package v1

import (
	"errors"

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

func containsValue(m map[string]string, value string) (string, error) {
	for _, v := range m {
		if v == value {
			return v, nil
		}
	}
	return value, errors.New("value is not in the provided map")
}

func (h *Handler) VerifyAuthentication(ctx *gin.Context) (string, error) {
	header := ctx.GetHeader("X-API-KEY")
	if header != "" {
		return containsValue(h.services.Config.Auth.ApiKeys, header)
	}

	key := ctx.Query("api_key")
	if key != "" {
		return containsValue(h.services.Config.Auth.ApiKeys, key)
	}

	return "", errors.New("Missing API key")
}