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';
import { CnncecpCrawler } from './cnncecp_target';
import { CgnpcCrawler } from './cgnpc_target';
import { CeicCrawler } from './ceic_target';
import { EspicCrawler } from './espic_target';
import { PowerbeijingCrawler } from './powerbeijing_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...');
    
    // 设置最大执行时间为3小时
    const maxExecutionTime = 3 * 60 * 60 * 1000; // 3小时（毫秒）
    const startTime = Date.now();
    
    // 统计结果
    const crawlResults: Record<string, { success: number; error?: string }> = {};
    
    // 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, CnncecpCrawler, CgnpcCrawler, CeicCrawler, EspicCrawler, PowerbeijingCrawler];

    try {
      for (const crawler of crawlers) {
        this.logger.log(`Crawling: ${crawler.name}`);
        
        // 检查是否超时
        const elapsedTime = Date.now() - startTime;
        if (elapsedTime > maxExecutionTime) {
          this.logger.warn(`⚠️ Crawl task exceeded maximum execution time of 3 hours. Stopping...`);
          this.logger.warn(`⚠️ Total elapsed time: ${Math.floor(elapsedTime / 1000 / 60)} minutes`);
          break;
        }
        
        try {
          const results = await crawler.crawl(browser);
          this.logger.log(`Extracted ${results.length} items from ${crawler.name}`);
          
          // 记录成功数量
          crawlResults[crawler.name] = { success: results.length };

          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}`);
          // 记录错误信息
          crawlResults[crawler.name] = { success: 0, error: err.message };
        }
      }
    } catch (error) {
      this.logger.error(`Crawl task failed: ${error.message}`);
    } finally {
      await browser.close();
      
      const totalTime = Date.now() - startTime;
      const minutes = Math.floor(totalTime / 1000 / 60);
      this.logger.log(`Crawl task finished. Total time: ${minutes} minutes`);
      
      if (totalTime > maxExecutionTime) {
        this.logger.warn(`⚠️ Crawl task exceeded maximum execution time of 3 hours.`);
      }
      
      // 输出统计总结
      this.logger.log('='.repeat(50));
      this.logger.log('爬虫执行总结 / Crawl Summary');
      this.logger.log('='.repeat(50));
      
      let totalSuccess = 0;
      let errorCount = 0;
      
      for (const [source, result] of Object.entries(crawlResults)) {
        if (result.error) {
          this.logger.error(`❌ ${source}: 出错 - ${result.error}`);
          errorCount++;
        } else {
          this.logger.log(`✅ ${source}: 成功获取 ${result.success} 条工程信息`);
          totalSuccess += result.success;
        }
      }
      
      this.logger.log('='.repeat(50));
      this.logger.log(`总计: ${totalSuccess} 条工程信息, ${errorCount} 个来源出错`);
      this.logger.log(`Total: ${totalSuccess} items, ${errorCount} sources failed`);
      this.logger.log('='.repeat(50));
    }
  }
}