// Copyright 2019 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 media

import (
	"testing"

	qt "github.com/frankban/quicktest"
	"github.com/google/go-cmp/cmp"
)

var eq = qt.CmpEquals(cmp.Comparer(func(m1, m2 Type) bool {
	return m1.Type() == m2.Type()
}))

func TestDefaultTypes(t *testing.T) {
	c := qt.New(t)
	for _, test := range []struct {
		tp               Type
		expectedMainType string
		expectedSubType  string
		expectedSuffix   string
		expectedType     string
		expectedString   string
	}{
		{CalendarType, "text", "calendar", "ics", "text/calendar", "text/calendar"},
		{CSSType, "text", "css", "css", "text/css", "text/css"},
		{SCSSType, "text", "x-scss", "scss", "text/x-scss", "text/x-scss"},
		{CSVType, "text", "csv", "csv", "text/csv", "text/csv"},
		{HTMLType, "text", "html", "html", "text/html", "text/html"},
		{JavascriptType, "application", "javascript", "js", "application/javascript", "application/javascript"},
		{JSONType, "application", "json", "json", "application/json", "application/json"},
		{RSSType, "application", "rss", "xml", "application/rss+xml", "application/rss+xml"},
		{SVGType, "image", "svg", "svg", "image/svg+xml", "image/svg+xml"},
		{TextType, "text", "plain", "txt", "text/plain", "text/plain"},
		{XMLType, "application", "xml", "xml", "application/xml", "application/xml"},
		{TOMLType, "application", "toml", "toml", "application/toml", "application/toml"},
		{YAMLType, "application", "yaml", "yaml", "application/yaml", "application/yaml"},
	} {
		c.Assert(test.tp.MainType, qt.Equals, test.expectedMainType)
		c.Assert(test.tp.SubType, qt.Equals, test.expectedSubType)
		c.Assert(test.tp.Suffix(), qt.Equals, test.expectedSuffix)
		c.Assert(test.tp.Delimiter, qt.Equals, defaultDelimiter)

		c.Assert(test.tp.Type(), qt.Equals, test.expectedType)
		c.Assert(test.tp.String(), qt.Equals, test.expectedString)

	}

	c.Assert(len(DefaultTypes), qt.Equals, 17)

}

func TestGetByType(t *testing.T) {
	c := qt.New(t)

	types := Types{HTMLType, RSSType}

	mt, found := types.GetByType("text/HTML")
	c.Assert(found, qt.Equals, true)
	c.Assert(HTMLType, eq, mt)

	_, found = types.GetByType("text/nono")
	c.Assert(found, qt.Equals, false)

	mt, found = types.GetByType("application/rss+xml")
	c.Assert(found, qt.Equals, true)
	c.Assert(RSSType, eq, mt)

	mt, found = types.GetByType("application/rss")
	c.Assert(found, qt.Equals, true)
	c.Assert(RSSType, eq, mt)
}

func TestGetByMainSubType(t *testing.T) {
	c := qt.New(t)
	f, found := DefaultTypes.GetByMainSubType("text", "plain")
	c.Assert(found, qt.Equals, true)
	c.Assert(TextType, eq, f)
	_, found = DefaultTypes.GetByMainSubType("foo", "plain")
	c.Assert(found, qt.Equals, false)
}

func TestBySuffix(t *testing.T) {
	c := qt.New(t)
	formats := DefaultTypes.BySuffix("xml")
	c.Assert(len(formats), qt.Equals, 2)
	c.Assert(formats[0].SubType, qt.Equals, "rss")
	c.Assert(formats[1].SubType, qt.Equals, "xml")
}

func TestGetFirstBySuffix(t *testing.T) {
	c := qt.New(t)
	f, found := DefaultTypes.GetFirstBySuffix("xml")
	c.Assert(found, qt.Equals, true)
	c.Assert(f, eq, Type{MainType: "application", SubType: "rss", mimeSuffix: "xml", Delimiter: ".", Suffixes: []string{"xml"}, fileSuffix: "xml"})
}

func TestFromTypeString(t *testing.T) {
	c := qt.New(t)
	f, err := fromString("text/html")
	c.Assert(err, qt.IsNil)
	c.Assert(f.Type(), eq, HTMLType.Type())

	f, err = fromString("application/custom")
	c.Assert(err, qt.IsNil)
	c.Assert(f, eq, Type{MainType: "application", SubType: "custom", mimeSuffix: "", fileSuffix: ""})

	f, err = fromString("application/custom+sfx")
	c.Assert(err, qt.IsNil)
	c.Assert(f, eq, Type{MainType: "application", SubType: "custom", mimeSuffix: "sfx"})

	_, err = fromString("noslash")
	c.Assert(err, qt.Not(qt.IsNil))

	f, err = fromString("text/xml; charset=utf-8")
	c.Assert(err, qt.IsNil)
	c.Assert(f, eq, Type{MainType: "text", SubType: "xml", mimeSuffix: ""})
	c.Assert(f.Suffix(), qt.Equals, "")
}

// Add a test for the SVG case
// https://github.com/gohugoio/hugo/issues/4920
func TestFromExtensionMultipleSuffixes(t *testing.T) {
	c := qt.New(t)
	tp, found := DefaultTypes.GetBySuffix("svg")
	c.Assert(found, qt.Equals, true)
	c.Assert(tp.String(), qt.Equals, "image/svg+xml")
	c.Assert(tp.fileSuffix, qt.Equals, "svg")
	c.Assert(tp.FullSuffix(), qt.Equals, ".svg")
	tp, found = DefaultTypes.GetByType("image/svg+xml")
	c.Assert(found, qt.Equals, true)
	c.Assert(tp.String(), qt.Equals, "image/svg+xml")
	c.Assert(found, qt.Equals, true)
	c.Assert(tp.FullSuffix(), qt.Equals, ".svg")

}

func TestDecodeTypes(t *testing.T) {
	c := qt.New(t)

	var tests = []struct {
		name        string
		maps        []map[string]interface{}
		shouldError bool
		assert      func(t *testing.T, name string, tt Types)
	}{
		{
			"Redefine JSON",
			[]map[string]interface{}{
				{
					"application/json": map[string]interface{}{
						"suffixes": []string{"jasn"}}}},
			false,
			func(t *testing.T, name string, tt Types) {
				c.Assert(len(tt), qt.Equals, len(DefaultTypes))
				json, found := tt.GetBySuffix("jasn")
				c.Assert(found, qt.Equals, true)
				c.Assert(json.String(), qt.Equals, "application/json")
				c.Assert(json.FullSuffix(), qt.Equals, ".jasn")
			}},
		{
			"MIME suffix in key, multiple file suffixes, custom delimiter",
			[]map[string]interface{}{
				{
					"application/hugo+hg": map[string]interface{}{
						"suffixes":  []string{"hg1", "hg2"},
						"Delimiter": "_",
					}}},
			false,
			func(t *testing.T, name string, tt Types) {
				c.Assert(len(tt), qt.Equals, len(DefaultTypes)+1)
				hg, found := tt.GetBySuffix("hg2")
				c.Assert(found, qt.Equals, true)
				c.Assert(hg.mimeSuffix, qt.Equals, "hg")
				c.Assert(hg.Suffix(), qt.Equals, "hg2")
				c.Assert(hg.FullSuffix(), qt.Equals, "_hg2")
				c.Assert(hg.String(), qt.Equals, "application/hugo+hg")

				hg, found = tt.GetByType("application/hugo+hg")
				c.Assert(found, qt.Equals, true)

			}},
		{
			"Add custom media type",
			[]map[string]interface{}{
				{
					"text/hugo+hgo": map[string]interface{}{
						"Suffixes": []string{"hgo2"}}}},
			false,
			func(t *testing.T, name string, tt Types) {
				c.Assert(len(tt), qt.Equals, len(DefaultTypes)+1)
				// Make sure we have not broken the default config.

				_, found := tt.GetBySuffix("json")
				c.Assert(found, qt.Equals, true)

				hugo, found := tt.GetBySuffix("hgo2")
				c.Assert(found, qt.Equals, true)
				c.Assert(hugo.String(), qt.Equals, "text/hugo+hgo")
			}},
	}

	for _, test := range tests {
		result, err := DecodeTypes(test.maps...)
		if test.shouldError {
			c.Assert(err, qt.Not(qt.IsNil))
		} else {
			c.Assert(err, qt.IsNil)
			test.assert(t, test.name, result)
		}
	}
}