package config

import (
	"time"

	"github.com/fsnotify/fsnotify"
	"github.com/khlieng/dispatch/storage"
	"github.com/spf13/viper"
)

type Config struct {
	Address            string
	Port               string
	Dev                bool
	Identd             bool
	HexIP              bool
	AutoCTCP           bool `mapstructure:"auto_ctcp"`
	VerifyCertificates bool `mapstructure:"verify_certificates"`
	Headers            map[string]string
	Defaults           Defaults
	HTTPS              HTTPS
	LetsEncrypt        LetsEncrypt
	Auth               Auth
	DCC                DCC
	Proxy              Proxy
}

type Defaults struct {
	Name           string
	Host           string
	Port           string
	Channels       []string
	ServerPassword string `mapstructure:"server_password"`
	SSL            bool
	ReadOnly       bool
	ShowDetails    bool `mapstructure:"show_details"`
}

type HTTPS struct {
	Enabled bool
	Port    string
	Cert    string
	Key     string
	HSTS    HSTS
}

type HSTS struct {
	Enabled           bool
	MaxAge            string `mapstructure:"max_age"`
	IncludeSubdomains bool   `mapstructure:"include_subdomains"`
	Preload           bool
}

type LetsEncrypt struct {
	Domain string
	Email  string
}

type Auth struct {
	Anonymous    bool
	Login        bool
	Registration bool
	Providers    map[string]Provider
}

type Provider struct {
	Key    string
	Secret string
}

type DCC struct {
	Enabled bool
	Autoget Autoget
}

type Autoget struct {
	Enabled     bool
	Delete      bool
	DeleteAfter time.Duration `mapstructure:"delete_after"`
}

type Proxy struct {
	Enabled  bool
	Protocol string
	Host     string
	Port     string
	Username string
	Password string
}

func LoadConfig() (*Config, chan *Config) {
	viper.SetConfigName("config")
	viper.AddConfigPath(storage.Path.ConfigRoot())
	viper.ReadInConfig()

	config := &Config{}
	viper.Unmarshal(config)

	viper.WatchConfig()

	configCh := make(chan *Config, 1)

	prev := time.Now()
	viper.OnConfigChange(func(e fsnotify.Event) {
		now := time.Now()
		// fsnotify sometimes fires twice
		if now.Sub(prev) > time.Second {
			config := &Config{}
			err := viper.Unmarshal(config)
			if err == nil {
				configCh <- config
			}

			prev = now
		}
	})

	return config, configCh
}