<?php

use PHPUnit\Framework\TestCase;

/**
 * TfeControllerOgTest — Pure logic tests for TfeController::buildOgTags()
 * and buildMetaDescription().
 *
 * These methods are protected; we use a thin subclass to expose them.
 */
class TfeControllerOgTest extends TestCase
{
    /**
     * Subclass that exposes protected methods for testing.
     */
    private static function makeController(): object
    {
        return new class () extends TfeController {
            public function __construct()
            {
                // Skip parent constructor — we don't need DB for these pure methods
            }

            public function exposedBuildOgTags(array $data, int $thesisId, string $metaDescription): array
            {
                return $this->buildOgTags($data, $thesisId, $metaDescription);
            }

            public function exposedBuildMetaDescription(string $synopsis): string
            {
                return $this->buildMetaDescription($synopsis);
            }

            public function exposedResolveOgImage(array $files): string
            {
                return $this->resolveOgImage($files);
            }
        };
    }

    // ── buildOgTags() ─────────────────────────────────────────────────────────

    public function testBuildOgTagsReturnsAllRequiredKeys(): void
    {
        $ctrl = self::makeController();
        $data = [
            'title'   => 'My Thesis',
            'authors' => 'Jane Doe',
            'year'    => '2024',
            'files'   => [],
        ];

        $tags = $ctrl->exposedBuildOgTags($data, 42, 'A description');

        $requiredKeys = ['type', 'title', 'description', 'url', 'image', 'image_alt', 'site_name', 'article_author', 'article_published_time'];
        foreach ($requiredKeys as $key) {
            $this->assertArrayHasKey($key, $tags);
            $this->assertIsString($tags[$key]);
        }
    }

    public function testBuildOgTagsTitleIncludesAuthors(): void
    {
        $ctrl = self::makeController();
        $data = [
            'title'   => 'The Title',
            'authors' => 'Author Name',
            'year'    => '2024',
            'files'   => [],
        ];

        $tags = $ctrl->exposedBuildOgTags($data, 1, 'desc');

        $this->assertStringContainsString('The Title – Author Name', $tags['title']);

        // Without authors, just the title
        $data['authors'] = '';
        $tags2 = $ctrl->exposedBuildOgTags($data, 1, 'desc');
        $this->assertSame('The Title', $tags2['title']);
    }

    public function testBuildOgTagsImageEmptyWhenNoFiles(): void
    {
        $ctrl = self::makeController();
        $data = [
            'title'   => 'No Files',
            'authors' => 'A',
            'year'    => '2023',
            'files'   => [],
        ];

        $tags = $ctrl->exposedBuildOgTags($data, 5, 'desc');
        $this->assertSame('', $tags['image']);
    }

    public function testBuildOgTagsImageFromCover(): void
    {
        $ctrl = self::makeController();
        $data = [
            'title'   => 'Cover Test',
            'authors' => 'Author',
            'year'    => '2024',
            'files'   => [
                ['file_path' => 'documents/2024-001/cover.jpg', 'file_type' => 'cover'],
            ],
        ];

        $tags = $ctrl->exposedBuildOgTags($data, 1, 'desc');

        $this->assertStringContainsString('cover.jpg', $tags['image']);
    }

    public function testBuildOgTagsImageFallbackToFirstImage(): void
    {
        $ctrl = self::makeController();
        $data = [
            'title'   => 'Image Test',
            'authors' => 'B',
            'year'    => '2024',
            'files'   => [
                ['file_path' => 'documents/2024-001/doc.pdf', 'file_type' => 'tfe'],
                ['file_path' => 'documents/2024-001/screenshot.png', 'file_type' => 'tfe'],
            ],
        ];

        $tags = $ctrl->exposedBuildOgTags($data, 2, 'desc');

        $this->assertStringContainsString('screenshot.png', $tags['image']);
    }

    public function testBuildOgTagsUrlIncludesThesisId(): void
    {
        $ctrl = self::makeController();
        $data = ['title' => 'URL Test', 'authors' => '', 'year' => '2024', 'files' => []];

        $tags = $ctrl->exposedBuildOgTags($data, 99, 'desc');

        $this->assertStringContainsString('tfe?id=99', $tags['url']);
    }

    public function testBuildOgTagsPublishedTimeFormatted(): void
    {
        $ctrl = self::makeController();
        $data = ['title' => 'T', 'authors' => '', 'year' => '2025', 'files' => []];

        $tags = $ctrl->exposedBuildOgTags($data, 1, 'desc');

        $this->assertSame('2025-01-01', $tags['article_published_time']);
    }

    public function testBuildOgTagsPublishedTimeEmptyWhenNoYear(): void
    {
        $ctrl = self::makeController();
        $data = ['title' => 'T', 'authors' => '', 'files' => []];

        $tags = $ctrl->exposedBuildOgTags($data, 1, 'desc');

        $this->assertSame('', $tags['article_published_time']);
    }

    // ── buildMetaDescription() ────────────────────────────────────────────────

    public function testBuildMetaDescriptionTruncatesLongSynopsis(): void
    {
        $ctrl = self::makeController();
        $long = str_repeat('abcdefghij', 20); // 200 chars
        $desc = $ctrl->exposedBuildMetaDescription($long);

        $this->assertLessThanOrEqual(160, strlen($desc));
        $this->assertStringEndsWith('…', $desc);
    }

    public function testBuildMetaDescriptionKeepsShortSynopsis(): void
    {
        $ctrl = self::makeController();
        $desc = $ctrl->exposedBuildMetaDescription('A short synopsis.');

        $this->assertSame('A short synopsis.', $desc);
    }

    public function testBuildMetaDescriptionEmptySynopsisReturnsDefault(): void
    {
        $ctrl = self::makeController();
        $desc = $ctrl->exposedBuildMetaDescription('');

        $this->assertStringContainsString('Mémoire', $desc);
        $this->assertStringContainsString('XAMXAM', $desc);
    }

    public function testBuildMetaDescriptionStripsHtmlTags(): void
    {
        $ctrl = self::makeController();
        $desc = $ctrl->exposedBuildMetaDescription('<p>Hello <b>world</b></p>');

        $this->assertStringNotContainsString('<p>', $desc);
        $this->assertStringNotContainsString('<b>', $desc);
        $this->assertStringContainsString('Hello world', $desc);
    }
}