import { Injectable, Logger } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import * as puppeteer from 'puppeteer';
import { BidsService } from '../../bids/services/bid.service';
import { ChdtpCrawler } from './chdtp_target';
import { ChngCrawler } from './chng_target';
import { SzecpCrawler } from './szecp_target';
import { CdtCrawler } from './cdt_target';
import { EpsCrawler } from './eps_target';

@Injectable()
export class BidCrawlerService {
  private readonly logger = new Logger(BidCrawlerService.name);

  constructor(
    private bidsService: BidsService,
    private configService: ConfigService,
  ) {}

  async crawlAll() {
    this.logger.log('Starting crawl task with Puppeteer...');
    
    // 从环境变量读取代理配置
    const proxyHost = this.configService.get<string>('PROXY_HOST');
    const proxyPort = this.configService.get<string>('PROXY_PORT');
    const proxyUsername = this.configService.get<string>('PROXY_USERNAME');
    const proxyPassword = this.configService.get<string>('PROXY_PASSWORD');

    // 构建代理参数
    const args = [
      '--no-sandbox',
      '--disable-setuid-sandbox',
      '--disable-blink-features=AutomationControlled',
      '--disable-infobars',
      '--window-position=0,0',
      '--ignore-certifcate-errors',
      '--ignore-certifcate-errors-spki-list',
    ];

    if (proxyHost && proxyPort) {
      const proxyUrl = proxyUsername && proxyPassword
        ? `http://${proxyUsername}:${proxyPassword}@${proxyHost}:${proxyPort}`
        : `http://${proxyHost}:${proxyPort}`;
      args.push(`--proxy-server=${proxyUrl}`);
      this.logger.log(`Using proxy: ${proxyHost}:${proxyPort}`);
    }

    const browser = await puppeteer.launch({
      headless: false,
      args,
    });

    const crawlers = [ChdtpCrawler, ChngCrawler, SzecpCrawler, CdtCrawler, EpsCrawler];

    try {
      for (const crawler of crawlers) {
        this.logger.log(`Crawling: ${crawler.name}`);
        try {
          const results = await crawler.crawl(browser);
          this.logger.log(`Extracted ${results.length} items from ${crawler.name}`);

          for (const item of results) {
            await this.bidsService.createOrUpdate({
              title: item.title,
              url: item.url,
              publishDate: item.publishDate,
              source: crawler.name, 
              unit: '', 
            });
          }
        } catch (err) {
          this.logger.error(`Error crawling ${crawler.name}: ${err.message}`);
        }
      }
    } catch (error) {
      this.logger.error(`Crawl task failed: ${error.message}`);
    } finally {
      await browser.close();
      this.logger.log('Crawl task finished.');
    }
  }
}