#!/usr/bin/env npx tsx
/**
 * Backfill CLI - Historical data hydration
 *
 * Usage:
 *   npx tsx src/canonical-hydration/cli/backfill.ts [options]
 *
 * Options:
 *   --dispensary-id <id>  Hydrate only a specific dispensary
 *   --start-date <date>   Start date for backfill (ISO format)
 *   --end-date <date>     End date for backfill (ISO format)
 *   --batch-size <n>      Number of jobs to process per batch (default: 50)
 *   --dry-run             Show what would be done without making changes
 *   --status              Show hydration status and exit
 *
 * Examples:
 *   npx tsx src/canonical-hydration/cli/backfill.ts --status
 *   npx tsx src/canonical-hydration/cli/backfill.ts --dispensary-id 112
 *   npx tsx src/canonical-hydration/cli/backfill.ts --start-date 2024-01-01 --end-date 2024-12-31
 *   npx tsx src/canonical-hydration/cli/backfill.ts --dry-run
 */

import { Pool } from 'pg';
import { CanonicalHydrationService } from '../hydration-service';
import { HydrationOptions } from '../types';

async function main() {
  const args = process.argv.slice(2);

  // Parse command line arguments
  const options: HydrationOptions = {
    mode: 'backfill',
  };
  let showStatus = false;

  for (let i = 0; i < args.length; i++) {
    const arg = args[i];
    switch (arg) {
      case '--dispensary-id':
        options.dispensaryId = parseInt(args[++i]);
        break;
      case '--start-date':
        options.startDate = new Date(args[++i]);
        break;
      case '--end-date':
        options.endDate = new Date(args[++i]);
        break;
      case '--batch-size':
        options.batchSize = parseInt(args[++i]);
        break;
      case '--dry-run':
        options.dryRun = true;
        break;
      case '--status':
        showStatus = true;
        break;
      case '--help':
        console.log(`
Backfill CLI - Historical data hydration

Usage:
  npx tsx src/canonical-hydration/cli/backfill.ts [options]

Options:
  --dispensary-id <id>  Hydrate only a specific dispensary
  --start-date <date>   Start date for backfill (ISO format)
  --end-date <date>     End date for backfill (ISO format)
  --batch-size <n>      Number of jobs to process per batch (default: 50)
  --dry-run             Show what would be done without making changes
  --status              Show hydration status and exit

Examples:
  npx tsx src/canonical-hydration/cli/backfill.ts --status
  npx tsx src/canonical-hydration/cli/backfill.ts --dispensary-id 112
  npx tsx src/canonical-hydration/cli/backfill.ts --start-date 2024-01-01 --end-date 2024-12-31
  npx tsx src/canonical-hydration/cli/backfill.ts --dry-run
        `);
        process.exit(0);
    }
  }

  // Connect to database
  const pool = new Pool({
    connectionString: process.env.DATABASE_URL,
  });

  const service = new CanonicalHydrationService({
    pool,
    logger: (msg) => console.log(`[${new Date().toISOString()}] ${msg}`),
  });

  try {
    if (showStatus) {
      // Show status and exit
      if (options.dispensaryId) {
        const status = await service.getHydrationStatus(options.dispensaryId);
        console.log(`\nHydration Status for Dispensary ${options.dispensaryId}:`);
        console.log('═'.repeat(50));
        console.log(`  Source Jobs (completed):    ${status.sourceJobs}`);
        console.log(`  Hydrated Jobs:              ${status.hydratedJobs}`);
        console.log(`  Unhydrated Jobs:            ${status.unhydratedJobs}`);
        console.log('');
        console.log(`  Source Products:            ${status.sourceProducts}`);
        console.log(`  Store Products:             ${status.storeProducts}`);
        console.log('');
        console.log(`  Source Snapshots:           ${status.sourceSnapshots}`);
        console.log(`  Store Snapshots:            ${status.storeSnapshots}`);
      } else {
        const status = await service.getOverallStatus();
        console.log('\nOverall Hydration Status:');
        console.log('═'.repeat(50));
        console.log(`  Dispensaries with Data:     ${status.dispensariesWithData}`);
        console.log('');
        console.log(`  Source Jobs (completed):    ${status.totalSourceJobs}`);
        console.log(`  Hydrated Jobs:              ${status.totalHydratedJobs}`);
        console.log(`  Unhydrated Jobs:            ${status.totalSourceJobs - status.totalHydratedJobs}`);
        console.log('');
        console.log(`  Source Products:            ${status.totalSourceProducts}`);
        console.log(`  Store Products:             ${status.totalStoreProducts}`);
        console.log('');
        console.log(`  Source Snapshots:           ${status.totalSourceSnapshots}`);
        console.log(`  Store Snapshots:            ${status.totalStoreSnapshots}`);
      }
      process.exit(0);
    }

    // Run backfill
    console.log('\n' + '═'.repeat(60));
    console.log('  CANONICAL HYDRATION - BACKFILL MODE');
    console.log('═'.repeat(60));
    console.log(`  Dispensary ID: ${options.dispensaryId || 'ALL'}`);
    console.log(`  Start Date:    ${options.startDate?.toISOString() || 'N/A'}`);
    console.log(`  End Date:      ${options.endDate?.toISOString() || 'N/A'}`);
    console.log(`  Batch Size:    ${options.batchSize || 50}`);
    console.log(`  Dry Run:       ${options.dryRun ? 'YES' : 'NO'}`);
    console.log('═'.repeat(60) + '\n');

    const result = await service.hydrate(options);

    console.log('\n' + '═'.repeat(60));
    console.log('  HYDRATION COMPLETE');
    console.log('═'.repeat(60));
    console.log(`  Crawl Runs Created:  ${result.crawlRunsCreated}`);
    console.log(`  Crawl Runs Skipped:  ${result.crawlRunsSkipped}`);
    console.log(`  Products Upserted:   ${result.productsUpserted}`);
    console.log(`  Snapshots Written:   ${result.snapshotsWritten}`);
    console.log(`  Duration:            ${result.durationMs}ms`);
    console.log(`  Errors:              ${result.errors.length}`);

    if (result.errors.length > 0) {
      console.log('\nErrors:');
      for (const error of result.errors.slice(0, 10)) {
        console.log(`  - ${error}`);
      }
      if (result.errors.length > 10) {
        console.log(`  ... and ${result.errors.length - 10} more`);
      }
    }
    console.log('═'.repeat(60) + '\n');

    process.exit(result.errors.length > 0 ? 1 : 0);
  } catch (error: any) {
    console.error('Fatal error:', error.message);
    process.exit(1);
  } finally {
    await pool.end();
  }
}

main();