// Copyright 2017 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package hugolib

import (
	"path/filepath"
	"strings"
	"testing"

	"fmt"

	"github.com/spf13/hugo/output"
)

func TestPageTargetPath(t *testing.T) {

	pathSpec := newTestDefaultPathSpec()

	for _, langPrefix := range []string{"", "no"} {
		t.Run(fmt.Sprintf("langPrefix=%q", langPrefix), func(t *testing.T) {
			for _, uglyURLs := range []bool{false, true} {
				t.Run(fmt.Sprintf("uglyURLs=%t", uglyURLs), func(t *testing.T) {

					tests := []struct {
						name     string
						d        targetPathDescriptor
						expected string
					}{
						{"JSON home", targetPathDescriptor{Kind: KindHome, Type: output.JSONFormat}, "/index.json"},
						{"AMP home", targetPathDescriptor{Kind: KindHome, Type: output.AMPFormat}, "/amp/index.html"},
						{"HTML home", targetPathDescriptor{Kind: KindHome, BaseName: "_index", Type: output.HTMLFormat}, "/index.html"},
						{"HTML section list", targetPathDescriptor{
							Kind:     KindSection,
							Sections: []string{"sect1"},
							BaseName: "_index",
							Type:     output.HTMLFormat}, "/sect1/index.html"},
						{"HTML taxonomy list", targetPathDescriptor{
							Kind:     KindTaxonomy,
							Sections: []string{"tags", "hugo"},
							BaseName: "_index",
							Type:     output.HTMLFormat}, "/tags/hugo/index.html"},
						{"HTML taxonomy term", targetPathDescriptor{
							Kind:     KindTaxonomy,
							Sections: []string{"tags"},
							BaseName: "_index",
							Type:     output.HTMLFormat}, "/tags/index.html"},
						{
							"HTML page", targetPathDescriptor{
								Kind:     KindPage,
								Dir:      "/a/b",
								BaseName: "mypage",
								Sections: []string{"a"},
								Type:     output.HTMLFormat}, "/a/b/mypage/index.html"},
						{
							"HTML page with special chars", targetPathDescriptor{
								Kind:     KindPage,
								Dir:      "/a/b",
								BaseName: "My Page!",
								Type:     output.HTMLFormat}, "/a/b/My-Page/index.html"},
						{"RSS home", targetPathDescriptor{Kind: kindRSS, Type: output.RSSFormat}, "/index.xml"},
						{"RSS section list", targetPathDescriptor{
							Kind:     kindRSS,
							Sections: []string{"sect1"},
							Type:     output.RSSFormat}, "/sect1/index.xml"},
						{
							"AMP page", targetPathDescriptor{
								Kind:     KindPage,
								Dir:      "/a/b/c",
								BaseName: "myamp",
								Type:     output.AMPFormat}, "/amp/a/b/c/myamp/index.html"},
						{
							"AMP page with URL with suffix", targetPathDescriptor{
								Kind:     KindPage,
								Dir:      "/sect/",
								BaseName: "mypage",
								URL:      "/some/other/url.xhtml",
								Type:     output.HTMLFormat}, "/some/other/url.xhtml"},
						{
							"JSON page with URL without suffix", targetPathDescriptor{
								Kind:     KindPage,
								Dir:      "/sect/",
								BaseName: "mypage",
								URL:      "/some/other/path/",
								Type:     output.JSONFormat}, "/some/other/path/index.json"},
						{
							"JSON page with URL without suffix and no trailing slash", targetPathDescriptor{
								Kind:     KindPage,
								Dir:      "/sect/",
								BaseName: "mypage",
								URL:      "/some/other/path",
								Type:     output.JSONFormat}, "/some/other/path/index.json"},
						{
							"HTML page with expanded permalink", targetPathDescriptor{
								Kind:              KindPage,
								Dir:               "/a/b",
								BaseName:          "mypage",
								ExpandedPermalink: "/2017/10/my-title",
								Type:              output.HTMLFormat}, "/2017/10/my-title/index.html"},
						{
							"Paginated HTML home", targetPathDescriptor{
								Kind:     KindHome,
								BaseName: "_index",
								Type:     output.HTMLFormat,
								Addends:  "page/3"}, "/page/3/index.html"},
						{
							"Paginated Taxonomy list", targetPathDescriptor{
								Kind:     KindTaxonomy,
								BaseName: "_index",
								Sections: []string{"tags", "hugo"},
								Type:     output.HTMLFormat,
								Addends:  "page/3"}, "/tags/hugo/page/3/index.html"},
						{
							"Regular page with addend", targetPathDescriptor{
								Kind:     KindPage,
								Dir:      "/a/b",
								BaseName: "mypage",
								Addends:  "c/d/e",
								Type:     output.HTMLFormat}, "/a/b/mypage/c/d/e/index.html"},
					}

					for i, test := range tests {
						test.d.PathSpec = pathSpec
						test.d.UglyURLs = uglyURLs
						test.d.LangPrefix = langPrefix
						test.d.Dir = filepath.FromSlash(test.d.Dir)
						isUgly := uglyURLs && !test.d.Type.NoUgly

						expected := test.expected

						// TODO(bep) simplify
						if test.d.Kind == KindHome && test.d.Type.Path != "" {
						} else if (!strings.HasPrefix(expected, "/index") || test.d.Addends != "") && test.d.URL == "" && isUgly {
							expected = strings.Replace(expected,
								"/"+test.d.Type.BaseName+"."+test.d.Type.MediaType.Suffix,
								"."+test.d.Type.MediaType.Suffix, -1)
						}

						if test.d.LangPrefix != "" && !(test.d.Kind == KindPage && test.d.URL != "") {
							expected = "/" + test.d.LangPrefix + expected
						}

						expected = filepath.FromSlash(expected)

						pagePath := createTargetPath(test.d)

						if pagePath != expected {
							t.Fatalf("[%d] [%s] targetPath expected %q, got: %q", i, test.name, expected, pagePath)
						}
					}
				})
			}
		})
	}

}
