package config

import (
	"errors"
	"gopkg.in/yaml.v2"
	"os"
)

func ParseFile(file string) (cfg *Config, err error) {
	if file == "" {
		return nil, errors.New("missing config file")
	}
	f, err := os.Open(file)
	if err != nil {
		return
	}
	cfg = new(Config)
	err = yaml.NewDecoder(f).Decode(cfg)
	return
}

type Config struct {
	DBFile string `yaml:"dbFile"`

	Leader bool `yaml:"leader"`

	AddressRange []string `yaml:"addressRange"`

	// LocalPeer is the configuration of this host
	LocalPeer RaftPeer `yaml:"localPeer"`

	// Peers are all of the peers within the RAFT cluster
	RemotePeers []RaftPeer `yaml:"remotePeers"`

	// Interface is the network interface to bind to (default: First Adapter)
	Interface string `yaml:"interface,omitempty"`
}

// RaftPeer details the configuration of all cluster peers
type RaftPeer struct {
	ID string `yaml:"id"`

	// IP Address of a peer instance
	Address string `yaml:"address"`

	// Listening port of this peer instance
	Port int `yaml:"port"`
}