package service

import (
	"me-fit/db"
	m "me-fit/mocks"
	"me-fit/types"

	"errors"
	"testing"
	"time"

	"github.com/google/uuid"
)

func TestSignIn(t *testing.T) {
	t.Parallel()
	t.Run("should return user if password is correct", func(t *testing.T) {
		t.Parallel()
		salt := []byte("salt")
		verifiedAt := time.Date(2020, 1, 2, 0, 0, 0, 0, time.UTC)

		user := db.NewUser(
			uuid.New(),
			"test@test.de",
			true,
			&verifiedAt,
			false,
			GetHashPassword("password", salt),
			salt,
			time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC),
		)

		mockDbAuth := m.NewMockDbAuth(t)
		mockDbAuth.EXPECT().GetUser("test@test.de").Return(user, nil)

		underTest := NewServiceAuthImpl(mockDbAuth)

		actualUser, err := underTest.SignIn(user.Email, "password")
		if err != nil {
			t.Errorf("Expected nil, got %v", err)
		}

		expectedUser := User{
			Id:            user.Id,
			Email:         user.Email,
			EmailVerified: user.EmailVerified,
		}
		if *actualUser != expectedUser {
			t.Errorf("Expected %v, got %v", expectedUser, actualUser)
		}
	})

	t.Run("should return ErrInvalidCretentials if password is not correct", func(t *testing.T) {
		t.Parallel()
		salt := []byte("salt")
		verifiedAt := time.Date(2020, 1, 2, 0, 0, 0, 0, time.UTC)
		user := db.NewUser(
			uuid.New(),
			"test@test.de",
			true,
			&verifiedAt,
			false,
			GetHashPassword("password", salt),
			salt,
			time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC),
		)

		mockDbAuth := m.NewMockDbAuth(t)
		mockDbAuth.EXPECT().GetUser(user.Email).Return(user, nil)

		underTest := NewServiceAuthImpl(mockDbAuth)

		_, err := underTest.SignIn("test@test.de", "wrong password")
		if err != ErrInvaidCredentials {
			t.Errorf("Expected %v, got %v", ErrInvaidCredentials, err)
		}
	})
	t.Run("should return ErrInvalidCretentials if user has not been found", func(t *testing.T) {
		t.Parallel()
		mockDbAuth := m.NewMockDbAuth(t)
		mockDbAuth.EXPECT().GetUser("test").Return(nil, db.ErrUserNotFound)

		underTest := NewServiceAuthImpl(mockDbAuth)

		_, err := underTest.SignIn("test", "test")
		if err != ErrInvaidCredentials {
			t.Errorf("Expected %v, got %v", ErrInvaidCredentials, err)
		}
	})
	t.Run("should forward ErrInternal on any other error", func(t *testing.T) {
		t.Parallel()
		mockDbAuth := m.NewMockDbAuth(t)
		mockDbAuth.EXPECT().GetUser("test").Return(nil, errors.New("Some error"))

		underTest := NewServiceAuthImpl(mockDbAuth)

		_, err := underTest.SignIn("test", "test")
		if err != types.ErrInternal {
			t.Errorf("Expected %v, got %v", types.ErrInternal, err)
		}
	})
}