#!/usr/bin/env node
/**
 * Executes a hook script only when enabled by ECC hook profile flags.
 *
 * Usage:
 *   node run-with-flags.js <hookId> <scriptRelativePath> [profilesCsv]
 */

'use strict';

const fs = require('fs');
const path = require('path');
const { spawnSync } = require('child_process');
const { isHookEnabled } = require('../lib/hook-flags');

const MAX_STDIN = 1024 * 1024;

function readStdinRaw() {
  return new Promise(resolve => {
    let raw = '';
    process.stdin.setEncoding('utf8');
    process.stdin.on('data', chunk => {
      if (raw.length < MAX_STDIN) {
        const remaining = MAX_STDIN - raw.length;
        raw += chunk.substring(0, remaining);
      }
    });
    process.stdin.on('end', () => resolve(raw));
    process.stdin.on('error', () => resolve(raw));
  });
}

function getPluginRoot() {
  if (process.env.CLAUDE_PLUGIN_ROOT && process.env.CLAUDE_PLUGIN_ROOT.trim()) {
    return process.env.CLAUDE_PLUGIN_ROOT;
  }
  return path.resolve(__dirname, '..', '..');
}

async function main() {
  const [, , hookId, relScriptPath, profilesCsv] = process.argv;
  const raw = await readStdinRaw();

  if (!hookId || !relScriptPath) {
    process.stdout.write(raw);
    process.exit(0);
  }

  if (!isHookEnabled(hookId, { profiles: profilesCsv })) {
    process.stdout.write(raw);
    process.exit(0);
  }

  const pluginRoot = getPluginRoot();
  const scriptPath = path.join(pluginRoot, relScriptPath);

  if (!fs.existsSync(scriptPath)) {
    process.stderr.write(`[Hook] Script not found for ${hookId}: ${scriptPath}\n`);
    process.stdout.write(raw);
    process.exit(0);
  }

  const result = spawnSync('node', [scriptPath], {
    input: raw,
    encoding: 'utf8',
    env: process.env,
    cwd: process.cwd(),
  });

  if (result.stdout) process.stdout.write(result.stdout);
  if (result.stderr) process.stderr.write(result.stderr);

  const code = Number.isInteger(result.status) ? result.status : 0;
  process.exit(code);
}

main().catch(err => {
  process.stderr.write(`[Hook] run-with-flags error: ${err.message}\n`);
  process.exit(0);
});