import type { BrowserWindow } from 'electron';
import { Redis } from 'ioredis';
import { REDIS_CHANNELS, REDIS_CONFIG, logRedisConfig } from '../config/redis';
import { getRedisChannelHandler } from '../handlers/redis-handlers';

let redisSubscriber: Redis | null = null;

/**
 * Initialize Redis connection
 */
export function connectRedis(): void {
  try {
    // Log configuration info
    logRedisConfig();
    
    redisSubscriber = new Redis(REDIS_CONFIG);
    
    redisSubscriber.on('error', (error) => {
      console.error('[REDIS] Connection error:', error);
    });

    console.info('[REDIS] Initialized');
  }
  catch (error) {
    console.error('[REDIS] Init failed:', error);
  }
}

/**
 * Set up Redis pub/sub with message handlers
 */
export function setupRedisPubSub(mainWindow: BrowserWindow): void {
  if (!redisSubscriber) {
    console.error('[REDIS] Not initialized');
    return;
  }

  try {
    redisSubscriber.subscribe(...REDIS_CHANNELS);

    // Handle incoming messages
    redisSubscriber.on('message', (channel: string, message: string) => {
      try {
        const data = JSON.parse(message);
        const handler = getRedisChannelHandler(channel);

        if (handler) {
          handler(mainWindow, data);
        } else {
          console.warn(`[REDIS] No handler for '${channel}'`);
        }
      }
      catch (error) {
        console.error(`[REDIS] Parse error on '${channel}':`, error);
      }
    });

    console.info('[REDIS] PubSub ready');
  }
  catch (error) {
    console.error('[REDIS] Setup error:', error);
  }
}

/**
 * Disconnect Redis
 */
export function disconnectRedis(): void {
  if (redisSubscriber) {
    redisSubscriber.disconnect();
    redisSubscriber = null;
    console.info('[REDIS] Disconnected');
  }
}

/**
 * Get Redis connection status
 */
export function getRedisStatus(): 'connected' | 'disconnected' | 'not_initialized' {
  if (!redisSubscriber) return 'not_initialized';
  return redisSubscriber.status === 'ready' ? 'connected' : 'disconnected';
}

/**
 * Test Redis connection by trying to connect
 */
export async function testRedisConnection(): Promise<boolean> {
  if (!redisSubscriber) {
    console.error('[REDIS] Not initialized');
    return false;
  }

  try {
    await redisSubscriber.connect();
    return true;
  } catch (error) {
    console.error('[REDIS] Test failed:', error);
    return false;
  }
}