package web

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestPaginateCollectionPreservesQueryParameters(t *testing.T) {
	request := httptest.NewRequest(http.MethodGet, "/g/3/plants?q=tomate&sort=name_asc&page=2", nil)
	request.AddCookie(&http.Cookie{Name: "gardomatic.entries-per-page", Value: "10"})
	values := make([]int, 25)
	for index := range values {
		values[index] = index + 1
	}

	page, pagination := paginateCollection(request, values)
	if len(page) != 10 || page[0] != 11 || page[9] != 20 {
		t.Fatalf("page = %v, want values 11 through 20", page)
	}
	if pagination == nil || pagination.Page != 2 || pagination.TotalPages != 3 {
		t.Fatalf("pagination = %+v, want page 2 of 3", pagination)
	}
	for _, pageURL := range []string{pagination.PreviousURL, pagination.NextURL} {
		if !strings.Contains(pageURL, "q=tomate") || !strings.Contains(pageURL, "sort=name_asc") {
			t.Fatalf("pagination URL does not preserve filters: %q", pageURL)
		}
	}
}

func TestPaginateCollectionOmitsNavigationForOnePage(t *testing.T) {
	request := httptest.NewRequest(http.MethodGet, "/gardens", nil)
	page, pagination := paginateCollection(request, []int{1, 2})
	if len(page) != 2 || pagination != nil {
		t.Fatalf("page = %v, pagination = %+v; want unmodified page without navigation", page, pagination)
	}
}