/**
 * HTTP Server for Onebox
 *
 * Serves REST API and Angular UI
 */

import * as plugins from './onebox.plugins.ts';
import { logger } from './onebox.logging.ts';
import type { Onebox } from './onebox.classes.onebox.ts';
import type { IApiResponse } from './onebox.types.ts';

export class OneboxHttpServer {
  private oneboxRef: Onebox;
  private server: Deno.HttpServer | null = null;
  private port = 3000;

  constructor(oneboxRef: Onebox) {
    this.oneboxRef = oneboxRef;
  }

  /**
   * Start HTTP server
   */
  async start(port?: number): Promise<void> {
    try {
      if (this.server) {
        logger.warn('HTTP server already running');
        return;
      }

      this.port = port || 3000;

      logger.info(`Starting HTTP server on port ${this.port}...`);

      this.server = Deno.serve({ port: this.port }, (req) => this.handleRequest(req));

      logger.success(`HTTP server started on http://localhost:${this.port}`);
    } catch (error) {
      logger.error(`Failed to start HTTP server: ${error.message}`);
      throw error;
    }
  }

  /**
   * Stop HTTP server
   */
  async stop(): Promise<void> {
    try {
      if (!this.server) {
        return;
      }

      logger.info('Stopping HTTP server...');
      await this.server.shutdown();
      this.server = null;
      logger.success('HTTP server stopped');
    } catch (error) {
      logger.error(`Failed to stop HTTP server: ${error.message}`);
      throw error;
    }
  }

  /**
   * Handle HTTP request
   */
  private async handleRequest(req: Request): Promise<Response> {
    const url = new URL(req.url);
    const path = url.pathname;

    logger.debug(`${req.method} ${path}`);

    try {
      // API routes
      if (path.startsWith('/api/')) {
        return await this.handleApiRequest(req, path);
      }

      // Serve Angular UI (TODO: implement static file serving)
      return new Response('Onebox API - UI coming soon', {
        headers: { 'Content-Type': 'text/plain' },
      });
    } catch (error) {
      logger.error(`Request error: ${error.message}`);
      return this.jsonResponse({ success: false, error: error.message }, 500);
    }
  }

  /**
   * Handle API requests
   */
  private async handleApiRequest(req: Request, path: string): Promise<Response> {
    const method = req.method;

    // Auth check (simplified - should use proper JWT middleware)
    // Skip auth for login endpoint
    if (path !== '/api/auth/login') {
      const authHeader = req.headers.get('Authorization');
      if (!authHeader || !authHeader.startsWith('Bearer ')) {
        return this.jsonResponse({ success: false, error: 'Unauthorized' }, 401);
      }
    }

    // Route to appropriate handler
    if (path === '/api/status' && method === 'GET') {
      return await this.handleStatusRequest();
    } else if (path === '/api/services' && method === 'GET') {
      return await this.handleListServicesRequest();
    } else if (path === '/api/services' && method === 'POST') {
      return await this.handleDeployServiceRequest(req);
    } else if (path.match(/^\/api\/services\/[^/]+$/) && method === 'GET') {
      const name = path.split('/').pop()!;
      return await this.handleGetServiceRequest(name);
    } else if (path.match(/^\/api\/services\/[^/]+$/) && method === 'DELETE') {
      const name = path.split('/').pop()!;
      return await this.handleDeleteServiceRequest(name);
    } else if (path.match(/^\/api\/services\/[^/]+\/start$/) && method === 'POST') {
      const name = path.split('/')[3];
      return await this.handleStartServiceRequest(name);
    } else if (path.match(/^\/api\/services\/[^/]+\/stop$/) && method === 'POST') {
      const name = path.split('/')[3];
      return await this.handleStopServiceRequest(name);
    } else if (path.match(/^\/api\/services\/[^/]+\/restart$/) && method === 'POST') {
      const name = path.split('/')[3];
      return await this.handleRestartServiceRequest(name);
    } else if (path.match(/^\/api\/services\/[^/]+\/logs$/) && method === 'GET') {
      const name = path.split('/')[3];
      return await this.handleGetLogsRequest(name);
    } else {
      return this.jsonResponse({ success: false, error: 'Not found' }, 404);
    }
  }

  // API Handlers

  private async handleStatusRequest(): Promise<Response> {
    const status = await this.oneboxRef.getSystemStatus();
    return this.jsonResponse({ success: true, data: status });
  }

  private async handleListServicesRequest(): Promise<Response> {
    const services = this.oneboxRef.services.listServices();
    return this.jsonResponse({ success: true, data: services });
  }

  private async handleDeployServiceRequest(req: Request): Promise<Response> {
    const body = await req.json();
    const service = await this.oneboxRef.services.deployService(body);
    return this.jsonResponse({ success: true, data: service });
  }

  private async handleGetServiceRequest(name: string): Promise<Response> {
    const service = this.oneboxRef.services.getService(name);
    if (!service) {
      return this.jsonResponse({ success: false, error: 'Service not found' }, 404);
    }
    return this.jsonResponse({ success: true, data: service });
  }

  private async handleDeleteServiceRequest(name: string): Promise<Response> {
    await this.oneboxRef.services.removeService(name);
    return this.jsonResponse({ success: true, message: 'Service removed' });
  }

  private async handleStartServiceRequest(name: string): Promise<Response> {
    await this.oneboxRef.services.startService(name);
    return this.jsonResponse({ success: true, message: 'Service started' });
  }

  private async handleStopServiceRequest(name: string): Promise<Response> {
    await this.oneboxRef.services.stopService(name);
    return this.jsonResponse({ success: true, message: 'Service stopped' });
  }

  private async handleRestartServiceRequest(name: string): Promise<Response> {
    await this.oneboxRef.services.restartService(name);
    return this.jsonResponse({ success: true, message: 'Service restarted' });
  }

  private async handleGetLogsRequest(name: string): Promise<Response> {
    const logs = await this.oneboxRef.services.getServiceLogs(name);
    return this.jsonResponse({ success: true, data: logs });
  }

  /**
   * Helper to create JSON response
   */
  private jsonResponse(data: IApiResponse, status = 200): Response {
    return new Response(JSON.stringify(data), {
      status,
      headers: { 'Content-Type': 'application/json' },
    });
  }
}