/* eslint-disable */
import { saveAs } from 'file-saver'
//import * as XLSX from 'xlsx'
import * as XLSX from 'xlsx-style'

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]
}

/**
 *
 * @param {Object} workbook 工作薄
 * @param {Object} worksheet 工作表
 * @param {Object} cell 单元格
 * 标记，引用单元格时所使用的地址格式（如：A1、C7）
 */
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 sheetFromArrayOfArrays(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] // v表示单元格原始值， t表示内容类型，s-string类型，n-number类型，b-boolean类型，d-date类型，等等
      }
      if (cell.v == null) continue
      /**
       * 通过地址对象 { r: R, c: C } 来获取单元格，R 和 C 分别代表从 0 开始的行和列的索引。
       * XLSX.utils 中的 encode_cell/decode_cell 方法可以转换单元格地址
       *    XLSX.utils.encode_cell({ r: 7, c: 2 })  ===》 C7
       */
      var cellRef = 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[cellRef] = cell
    }
  }
  // ws['!ref']：表示所有单元格的范围，例如从A1到F8则记录为A1:F8
  if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range)
  return ws
}

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]
      }
      // 如果单元格所在的值为空，让其值为“”
      if (cell.v == null) {
        cell.v = ''
      }
      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
}

let fontCellStyle = {
  font: {
    name: '宋体',
    sz: 18,
    color: { rgb: 'ff0000' },
    bold: true
  },
  alignment: {
    //对齐方式
    horizontal: 'center', //水平居中
    vertical: 'center' //竖直居中
  }
}

let defaultCellStyle = {
  alignment: {
    horizontal: 'center',
    vertical: 'center',
    indent: 0
  },
  border: {
    diagonalDown: true, //斜线方向
    diagonal: {
      color: { rgb: '303133' },
      style: 'thin'
    } //diagonalDown与diagonal必须同时使用
  }
}

/*自定义表头样式*/
let arr = ['A1', 'B1', 'C1', 'D1', 'E1', 'F1', 'G1', 'H1', 'I1', 'J1', 'K1', 'L1', 'M1', 'N1', 'O1', 'P1', 'Q1', 'R1', 'S1', 'T1', 'U1', 'V1', 'W1', 'X1', 'Y1', 'Z1']
let arr1 = ['A2', 'B2', 'C2', 'D2', 'E2', 'F2', 'G2', 'H2', 'I2', 'J2', 'K2', 'L2', 'M2', 'N2', 'O2', 'P2', 'Q2', 'R2', 'S2', 'T2', 'U2', 'V2', 'W2', 'X2', 'Y2', 'Z2']
let arr2 = ['A3', 'B3', 'C3', 'D3', 'E3', 'F3', 'G3', 'H3', 'I3', 'J3', 'K3', 'L3', 'M3', 'N3', 'O3', 'P3', 'Q3', 'R3', 'S3', 'T3', 'U3', 'V3', 'W3', 'X3', 'Y3', 'Z3']
let style = {
  font: {
    color: { rgb: '000000' },
    bold: true
  },
  border: {
    color: {
      auto: 1
    },
    top: {
      style: 'thin'
    },
    bottom: {
      style: 'thin'
    },
    left: {
      style: 'thin'
    },
    right: {
      style: 'thin'
    }
  },
  alignment: {
    horizontal: 'center',
    vertical: 'center'
  },
  fill: {
    fgColor: { rgb: 'DCDFE6' }
  }
}

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

// 字符串转为ArrayBuffer
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 = 'SheetJS'

  var wb = new Workbook()
  var 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'
  )
}

/**
 *
 * @param {Array} multiHeader  多行表头
 * @param {Array} header  表头
 * @param {Array} data  数据
 * @param {String} filename  文件名
 * @param {Array} merges  合并单元格
 * @param {Boolean} autoWidth  是否设置单元格宽度
 * @param {Array} XlsWidth  列宽度数组参数
 * @param {String} bookType  要生成的文件类型
 */
export function exportJsonToExcel({
  multiHeader = [],
  header,
  data,
  filename,
  merges = [],
  percent = [],
  autoWidth = true,
  bookType = 'xlsx',
  XlsWidth

} = {}) {
  filename = filename || '导出excel文件'
  data = [...data]
  data.unshift(header)
  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }
  var wsName = 'SheetJS'
  var wb = new Workbook()
  var ws = sheetFromArrayOfArrays(data)

  if (merges.length > 0) {
    // ws[!merges]：存放一些单元格合并信息，是一个数组，每个数组由包含s和e构成的对象组成，s表示开始，e表示结束，r表示行，c表示列
    if (!ws['!merges']) ws['!merges'] = []
    merges.forEach(item => {
      ws['!merges'].push(XLSX.utils.decode_range(item))
    })
  }

  if (autoWidth) {
    /* 设置worksheet每列的最大宽度 */
    const colWidth = data.map(row => row.map(val => {
      /* 先判断是否为null/undefined */
      if (val == null) {
        return { 'wch': 10 }
      } else if (val.toString().charCodeAt(0) > 255) { /* 再判断是否为中文 */
        return {
          'wch': val.toString().length * 2
        }
      } else {
        return {
          'wch': val.toString().length
        }
      }
    }))
    /* 以第一行为初始值 */
    let result = colWidth[0]
    for (let i = 1; i < colWidth.length; i++) {
      for (let j = 0; j < colWidth[i].length; j++) {
        if (result[j] && result[j]['wch'] < colWidth[i][j]['wch']) {
          result[j]['wch'] = colWidth[i][j]['wch']
        }
      }
    }
    // ws['!cols']设置单元格宽度, [{'wch': 10},{'wch': 10}] ===> 第一列和第二列设置了宽度
    ws['!cols'] = result

    ws['!cols'] = XlsWidth;
  }

  /* add worksheet to workbook */
  wb.SheetNames.push(wsName)
  wb.Sheets[wsName] = ws
  var dataInfo = wb.Sheets[wb.SheetNames[0]]

  // 设置单元格框线
  const borderAll = {
    top: {
      style: 'thin'
    },
    bottom: {
      style: 'thin'
    },
    left: {
      style: 'thin'
    },
    right: {
      style: 'thin'
    }
  }

  // 给所有单元格加上边框，内容居中，字体，字号，标题表头特殊格式部分后面替换
  for (var i in dataInfo) {
    if (
      i == '!ref' ||
      i == '!merges' ||
      i == '!cols' ||
      i == '!rows' ||
      i == 'A1'
    ) {} else {
      dataInfo[i + ''].s = {
        border: borderAll,
        alignment: {
          horizontal: 'center',
          vertical: 'center'
        },
        font: {
          name: '微软雅黑',
          sz: 12
        }
      }
    }
  }

  const arrabc = [ 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z' ]

  // 给标题、表格描述信息、表头等部分加上特殊格式
  arrabc.some(function(v) {
    for (let j = 1; j < (data.length + 1); j++) {
      const _v = v + j
      if (dataInfo[_v]) {
        dataInfo[_v].s = {}
        // 标题部分A1-Z1
        dataInfo['A' + j].s = {
          border: borderAll,
          font: {
            name: '微软雅黑',
            sz: 12,
            color: {
              rgb: '000000'
            },
            bold: true
          },
          alignment: {
            horizontal: 'center',
            vertical: 'center'
          }
        }
        dataInfo['B' + j].s = {
          border: borderAll,
          numFmt: '0',
          font: {
            name: '微软雅黑',
            sz: 12,
            color: {
              rgb: '000000'
            }
          },
          alignment: {
            horizontal: 'right',
            vertical: 'center'
          }
        }
        dataInfo[v + j].s = {
          border: borderAll,
          numFmt: '0.00',
          font: {
            name: '微软雅黑',
            sz: 12,
            color: {
              rgb: '000000'
            }
          },
          alignment: {
            horizontal: 'right',
            vertical: 'center'
          }
        }
        // 头部
        if (j == 1) {
          dataInfo[v + j].s = {
            border: borderAll,
            font: {
              name: '微软雅黑',
              sz: 18,
              color: {
                rgb: '000000'
              },
              bold: true
            },
            alignment: {
              horizontal: 'center',
              vertical: 'center'
            },
            fill: {
              fgColor: {
                rgb: 'f0f0f0'
              }
            }
          }
        }
        // 百分比 %
        if (percent.length != 0) {
          for (let index = 0; index < percent.length; index++) {
            if (j == percent[index]) {
              dataInfo[v + percent[index]].s = {
                numFmt: '0.00%',
                border: borderAll,
                font: {
                  name: '微软雅黑',
                  sz: 12,
                  color: {
                    rgb: '000000'
                  }
                },
                alignment: {
                  horizontal: 'right',
                  vertical: 'center'
                },
                fill: {
                  fgColor: {
                    rgb: 'FFF8DC'
                  }
                }
              }
            }
          }
        }
      }
    }
  })

  var wbout = XLSX.write(wb, {
    bookType: bookType,
    bookSST: false, // 是否生成Shared String Table，官方解释是，如果开启生成速度会下降，但在低版本IOS设备上有更好的兼容性
    type: 'binary'
  })
  saveAs(
    new Blob([s2ab(wbout)], { type: 'application/octet-stream' }),
    `${filename}.${bookType}`
  )
}

// 主要修改内容在这里
export function export_json_to_excel({
  multiHeader = [],
  header,
  data,
  filename,
  merges = [],
  percent = [],
  autoWidth = true,
  bookType = 'xlsx'
} = {}) {
  /* original data */
  filename = filename || 'excel-list'
  data = [...data]
  data.unshift(header)
  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }
  var ws_name = 'SheetJS'
  var wb = new Workbook()
  var ws = sheet_from_array_of_arrays(data)

  if (merges.length > 0) {
    if (!ws['!merges']) ws['!merges'] = []
    merges.forEach(item => {
      ws['!merges'].push(XLSX.utils.decode_range(item))
    })
  }

  // 设置单元格宽度
  if (autoWidth) {
    /* 设置worksheet每列的最大宽度*/
    const colWidth = data.map(row =>
      row.map(val => {
        /* 先判断是否为null/undefined*/
        if (val == null || val == undefined) {
          return {
            wch: 20
          }
        } else if (val.toString().charCodeAt(0) > 255) {
          /* 再判断是否为中文*/
          return {
            wch: val.toString().length * 2
          }
        } else {
          return {
            'wch': val.toString().length * 2
          }
        }
      })
    )
    /* 以主表第二行为初始值，因为我的第一行是表格标题，会比较长，所以以主表第二行为初始值*/
    const result = colWidth[0]
    for (let i = 1; i < colWidth.length; i++) {
      for (let j = 0; j < colWidth[i].length; j++) {
        if (result[j]['wch'] < colWidth[i][j]['wch']) {
          result[j]['wch'] = colWidth[i][j]['wch']
        }
      }
    }
    ws['!cols'] = result
  }
  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name)
  wb.Sheets[ws_name] = ws

  var dataInfo = wb.Sheets[wb.SheetNames[0]]
  // 设置单元格框线
  const borderAll = {
    top: {
      style: 'thin'
    },
    bottom: {
      style: 'thin'
    },
    left: {
      style: 'thin'
    },
    right: {
      style: 'thin'
    }
  }

  // 给所有单元格加上边框，内容居中，字体，字号，标题表头特殊格式部分后面替换
  for (var i in dataInfo) {
    if (i == '!ref' || i == '!merges' || i == '!cols' || i == '!rows' || i == 'A1') {

    } else {
      dataInfo[i + ''].s = {
        border: borderAll,
        alignment: {
          horizontal: 'center',
          vertical: 'center'
        },
        font: {
          name: '微软雅黑',
          sz: 12
        }
      }
    }
  }

  const arrabc = [ 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z' ]

  // 给标题、表格描述信息、表头等部分加上特殊格式
  arrabc.some(function(v) {
    for (let j = 1; j < (data.length + 1); j++) {
      const _v = v + j
      if (dataInfo[_v]) {
        dataInfo[_v].s = {}
        // 标题部分A1-Z1
        dataInfo['A' + j].s = {
          border: borderAll,
          font: {
            name: '微软雅黑',
            sz: 12,
            color: {
              rgb: '000000'
            },
            bold: true
          },
          alignment: {
            horizontal: 'center',
            vertical: 'center'
          }
        }
        dataInfo[v + j].s = {
          border: borderAll,
          numFmt: '0.00',
          font: {
            name: '微软雅黑',
            sz: 12,
            color: {
              rgb: '000000'
            }
          },
          alignment: {
            horizontal: 'right',
            vertical: 'center'
          }
        }
        // 头部
        if (j == 1) {
          dataInfo[v + j].s = {
            border: borderAll,
            font: {
              name: '微软雅黑',
              sz: 13,
              color: {
                rgb: '000000'
              },
              bold: true
            },
            alignment: {
              horizontal: 'center',
              vertical: 'center'
            },
            fill: {
              fgColor: {
                rgb: 'f0f0f0'
              }
            }
          }
        }
        // 百分比 %
        if (percent.length != 0) {
          for (let index = 0; index < percent.length; index++) {
            if (j == percent[index]) {
              dataInfo[v + percent[index]].s = {
                numFmt: '0.00%',
                border: borderAll,
                font: {
                  name: '微软雅黑',
                  sz: 12,
                  color: {
                    rgb: '000000'
                  }
                },
                alignment: {
                  horizontal: 'right',
                  vertical: 'center'
                },
                fill: {
                  fgColor: {
                    rgb: 'FFF8DC'
                  }
                }
              }
            }
          }
        }
      }
    }
  })

  var wbout = XLSX.write(wb, {
    bookType: bookType,
    bookSST: false,
    type: 'binary'
  })
  saveAs(
    new Blob([s2ab(wbout)], {
      type: 'application/octet-stream'
    }),
    `${filename}.${bookType}`
  )
}

/*二级表头*/
export function export_json_to_excelPro({
  multiHeader = [],
  header,
  data,
  filename,
  merges = [],
  autoWidth = true,
  bookType = 'xlsx'
} = {}) {
  /* original data */
  filename = filename || 'excel-list'
  data = [...data]
  data.unshift(header);

  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }

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

  if (merges.length > 0) {
    if (!ws['!merges']) ws['!merges'] = [];
    merges.forEach(item => {
      ws['!merges'].push(XLSX.utils.decode_range(item))
    })
  }

  if (autoWidth) {
    /*设置worksheet每列的最大宽度*/
    const colWidth = data.map(row => row.map(val => {
      /*先判断是否为null/undefined*/
      if (val == null) {
        return {
          'wch': 10
        };
      }
      /*再判断是否为中文*/
      else if (val.toString().charCodeAt(0) > 255) {
        return {
          'wch': val.toString().length * 2
        };
      } else {
        return {
          'wch': val.toString().length
        };
      }
    }))
    /*以第一行为初始值*/
    let result = colWidth[0];
    for (let i = 1; i < colWidth.length; i++) {
      for (let j = 0; j < colWidth[i].length; j++) {
        if (result[j]['wch'] < colWidth[i][j]['wch']) {
          result[j]['wch'] = colWidth[i][j]['wch'];
        }
      }
    }
    ws['!cols'] = result;
  }

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

  var wbout = XLSX.write(wb, {
    bookType: bookType,
    bookSST: false,
    type: 'binary'
  });
  saveAs(new Blob([s2ab(wbout)], {
    type: "application/octet-stream"
  }), `${filename}.${bookType}`);
}

/*三级表头的*/
export function export_json_to_excelProPlus({
  multiHeader = [], // 第一行表头
  multiHeader2 = [], // 第二行表头
  header, // 第三行表头
  data,
  filename, //文件名
  merges = [], // 合并
  autoWidth = true,
  bookType = 'xlsx'
} = {}) {
  /* original data */
  filename = filename || '列表'
  data = [...data]
  var ws_name = 'SheetJS'
  data.unshift(multiHeader)
  data.unshift(multiHeader2)
  data.unshift(header)
  var wb = new Workbook()
  var ws = sheet_from_array_of_arrays(data)

  if (merges.length > 0) {
    if (!ws['!merges']) ws['!merges'] = []
    merges.forEach(item => {
      ws['!merges'].push(XLSX.utils.decode_range(item))
    })
  }
  if (autoWidth) {
    /*设置worksheet每列的最大宽度*/
    const colWidth = data.map(row =>
      row.map(val => {
        /*先判断是否为null/undefined*/
        if (val == null) {
          return {
            wch: 10
          }
        } else if (val.toString().charCodeAt(0) > 255) {
          /*再判断是否为中文*/
          return {
            wch: val.toString().length * 2
          }
        } else {
          return {
            wch: val.toString().length
          }
        }
      })
    )
    /*以第一行为初始值*/
    let result = colWidth[0]
    for (let i = 1; i < colWidth.length; i++) {
      for (let j = 0; j < colWidth[i].length; j++) {
        if (result[j]['wch'] < colWidth[i][j]['wch']) {
          result[j]['wch'] = colWidth[i][j]['wch']
        }
      }
    }
    ws['!cols'] = result
  }

  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name)
  wb.Sheets[ws_name] = ws
  var dataInfo = wb.Sheets[wb.SheetNames[0]]
  for (var i = 0; i < multiHeader.length; i++) {
    dataInfo[arr[i]].s = style
  }
  for (var j = 0; j < multiHeader2.length; j++) {
    dataInfo[arr1[j]].s = style
  }
  for (var k = 0; k < header.length; k++) {
    dataInfo[arr2[k]].s = style
  }
  var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' })
  saveAs(new Blob([s2ab(wbout)], { type: 'application/octet-stream' }), `${filename}.${bookType}`)
}