// Copyright 2022 Google LLC.
// 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
//
//     https://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 util provides helper functions for the signer.
package util

import (
	"encoding/json"
	"io"
	"os"
)

// EnterpriseCertificateConfig contains parameters for initializing signer.
type EnterpriseCertificateConfig struct {
	CertConfigs CertConfigs `json:"cert_configs"`
}

// CertConfigs is a container for various ECP Configs.
type CertConfigs struct {
	WindowsStore WindowsStore `json:"windows_store"`
}

// WindowsStore contains parameters describing the certificate to use.
type WindowsStore struct {
	Issuer   string `json:"issuer"`
	Store    string `json:"store"`
	Provider string `json:"provider"`
}

// LoadConfig retrieves the ECP config file.
func LoadConfig(configFilePath string) (config EnterpriseCertificateConfig, err error) {
	jsonFile, err := os.Open(configFilePath)
	if err != nil {
		return EnterpriseCertificateConfig{}, err
	}

	byteValue, err := io.ReadAll(jsonFile)
	if err != nil {
		return EnterpriseCertificateConfig{}, err
	}
	err = json.Unmarshal(byteValue, &config)
	if err != nil {
		return EnterpriseCertificateConfig{}, err
	}
	return config, nil

}