// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.

package rewrite // import "miniflux.app/reader/rewrite"

import "testing"

func TestReplaceTextLinks(t *testing.T) {
	scenarios := map[string]string{
		`This is a link to example.org`:                                              `This is a link to example.org`,
		`This is a link to ftp://example.org`:                                        `This is a link to ftp://example.org`,
		`This is a link to www.example.org`:                                          `This is a link to www.example.org`,
		`This is a link to http://example.org`:                                       `This is a link to <a href="http://example.org">http://example.org</a>`,
		`This is a link to http://example.org, end of sentence.`:                     `This is a link to <a href="http://example.org">http://example.org</a>, end of sentence.`,
		`This is a link to https://example.org`:                                      `This is a link to <a href="https://example.org">https://example.org</a>`,
		`This is a link to https://www.example.org/path/to?q=s`:                      `This is a link to <a href="https://www.example.org/path/to?q=s">https://www.example.org/path/to?q=s</a>`,
		`This is a link to https://example.org/index#hash-tag, http://example.org/.`: `This is a link to <a href="https://example.org/index#hash-tag">https://example.org/index#hash-tag</a>, <a href="http://example.org/">http://example.org/</a>.`,
	}

	for input, expected := range scenarios {
		actual := replaceTextLinks(input)
		if actual != expected {
			t.Errorf(`Unexpected link replacement, got "%s" instead of "%s"`, actual, expected)
		}
	}
}

func TestRewriteWithNoMatchingRule(t *testing.T) {
	output := Rewriter("https://example.org/article", `Some text.`, ``)
	expected := `Some text.`

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithYoutubeLink(t *testing.T) {
	output := Rewriter("https://www.youtube.com/watch?v=1234", "Video Description\nhttp://example.org/path", ``)
	expected := `<iframe width="650" height="350" frameborder="0" src="https://www.youtube-nocookie.com/embed/1234" allowfullscreen></iframe><p>Video Description<br><a href="http://example.org/path">http://example.org/path</a></p>`

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithInexistingCustomRule(t *testing.T) {
	output := Rewriter("https://www.youtube.com/watch?v=1234", `Video Description`, `some rule`)
	expected := `Video Description`
	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithXkcdLink(t *testing.T) {
	description := `<img src="https://imgs.xkcd.com/comics/thermostat.png" title="Your problem is so terrible, I worry that, if I help you, I risk drawing the attention of whatever god of technology inflicted it on you." alt="Your problem is so terrible, I worry that, if I help you, I risk drawing the attention of whatever god of technology inflicted it on you." />`
	output := Rewriter("https://xkcd.com/1912/", description, ``)
	expected := `<figure><img src="https://imgs.xkcd.com/comics/thermostat.png" alt="Your problem is so terrible, I worry that, if I help you, I risk drawing the attention of whatever god of technology inflicted it on you."/><figcaption><p>Your problem is so terrible, I worry that, if I help you, I risk drawing the attention of whatever god of technology inflicted it on you.</p></figcaption></figure>`
	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithXkcdLinkHtmlInjection(t *testing.T) {
	description := `<img src="https://imgs.xkcd.com/comics/thermostat.png" title="<foo>" alt="<foo>" />`
	output := Rewriter("https://xkcd.com/1912/", description, ``)
	expected := `<figure><img src="https://imgs.xkcd.com/comics/thermostat.png" alt="&lt;foo&gt;"/><figcaption><p>&lt;foo&gt;</p></figcaption></figure>`
	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithXkcdLinkAndImageNoTitle(t *testing.T) {
	description := `<img src="https://imgs.xkcd.com/comics/thermostat.png" alt="Your problem is so terrible, I worry that, if I help you, I risk drawing the attention of whatever god of technology inflicted it on you." />`
	output := Rewriter("https://xkcd.com/1912/", description, ``)
	expected := description
	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithXkcdLinkAndNoImage(t *testing.T) {
	description := "test"
	output := Rewriter("https://xkcd.com/1912/", description, ``)
	expected := description
	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithXkcdAndNoImage(t *testing.T) {
	description := "test"
	output := Rewriter("https://xkcd.com/1912/", description, ``)
	expected := description

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteMailtoLink(t *testing.T) {
	description := `<a href="mailto:ryan@qwantz.com?subject=blah%20blah">contact</a>`
	output := Rewriter("https://www.qwantz.com/", description, ``)
	expected := `<a href="mailto:ryan@qwantz.com?subject=blah%20blah">contact [blah blah]</a>`
	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithPDFLink(t *testing.T) {
	description := "test"
	output := Rewriter("https://example.org/document.pdf", description, ``)
	expected := `<a href="https://example.org/document.pdf">PDF</a><br>test`

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithNoLazyImage(t *testing.T) {
	description := `<img src="https://example.org/image.jpg" alt="Image"><noscript><p>Some text</p></noscript>`
	output := Rewriter("https://example.org/article", description, "add_dynamic_image")
	expected := description

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithLazyImage(t *testing.T) {
	description := `<img src="" data-url="https://example.org/image.jpg" alt="Image"><noscript><img src="https://example.org/fallback.jpg" alt="Fallback"></noscript>`
	output := Rewriter("https://example.org/article", description, "add_dynamic_image")
	expected := `<img src="https://example.org/image.jpg" data-url="https://example.org/image.jpg" alt="Image"/><noscript><img src="https://example.org/fallback.jpg" alt="Fallback"></noscript>`

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithLazyDivImage(t *testing.T) {
	description := `<div data-url="https://example.org/image.jpg" alt="Image"></div><noscript><img src="https://example.org/fallback.jpg" alt="Fallback"></noscript>`
	output := Rewriter("https://example.org/article", description, "add_dynamic_image")
	expected := `<img src="https://example.org/image.jpg" alt="Image"/><noscript><img src="https://example.org/fallback.jpg" alt="Fallback"></noscript>`

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestRewriteWithUnknownLazyNoScriptImage(t *testing.T) {
	description := `<img src="" data-non-candidate="https://example.org/image.jpg" alt="Image"><noscript><img src="https://example.org/fallback.jpg" alt="Fallback"></noscript>`
	output := Rewriter("https://example.org/article", description, "add_dynamic_image")
	expected := `<img src="" data-non-candidate="https://example.org/image.jpg" alt="Image"/><img src="https://example.org/fallback.jpg" alt="Fallback"/>`

	if expected != output {
		t.Errorf(`Not expected output: got "%s" instead of "%s"`, output, expected)
	}
}

func TestNewLineRewriteRule(t *testing.T) {
	description := "A\nB\nC"
	output := Rewriter("https://example.org/article", description, "nl2br")
	expected := `A<br>B<br>C`

	if expected != output {
		t.Errorf(`Not expected output: got %q instead of %q`, output, expected)
	}
}

func TestConvertTextLinkRewriteRule(t *testing.T) {
	description := "Test: http://example.org/a/b"
	output := Rewriter("https://example.org/article", description, "convert_text_link")
	expected := `Test: <a href="http://example.org/a/b">http://example.org/a/b</a>`

	if expected != output {
		t.Errorf(`Not expected output: got %q instead of %q`, output, expected)
	}
}