package group

import (
	"encoding/json"
	"log"
	"reflect"
	"testing"
)

var pw1 = Password{
	Type: "plain",
}
var pw2 = Password{
	Type: "plain",
	Key: "pass",
}
var pw3 = Password{
	Type:       "pbkdf2",
	Hash:       "sha-256",
	Key:        "fe499504e8f144693fae828e8e371d50e019d0e4c84994fa03f7f445bd8a570a",
	Salt:       "bcc1717851030776",
	Iterations: 4096,
}
var pw4 = Password{
	Type: "bcrypt",
	Key: "$2a$10$afOr2f33onT/nDFFyT3mbOq5FMSw1wWXfyTXQTBMbKvZpBkoD3Qwu",
}
var pw5 = Password{}
var pw6 = Password{
	Type: "bad",
}

func TestGood(t *testing.T) {
	if match, err := pw1.Match(""); err != nil || !match {
		t.Errorf("pw2 doesn't match (%v)", err)
	}
	if match, err := pw2.Match("pass"); err != nil || !match {
		t.Errorf("pw2 doesn't match (%v)", err)
	}
	if match, err := pw3.Match("pass"); err != nil || !match {
		t.Errorf("pw3 doesn't match (%v)", err)
	}
	if match, err := pw4.Match("pass"); err != nil || !match {
		t.Errorf("pw4 doesn't match (%v)", err)
	}
}

func TestBad(t *testing.T) {
	if match, err := pw2.Match("bad"); err != nil || match {
		t.Errorf("pw2 matches")
	}
	if match, err := pw3.Match("bad"); err != nil || match {
		t.Errorf("pw3 matches")
	}
	if match, err := pw4.Match("bad"); err != nil || match {
		t.Errorf("pw4 matches")
	}
	if match, err := pw5.Match(""); err == nil || match {
		t.Errorf("pw5 matches")
	}
	if match, err := pw5.Match("bad"); err == nil || match {
		t.Errorf("pw5 matches")
	}
	if match, err := pw6.Match("bad"); err == nil || match {
		t.Errorf("pw6 matches")
	}
}

func TestJSON(t *testing.T) {
	plain, err := json.Marshal(pw2)
	if err != nil || string(plain) != `"pass"` {
		t.Errorf("Expected \"pass\", got %v", string(plain))
	}

	for _, pw := range []Password{pw1, pw2, pw3, pw4, pw5} {
		j, err := json.Marshal(pw)
		if err != nil {
			t.Fatalf("Marshal: %v", err)
		}
		if testing.Verbose() {
			log.Printf("%v", string(j))
		}
		var pw2 Password
		err = json.Unmarshal(j, &pw2)
		if err != nil {
			t.Errorf("Unmarshal: %v", err)
		} else if !reflect.DeepEqual(pw, pw2) {
			t.Errorf("Expected %v, got %v", pw, pw2)
		}
	}
}

func BenchmarkPlain(b *testing.B) {
	for i := 0; i < b.N; i++ {
		match, err := pw2.Match("bad")
		if err != nil || match {
			b.Errorf("pw2 matched")
		}
	}
}

func BenchmarkPBKDF2(b *testing.B) {
	for i := 0; i < b.N; i++ {
		match, err := pw3.Match("bad")
		if err != nil || match {
			b.Errorf("pw3 matched")
		}
	}
}

func BenchmarkBCrypt(b *testing.B) {
	for i := 0; i < b.N; i++ {
		match, err := pw4.Match("bad")
		if err != nil || match {
			b.Errorf("pw3 matched")
		}
	}
}