<?php

declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * Tests for BlueskyThreadsExtension.
 *
 * Private methods are exercised via ReflectionMethod so the public API of the
 * extension stays untouched while still allowing granular unit coverage.
 */
class BlueskyThreadsTest extends TestCase {

	private BlueskyThreadsExtension $ext;

	// -------------------------------------------------------------------------
	// Helpers
	// -------------------------------------------------------------------------

	protected function setUp(): void {
		Minz_Request::reset();
		$this->ext = new BlueskyThreadsExtension();
	}

	/** Call a private/protected method by name and return its result. */
	private function call(string $method, mixed ...$args): mixed {
		$ref = new ReflectionMethod(BlueskyThreadsExtension::class, $method);
		return $ref->invoke($this->ext, ...$args);
	}

	// -------------------------------------------------------------------------
	// Feed parsing — verifies the extension detects Bluesky posts in a real feed
	// -------------------------------------------------------------------------

	/**
	 * Every <link> in the hockeyviz RSS feed must match the Bluesky post URL
	 * pattern used by the extension, confirming the feed is fully covered.
	 *
	 * Feed source: https://bsky.app/profile/did:plc:d4324t32vfi5xzydqbh2qdj3/rss
	 */
	public function testAllFeedLinksMatchBskyPattern(): void {
		$feed    = simplexml_load_file(__DIR__ . '/fixtures/hockeyviz_feed.xml');
		$pattern = '~bsky\.app/profile/([^/]+)/post/([^/?#\s]+)~';

		$this->assertNotFalse($feed, 'RSS fixture must be parseable XML');
		$this->assertGreaterThan(0, count($feed->channel->item), 'Feed must have at least one item');

		foreach ($feed->channel->item as $item) {
			$this->assertMatchesRegularExpression(
				$pattern,
				(string) $item->link,
				"Link '{$item->link}' should match the Bluesky post URL pattern"
			);
		}
	}

	/**
	 * The specific thread post (2 replies) is present in the feed and its URL
	 * is correctly identified as a Bluesky post by the extension's pattern.
	 */
	public function testThreadPostIsPresentInFeed(): void {
		$feed           = simplexml_load_file(__DIR__ . '/fixtures/hockeyviz_feed.xml');
		$threadPostLink = 'https://bsky.app/profile/hockeyviz.com/post/3mhtk7awhrp26';

		$found = false;
		foreach ($feed->channel->item as $item) {
			if ((string) $item->link === $threadPostLink) {
				$found = true;
				break;
			}
		}

		$this->assertTrue($found, "Thread post {$threadPostLink} must be present in the feed fixture");
	}

	/**
	 * fetchThread() leaves entries whose link is not a Bluesky URL completely
	 * untouched — no content mutation should occur.
	 */
	public function testFetchThreadIgnoresNonBskyEntries(): void {
		$entry = new FreshRSS_Entry();
		$entry->_link('https://example.com/some/article');
		$entry->_content('original content');

		$result = $this->ext->fetchThread($entry);

		$this->assertSame('original content', $result->content());
	}

	/**
	 * fetchThread() recognises a valid Bluesky post URL and attempts enrichment.
	 * We verify it does NOT leave the content untouched (even if the API fails
	 * in CI, the URL detection code-path must be exercised).
	 *
	 * Because this calls the live API (or silently skips on failure), we just
	 * assert the entry is returned without throwing.
	 */
	public function testFetchThreadHandlesBskyEntryWithoutThrowing(): void {
		$entry = new FreshRSS_Entry();
		$entry->_link('https://bsky.app/profile/hockeyviz.com/post/3mhtk7awhrp26');
		$entry->_content('');

		$result = $this->ext->fetchThread($entry);

		$this->assertInstanceOf(FreshRSS_Entry::class, $result);
	}

	// -------------------------------------------------------------------------
	// Thread rendering — given a fixture API response, HTML must be correct
	// -------------------------------------------------------------------------

	/**
	 * renderThread() on the 3mhtk7awhrp26 fixture (1 root + 2 replies) must
	 * produce exactly 3 bsky-post elements and 1 bsky-replies wrapper.
	 */
	public function testRenderThreadWithTwoReplies(): void {
		$data   = json_decode(file_get_contents(__DIR__ . '/fixtures/thread_3mhtk7awhrp26.json'), true);
		$thread = $data['thread'];

		$html = $this->call('renderThread', $thread, true);

		$this->assertSame(3, substr_count($html, 'bsky-post'),
			'Should render root post + 2 replies = 3 bsky-post elements');

		$this->assertSame(1, substr_count($html, 'bsky-replies'),
			'Should wrap replies in exactly one bsky-replies container');
	}

	/** Root post carries the bordered card style; replies use lighter padding. */
	public function testRootPostUsesCardStyle(): void {
		$data = json_decode(file_get_contents(__DIR__ . '/fixtures/thread_3mhtk7awhrp26.json'), true);
		$html = $this->call('renderThread', $data['thread'], true);

		$this->assertStringContainsString('border:1px solid #cfd9de;border-radius:12px', $html,
			'Root post must use the card border style');
	}

	/** The root post text must appear in the rendered HTML. */
	public function testRootPostTextIsRendered(): void {
		$data = json_decode(file_get_contents(__DIR__ . '/fixtures/thread_3mhtk7awhrp26.json'), true);
		$html = $this->call('renderThread', $data['thread'], true);

		$this->assertStringContainsString('Gold Drafting', $html);
		$this->assertStringContainsString('hockeyviz.com', $html);
	}

	/** Reply post authors are not rendered; only quoted post authors are. */
	public function testReplyAuthorsAreRendered(): void {
		$data = json_decode(file_get_contents(__DIR__ . '/fixtures/thread_3mhtk7awhrp26.json'), true);
		$html = $this->call('renderThread', $data['thread'], true);

		$this->assertStringNotContainsString('example.bsky.social', $html, 'Reply author must not appear in thread posts');
		$this->assertStringNotContainsString('hockeyfan.bsky.social', $html, 'Reply author must not appear in thread posts');
	}

	/** The quoted/embedded post inside the root is rendered via renderQuotedRecord. */
	public function testQuotedPostEmbedIsRendered(): void {
		$data = json_decode(file_get_contents(__DIR__ . '/fixtures/thread_3mhtk7awhrp26.json'), true);
		$html = $this->call('renderThread', $data['thread'], true);

		// The quoted record contains the #GoldRace text
		$this->assertStringContainsString('GoldRace', $html,
			'Quoted post text must be rendered as an embed');
	}

	/** Quoted posts include a "View on Bluesky" link; thread posts do not. */
	public function testViewOnBskyLinksArePresent(): void {
		$data = json_decode(file_get_contents(__DIR__ . '/fixtures/thread_3mhtk7awhrp26.json'), true);
		$html = $this->call('renderThread', $data['thread'], true);

		$this->assertStringNotContainsString('3mhtk7awhrp26', $html, 'Thread post rkey must not appear as a permalink');
		$this->assertStringContainsString('3mhtjo3rtkn26', $html, 'Quoted post rkey must appear in its View on Bluesky link');
		$this->assertStringContainsString('View on Bluesky', $html);
	}

	// -------------------------------------------------------------------------
	// applyFacets — rich-text rendering
	// -------------------------------------------------------------------------

	public function testApplyFacetsNoFacetsEscapesHtml(): void {
		$result = $this->call('applyFacets', '<Hello & World>', []);
		$this->assertSame('&lt;Hello &amp; World&gt;', $result);
	}

	public function testApplyFacetsRendersLink(): void {
		$text   = 'Visit example.com now';
		$facets = [[
			'index'    => ['byteStart' => 6, 'byteEnd' => 17],
			'features' => [['$type' => 'app.bsky.richtext.facet#link', 'uri' => 'https://example.com']],
		]];

		$html = $this->call('applyFacets', $text, $facets);

		$this->assertStringContainsString('<a href="https://example.com"', $html);
		$this->assertStringContainsString('example.com', $html);
	}

	public function testApplyFacetsRendersMention(): void {
		$text   = 'Hello @user.bsky.social today';
		$facets = [[
			'index'    => ['byteStart' => 6, 'byteEnd' => 23],
			'features' => [['$type' => 'app.bsky.richtext.facet#mention', 'did' => 'did:plc:fakeid']],
		]];

		$html = $this->call('applyFacets', $text, $facets);

		$this->assertStringContainsString('href="https://bsky.app/profile/did:plc:fakeid"', $html);
		$this->assertStringContainsString('@user.bsky.social', $html);
	}

	public function testApplyFacetsRendersHashtag(): void {
		$text   = 'Great game #GoldRace tonight';
		$facets = [[
			'index'    => ['byteStart' => 11, 'byteEnd' => 21],
			'features' => [['$type' => 'app.bsky.richtext.facet#tag', 'tag' => 'GoldRace']],
		]];

		$html = $this->call('applyFacets', $text, $facets);

		$this->assertStringContainsString('href="https://bsky.app/hashtag/GoldRace"', $html);
		$this->assertStringContainsString('#GoldRace', $html);
	}

	// -------------------------------------------------------------------------
	// needsRefetch — staleness rules
	// -------------------------------------------------------------------------

	public function testNeedsRefetchWhenNeverCached(): void {
		$this->assertTrue($this->call('needsRefetch', time() - 60, null),
			'Always refetch when there is no cache entry');
	}

	public function testNoRefetchWhenPostIsFrozen(): void {
		$publishedAt = time() - (8 * 86400); // 8 days ago
		$fetchedAt   = time() - 3600;         // fetched 1 hour ago

		$this->assertFalse($this->call('needsRefetch', $publishedAt, $fetchedAt),
			'Posts older than 7 days are frozen and must not be re-fetched');
	}

	public function testRefetchRecentPostWithStaleCache(): void {
		$publishedAt = time() - 1800; // 30 min old → window is 10 min
		$fetchedAt   = time() - 900;  // cached 15 min ago → stale

		$this->assertTrue($this->call('needsRefetch', $publishedAt, $fetchedAt),
			'Cache older than the refresh window must trigger a re-fetch');
	}

	public function testNoRefetchRecentPostWithFreshCache(): void {
		$publishedAt = time() - 1800; // 30 min old → window is 10 min
		$fetchedAt   = time() - 300;  // cached 5 min ago → fresh

		$this->assertFalse($this->call('needsRefetch', $publishedAt, $fetchedAt),
			'Cache newer than the refresh window must NOT trigger a re-fetch');
	}

	public function testRefetchWindows(): void {
		$cases = [
			// [post age seconds, cache age seconds, expect refetch]
			[1800,        601, true],   // < 1 h post, > 10 min cache → stale
			[1800,        599, false],  // < 1 h post, < 10 min cache → fresh
			[7200,       3601, true],   // < 24 h post, > 1 h cache  → stale
			[7200,       3599, false],  // < 24 h post, < 1 h cache  → fresh
			[3 * 86400, 43201, true],   // < 7 d post,  > 12 h cache → stale
			[3 * 86400, 43199, false],  // < 7 d post,  < 12 h cache → fresh
		];

		foreach ($cases as [$postAge, $cacheAge, $expectRefetch]) {
			$publishedAt = time() - $postAge;
			$fetchedAt   = time() - $cacheAge;
			$this->assertSame(
				$expectRefetch,
				$this->call('needsRefetch', $publishedAt, $fetchedAt),
				"postAge={$postAge}s cacheAge={$cacheAge}s"
			);
		}
	}

	// -------------------------------------------------------------------------
	// handleConfigureAction — user config
	// -------------------------------------------------------------------------

	public function testHandleConfigureActionSavesDepth(): void {
		Minz_Request::simulatePost(['depth' => '25']);
		$this->ext->handleConfigureAction();

		$this->assertSame(25, $this->ext->getUserConfigurationValue('depth'));
	}

	public function testHandleConfigureActionClampsMinDepth(): void {
		// 0 is falsy after (int) cast, so the code falls back to the default of 10.
		// A negative value exercises the max(1, ...) clamp.
		Minz_Request::simulatePost(['depth' => '-5']);
		$this->ext->handleConfigureAction();

		$this->assertSame(1, $this->ext->getUserConfigurationValue('depth'));
	}

	public function testHandleConfigureActionClampsMaxDepth(): void {
		Minz_Request::simulatePost(['depth' => '9999']);
		$this->ext->handleConfigureAction();

		$this->assertSame(1000, $this->ext->getUserConfigurationValue('depth'));
	}
}