<template>
  <!-- OCR 单据智能识别 -->
  <el-dialog
    custom-class="ocr-invoices-dialog"
    :visible.sync="show"
    :show-close="false"
    width="80%"
    top="10vh"
  >
    <div slot="title" class="ocr-title">
      <span style="font-weight: bold;">OCR智能识别</span>
      <div>
        <c-button type="primary" @click="save">保存</c-button>
        <c-button type="primary" @click="close">关闭</c-button>
      </div>
    </div>
    <div class="invoices-recognition">
      <div class="invoices-area">
        <div class="file-name">{{ fileName }}</div>
        <!-- <iframe class="pdf-file" :src="fileUrl" type="application/pdf" /> -->
        <div class="pdf-file">
          <el-scrollbar :style="{ height: imgContainerHeight + 'px' }">
            <div style="height: 100%;display: flex;justify-content: center;">
              <el-image :src="fileUrl" @load="ocr" alt="单据" style="display: block;"></el-image>
            </div>
          </el-scrollbar>
        </div>
      </div>
      <div class="recognition-area">
        <el-scrollbar :style="{ height: imgContainerHeight + 'px' }">
          <el-form
            v-model="formData"
            label-width="100px"
            label-position="right"
          >
            <c-col :span="24">
              <el-form-item label="">
                <c-select v-model="formData.type" @change="fileTypeChangeEvent">
                  <el-option
                    v-for="(item, idx) in fileType"
                    :key="idx"
                    :label="item.label"
                    :value="item.value"
                  ></el-option>
                </c-select>
              </el-form-item>
            </c-col>
            <!-- 商业发票 -->
            <c-col :span="24" v-if="formData.type === 'commercial_invoice'">
              <c-col :span="24">
                <el-form-item label="发票日期">
                  <c-input type="textarea" v-model="formData['commercial invoice']['Date']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="发票金额">
                  <c-input type="textarea" v-model="formData['commercial invoice']['TOTAL CONTRACT VALUE']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="是否正本">
                  <c-select v-model="formData['commercial invoice'].original" style="width: 100%;">
                    <el-option
                      v-for="(item, idx) in invoicesOriginalOptions"
                      :key="idx"
                      :label="item.label"
                      :value="item.value"
                    ></el-option>
                  </c-select>
                </el-form-item>
              </c-col>
            </c-col>
            <!-- 提货单 -->
            <c-col :span="24" v-if="formData.type === 'bill_of_lading'">
              <c-col :span="24">
                <el-form-item label="发货人">
                  <c-input type="textarea" v-model="formData['bill of lading']['Shipper']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="收货人">
                  <c-input type="textarea" v-model="formData['bill of lading']['Consignee']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="通知地址">
                  <c-input type="textarea" v-model="formData['bill of lading']['Notify address']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="船舶">
                  <c-input type="textarea" v-model="formData['bill of lading']['Vessel']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="装货港">
                  <c-input type="textarea" v-model="formData['bill of lading']['Port of Loading']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="卸货港">
                  <c-input type="textarea" v-model="formData['bill of lading']['Port of Discharge']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="托运人的货物描述">
                  <!-- <c-input type="textarea" v-model="formData['bill of lading']['Shipper's description of goods']"></c-input> -->
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="毛重">
                  <c-input type="textarea" v-model="formData['bill of lading']['GROSS WEIGHT']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="据称重量">
                  <c-input type="textarea" v-model="formData['bill of lading']['SAID TO WEIGH']"></c-input>
                </el-form-item>
              </c-col>
            </c-col>
            <!-- 海运货物证书 -->
            <c-col :span="24" v-if="formData.type === 'marine_cargo_certificate'">
              <c-col :span="24">
                <el-form-item label="证书号码">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Certificate Number']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="预约保险单编号">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Open Policy Number']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="帐号">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Account Number']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="被保险人">
                  <c-input type="textarea" v-model="formData['marine cargo certificate'].assured"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="保险金额">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Sum Insured']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="航次">
                  <c-input type="textarea" v-model="formData['marine cargo certificate'].voyage"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="参考编号">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Reference No']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="航班号">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Airline/Fight No']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="出发日期">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Departing on or about']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="达到日期">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Arrival on or about']"></c-input>
                </el-form-item>
              </c-col>
              <c-col :span="24">
                <el-form-item label="空运单编号">
                  <c-input type="textarea" v-model="formData['marine cargo certificate']['Airway Bill No']"></c-input>
                </el-form-item>
              </c-col>
            </c-col>
          </el-form>
        </el-scrollbar>
      </div>
    </div>
  </el-dialog>
</template>

<script>
import axios from 'axios'

// import bill_of_ladingPdf from "~/assets/demo-files/bill_of_lading.pdf";
// import commercial_invoicePdf from "~/assets/demo-files/commercial_invoice.pdf";
// import marine_cargo_certificatePdf from "~/assets/demo-files/marine_cargo_certificate.pdf";

export default {
  name: "OcrRecognition",
  data() {
    return {
      show: false,
      fileName: "KZ3500220597AA-001.pdf",
      // fileUrl: "/invoice.pdf",
      // fileUrl: require("~/assets/demo-files/bill_of_lading.jpg"),
      fileUrl: require("~/assets/demo-files/commercial_invoice.jpg"),
      // fileUrl: require("~/assets/demo-files/marine_cargo_certificate.jpg"),
      imgContainerHeight: 0,
      fileType: [
        { label: "商业发票", value: "commercial_invoice" },
        { label: "提货单", value: "bill_of_lading" },
        { label: "海运货物证书", value: "marine_cargo_certificate" },
      ],
      invoicesOriginalOptions: [
        { label: "是", value: 1 },
        { label: "否", value: 0 },
      ],
      formData: {
        type: 'commercial_invoice',
        "commercial invoice": {
          'Date': '',
          'TOTAL CONTRACT VALUE': "",
          original: 1
        },
        "bill of lading": {
          "Shipper": '',
          "Consignee": '',
          "Notify address": '',
          "Vessel": '',
          "Port of Loading": '',
          "Port of Discharge": '',
          "Shipper's description of goods": '',
          "GROSS WEIGHT": '',
          "SAID TO WEIGH": ''
        },
        "marine cargo certificate": {
          "Certificate Number": '',
          "Open Policy Number": '',
          "Account Number": '',
          assured: '',
          "Sum Insured": '',
          voyage: '',
          "Reference No": '',
          "Airline/Fight No": '',
          "Departing on or about": '',
          "Arrival on or about": '',
          "Airway Bill No": ''
        }
      }
    };
  },
  watch: {
    show(newVal, oldVal) {
      if (!this.imgContainerHeight) {
        if (newVal) {
          this.$nextTick(() => {
            const ele = this.$el.querySelector(
              ".invoices-recognition .invoices-area .pdf-file"
            );
            this.imgContainerHeight = ele.clientHeight;
          });
        }
      }
    },
  },
  methods: {
    save() {
      this.$emit("confirm");
      this.close();
    },
    close() {
      this.show = false;
    },
    fileTypeChangeEvent(val) {
      this.fileUrl = require(`~/assets/demo-files/${val}.jpg`)
    },
    ocr() {
      const image = new Image();
      image.crossOrigin = 'Anonymous';
      image.src = this.fileUrl;
      image.onload = () => {
        const canvas = document.createElement('canvas')
        canvas.width = image.width
        canvas.height = image.height
        const ctx = canvas.getContext('2d')
        ctx.drawImage(image, 0, 0, image.width, image.height)
        var dataURL = canvas.toDataURL('image/jpeg')// base64 格式
        var blob = this.dataURItoBlob(dataURL)       //转二进制
        const file = new File([blob], `${this.formData.type}.jpg`, { type: blob.type })
        const formData = new FormData();
        formData.append('mode', 'formdata');
        formData.append('the_file', file)
        const loading = this.$parent.root.loading("正在识别中...")
        axios.post('/ocr/mockfile', formData, {
          'Content-Type': 'multipart/form-data'
        }).then(res => {
          const data = res.data
          if (data.code === 200) {
            this.updateFormData(data.data)
          } else {
            this.$message.error(`识别失败：${data.data.err}`);
          }
          loading.close()
        }).catch(error => {
          loading.close()
        })
      }
    },
    dataURItoBlob (dataURI) {
      const arr = dataURI.split(',')
      // const mimeString = arr[0].match(/:(.*?);/)[0];
      const mimeString = arr[0].split(':')[1].split(';')[0];
      // base64 解码
      const byteString = window.atob(arr[1]);
      const ab = new ArrayBuffer(byteString.length);
      const ia = new Uint8Array(ab);
      for (let i = 0; i < byteString.length; i++) {
        ia[i] = byteString.charCodeAt(i);
      }
      return new Blob([ab], {type: mimeString});
    },
    updateFormData(data) {
      this.formData[data.template_name] = Object.assign(this.formData[data.template_name], data.ocr_text)
    }
  },
};
</script>

<style>
.ocr-invoices-dialog {
  height: 85%;
  display: flex;
  flex-direction: column;
  margin-bottom: unset;
}
.ocr-invoices-dialog .el-dialog__header,
.ocr-invoices-dialog .el-dialog__body {
  padding: 0;
}
.ocr-invoices-dialog .el-dialog__body {
  flex: 1;
}
.ocr-invoices-dialog .el-scrollbar__wrap {
  overflow-x: auto;
}
</style>

<style scoped>
.ocr-title {
  display: flex;
  justify-content: space-between;
  padding: 5px 10px 5px 20px;
  border-bottom: 1px solid #dadbdd;
}
.invoices-recognition {
  height: 100%;
  display: flex;
  background-color: #f6fbff;
  padding: 20px;
  box-sizing: border-box;
}
.invoices-area {
  height: 100%;
  width: 50%;
  border-right: 1px solid #babec1;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  padding: 0 10px;
  overflow: hidden;
}
.recognition-area {
  height: 100%;
  width: 50%;
  border-left: 1px solid #babec1;
  box-sizing: border-box;
}

.invoices-area .file-name {
  padding-bottom: 10px;
  text-align: center;
}
.invoices-area .pdf-file {
  flex: 1;
}
</style>