package services

import (
	"testing"

	"github.com/stretchr/testify/assert"

	"custom-start-page/internal/models"
)

// TestSortPagesByOrder tests the sorting function without requiring DynamoDB
func TestSortPagesByOrder(t *testing.T) {
	pages := []*models.Page{
		{ID: "page-3", Order: 2},
		{ID: "page-1", Order: 0},
		{ID: "page-2", Order: 1},
	}

	sortPagesByOrder(pages)

	assert.Equal(t, "page-1", pages[0].ID)
	assert.Equal(t, "page-2", pages[1].ID)
	assert.Equal(t, "page-3", pages[2].ID)
}

// TestSortPagesByOrderAlreadySorted tests sorting already sorted pages
func TestSortPagesByOrderAlreadySorted(t *testing.T) {
	pages := []*models.Page{
		{ID: "page-1", Order: 0},
		{ID: "page-2", Order: 1},
		{ID: "page-3", Order: 2},
	}

	sortPagesByOrder(pages)

	assert.Equal(t, "page-1", pages[0].ID)
	assert.Equal(t, "page-2", pages[1].ID)
	assert.Equal(t, "page-3", pages[2].ID)
}

// TestSortPagesByOrderReversed tests sorting reversed pages
func TestSortPagesByOrderReversed(t *testing.T) {
	pages := []*models.Page{
		{ID: "page-3", Order: 2},
		{ID: "page-2", Order: 1},
		{ID: "page-1", Order: 0},
	}

	sortPagesByOrder(pages)

	assert.Equal(t, "page-1", pages[0].ID)
	assert.Equal(t, "page-2", pages[1].ID)
	assert.Equal(t, "page-3", pages[2].ID)
}

// TestSortPagesByOrderEmpty tests sorting empty slice
func TestSortPagesByOrderEmpty(t *testing.T) {
	pages := []*models.Page{}
	sortPagesByOrder(pages)
	assert.Empty(t, pages)
}

// TestSortPagesByOrderSingle tests sorting single page
func TestSortPagesByOrderSingle(t *testing.T) {
	pages := []*models.Page{
		{ID: "page-1", Order: 0},
	}

	sortPagesByOrder(pages)

	assert.Len(t, pages, 1)
	assert.Equal(t, "page-1", pages[0].ID)
}