package basicauth

import (
	"time"

	"github.com/imdario/mergo"
	"gopkg.in/kataras/iris.v6"
)

const (
	// DefaultBasicAuthRealm is "Authorization Required"
	DefaultBasicAuthRealm = "Authorization Required"
	// DefaultBasicAuthContextKey is the "auth"
	// this key is used to do context.Set("user", theUsernameFromBasicAuth)
	DefaultBasicAuthContextKey = "user"
)

// DefaultExpireTime zero time
var DefaultExpireTime time.Time // 0001-01-01 00:00:00 +0000 UTC

// Config the configs for the basicauth middleware
type Config struct {
	// Users a map of login and the value (username/password)
	Users map[string]string
	// Realm http://tools.ietf.org/html/rfc2617#section-1.2. Default is "Authorization Required"
	Realm string
	// ContextKey the key for ctx.GetString(...). Default is 'user'
	ContextKey string
	// Expires expiration duration, default is 0 never expires
	Expires time.Duration
}

// DefaultConfig returns the default configs for the BasicAuth middleware
func DefaultConfig() Config {
	return Config{make(map[string]string), DefaultBasicAuthRealm, DefaultBasicAuthContextKey, 0}
}

// MergeSingle merges the default with the given config and returns the result
func (c Config) MergeSingle(cfg Config) (config Config) {
	config = cfg
	mergo.Merge(&config, c)
	return
}

// User returns the user from context key same as 'ctx.GetString("user")' but cannot be used by the developer, this is only here in order to understand how you can get the authenticated username
func (c Config) User(ctx *iris.Context) string {
	return ctx.GetString(c.ContextKey)
}