package httputil

// Tests for HTTP query pagination, sorting, and filtering extraction.

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gofiber/fiber/v3"
	"github.com/stretchr/testify/require"

	"knowfoolery/backend/shared/domain/types"
)

// TestPaginationFromQuery verifies defaulting and bounds from query parameters.
func TestPaginationFromQuery(t *testing.T) {
	app := fiber.New()
	app.Get("/", func(c fiber.Ctx) error {
		pagination := PaginationFromQuery(c)
		return c.JSON(pagination)
	})

	req := httptest.NewRequest(http.MethodGet, "/?page=0&page_size=500", nil)
	resp, err := app.Test(req)
	require.NoError(t, err)
	defer resp.Body.Close()

	var p types.Pagination
	require.NoError(t, json.NewDecoder(resp.Body).Decode(&p))
	require.Equal(t, 1, p.Page)
	require.Equal(t, types.MaxPageSize, p.PageSize)
}

// TestSortingFromQuery verifies allowed field enforcement and direction normalization.
func TestSortingFromQuery(t *testing.T) {
	app := fiber.New()
	app.Get("/", func(c fiber.Ctx) error {
		sorting := SortingFromQuery(c, "name", []string{"name", "created"})
		return c.JSON(sorting)
	})

	req := httptest.NewRequest(http.MethodGet, "/?sort=invalid&direction=down", nil)
	resp, err := app.Test(req)
	require.NoError(t, err)
	defer resp.Body.Close()

	var s SortingParams
	require.NoError(t, json.NewDecoder(resp.Body).Decode(&s))
	require.Equal(t, "name", s.Field)
	require.Equal(t, "asc", s.Direction)
}

// TestFiltersFromQueryAndCustom verifies base filters and custom filter extraction.
func TestFiltersFromQueryAndCustom(t *testing.T) {
	app := fiber.New()
	app.Get("/", func(c fiber.Ctx) error {
		filters := FiltersFromQuery(c)
		filters.WithCustomFilter(c, "theme")
		return c.JSON(filters)
	})

	req := httptest.NewRequest(http.MethodGet, "/?search=hi&status=active&theme=scifi", nil)
	resp, err := app.Test(req)
	require.NoError(t, err)
	defer resp.Body.Close()

	var f FilterParams
	require.NoError(t, json.NewDecoder(resp.Body).Decode(&f))
	require.Equal(t, "hi", f.Search)
	require.Equal(t, "active", f.Status)
	require.Equal(t, "scifi", f.Custom["theme"])
}