#!/usr/bin/env node

/**
 * Job Search Parser - Refactored
 *
 * Uses core-parser for browser management and site-specific strategies for parsing logic
 */

const path = require("path");
const fs = require("fs");
const CoreParser = require("../core-parser");
const { skipthedriveStrategy } = require("./strategies/skipthedrive-strategy");
const { logger, analyzeBatch, checkOllamaStatus } = require("ai-analyzer");

// Load environment variables
require("dotenv").config({ path: path.join(__dirname, ".env") });

// Configuration from environment
const HEADLESS = process.env.HEADLESS !== "false";
const SEARCH_KEYWORDS =
  process.env.SEARCH_KEYWORDS || "software engineer,developer,programmer";
const LOCATION_FILTER = process.env.LOCATION_FILTER;
const ENABLE_AI_ANALYSIS = process.env.ENABLE_AI_ANALYSIS === "true";
const MAX_PAGES = parseInt(process.env.MAX_PAGES) || 5;

// Available site strategies
const SITE_STRATEGIES = {
  skipthedrive: skipthedriveStrategy,
  // Add more site strategies here
  // indeed: indeedStrategy,
  // glassdoor: glassdoorStrategy,
};

/**
 * Parse command line arguments
 */
function parseArguments() {
  const args = process.argv.slice(2);
  const options = {
    sites: ["skipthedrive"], // default
    keywords: null,
    locationFilter: null,
    maxPages: MAX_PAGES,
  };

  args.forEach((arg) => {
    if (arg.startsWith("--sites=")) {
      options.sites = arg
        .split("=")[1]
        .split(",")
        .map((s) => s.trim());
    } else if (arg.startsWith("--keywords=")) {
      options.keywords = arg
        .split("=")[1]
        .split(",")
        .map((k) => k.trim());
    } else if (arg.startsWith("--location=")) {
      options.locationFilter = arg.split("=")[1];
    } else if (arg.startsWith("--max-pages=")) {
      options.maxPages = parseInt(arg.split("=")[1]) || MAX_PAGES;
    }
  });

  return options;
}

/**
 * Main job search parser function
 */
async function startJobSearchParser(options = {}) {
  const cliOptions = parseArguments();
  const finalOptions = { ...cliOptions, ...options };

  const coreParser = new CoreParser({
    headless: HEADLESS,
    timeout: 30000,
  });

  try {
    logger.step("🚀 Job Search Parser Starting...");

    // Parse keywords
    const keywords =
      finalOptions.keywords || SEARCH_KEYWORDS.split(",").map((k) => k.trim());
    const locationFilter = finalOptions.locationFilter || LOCATION_FILTER;
    const sites = finalOptions.sites;

    logger.info(`📦 Selected job sites: ${sites.join(", ")}`);
    logger.info(`🔍 Search Keywords: ${keywords.join(", ")}`);
    logger.info(`📍 Location Filter: ${locationFilter || "None"}`);
    logger.info(
      `🧠 AI Analysis: ${ENABLE_AI_ANALYSIS ? "Enabled" : "Disabled"}`
    );

    const allResults = [];
    const allRejectedResults = [];
    const siteResults = {};

    // Process each selected site
    for (const site of sites) {
      const strategy = SITE_STRATEGIES[site];
      if (!strategy) {
        logger.error(`❌ Unknown site strategy: ${site}`);
        continue;
      }

      try {
        logger.step(`\n🌐 Parsing ${site}...`);
        const startTime = Date.now();

        const parseResult = await strategy(coreParser, {
          keywords,
          locationFilter,
          maxPages: finalOptions.maxPages,
        });

        const { results, rejectedResults, summary } = parseResult;
        const duration = ((Date.now() - startTime) / 1000).toFixed(2);

        // Collect results
        allResults.push(...results);
        allRejectedResults.push(...rejectedResults);

        siteResults[site] = {
          count: results.length,
          rejected: rejectedResults.length,
          duration: `${duration}s`,
          summary,
        };

        logger.success(
          `✅ ${site} completed in ${duration}s - Found ${results.length} jobs`
        );
      } catch (error) {
        logger.error(`❌ ${site} parsing failed: ${error.message}`);
        siteResults[site] = {
          count: 0,
          rejected: 0,
          duration: "0s",
          error: error.message,
        };
      }
    }

    // AI Analysis if enabled
    let analysisResults = null;
    if (ENABLE_AI_ANALYSIS && allResults.length > 0) {
      logger.step("🧠 Running AI Analysis...");

      const ollamaStatus = await checkOllamaStatus();
      if (ollamaStatus.available) {
        analysisResults = await analyzeBatch(allResults, {
          context:
            "Job market analysis focusing on job postings, skills, and trends",
        });
        logger.success(
          `✅ AI Analysis completed for ${allResults.length} jobs`
        );
      } else {
        logger.warning("⚠️  Ollama not available, skipping AI analysis");
      }
    }

    // Save results
    const outputData = {
      metadata: {
        extractedAt: new Date().toISOString(),
        parser: "job-search-parser",
        version: "2.0.0",
        sites: sites,
        keywords: keywords.join(", "),
        locationFilter,
        analysisResults,
      },
      results: allResults,
      rejectedResults: allRejectedResults,
      siteResults,
    };

    const resultsDir = path.join(__dirname, "results");
    if (!fs.existsSync(resultsDir)) {
      fs.mkdirSync(resultsDir, { recursive: true });
    }

    const timestamp = new Date().toISOString().replace(/[:.]/g, "-");
    const filename = `job-search-results-${timestamp}.json`;
    const filepath = path.join(resultsDir, filename);

    fs.writeFileSync(filepath, JSON.stringify(outputData, null, 2));

    // Final summary
    logger.step("\n📊 Job Search Parser Summary");
    logger.success(`✅ Total jobs found: ${allResults.length}`);
    logger.info(`❌ Total rejected: ${allRejectedResults.length}`);
    logger.info(`📁 Results saved to: ${filepath}`);

    logger.info("\n📈 Results by site:");
    for (const [site, stats] of Object.entries(siteResults)) {
      if (stats.error) {
        logger.error(`   ${site}: ERROR - ${stats.error}`);
      } else {
        logger.info(
          `   ${site}: ${stats.count} jobs found, ${stats.rejected} rejected (${stats.duration})`
        );
      }
    }

    logger.success("\n✅ Job Search Parser completed successfully!");

    return outputData;
  } catch (error) {
    logger.error(`❌ Job Search Parser failed: ${error.message}`);
    throw error;
  } finally {
    await coreParser.cleanup();
  }
}

// CLI handling
if (require.main === module) {
  startJobSearchParser()
    .then(() => process.exit(0))
    .catch((error) => {
      console.error("Fatal error:", error.message);
      process.exit(1);
    });
}

module.exports = { startJobSearchParser };