// Copyright (c) 2025 Nikolai Papin
//
// This file is part of Easywish
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
// the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package minioclient

import (
	"easywish/config"
	"fmt"
	"net/http"
	"net/http/httputil"
	"net/url"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
)

func setupGinEndpoint(router *gin.Engine) {
	cfg := config.GetConfig()
	minioHost := fmt.Sprintf("%s:%d", cfg.MinioHost, cfg.MinioPort)

	proxy := &httputil.ReverseProxy{
		Director: func(req *http.Request) {
			path := strings.TrimPrefix(req.URL.Path, "/s3")
			targetURL := &url.URL{
				Scheme:   "http",
				Host:     minioHost,
				Path:     path,
				RawQuery: req.URL.RawQuery,
			}

			req.URL = targetURL
			req.Host = minioHost
			req.Header.Set("Host", minioHost)

			req.Header.Del("X-Forwarded-For")
			req.Header.Del("X-Forwarded-Host")
			req.Header.Del("X-Forwarded-Proto")
		},
		Transport: &http.Transport{
			ResponseHeaderTimeout: time.Duration(cfg.MinioTimeout),
		},
		ErrorHandler: func(w http.ResponseWriter, r *http.Request, err error) {
			w.Header().Set("Content-Type", "application/json")
			w.WriteHeader(http.StatusInternalServerError)
			w.Write([]byte(`{"error": "Failed to forward request"}`))
			fmt.Printf("Proxy error: %v\n", err)
		},
	}

	s3group := router.Group("/s3")
	s3group.Any("/*path", func(c *gin.Context) {
		proxy.ServeHTTP(c.Writer, c.Request)
	})
}