import * as ExcelJS from 'exceljs';
import { EliteFormData } from '@fenghuo/common';

/**
 * 导出精英表单为 Excel 文件
 * @param data 表格数据
 * @param columns 列头
 * @param filename 文件名（可选）
 */
export async function exportEliteFormToExcel(
    data: EliteFormData[],
    columns: string[],
    filename?: string
): Promise<void> {
    try {
        // 创建工作簿
        const workbook = new ExcelJS.Workbook();
        const worksheet = workbook.addWorksheet('骨干名册');

        // 设置列定义
        worksheet.columns = [
            { header: '序号', key: 'sequence', width: 8 },
            { header: '专业', key: 'profession', width: 15 },
            { header: '台站', key: 'station', width: 20 },
            { header: '技师（值班代号）', key: 'technician', width: 25 },
            { header: '领班员/台站长（值班代号）', key: 'supervisor', width: 28 },
            { header: '值机员/值班员（值班代号）', key: 'operator', width: 25 }
        ];

        // 设置表头样式
        const headerRow = worksheet.getRow(1);
        headerRow.height = 25;
        headerRow.eachCell((cell) => {
            // 移除背景色
            cell.font = {
                size: 10,
                name: '黑体'
            };
            cell.alignment = {
                vertical: 'middle',
                horizontal: 'center'
            };
            cell.border = {
                top: { style: 'thin' },
                left: { style: 'thin' },
                bottom: { style: 'thin' },
                right: { style: 'thin' }
            };
        });

        // 按专业分组数据
        const groupedData = new Map<string, EliteFormData[]>();
        data.forEach(row => {
            const profession = row.profession;
            if (!groupedData.has(profession)) {
                groupedData.set(profession, []);
            }
            const professionRows = groupedData.get(profession);
            if (professionRows) {
                professionRows.push(row);
            }
        });

        // 添加数据行并处理合并单元格
        let currentRow = 2; // 从第2行开始（第1行是表头）
        let sequenceNumber = 1;

        // 辅助函数：根据职务等级生成星星
        const getStars = (dutyLevel: number): string => {
            return '★'.repeat(dutyLevel);
        };

        // 辅助函数：格式化人员信息
        const formatPersonInfo = (person: { name: string; dutyCode: string; dutyLevel: number }): string => {
            const stars = person.dutyLevel > 0 ? getStars(person.dutyLevel) : '';
            return `${person.name}(${person.dutyCode})${stars}`;
        };

        for (const [profession, rows] of groupedData) {
            const startRow = currentRow;

            // 添加该专业的所有行
            for (let i = 0; i < rows.length; i++) {
                const row = rows[i];
                if (!row) continue; // 跳过undefined的行

                const excelRow = worksheet.addRow({
                    sequence: i === 0 ? sequenceNumber : '', // 只在第一行显示序号
                    profession: i === 0 ? profession : '', // 只在第一行显示专业名称
                    station: row.parentOrganization ? `${row.parentOrganization}${row.station}` : row.station,
                    technician: row.technicians.map(formatPersonInfo).join('、') || '',
                    supervisor: row.supervisors.map(formatPersonInfo).join('、') || '',
                    operator: row.operators.map(formatPersonInfo).join('、') || ''
                });

                // 设置行高（根据内容自动调整）
                const maxLines = Math.max(
                    row.technicians.length || 1,
                    row.supervisors.length || 1,
                    row.operators.length || 1
                );
                excelRow.height = Math.max(40, maxLines * 20);

                // 设置单元格样式
                excelRow.eachCell((cell, colNumber) => {
                    cell.alignment = {
                        vertical: 'middle',
                        horizontal: colNumber <= 3 ? 'center' : 'left', // 序号、专业、台站居中，其他左对齐
                        wrapText: true
                    };
                    cell.border = {
                        top: { style: 'thin' },
                        left: { style: 'thin' },
                        bottom: { style: 'thin' },
                        right: { style: 'thin' }
                    };
                    cell.font = {
                        name: '仿宋GB2312',
                        size: 10
                    };
                });

                currentRow++;
            }

            // 如果该专业有多行，合并序号和专业单元格
            if (rows.length > 1) {
                const endRow = currentRow - 1;

                // 合并序号列
                worksheet.mergeCells(startRow, 1, endRow, 1);

                // 合并专业列
                worksheet.mergeCells(startRow, 2, endRow, 2);

                // 设置合并后单元格的对齐方式和字体
                worksheet.getCell(startRow, 1).alignment = {
                    vertical: 'middle',
                    horizontal: 'center'
                };
                worksheet.getCell(startRow, 1).font = {
                    name: '仿宋GB2312',
                    size: 11
                };
                worksheet.getCell(startRow, 2).alignment = {
                    vertical: 'middle',
                    horizontal: 'center'
                };
                worksheet.getCell(startRow, 2).font = {
                    name: '仿宋GB2312',
                    size: 11
                };
            }

            sequenceNumber++;
        }

        // 生成文件并下载
        const buffer = await workbook.xlsx.writeBuffer();
        const blob = new Blob([buffer], {
            type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
        });

        const defaultFilename = `骨干名册_${new Date().toISOString()}.xlsx`;

        // 创建下载链接
        const url = window.URL.createObjectURL(blob);
        const link = document.createElement('a');
        link.href = url;
        link.download = filename || defaultFilename;
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
        window.URL.revokeObjectURL(url);
    } catch (error) {
        console.error('导出Excel失败:', error);
        throw new Error('导出Excel失败，请稍后重试');
    }
}