import { NextResponse } from 'next/server';
import { getSession } from '@/lib/auth';
import { createMCPClient } from '@/lib/control-center/mcp-client';
import type { ToolDefinition } from '@/types/control-center';

interface ToolsResponse {
  tools: ToolDefinition[];
  toolCount: number;
  mcpStatus: {
    connected: boolean;
    serverUrl: string;
  };
}

export async function GET() {
  // Check authentication
  const session = await getSession();
  if (!session) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  try {
    const mcpClient = await createMCPClient();

    if (!mcpClient) {
      return NextResponse.json({
        tools: [],
        toolCount: 0,
        mcpStatus: { connected: false, serverUrl: 'Not configured' }
      });
    }

    const isHealthy = await mcpClient.healthCheck();
    if (!isHealthy) {
      return NextResponse.json({
        tools: [],
        toolCount: 0,
        mcpStatus: { connected: false, serverUrl: 'Server not responding' }
      });
    }

    const tools = await mcpClient.getTools();

    const response: ToolsResponse = {
      tools,
      toolCount: tools.length,
      mcpStatus: { connected: true, serverUrl: 'http://localhost:8000' }
    };

    return NextResponse.json(response);
  } catch (error) {
    console.error('Failed to fetch tools:', error);
    return NextResponse.json(
      { error: 'Failed to fetch tools', details: error instanceof Error ? error.message : 'Unknown' },
      { status: 500 }
    );
  }
}