/**
 * File-based logging for the native host.
 * Writes timestamped lines to holesail-browser.log (or BRIDGE_SWARM_LOG override)
 * and to process.stderr for native messaging host visibility.
 */

const path = require('bare-path');
const fs = require('bare-fs');
const { BASE_DIR } = require('./paths.js');

const DEBUG = process.env.HOLESAIL_DEBUG === '1' || process.env.HOLESAIL_DEBUG === 'true';
const LOG_FILE = path.join(BASE_DIR, 'holesail-browser.log');

let logStream = null;

function getLogStream() {
  if (!logStream) {
    try {
      const logPath = process.env.BRIDGE_SWARM_LOG || LOG_FILE;
      logStream = fs.createWriteStream(logPath, { flags: 'a' });
    } catch (e) {
      return null;
    }
  }
  return logStream;
}

function log(...args) {
  const stream = getLogStream();
  if (stream) {
    const msg = '[' + new Date().toISOString() + '] ' + args.map(a => typeof a === 'object' ? JSON.stringify(a) : String(a)).join(' ') + '\n';
    stream.write(msg);
  }
  if (process.stderr) {
    process.stderr.write('[' + new Date().toISOString() + '] ' + args.join(' ') + '\n');
  }
}

function debugLog(...args) {
  if (!DEBUG) return;
  const msg = '[host:debug] ' + args.map(a => typeof a === 'object' ? JSON.stringify(a) : String(a)).join(' ');
  if (process.stderr) process.stderr.write(msg + '\n');
  const stream = getLogStream();
  if (stream) stream.write('[' + new Date().toISOString() + '] ' + msg + '\n');
}

module.exports = { log, debugLog };