package service_test

import (
	"context"
	"log/slog"
	"testing"

	"gitea.michaelthomson.dev/mthomson/habits/internal/auth"
	"gitea.michaelthomson.dev/mthomson/habits/internal/test"
	"gitea.michaelthomson.dev/mthomson/habits/internal/user/repository"
	"gitea.michaelthomson.dev/mthomson/habits/internal/user/service"
	"github.com/gofrs/uuid/v5"
)

func TestRegisterUser(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	logger := slog.Default()
	tdb := test.NewTestDatabase(t)
	defer tdb.TearDown()
	r := repository.NewUserRepository(logger, tdb.Db)
	argon2IdHash := auth.NewArgon2IdHash(1, 32, 64*1024, 32, 256)

	userService := service.NewUserService(logger, r, argon2IdHash)

	t.Run("Create user", func(t *testing.T) {
		_, err := userService.Register(ctx, "test@test.com", "supersecurepassword")

		AssertNoError(t, err)
	})
}

func TestGetUser(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	logger := slog.Default()
	tdb := test.NewTestDatabase(t)
	defer tdb.TearDown()
	r := repository.NewUserRepository(logger, tdb.Db)
	argon2IdHash := auth.NewArgon2IdHash(1, 32, 64*1024, 32, 256)

	userService := service.NewUserService(logger, r, argon2IdHash)

	uuid, err := userService.Register(ctx, "test@test.com", "supersecurepassword")
	AssertNoError(t, err)

	t.Run("Get exisiting user", func(t *testing.T) {
		_, err := userService.GetUser(ctx, uuid)

		AssertNoError(t, err)
	})

	t.Run("Get non-existant user", func(t *testing.T) {
		_, err := userService.GetUser(ctx, NewUUID(t))

		AssertErrors(t, err, service.ErrNotFound)
	})
}

func TestDeleteUser(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	logger := slog.Default()
	tdb := test.NewTestDatabase(t)
	defer tdb.TearDown()
	r := repository.NewUserRepository(logger, tdb.Db)
	argon2IdHash := auth.NewArgon2IdHash(1, 32, 64*1024, 32, 256)

	userService := service.NewUserService(logger, r, argon2IdHash)

	uuid, err := userService.Register(ctx, "test@test.com", "supersecurepassword")
	AssertNoError(t, err)

	t.Run("Delete exisiting user", func(t *testing.T) {
		err := userService.DeleteUser(ctx, uuid)

		AssertNoError(t, err)
	})

	t.Run("Delete non-existant user", func(t *testing.T) {
		err := userService.DeleteUser(ctx, uuid)

		AssertErrors(t, err, service.ErrNotFound)
	})
}

func TestUpdateUserEmail(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	logger := slog.Default()
	tdb := test.NewTestDatabase(t)
	defer tdb.TearDown()
	r := repository.NewUserRepository(logger, tdb.Db)
	argon2IdHash := auth.NewArgon2IdHash(1, 32, 64*1024, 32, 256)

	userService := service.NewUserService(logger, r, argon2IdHash)

	uuid, err := userService.Register(ctx, "test@test.com", "supersecurepassword")
	AssertNoError(t, err)

	t.Run("Update existing user email", func(t *testing.T) {
		err := userService.UpdateUserEmail(ctx, uuid, "newemail@test.com")

		AssertNoError(t, err)

		newUser, err := userService.GetUser(ctx, uuid)

		AssertNoError(t, err)

		if newUser.Email != "newemail@test.com" {
			t.Errorf("Emails do not match wanted %q, got %q", "newemail@test.com", newUser.Email)
		}
	})

	t.Run("Update non-existant user", func(t *testing.T) {
		err := userService.UpdateUserEmail(ctx, NewUUID(t), "newemail@test.com")

		AssertErrors(t, err, service.ErrNotFound)
	})
}

func AssertErrors(t testing.TB, got, want error) {
	t.Helper()
	if got != want {
		t.Errorf("got error: %v, want error: %v", want, got)
	}
}

func AssertNoError(t testing.TB, err error) {
	t.Helper()
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
}

func AssertUsers(t testing.TB, got, want service.User) {
	if !got.Equal(want) {
		t.Errorf("got %+v want %+v", got, want)
	}
}

func NewUUID(t testing.TB) uuid.UUID {
	t.Helper()
	uuid, err := uuid.NewV4()
	if err != nil {
		t.Errorf("error generation uuid: %v", err)
	}
	return uuid
}