package service

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

	"errors"
	"testing"
	"time"

	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
)

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

		underTest := NewServiceAuthImpl(mockDbAuth, &types.ServerSettings{})

		actualUser, err := underTest.SignIn(user.Email, "password")
		assert.Nil(t, err)

		expectedUser := User{
			Id:            user.Id,
			Email:         user.Email,
			EmailVerified: user.EmailVerified,
		}

		assert.Equal(t, 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 := mocks.NewMockDbAuth(t)
		mockDbAuth.EXPECT().GetUser(user.Email).Return(user, nil)

		underTest := NewServiceAuthImpl(mockDbAuth, &types.ServerSettings{})

		_, err := underTest.SignIn("test@test.de", "wrong password")

		assert.Equal(t, ErrInvaidCredentials, err)
	})
	t.Run("should return ErrInvalidCretentials if user has not been found", func(t *testing.T) {
		t.Parallel()

		mockDbAuth := mocks.NewMockDbAuth(t)
		mockDbAuth.EXPECT().GetUser("test").Return(nil, db.ErrUserNotFound)

		underTest := NewServiceAuthImpl(mockDbAuth, &types.ServerSettings{})

		_, err := underTest.SignIn("test", "test")
		assert.Equal(t, ErrInvaidCredentials, err)
	})
	t.Run("should forward ErrInternal on any other error", func(t *testing.T) {
		t.Parallel()

		mockDbAuth := mocks.NewMockDbAuth(t)
		mockDbAuth.EXPECT().GetUser("test").Return(nil, errors.New("Some undefined error"))

		underTest := NewServiceAuthImpl(mockDbAuth, &types.ServerSettings{})

		_, err := underTest.SignIn("test", "test")

		assert.Equal(t, types.ErrInternal, err)
	})
}