package main

import (
	"encoding/json"
	"flag"
	"os"
	"path"

	"gopkg.in/yaml.v3"
)

type Config struct {
	TLS         bool   `json:"tls" yaml:"tls"`
	Key         string `json:"key" yaml:"key"`
	Cert        string `json:"cert" yaml:"cert"`
	Port        uint16 `json:"port" yaml:"port"`
	HTTP        bool   `json:"http" yaml:"http"`
	Plugins     string `json:"plugins" yaml:"plugins"`
	ClusterPort uint16 `json:"clusterPort" yaml:"clusterPort"`
	ServerID    string `json:"serverId" yaml:"serverId"`
	JoinAddr    string `json:"joinAddr" yaml:"joinAddr"`
	Addr        string
}

func GetConfig() Config {
	tls := flag.Bool("tls", false, "Start the server in TLS mode. Default is false")
	key := flag.String("key", "", "The private key file path.")
	cert := flag.String("cert", "", "The signed certificate file path.")
	port := flag.Int("port", 7480, "Port to use. Default is 7480")
	http := flag.Bool("http", false, "Use HTTP protocol instead of raw TCP. Default is false")
	plugins := flag.String("plugins", ".", "The path to the plugins folder.")
	clusterPort := flag.Int("clusterPort", 7481, "Port to use for intra-cluster communication. Leave on the client.")
	serverId := flag.String("serverId", "1", "Server ID in raft cluster. Leave empty for client.")
	joinAddr := flag.String("joinAddr", "", "Address of cluster member in a cluster to you want to join.")
	config := flag.String(
		"config",
		"",
		`File path to a JSON or YAML config file.The values in this config file will override the flag values.`,
	)

	flag.Parse()

	var conf Config

	if len(*config) > 0 {
		// Load config from config file
		if f, err := os.Open(*config); err != nil {
			panic(err)
		} else {
			defer f.Close()

			ext := path.Ext(f.Name())

			if ext == ".json" {
				json.NewDecoder(f).Decode(&conf)
			}

			if ext == ".yaml" || ext == ".yml" {
				yaml.NewDecoder(f).Decode(&conf)
			}
		}

	} else {
		conf = Config{
			TLS:         *tls,
			Key:         *key,
			Cert:        *cert,
			HTTP:        *http,
			Port:        uint16(*port),
			ClusterPort: uint16(*clusterPort),
			ServerID:    *serverId,
			Plugins:     *plugins,
			JoinAddr:    *joinAddr,
		}
	}

	return conf
}