import { NextRequest, NextResponse } from 'next/server';

/**
 * API Route proxy para Dolibarr
 * Protege la API key manteniéndola en el servidor
 */
export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  try {
    // Await params en Next.js 16
    const resolvedParams = await params;
    
    // Construir el endpoint desde los parámetros de ruta
    const endpoint = resolvedParams.path.join('/');
    
    // Obtener API key y URL del servidor (sin NEXT_PUBLIC_)
    const apiUrl = process.env.DOLIBARR_API_URL || process.env.NEXT_PUBLIC_API_URL;
    const apiKey = process.env.DOLIBARR_API_KEY || process.env.NEXT_PUBLIC_DOLIBARR_API_KEY;

    if (!apiUrl || !apiKey) {
      console.error('Missing Dolibarr configuration');
      return NextResponse.json(
        { error: 'Server configuration error' },
        { status: 500 }
      );
    }

    // Construir URL completa
    const url = `${apiUrl}/${endpoint}?DOLAPIKEY=${apiKey}`;

    // Realizar la petición a Dolibarr
    const response = await fetch(url, {
      method: 'GET',
      headers: {
        'Accept': 'application/json',
      },
      // Sin cache en servidor para evitar datos antiguos
      cache: 'no-store'
    });

    if (!response.ok) {
      const errorText = await response.text();
      console.error('Dolibarr API error:', response.status, errorText);
      
      return NextResponse.json(
        { error: 'Error al comunicarse con Dolibarr', details: errorText },
        { status: response.status }
      );
    }

    const data = await response.json();
    
    return NextResponse.json(data);
  } catch (error) {
    console.error('Error in Dolibarr API route:', error);
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    );
  }
}

/**
 * Método POST para crear recursos en Dolibarr
 */
export async function POST(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  try {
    // Await params en Next.js 16
    const resolvedParams = await params;
    
    const endpoint = resolvedParams.path.join('/');
    const body = await request.json();
    
    const apiUrl = process.env.DOLIBARR_API_URL || process.env.NEXT_PUBLIC_API_URL;
    const apiKey = process.env.DOLIBARR_API_KEY || process.env.NEXT_PUBLIC_DOLIBARR_API_KEY;

    if (!apiUrl || !apiKey) {
      return NextResponse.json(
        { error: 'Server configuration error' },
        { status: 500 }
      );
    }

    const url = `${apiUrl}/${endpoint}?DOLAPIKEY=${apiKey}`;

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

    const responseText = await response.text();

    if (!response.ok) {
      console.error('Dolibarr API error:', response.status, responseText);
      
      // Intentar parsear como JSON para obtener detalles del error
      let errorDetails = responseText;
      try {
        const errorJson = JSON.parse(responseText);
        errorDetails = errorJson.error?.message || errorJson.error || responseText;
      } catch {
        // Mantener el texto original si no es JSON
      }
      
      return NextResponse.json(
        { error: errorDetails },
        { status: response.status }
      );
    }

    // Parsear respuesta exitosa
    let data;
    try {
      data = JSON.parse(responseText);
    } catch {
      data = responseText;
    }
    
    return NextResponse.json(data);
  } catch (error) {
    console.error('Error in Dolibarr API route:', error);
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    );
  }
}

/**
 * Método PUT para actualizar recursos en Dolibarr
 */
export async function PUT(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  try {
    const resolvedParams = await params;
    
    const endpoint = resolvedParams.path.join('/');
    const body = await request.json();
    
    const apiUrl = process.env.DOLIBARR_API_URL || process.env.NEXT_PUBLIC_API_URL;
    const apiKey = process.env.DOLIBARR_API_KEY || process.env.NEXT_PUBLIC_DOLIBARR_API_KEY;

    if (!apiUrl || !apiKey) {
      return NextResponse.json(
        { error: 'Server configuration error' },
        { status: 500 }
      );
    }

    const url = `${apiUrl}/${endpoint}?DOLAPIKEY=${apiKey}`;

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

    const responseText = await response.text();

    if (!response.ok) {
      console.error('Dolibarr API error:', response.status, responseText);
      
      let errorDetails = responseText;
      try {
        const errorJson = JSON.parse(responseText);
        errorDetails = errorJson.error?.message || errorJson.error || responseText;
      } catch {
        // Mantener el texto original si no es JSON
      }
      
      return NextResponse.json(
        { error: errorDetails },
        { status: response.status }
      );
    }

    let data;
    try {
      data = JSON.parse(responseText);
    } catch {
      data = responseText;
    }
    
    return NextResponse.json(data);
  } catch (error) {
    console.error('Error in Dolibarr API route:', error);
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    );
  }
}

/**
 * Método DELETE para eliminar recursos en Dolibarr
 */
export async function DELETE(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  try {
    const resolvedParams = await params;
    
    const endpoint = resolvedParams.path.join('/');
    
    const apiUrl = process.env.DOLIBARR_API_URL || process.env.NEXT_PUBLIC_API_URL;
    const apiKey = process.env.DOLIBARR_API_KEY || process.env.NEXT_PUBLIC_DOLIBARR_API_KEY;

    if (!apiUrl || !apiKey) {
      return NextResponse.json(
        { error: 'Server configuration error' },
        { status: 500 }
      );
    }

    const url = `${apiUrl}/${endpoint}?DOLAPIKEY=${apiKey}`;

    const response = await fetch(url, {
      method: 'DELETE',
      headers: {
        'Accept': 'application/json',
      },
    });

    if (!response.ok) {
      const responseText = await response.text();
      console.error('Dolibarr API error:', response.status, responseText);
      
      let errorDetails = responseText;
      try {
        const errorJson = JSON.parse(responseText);
        errorDetails = errorJson.error?.message || errorJson.error || responseText;
      } catch {
        // Mantener el texto original si no es JSON
      }
      
      return NextResponse.json(
        { error: errorDetails },
        { status: response.status }
      );
    }

    // DELETE suele devolver vacío o el ID eliminado
    const responseText = await response.text();
    let data;
    try {
      data = responseText ? JSON.parse(responseText) : { success: true };
    } catch {
      data = { success: true };
    }
    
    return NextResponse.json(data);
  } catch (error) {
    console.error('Error in Dolibarr API route:', error);
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    );
  }
}