// 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"
	"io"
	"maps"
	"net/http"
	"net/url"
	"time"

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

func setupGinEndpoint(router *gin.Engine) {

	cfg := config.GetConfig()
	minioHost := fmt.Sprintf("%s:%d", cfg.MinioHost, cfg.MinioPort)

	s3group := router.Group("/s3")
	s3group.Any("/*path", func(c *gin.Context) {
		path := c.Param("path")
		minioURL := &url.URL{
			Scheme:   "http",
			Host:     minioHost, 
			Path:     path,
			RawQuery: c.Request.URL.RawQuery,
		}
		req, err := http.NewRequest(c.Request.Method, minioURL.String(), c.Request.Body); if err != nil {
			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "Failed to create request"})
			return
		}
		req = req.WithContext(c.Request.Context())
		maps.Copy(req.Header, c.Request.Header)
		req.Header.Set("Host", minioHost) 
		client := &http.Client{
			Timeout: time.Duration(cfg.MinioTimeout),
			CheckRedirect: func(req *http.Request, via []*http.Request) error {
				return http.ErrUseLastResponse
			},
		}
		resp, err := client.Do(req); if err != nil {
			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "Failed to forward request"})
			return
		}
		defer resp.Body.Close()
		for key, values := range resp.Header {
			for _, value := range values {
				c.Writer.Header().Add(key, value)
			}
		}
		c.Status(resp.StatusCode)
		_, err = io.Copy(c.Writer, resp.Body); if err != nil {
			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "Failed to copy response body"})
			return
		}
	})
}