import axios from './axios.js';
import * as cheerio from 'cheerio';
import fs from 'fs/promises';
import path from 'path';
import { fileURLToPath } from 'url';
import { getEncryptedUrl } from './getEncryptedUrl.js';
import { scrapePaginatedData, reIndex } from './scraperUtils.js'; // Import new utils

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const BASE_URL = 'http://120.236.48.169:89/HEMS/';
const START_URL = BASE_URL + 'CompanyList.aspx';

/**
 * Extracts company data from HTML content.
 * @param {object} $ - Cheerio object.
 * @param {string} origin - The origin URL for resolving relative links.
 * @returns {Promise<Array<Object>>} - An array of company data records.
 */
async function extractDataFromHtml($, origin) {
    const dataPromises = $('.resultlist table tr:has(td)').get().map(async (row) => {
        const columns = $(row).find('td');
        if (columns.length < 5) { // Expecting 5 columns: 序号, 营业执照注册号, 企业名称, 法人代表, 地址
            return null;
        }

        const companyNameCell = $(columns[2]); // 企业名称 is the 3rd column
        const companyNameLink = companyNameCell.find('a');

        const rowData = {
            '序号': $(columns[0]).text().trim(),
            '营业执照注册号': $(columns[1]).text().trim(),
            '企业名称': companyNameLink.length ? companyNameLink.text().trim() : companyNameCell.text().trim(),
            '法人代表': $(columns[3]).text().trim(),
            '地址': $(columns[4]).text().trim(),
            '企业链接': '', // Initialize
        };

        if (companyNameLink.length) {
            const onclickAttr = companyNameLink.attr('onclick');
            if (onclickAttr) {
                const match = onclickAttr.match(/open_click\(['"]([^'"]+)['"]\)/);
                if (match && match[1]) {
                    rowData['企业链接'] = await getEncryptedUrl(match[1], origin);
                }
            }
        }
        return rowData;
    });

    const data = await Promise.all(dataPromises);
    return data.filter(item => item !== null);
}


// Main function to orchestrate the scraping and saving process
export async function main() {
    try {
        console.log('🚀 开始抓取普宁房地产开发企业列表...');
        const allData = await scrapePaginatedData(START_URL, extractDataFromHtml); // Use generic pagination
        const processedData = reIndex(allData); // Use generic re-indexing

        const dataPath = path.join(__dirname, '..', 'data', 'companies.json');
        await fs.mkdir(path.dirname(dataPath), { recursive: true }); // Ensure data directory exists
        await fs.writeFile(dataPath, JSON.stringify(processedData, null, 4), 'utf-8');
        console.log(`✅ 公司列表数据已保存至 data/companies.json 文件。`);

        console.log('\n所有公司数据抓取和处理任务已完成。');

    } catch (error) {
        console.error('❌ 抓取或处理公司列表过程中发生错误:', error.message);
        if (error.response) {
            console.error('Status:', error.response.status);
            console.error('Data:', error.response.data);
        }
        process.exit(1); // Exit with error code
    }
}

// Self-execution logic
if (__filename === process.argv[1]) {
    main();
}