import  * as XLSX from 'xlsx'
import { saveAs } from 'file-saver'
import  * as XLSXD from 'xlsx-js-style'

const exportExcel = (el, header, title) => {
    let $e = el
    try {
        let $table = $e.querySelector('.el-table__fixed')
        if(!$table) {
            $table = $e
        }
        const wb = XLSX.utils.table_to_book($table, {raw:true})
        if (wb && wb.Sheets.Sheet1) {
            let as = ['!cols', '!fullref', '!merges', '!ref', '!rows']
            let bs = header
            for(let i in wb.Sheets.Sheet1) {
                if (as.indexOf(i)<0) {
                    if (bs.indexOf(wb.Sheets.Sheet1[i].v)>=0) {
                        wb.Sheets.Sheet1[i].s = {
                            font:{
                                name: '微软雅黑',
                                sz: 11,
                                bold: true,
                                color: {rgb: 'ffffff'}
                            },
                            alignment: {
                                horizontal: 'center',
                                vertical: 'center'
                            },
                            fill:{fgColor: {rgb: '4f81bd'}}
                        }
                        if (i === 'A1') {
                            wb.Sheets.Sheet1['!cols'].push({wch: 30})
                        } else if (i === 'B1') {
                            wb.Sheets.Sheet1['!cols'].push({wch: 20})
                        } else {
                            wb.Sheets.Sheet1['!cols'].push({wch: 15})
                        }
                    } else {
                        wb.Sheets.Sheet1[i].s = {
                            font:{
                                name: '微软雅黑',
                                sz: 10,
                                bold: false,
                                color: {rgb: '000000'}
                            },
                            alignment: {
                                horizontal: 'center',
                                vertical: 'center'
                            },
                            // fill:{fgColor: {rgb: '4f81bd'}}
                        }
                    }
                }
            }
        }

        const wbout = XLSXD.write(wb, {bookType: 'xlsx', bookSST:true, type: 'array'})
        saveAs(
            new Blob([wbout],{type: 'application/octet-stream'}),
            `${title}.xlsx`,
        )
    } catch (e) {
        if (typeof console !== 'undefined') console.error(e)
    }
}

export default {
    exportExcel
}