#!/usr/bin/env node

// Agent Health Monitor for OpenClaw
// Monitors agent crashes, errors, and service health
// Sends notifications via configured channels (Telegram, etc.)

const fs = require('fs');
const path = require('path');

class AgentHealthMonitor {
  constructor() {
    this.config = this.loadConfig();
    this.logDir = '/root/.openclaw/workspace/logs/agents';
    this.ensureLogDir();
  }

  loadConfig() {
    try {
      const configPath = '/root/.openclaw/openclaw.json';
      return JSON.parse(fs.readFileSync(configPath, 'utf8'));
    } catch (error) {
      console.error('Failed to load OpenClaw config:', error);
      return {};
    }
  }

  ensureLogDir() {
    if (!fs.existsSync(this.logDir)) {
      fs.mkdirSync(this.logDir, { recursive: true });
    }
  }

  async sendNotification(message, severity = 'error') {
    // Log to file first
    const timestamp = new Date().toISOString();
    const logEntry = `[${timestamp}] [${severity.toUpperCase()}] ${message}\n`;
    
    const logFile = path.join(this.logDir, `health-${new Date().toISOString().split('T')[0]}.log`);
    fs.appendFileSync(logFile, logEntry);

    // Send via Telegram if configured
    if (this.config.channels?.telegram?.enabled) {
      await this.sendTelegramNotification(message, severity);
    }
  }

  async sendTelegramNotification(message, severity) {
    const botToken = this.config.channels.telegram.botToken;
    const chatId = '5237946060'; // Your Telegram ID
    
    if (!botToken) {
      console.error('Telegram bot token not configured');
      return;
    }

    try {
      const url = `https://api.telegram.org/bot${botToken}/sendMessage`;
      const payload = {
        chat_id: chatId,
        text: `🚨 OpenClaw Agent Alert (${severity})\n\n${message}`,
        parse_mode: 'Markdown'
      };

      const response = await fetch(url, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(payload)
      });

      if (!response.ok) {
        console.error('Failed to send Telegram notification:', await response.text());
      }
    } catch (error) {
      console.error('Telegram notification error:', error);
    }
  }

  monitorProcess(processName, checkFunction) {
    // Set up process monitoring
    process.on('uncaughtException', async (error) => {
      await this.sendNotification(
        `Uncaught exception in ${processName}:\n${error.stack || error.message}`,
        'critical'
      );
      process.exit(1);
    });

    process.on('unhandledRejection', async (reason, promise) => {
      await this.sendNotification(
        `Unhandled rejection in ${processName}:\nReason: ${reason}\nPromise: ${promise}`,
        'error'
      );
    });

    // Custom health check
    if (checkFunction) {
      setInterval(async () => {
        try {
          const isHealthy = await checkFunction();
          if (!isHealthy) {
            await this.sendNotification(
              `${processName} health check failed`,
              'warning'
            );
          }
        } catch (error) {
          await this.sendNotification(
            `${processName} health check error: ${error.message}`,
            'error'
          );
        }
      }, 30000); // Check every 30 seconds
    }
  }
}

module.exports = AgentHealthMonitor;