils/constants";

export default {
  name: "PayCashier",
  components: {
    QrcodeVue,
  },
  data() {
    return {
      id: undefined, // 请假编号
      returnUrl: undefined, // 支付完的回调地址
      loading: false, // 支付信息的 loading
      payOrder: {}, // 支付信息
      channels: [{
        name: '支付宝 PC 网站支付',
        icon: require("@/assets/images/pay/icon/alipay_pc.svg"),
        code: "alipay_pc"
      }, {
        name: '支付宝 Wap 网站支付',
        icon: require("@/assets/images/pay/icon/alipay_wap.svg"),
        code: "alipay_wap"
      }, {
        name: '支付宝 App 网站支付',
        icon: require("@/assets/images/pay/icon/alipay_app.svg"),
        code: "alipay_app"
      }, {
        name: '支付宝扫码支付',
        icon: require("@/assets/images/pay/icon/alipay_qr.svg"),
        code: "alipay_qr"
      }, {
        name: '支付宝条码支付',
        icon: require("@/assets/images/pay/icon/alipay_bar.svg"),
        code: "alipay_bar"
      }, {
        name: '微信公众号支付',
        icon: require("@/assets/images/pay/icon/wx_pub.svg"),
        code: "wx_pub"
      }, {
        name: '微信小程序支付',
        icon: require("@/assets/images/pay/icon/wx_lite.svg"),
        code: "wx_lite"
      }, {
        name: '微信 App 支付',
        icon: require("@/assets/images/pay/icon/wx_app.svg"),
        code: "wx_app"
      }, {
        name: '微信扫码支付',
        icon: require("@/assets/images/pay/icon/wx_native.svg"),
        code: "wx_native"
      }, {
        name: '微信条码支付',
        icon: require("@/assets/images/pay/icon/wx_bar.svg"),
        code: "wx_bar"
      }, {
        name: '模拟支付',
        icon: require("@/assets/images/pay/icon/mock.svg"),
        code: "mock"
      }],
      submitLoading: false, // 提交支付的 loading
      interval: undefined, // 定时任务，轮询是否完成支付
      qrCode: { // 展示形式：二维码
        url: '',
        title: '',
        visible: false,
      },
      barCode: { // 展示形式：条形码
        channelCode: '',
        value: '',
        title: '',
        visible: false,
      },
    };
  },
  created() {
    this.id = this.$route.query.id;
    if (this.$route.query.returnUrl) {
      this.returnUrl = decodeURIComponent(this.$route.query.returnUrl)
    }
    this.getDetail();
  },
  methods: {
    /** 获得支付信息 */
    getDetail() {
      // 1.1 未传递订单编号
      if (!this.id) {
        this.$message.error('未传递支付单号，无法查看对应的支付信息');
        this.goReturnUrl('cancel');
        return;
      }
      getOrder(this.id).then(response => {
        // 1.2 无法查询到支付信息
        if (!response.data) {
          this.$message.error('支付订单不存在，请检查！');
          this.goReturnUrl('cancel');
          return;
        }
        // 1.3 如果已支付、或者已关闭，则直接跳转
        if (response.data.status === PayOrderStatusEnum.SUCCESS.status) {
          this.$message.success('支付成功');
          this.goReturnUrl('success');
          return;
        } else if (response.data.status === PayOrderStatusEnum.CLOSED.status) {
          this.$message.error('无法支付，原因：订单已关闭');
          this.goReturnUrl('close');
          return;
        }

        // 2. 可以展示
        this.payOrder = response.data;
      });
    },
    /** 提交支付 */
    submit(channelCode) {
      // 条形码支付，需要特殊处理
      if (channelCode === PayChannelEnum.ALIPAY_BAR.code) {
        this.barCode = {
          channelCode: channelCode,
          value: '',
          title: '“支付宝”条码支付',
          visible: true
        }
        return;
      }
      if (channelCode === PayChannelEnum.WX_BAR.code) {
        this.barCode = {
          channelCode: channelCode,
          value: '',
          title: '“微信”条码支付',
          visible: true
        }
        return;
      }

      // 默认的提交处理
      this.submit0(channelCode)
    },
    submit0(channelCode) {
      this.submitLoading = true
      submitOrder({
        id: this.id,
        channelCode: channelCode,
        returnUrl: location.href, // 支付成功后，支付渠道跳转回当前页；再由当前页，跳转回 {@link returnUrl} 对应的地址
        ...this.buildSubmitParam(channelCode)
      }).then(response => {
        // 直接返回已支付的情况，例如说扫码支付
        const data = response.data
        if (data.status === PayOrderStatusEnum.SUCCESS.status) {
          this.clearQueryInterval();
          this.$message.success('支付成功！');
          this.goReturnUrl();
          return
        }

        // 展示对应的界面
        if (data.displayMode === PayDisplayModeEnum.URL.mode) {
          this.displayUrl(channelCode, data)
        } else if (data.displayMode === PayDisplayModeEnum.QR_CODE.mode) {
          this.displayQrCode(channelCode, data)
        } else if (data.displayMode === PayDisplayModeEnum.APP.mode) {
          this.displayApp(channelCode, data)
        }

        // 打开轮询任务
        this.createQueryInterval()
      }).catch(() => {
        this.submitLoading = false
      });
    },
    /** 构建提交支付的额外参数 */
    buildSubmitParam(channelCode) {
      // ① 支付宝 BarCode 支付时，需要传递 authCode 条形码
      if (channelCode === PayChannelEnum.ALIPAY_BAR.code) {
        return {
          "channelExtras": {
            "auth_code": this.barCode.value
          }
        }
      }
      // ② 微信 BarCode 支付时，需要传递 authCode 条形码
      if (channelCode === PayChannelEnum.WX_BAR.code) {
        return {
          "channelExtras": {
            "authCode": this.barCode.value
          }
        }
      }
      return {}
    },
    /** 提交支付后，URL 的展示形式 */
    displayUrl(channelCode, data) {
      location.href = data.displayContent
      this.submitLoading = false
    },
    /** 提交支付后（扫码支付） */
    displayQrCode(channelCode, data) {
      let title = '请使用手机浏览器“扫一扫”';
      if (channelCode === PayChannelEnum.ALIPAY_WAP.code) {
        // 考虑到 WAP 测试，所以引导手机浏览器搞
      } else if (channelCode.indexOf('alipay_') === 0) {
        title = '请使用支付宝“扫一扫”扫码支付';
      } else if (channelCode.indexOf('wx_') === 0) {
        title = '请使用微信“扫一扫”扫码支付';
      }
      this.qrCode = {
        title: title,
        url: data.displayContent,
        visible: true
      }
      this.submitLoading = false
    },
    /** 提交支付后（App） */
    displayApp(channelCode, data) {
      if (channelCode === PayChannelEnum.ALIPAY_APP.code) {
        this.$message.error('支付宝 App 无法在网页支付！');
      }
      this.submitLoading = false
    },

    /** 轮询查询任务 */
    createQueryInterval() {
      if (this.interval) {
        return
      }
      this.interval = setInterval(() => {
        getOrder(this.id).then(response => {
          // 已支付
          if (response.data.status === PayOrderStatusEnum.SUCCESS.status) {
            this.clearQueryInterval();
            this.$message.success('支付成功！');
            this.goReturnUrl();
          }
          // 已取消
          if (response.data.status === PayOrderStatusEnum.CLOSED.status) {
            this.clearQueryInterval();
            this.$message.error('支付已关闭！');
            this.goReturnUrl();
          }
        })
      }, 1000 * 2)
    },
    /** 清空查询任务 */
    clearQueryInterval() {
      // 清空各种弹窗
      this.qrCode = {
        title: '',
        url: '',
        visible: false
      }
      // 清空任务
      clearInterval(this.interval)
      this.interval = undefined
    },
    /**
     * 回到业务的 URL
     *
     * @param payResult 支付结果
     *                  ① success：支付成功
     *                  ② cancel：取消支付
     *                  ③ close：支付已关闭
     */
    goReturnUrl(payResult) {
      // 清理任务
      this.clearQueryInterval();

      // 未配置的情况下，只能关闭
      if (!this.returnUrl) {
        this.$tab.closePage();
        return
      }

      const url = this.returnUrl.indexOf('?') >= 0
        ? this.returnUrl + '&payResult=' + payResult
        : this.returnUrl + '?payResult=' + payResult
      // 如果有配置，且是 http 开头，则浏览器跳转
      if (this.returnUrl.indexOf('http') === 0) {
        location.href = url;
      } else {
        this.$tab.closePage(() => {
          this.$router.push({
            path: url
          });
        });
      }
    }
  }
};
</script>
<style lang="scss" scoped>
.pay-channel-container {
  display: flex;
  margin-top: -10px;
  .box {
    width: 130px;
    border: 1px solid #e6ebf5;
    cursor: pointer;
    text-align: center;
    padding-top: 10px;
    padding-bottom: 5px;
    margin-right: 10px;
    img {
      width: 40px;
      height: 40px;
    }
    .title {
      padding-top: 5px
    }
  }
}
</style>
