package git

import (
	"fmt"
	"net/http"
	"net/http/cgi"
)

// GitHttpBackendHandler a handler for git cgi
func GitHttpBackendHandler(reposDir, backendCommand string) http.Handler {
	projectDirEnv := fmt.Sprintf("GIT_PROJECT_ROOT=%v", reposDir)
	return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
		ctx := req.Context()
		uid := ctx.Value("urn")
		gitBackendHandler := &cgi.Handler{
			Path: "/bin/sh",
			Args: []string{"-c", backendCommand},
			Dir:  ".",
			Env: []string{
				projectDirEnv,
				// TODO we don't want to export all
				"GIT_HTTP_EXPORT_ALL=1",
				fmt.Sprintf("REMOTE_USER=%s", uid),
			},
		}
		gitBackendHandler.ServeHTTP(rw, req)
	})
}