/**
 * DougBot Bridge - Entry Point
 *
 * Connects to Minecraft Bedrock servers (offline, online, or Realm)
 * and exposes a WebSocket API for the Python controller.
 *
 * Usage:
 *   node dist/index.js --host <host> --port <port> --username <name> [--ws-port <ws_port>] [--offline]
 *   node dist/index.js --email <email> --host <host> --port <port> [--ws-port <ws_port>]
 *   node dist/index.js --email <email> --realm [--realm-id <id>] [--ws-port <ws_port>]
 */

import { BedrockClient, ClientOptions } from './client';
import { BridgeWSServer } from './ws_server';
import { ChatAction } from './actions/chat';
import { MovementAction } from './actions/movement';
import { EntityTracker } from './world/entity_tracker';
import { buildAuthOptions, buildRealmOptions, listRealms } from './auth';
import { createLogger, setLogLevel, LogLevel } from './utils/logger';

const log = createLogger('main');

// ============================================================
// Parse command line arguments
// ============================================================

function parseArgs(): Record<string, string> {
  const args = process.argv.slice(2);
  const parsed: Record<string, string> = {};

  for (let i = 0; i < args.length; i++) {
    if (args[i].startsWith('--')) {
      const key = args[i].substring(2);
      if (i + 1 < args.length && !args[i + 1].startsWith('--')) {
        parsed[key] = args[i + 1];
        i++;
      } else {
        parsed[key] = 'true';
      }
    }
  }

  return parsed;
}

// ============================================================
// Main
// ============================================================

async function main(): Promise<void> {
  const args = parseArgs();

  if (args['debug'] === 'true') {
    setLogLevel(LogLevel.DEBUG);
  }

  const wsPort = parseInt(args['ws-port'] || '8765', 10);
  const connType = args['conn-type'] || (args['offline'] === 'true' ? 'offline' : (args['realm'] === 'true' ? 'realm' : 'online'));

  log.info('DougBot Bridge starting', {
    connType,
    host: args['host'] || '(realm)',
    port: args['port'] || '(realm)',
    username: args['username'] || args['email'] || 'Doug',
    wsPort,
  });

  // Create the WebSocket server
  const wsServer = new BridgeWSServer(wsPort);

  // Build client options based on connection type
  let clientOptions: ClientOptions;
  let bedrockClient: BedrockClient;

  if (connType === 'offline') {
    // ── Offline: Direct connection, no auth ──
    clientOptions = {
      host: args['host'] || '127.0.0.1',
      port: parseInt(args['port'] || '19132', 10),
      username: args['username'] || 'Doug',
      offline: true,
    };
  } else if (connType === 'realm') {
    // ── Realm: Xbox Live auth + Realm connection ──
    const email = args['email'];
    if (!email) {
      log.error('Realm connection requires --email');
      process.exit(1);
    }

    const authOpts = buildRealmOptions(
      {
        email,
        onDeviceCode: (code, url) => {
          // Emit device code as an event so Python GUI can display it
          wsServer.emitEvent('auth_device_code', { code, url });
        },
      },
      args['realm-id'] || undefined,
    );

    clientOptions = {
      host: '',  // Will be resolved by Realm auth
      port: 0,
      username: email,
      offline: false,
      extraOptions: authOpts,
    };
  } else {
    // ── Online: Xbox Live auth + direct server ──
    const email = args['email'];
    if (!email) {
      log.error('Online connection requires --email');
      process.exit(1);
    }

    const authOpts = buildAuthOptions({
      email,
      onDeviceCode: (code, url) => {
        wsServer.emitEvent('auth_device_code', { code, url });
      },
    });

    clientOptions = {
      host: args['host'] || '127.0.0.1',
      port: parseInt(args['port'] || '19132', 10),
      username: email,
      offline: false,
      extraOptions: authOpts,
    };
  }

  bedrockClient = new BedrockClient(clientOptions);
  const chatAction = new ChatAction(bedrockClient);
  const movementAction = new MovementAction(bedrockClient);
  movementAction.setOnArrival(() => {
    wsServer.emitEvent('movement_complete', {});
  });
  const entityTracker = new EntityTracker();

  // Wire up entity tracking from bedrock events
  bedrockClient.on('entity_spawned', (data: any) => {
    entityTracker.addEntity(data.entityId, data.type, data.position, data.name);
  });
  bedrockClient.on('entity_removed', (data: any) => {
    entityTracker.removeEntity(data.entityId);
  });

  // ============================================================
  // Wire up bridge action handler
  // ============================================================

  wsServer.setActionHandler(async (action, params) => {
    switch (action) {
      case 'status':
        return {
          status: 'success',
          data: {
            connected: bedrockClient.state.connected,
            spawned: bedrockClient.state.spawned,
            position: bedrockClient.state.position,
            health: bedrockClient.state.health,
            food: bedrockClient.state.food,
            gameTime: bedrockClient.state.gameTime,
            dayTime: bedrockClient.state.dayTime,
          },
        };

      case 'connect':
        try {
          await bedrockClient.connect();
          return { status: 'success', data: { message: 'Connecting to server...' } };
        } catch (err: any) {
          return { status: 'error', error: err.message };
        }

      case 'disconnect':
        bedrockClient.disconnect();
        return { status: 'success', data: { message: 'Disconnected' } };

      case 'send_chat':
        const chatResult = chatAction.sendChat(params.message || '');
        return {
          status: chatResult.success ? 'success' : 'error',
          data: chatResult.success ? {} : undefined,
          error: chatResult.error,
        };

      case 'get_position':
        return {
          status: 'success',
          data: { position: bedrockClient.state.position },
        };

      case 'get_health':
        return {
          status: 'success',
          data: { health: bedrockClient.state.health, food: bedrockClient.state.food },
        };

      case 'get_time':
        return {
          status: 'success',
          data: { gameTime: bedrockClient.state.gameTime, dayTime: bedrockClient.state.dayTime },
        };

      case 'move_to':
        // Use /tp for reliable movement (works on all server types)
        try {
          bedrockClient.teleportTo(params.x || 0, params.y || 0, params.z || 0);
          return { status: 'success' };
        } catch (err: any) {
          return { status: 'error', error: err.message };
        }

      case 'move_relative':
        try {
          bedrockClient.teleportRelative(params.dx || 0, params.dy || 0, params.dz || 0);
          return { status: 'success' };
        } catch (err: any) {
          return { status: 'error', error: err.message };
        }

      case 'send_command':
        try {
          bedrockClient.sendCommand(params.command || '');
          return { status: 'success' };
        } catch (err: any) {
          return { status: 'error', error: err.message };
        }

      case 'stop':
        movementAction.stop();
        return { status: 'success' };

      case 'look_at':
        movementAction.lookAt({ x: params.x || 0, y: params.y || 0, z: params.z || 0 });
        return { status: 'success' };

      case 'get_nearby_entities':
        const nearby = entityTracker.getNearbyEntities(
          bedrockClient.state.position,
          params.radius || 32,
        );
        return { status: 'success', data: { entities: nearby } };

      case 'get_nearby_hostiles':
        const hostiles = entityTracker.getNearbyHostiles(
          bedrockClient.state.position,
          params.radius || 16,
        );
        return { status: 'success', data: { hostiles } };

      case 'get_players':
        return {
          status: 'success',
          data: { players: entityTracker.getPlayerNames() },
        };

      case 'list_realms':
        try {
          const email = params.email;
          if (!email) {
            return { status: 'error', error: 'Email is required to list Realms' };
          }

          const realms = await listRealms({
            email,
            onDeviceCode: (code, url) => {
              wsServer.emitEvent('auth_device_code', { code, url });
            },
          });

          return { status: 'success', data: { realms } };
        } catch (err: any) {
          return { status: 'error', error: err.message };
        }

      default:
        log.warn(`Unhandled action: ${action}`);
        return {
          status: 'error',
          error: `Unknown action: ${action}`,
        };
    }
  });

  // ============================================================
  // Forward Bedrock events to WebSocket
  // ============================================================

  const forwardEvents = [
    'chat_message', 'health_changed', 'entity_spawned', 'entity_removed',
    'player_joined', 'player_left', 'damage_taken', 'death',
    'time_update', 'spawn_complete', 'connected', 'disconnected',
    'error', 'respawn',
  ] as const;

  for (const event of forwardEvents) {
    bedrockClient.on(event, (data: any) => {
      wsServer.emitEvent(event as any, data || {});
    });
  }

  // ============================================================
  // Start
  // ============================================================

  try {
    await wsServer.start();
    await bedrockClient.connect();
    log.info('Bridge is running. Waiting for Python controller...');
  } catch (err: any) {
    log.error('Failed to start bridge', { error: err.message });
    process.exit(1);
  }

  // Graceful shutdown
  const shutdown = () => {
    log.info('Shutting down...');
    bedrockClient.disconnect();
    wsServer.stop();
    process.exit(0);
  };

  process.on('SIGINT', shutdown);
  process.on('SIGTERM', shutdown);
  process.on('unhandledRejection', (reason: any) => {
    log.error('Unhandled promise rejection', { error: reason?.message || String(reason), stack: reason?.stack || '' });
  });
  process.on('uncaughtException', (err) => {
    log.error('Uncaught exception', { error: err.message, stack: err.stack });
    shutdown();
  });
}

main().catch((err) => {
  log.error('Fatal error', { error: err.message });
  process.exit(1);
});