package configuration

import (
	"os"
	"strings"

	"github.com/pkg/errors"
	"gopkg.in/yaml.v3"
)

type Configuration struct {
	ListenOn string `yaml:"listen_on"`
	Icecast  struct {
		URL      string `yaml:"url"`
		Playlist string `yaml:"playlist_path"`
	} `yaml:"icecast"`
	FilelistPath         string `yaml:"filelist_path"`
	MostListenedSongPath string `yaml:"most_listened_song_file_path"`
	Liquidsoap           struct {
		ExecPath   string `yaml:"executable_path"`
		ScriptPath string `yaml:"script_path"`
	} `yaml:"liquidsoap"`
	ListLastNSongs int `yaml:"list_last_n_songs"`
}

// Load reads a YAML file that stores configuration of a service.
func Load(path string) (*Configuration, error) {
	configFile, err := os.Open(path)
	if err != nil {
		return nil, errors.Wrap(err, "failed to open configuration file")
	}
	defer configFile.Close()

	config := &Configuration{}

	if err := yaml.NewDecoder(configFile).Decode(config); err != nil {
		return nil, errors.Wrap(err, "failed to parse configuration file")
	}

	return config, nil
}

// SplitNetworkAddress splits ListenOn option into network type (e.g. tcp, unix,
// udp) and address:port or /path/to/service.socket to listen on.
func (c *Configuration) SplitNetworkAddress() (string, string) {
	s := strings.Split(c.ListenOn, " ")
	return s[0], s[1]
}