package handlers

import (
	"errors"
	"io"
	"net/http"
	"strings"

	"github.com/minio/minio-go/v7"
)

// ServePhoto streams a photo object from object storage.
// Used by tags.photo_url values of the form "/photos/tags/{id}.{ext}".
func (a *App) ServePhoto(w http.ResponseWriter, r *http.Request) {
	key := strings.TrimPrefix(r.PathValue("key"), "/")
	if key == "" || a.Storage == nil {
		http.NotFound(w, r)
		return
	}

	obj, ct, err := a.Storage.Get(r.Context(), key)
	if err != nil {
		var me minio.ErrorResponse
		if errors.As(err, &me) && me.Code == "NoSuchKey" {
			http.NotFound(w, r)
			return
		}
		http.Error(w, "photo unavailable", http.StatusInternalServerError)
		return
	}
	defer obj.Close()

	if ct == "" {
		ct = "application/octet-stream"
	}
	w.Header().Set("Content-Type", ct)
	w.Header().Set("Cache-Control", "public, max-age=86400")
	_, _ = io.Copy(w, obj)
}
