import fs from 'fs/promises';

/**
 * Generates a CSV file from the given data.
 * @param {Array<Object>} data - The data to convert to CSV.
 * @param {string} filePath - The path to save the CSV file.
 */

async function generateCsv(data, filePath) {
    if (data.length === 0) {
        console.log(`没有数据可生成 CSV 文件 (${filePath})。`);
        return;
    }
    const headers = Object.keys(data[0]);
    const csvRows = [];
    csvRows.push(headers.map(header => `"${header}"`).join(','));
    for (const record of data) {
        const values = headers.map(header => {
            const value = record[header];
            // Ensure values are properly quoted and internal quotes are escaped
            return `"${String(value).replace(new RegExp('"', 'g'), '""')}"`;
        });
        csvRows.push(values.join(','));
    }
    const csvContent = csvRows.join('\n');
    const BOM = '\uFEFF'; // UTF-8 BOM
    await fs.writeFile(filePath, BOM + csvContent, 'utf-8');
    console.log(`已生成 ${filePath} 文件。`);
}