#!/usr/bin/env node

import { Command } from 'commander';
import dotenv from 'dotenv';
import path from 'path';
import { OpticparseClient, ScrapeRequest } from './index';

// Load default environment variables from the current working directory's .env file
dotenv.config();

const program = new Command();

program
  .name('opticparse')
  .description('Command-line utility to scrape dynamic web pages using AI Vision & Gemini.')
  .version('1.0.0');

program
  .command('scrape')
  .description('Execute a visual scrape operation against a webpage.')
  .requiredOption('-u, --url <string>', 'The URL of the webpage to scrape.')
  .requiredOption('-q, --query <string>', 'The structured query explaining what JSON data to extract.')
  .option('-k, --key <string>', 'API key credential. Falls back to OPTICPARSE_API_KEY env variable.')
  .option('-a, --api-url <string>', 'Custom target API server host URL.')
  .option('--width <number>', 'Browser viewport width.', '1280')
  .option('--height <number>', 'Browser viewport height.', '800')
  .option('--wait-until <string>', 'Playwright wait criteria: networkidle, load, or domcontentloaded.', 'networkidle')
  .option('-t, --timeout <number>', 'Scraper connection & execution timeout in milliseconds.', '90000')
  .action(async (options) => {
    try {
      const apiKey = options.key || process.env.OPTICPARSE_API_KEY;
      const apiUrl = options.apiUrl || process.env.OPTICPARSE_API_URL;

      if (!apiKey) {
        console.error('\x1b[31mError: API Key is missing.\x1b[0m');
        console.error('Please specify the key using the -k/--key flag, or set the OPTICPARSE_API_KEY environment variable.');
        process.exit(1);
      }

      const client = new OpticparseClient({
        apiKey,
        apiUrl,
      });

      const scrapeRequest: ScrapeRequest = {
        targetUrl: options.url,
        extractionQuery: options.query,
        viewportWidth: parseInt(options.width, 10),
        viewportHeight: parseInt(options.height, 10),
        waitUntil: options.waitUntil as any,
        timeout: parseInt(options.timeout, 10),
      };

      console.log(`\x1b[36mInitiating visual scraping of:\x1b[0m ${options.url}`);
      console.log(`\x1b[36mQuery:\x1b[0m "${options.query}"`);

      const startTime = Date.now();
      const result = await client.scrape(scrapeRequest);
      const duration = ((Date.now() - startTime) / 1000).toFixed(2);

      console.log(`\x1b[32mSuccessfully scraped in ${duration}s!\x1b[0m`);
      console.log('\n\x1b[35m=== Extracted JSON Result ===\x1b[0m');
      console.log(JSON.stringify(result, null, 2));
      console.log('\x1b[35m=============================\x1b[0m');

    } catch (error: any) {
      console.error('\n\x1b[31m=== Scraper Execution Failed ===\x1b[0m');
      console.error(`\x1b[31mMessage:\x1b[0m ${error.message}`);
      if (error.statusCode) {
        console.error(`\x1b[31mHTTP Status Code:\x1b[0m ${error.statusCode}`);
      }
      if (error.details) {
        console.error(`\x1b[31mServer Details:\x1b[0m ${error.details}`);
      }
      console.error('\x1b[31m================================\x1b[0m');
      process.exit(1);
    }
  });

program.parse(process.argv);