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

/**
 * 通用的 API 代理路由
 */
export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  const { path } = await params;
  const targetPath = path.join('/');
  const searchParams = request.nextUrl.search;
  const targetUrl = `http://localhost:8000/api/${targetPath}${searchParams}`;

  const headers: Record<string, string> = {};
  request.headers.forEach((value, key) => {
    if (key.toLowerCase() !== 'host') {
      headers[key] = value;
    }
  });

  try {
    const response = await fetch(targetUrl, { headers });
    const data = await response.json();
    return NextResponse.json(data, { status: response.status });
  } catch (error) {
    return NextResponse.json({ detail: 'Proxy error' }, { status: 502 });
  }
}

export async function POST(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  const { path } = await params;
  const targetPath = path.join('/');
  const searchParams = request.nextUrl.search;
  const targetUrl = `http://localhost:8000/api/${targetPath}${searchParams}`;
  const body = await request.text();

  const headers: Record<string, string> = {};
  request.headers.forEach((value, key) => {
    if (key.toLowerCase() !== 'host') {
      headers[key] = value;
    }
  });

  try {
    const response = await fetch(targetUrl, {
      method: 'POST',
      headers,
      body,
    });
    const data = await response.json();
    return NextResponse.json(data, { status: response.status });
  } catch (error) {
    return NextResponse.json({ detail: 'Proxy error' }, { status: 502 });
  }
}

export async function PUT(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  const { path } = await params;
  const targetPath = path.join('/');
  const searchParams = request.nextUrl.search;
  const targetUrl = `http://localhost:8000/api/${targetPath}${searchParams}`;
  const body = await request.text();

  const headers: Record<string, string> = {};
  request.headers.forEach((value, key) => {
    if (key.toLowerCase() !== 'host') {
      headers[key] = value;
    }
  });

  try {
    const response = await fetch(targetUrl, {
      method: 'PUT',
      headers,
      body,
    });
    const data = await response.json();
    return NextResponse.json(data, { status: response.status });
  } catch (error) {
    return NextResponse.json({ detail: 'Proxy error' }, { status: 502 });
  }
}

export async function PATCH(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  const { path } = await params;
  const targetPath = path.join('/');
  const searchParams = request.nextUrl.search;
  const targetUrl = `http://localhost:8000/api/${targetPath}${searchParams}`;
  const body = await request.text();

  const headers: Record<string, string> = {};
  request.headers.forEach((value, key) => {
    if (key.toLowerCase() !== 'host') {
      headers[key] = value;
    }
  });

  try {
    const response = await fetch(targetUrl, {
      method: 'PATCH',
      headers,
      body,
    });
    const data = await response.json();
    return NextResponse.json(data, { status: response.status });
  } catch (error) {
    return NextResponse.json({ detail: 'Proxy error' }, { status: 502 });
  }
}

export async function DELETE(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  const { path } = await params;
  const targetPath = path.join('/');
  const searchParams = request.nextUrl.search;
  const targetUrl = `http://localhost:8000/api/${targetPath}${searchParams}`;

  const headers: Record<string, string> = {};
  request.headers.forEach((value, key) => {
    if (key.toLowerCase() !== 'host') {
      headers[key] = value;
    }
  });

  try {
    const response = await fetch(targetUrl, {
      method: 'DELETE',
      headers,
    });
    const data = await response.json();
    return NextResponse.json(data, { status: response.status });
  } catch (error) {
    return NextResponse.json({ detail: 'Proxy error' }, { status: 502 });
  }
}