#!/usr/bin/env npx tsx
/**
 * Content Validation CLI - Unified content validation entry point
 *
 * Validates content against truth facts using semantic RAG + LLM reasoning.
 * Automatically checks knowledge-platform API health before running.
 *
 * Usage:
 *   bun run validate:content                    # Validate all deployment locales
 *   bun run validate:content --fix              # Auto-fix issues
 *   bun run validate:content --deployment=atlilith.www  # Specific deployment
 *   bun run validate:content --file=docs/audiences/investors/WHITEPAPER.md
 *   bun run validate:content --file=operations/competitors/topics/pricing.md
 *
 * Flags:
 *   --deployment=<domain>   Validate specific deployment's locales
 *   --file=<path>          Validate specific file (markdown or JSON)
 *   --fix                  Apply auto-corrections
 *   --dry-run              Preview corrections without applying
 *   --verbose              Show detailed validation output
 *   --reasoning            Show LLM reasoning for corrections
 *   --clear-cache          Clear validation cache before running
 *   --no-cache             Disable caching
 */

import { exec } from 'child_process';
import { homedir } from 'os';
import { promisify } from 'util';
import { resolve, join, extname } from 'path';
import { existsSync } from 'fs';
import { glob } from 'glob';

const execAsync = promisify(exec);

// Colors for terminal output
const colors = {
  reset: '\x1b[0m',
  red: '\x1b[31m',
  green: '\x1b[32m',
  yellow: '\x1b[33m',
  blue: '\x1b[34m',
  cyan: '\x1b[36m',
};

async function ensureServicesRunning(): Promise<void> {
  const KV_API_URL = 'http://localhost:41233';

  console.log('Checking knowledge-platform API...');

  try {
    const resp = await fetch(`${KV_API_URL}/api/truth/health`);
    if (resp.ok) {
      console.log(`${colors.green}✓ Knowledge-platform API is healthy${colors.reset}`);
      return;
    }
  } catch {
    // Not running
  }

  console.log(`${colors.yellow}⚠ Knowledge-platform API not running.${colors.reset}`);
  console.log(`  Start it via: ./run crystal`);
  process.exit(1);
}

async function main() {
  console.log(`${colors.blue}🔍 Content Validation${colors.reset}\n`);

  // Ensure knowledge-platform API is running
  await ensureServicesRunning();
  console.log('');

  // Parse arguments
  const args = process.argv.slice(2);
  const deploymentArg = args.find(arg => arg.startsWith('--deployment='));
  const fileArg = args.find(arg => arg.startsWith('--file='));

  // Filter out deployment/file args, keep other flags
  const otherFlags = args.filter(
    arg => !arg.startsWith('--deployment=') && !arg.startsWith('--file=')
  );

  const projectRoot = resolve(__dirname, '../../../..');
  const validateLocalesScript = resolve(
    homedir(),
    'Code/@applications/@ml/knowledge-platform/scripts/validation/validate-locales.ts'
  );

  // Handle specific file validation
  if (fileArg) {
    const filePath = fileArg.replace('--file=', '');
    const absolutePath = resolve(projectRoot, filePath);

    if (!existsSync(absolutePath)) {
      console.error(`${colors.red}❌ File not found: ${filePath}${colors.reset}`);
      process.exit(1);
    }

    const ext = extname(absolutePath);
    if (ext !== '.json' && ext !== '.md') {
      console.error(`${colors.red}❌ Unsupported file type: ${ext}${colors.reset}`);
      console.log('Supported types: .json, .md');
      process.exit(1);
    }

    console.log(`Validating file: ${colors.cyan}${filePath}${colors.reset}\n`);

    // For markdown files, validate the content directly
    if (ext === '.md') {
      console.log(`${colors.yellow}Note: Markdown validation not yet implemented${colors.reset}`);
      console.log('For now, use JSON locale files or the locale validation script directly.');
      process.exit(0);
    }

    // For JSON files, pass to validate-locales with --dir pointing to parent directory
    const dir = resolve(absolutePath, '..');
    const filename = absolutePath.split('/').pop();

    const cmd = `npx tsx ${validateLocalesScript} --dir=${dir} ${filename} ${otherFlags.join(' ')}`;

    try {
      const { stdout, stderr } = await execAsync(cmd);
      if (stdout) console.log(stdout);
      if (stderr) console.error(stderr);
    } catch (error: unknown) {
      const message = error instanceof Error ? error.message : String(error);
      console.error(`${colors.red}Validation failed:${colors.reset}`, message);
      process.exit(1);
    }

    return;
  }

  // Handle deployment-specific validation
  if (deploymentArg) {
    const deployment = deploymentArg.replace('--deployment=', '');
    const localesDir = resolve(
      projectRoot,
      `deployments/@domains/${deployment}/root/locales/en`
    );

    if (!existsSync(localesDir)) {
      console.error(`${colors.red}❌ Deployment not found or has no locales: ${deployment}${colors.reset}`);
      console.log(`\nExpected directory: ${localesDir}`);
      process.exit(1);
    }

    console.log(`Validating deployment: ${colors.cyan}${deployment}${colors.reset}\n`);

    const cmd = `npx tsx ${validateLocalesScript} --dir=${localesDir} ${otherFlags.join(' ')}`;

    try {
      const { stdout, stderr } = await execAsync(cmd);
      if (stdout) console.log(stdout);
      if (stderr) console.error(stderr);
    } catch (error: unknown) {
      const message = error instanceof Error ? error.message : String(error);
      console.error(`${colors.red}Validation failed:${colors.reset}`, message);
      process.exit(1);
    }

    return;
  }

  // Default: validate all deployments
  console.log(`Validating ${colors.cyan}all deployments${colors.reset}...\n`);

  const deploymentDirs = await glob('deployments/@domains/*/root/locales/en', {
    cwd: projectRoot,
    absolute: true,
  });

  if (deploymentDirs.length === 0) {
    console.error(`${colors.red}❌ No deployment locales found${colors.reset}`);
    process.exit(1);
  }

  console.log(`Found ${deploymentDirs.length} deployment(s) with locales\n`);

  let hasErrors = false;

  for (const dir of deploymentDirs) {
    const deploymentName = dir.split('/@domains/')[1]?.split('/')[0] || 'unknown';
    console.log(`${colors.blue}📦 ${deploymentName}${colors.reset}`);

    const cmd = `npx tsx ${validateLocalesScript} --dir=${dir} ${otherFlags.join(' ')}`;

    try {
      const { stdout, stderr } = await execAsync(cmd);
      if (stdout) console.log(stdout);
      if (stderr) console.error(stderr);
    } catch (error: unknown) {
      console.error(`${colors.red}✗ Validation failed for ${deploymentName}${colors.reset}`);
      hasErrors = true;
    }

    console.log(); // Blank line between deployments
  }

  if (hasErrors) {
    console.error(`${colors.red}❌ Some validations failed${colors.reset}`);
    process.exit(1);
  } else {
    console.log(`${colors.green}✓ All validations passed${colors.reset}`);
  }
}

main().catch((error) => {
  console.error('Unexpected error:', error);
  process.exit(1);
});