/*
 * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
 *
 * This work is published and licensed under a Creative Commons
 * Attribution-NonCommercial-NoDerivatives 4.0 International License.
 *
 * Distribution of this work is permitted, but commercial use and
 * modifications are strictly prohibited.
 */
package imageoper

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

type GetRefererParams struct {
	Name   string
	Digest string
}
type GetRefererResult struct {
	Reference string
}

func (oper *Operator) GetReferer(ctx context.Context, params *GetRefererParams) (*GetRefererResult, int, error) {
	var err error
	res := &GetRefererResult{}

	if params.Name == "" {
		err = fmt.Errorf("Empty name")
		return res, http.StatusBadRequest, err
	}
	if params.Digest == "" {
		err = fmt.Errorf("Empty digest")
		return res, http.StatusBadRequest, err
	}
	manifests, err := oper.mdb.GetReferer(ctx, params.Name, params.Digest)
	if err != nil {
		return res, http.StatusInternalServerError, err
	}
	if len(manifests) == 0 {
		return res, http.StatusNotFound, err
	}
	res.Reference = manifests[0].Reference
	return res, http.StatusOK, err
}