// Copyright © 2023 Ory Corp
// SPDX-License-Identifier: Apache-2.0

package validate_test

import (
	"io"
	"net/http"
	"net/url"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/ory/keto/internal/x/validate"
)

func toURL(t *testing.T, s string) *url.URL {
	u, err := url.Parse(s)
	require.NoError(t, err)
	return u
}

func TestValidateNoExtraParams(t *testing.T) {
	for _, tt := range []struct {
		name      string
		req       *http.Request
		assertErr assert.ErrorAssertionFunc
	}{
		{
			name:      "empty",
			req:       &http.Request{URL: toURL(t, "https://example.com")},
			assertErr: assert.NoError,
		},
		{
			name:      "all params",
			req:       &http.Request{URL: toURL(t, "https://example.com?foo=1&bar=baz")},
			assertErr: assert.NoError,
		},
		{
			name:      "extra params",
			req:       &http.Request{URL: toURL(t, "https://example.com?foo=1&bar=2&baz=3")},
			assertErr: assert.Error,
		},
	} {
		t.Run("case="+tt.name, func(t *testing.T) {
			err := validate.All(tt.req, validate.NoExtraQueryParams("foo", "bar"))
			tt.assertErr(t, err)
		})
	}
}

func TestQueryParamsContainsOneOf(t *testing.T) {
	for _, tt := range []struct {
		name      string
		req       *http.Request
		assertErr assert.ErrorAssertionFunc
	}{
		{
			name:      "empty",
			req:       &http.Request{URL: toURL(t, "https://example.com")},
			assertErr: assert.Error,
		},
		{
			name:      "other",
			req:       &http.Request{URL: toURL(t, "https://example.com?a=1&b=2&c=3")},
			assertErr: assert.Error,
		},
		{
			name:      "one",
			req:       &http.Request{URL: toURL(t, "https://example.com?foo=1")},
			assertErr: assert.NoError,
		},
		{
			name:      "all params",
			req:       &http.Request{URL: toURL(t, "https://example.com?foo=1&bar=baz")},
			assertErr: assert.NoError,
		},
		{
			name:      "extra params",
			req:       &http.Request{URL: toURL(t, "https://example.com?foo=1&bar=2&baz=3")},
			assertErr: assert.NoError,
		},
	} {
		t.Run("case="+tt.name, func(t *testing.T) {
			err := validate.All(tt.req, validate.QueryParamsContainsOneOf("foo", "bar"))
			tt.assertErr(t, err)
		})
	}
}

func TestValidateHasEmptyBody(t *testing.T) {
	for _, tt := range []struct {
		name      string
		req       *http.Request
		assertErr assert.ErrorAssertionFunc
	}{
		{
			name:      "empty body",
			req:       &http.Request{Body: io.NopCloser(strings.NewReader(""))},
			assertErr: assert.NoError,
		},
		{
			name:      "non-empty body",
			req:       &http.Request{Body: io.NopCloser(strings.NewReader("content"))},
			assertErr: assert.Error,
		},
	} {
		t.Run("case="+tt.name, func(t *testing.T) {
			err := validate.All(tt.req, validate.HasEmptyBody())
			tt.assertErr(t, err)
		})
	}

}