// Copyright 2024 Florian Beisel
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package api

import (
	"errors"
	"net/http"

	"git.beisel.it/florian/hostname-service/rules"
	"github.com/gin-gonic/gin"
)

func ListAvailableRules(c *gin.Context) {
	descriptions := make(map[string]string)
	for category, descriptor := range rules.RulesRegistry {
		descriptions[category] = descriptor.Description
	}
	c.JSON(http.StatusOK, descriptions)
}

func getHostnameRuleByCategory(category string) (rules.HostnameRule, error) {
	if descriptor, exists := rules.RulesRegistry[category]; exists {
		return descriptor.Factory(), nil
	}
	return nil, errors.New("unknown category")
}