//Export2Excel.js
/* eslint-disable */
require('script-loader!file-saver');
require('./Blob.js');//转二进制用  这边要写你的blob的实际地址
require('script-loader!xlsx/dist/xlsx.core.min');

function generateArray(table) {
  var out = [];
  var rows = table.querySelectorAll('tr');
  var ranges = [];
  for (var R = 0; R < rows.length; ++R) {
    var outRow = [];
    var row = rows[R];
    var columns = row.querySelectorAll('td');
    for (var C = 0; C < columns.length; ++C) {
      var cell = columns[C];
      var colspan = cell.getAttribute('colspan');
      var rowspan = cell.getAttribute('rowspan');
      var cellValue = cell.innerText;
      if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;

      //Skip ranges
      ranges.forEach(function (range) {
        if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) {
          for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
        }
      });

      //Handle Row Span
      if (rowspan || colspan) {
        rowspan = rowspan || 1;
        colspan = colspan || 1;
        ranges.push({
          s: {
            r: R,
            c: outRow.length
          },
          e: {
            r: R + rowspan - 1,
            c: outRow.length + colspan - 1
          }
        });
      };

      //Handle Value
      outRow.push(cellValue !== "" ? cellValue : null);

      //Handle Colspan
      if (colspan)
        for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
    }
    out.push(outRow);
  }
  return [out, ranges];
};

function datenum(v, date1904) {
  if (date1904) v += 1462;
  var epoch = Date.parse(v);
  return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
}

function sheet_from_array_of_arrays(data, opts) {
  var ws = {};
  var range = {
    s: {
      c: 10000000,
      r: 10000000
    },
    e: {
      c: 0,
      r: 0
    }
  };
  for (var R = 0; R != data.length; ++R) {
    for (var C = 0; C != data[R].length; ++C) {
      if (range.s.r > R) range.s.r = R;
      if (range.s.c > C) range.s.c = C;
      if (range.e.r < R) range.e.r = R;
      if (range.e.c < C) range.e.c = C;
      var cell = {
        v: data[R][C]
      };
      if (cell.v == null) continue;
      var cell_ref = XLSX.utils.encode_cell({
        c: C,
        r: R
      });

      if (typeof cell.v === 'number') cell.t = 'n';
      else if (typeof cell.v === 'boolean') cell.t = 'b';
      else if (cell.v instanceof Date) {
        cell.t = 'n';
        cell.z = XLSX.SSF._table[14];
        cell.v = datenum(cell.v);
      } else cell.t = 's';

      ws[cell_ref] = cell;
    }
  }
  if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range);
  return ws;
}

function Workbook() {
  if (!(this instanceof Workbook)) return new Workbook();
  this.SheetNames = [];
  this.Sheets = {};
}

function s2ab(s) {
  var buf = new ArrayBuffer(s.length);
  var view = new Uint8Array(buf);
  for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
  return buf;
}

export function export_table_to_excel(id) {
  var theTable = document.getElementById(id);
  var oo = generateArray(theTable);
  var ranges = oo[1];

  /* original data */
  var data = oo[0];
  var ws_name = "风机数据";

  var wb = new Workbook(),
    ws = sheet_from_array_of_arrays(data);

  /* add ranges to worksheet */
  // ws['!cols'] = ['apple', 'banan'];
  ws['!merges'] = ranges;

  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;

  var wbout = XLSX.write(wb, {
    bookType: 'xlsx',
    bookSST: false,
    type: 'binary'
  });

  saveAs(new Blob([s2ab(wbout)], {
    type: "application/octet-stream"
  }), "test.xlsx")
}

function formatJson(jsonData) {
}
export function export_json_to_excel(th, jsonData, defaultTitle) {

  /* original data */

  var data = jsonData;
  data.unshift(th);
  var ws_name = "导出的Excel";

  var wb = new Workbook(),
    ws = sheet_from_array_of_arrays(data);


  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;

  var wbout = XLSX.write(wb, {
    bookType: 'xlsx',
    bookSST: false,
    type: 'binary'
  });
  var title = defaultTitle || '列表'
  saveAs(new Blob([s2ab(wbout)], {
    type: "application/octet-stream"
  }), title + ".xlsx")
};

export function export_blob(th, jsonData, defaultTitle) {
  var data = jsonData;
  data.unshift(th);
  var ws_name = "风机数据";
  var wb = new Workbook(),
    ws = sheet_from_array_of_arrays(data);
  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;
  var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });

  if (defaultTitle) {//只渲染一个excel
    saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), defaultTitle + ".xlsx")
  } else {//返回多个blob
    var aaa = new Blob([s2ab(wbout)], { type: 'text/plain' });
    return aaa;
  }
};

export function export_more_blob(th, jsonData, defaultTitle) {
  var data = jsonData;
  //添加标题
  for (var i = 0; i < th.length; i++) {
    data[i].unshift(th[i])
  }
  //这里是定义sheet的名称 有几个sheet就加几个
  var ws_name = ["日上网电量", "上网功率", "测风塔数据"];
  var wb = new Workbook(), ws = [];
  //数据转换
  for (var j = 0; j < th.length; j++) {
    ws.push(sheet_from_array_of_arrays(data[j]))
  }
  /* add worksheet to workbook */
  //生成多个sheet
  for (var k = 0; k < th.length; k++) {
    wb.SheetNames.push(ws_name[k])
    wb.Sheets[ws_name[k]] = ws[k]
  }

  var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });

  if (defaultTitle) {//只渲染一个excel
    saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), defaultTitle + ".xlsx")
  } else {//返回多个blob
    var aaa = new Blob([s2ab(wbout)], { type: 'text/plain' });
    return aaa;
  }
}

export function exportMultiple(thArray, dataArray, sheetNameArray, fileName = "导出的Excel") {

  let ws_name = sheetNameArray;
  let wb = new Workbook();
  let ws = [];
  let filterArray = [];

  const formatJson = function (filterVal, jsonData) {
    return jsonData.map(v => filterVal.map(j => v[j]));
  };

  thArray.forEach((pEle, pIndex) => {
    ws.push([]);
    dataArray[pIndex].unshift(pEle);
    filterArray.push([]);
    pEle.forEach(cEle => {
      filterArray[pIndex].push(cEle.field);
    });
  });

  thArray.forEach((pEle, pIndex) => {
    const data = formatJson(filterArray[pIndex], dataArray[pIndex]);
    ws[pIndex].push(sheet_from_array_of_arrays(data));
    wb.SheetNames.push(ws_name[pIndex]);
    wb.Sheets[ws_name[pIndex]] = ws[pIndex][0];
  });


  let cellKes = []
  for (var i = 0; i < 26; i++) {
    cellKes.push(String.fromCharCode(65 + i));
  }

  let idx = 0;
  ws.forEach((pEle, pIndex) => {
    idx = 0
    thArray[pIndex].forEach(thEle => {
      pEle.forEach(cEle => {
        cEle[cellKes[idx] + 1] = { v: thEle.name, t: "s" }
        idx++;
      });
    });
  });

  let wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });
  saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), fileName + ".xlsx");

}