<?php

declare(strict_types=1);

namespace Tests\Feature\Panel;

use App\Models\Page;
use App\Models\Project;
use App\Support\Health\Finding;
use App\Support\Health\HealthReport;
use App\Support\TranslationFreshness;
use Illuminate\Foundation\Testing\RefreshDatabase;
use PHPUnit\Framework\Attributes\Test;
use Tests\TestCase;

/**
 * Translations the original has moved on without.
 *
 * The fault this catches is the one nothing else can see: the text is there in
 * every language, so every screen calls the record finished, and one of those
 * languages has been saying something the source stopped saying. It is worked
 * out from the change history, so what these tests really hold still is that
 * the history is being read the way it is written.
 */
class StaleTranslationsTest extends TestCase
{
    use RefreshDatabase;

    protected function translated(): Page
    {
        return Page::factory()->published()->create([
            'title' => ['es' => 'Uno', 'en' => 'One', 'ca' => 'U'],
            'slug' => ['es' => 'uno', 'en' => 'one', 'ca' => 'u'],
            'body' => ['es' => 'Texto', 'en' => 'Text', 'ca' => 'Text'],
        ]);
    }

    #[Test]
    public function a_record_nobody_has_edited_is_not_out_of_date(): void
    {
        $page = $this->translated();

        // Written in three languages at once: whatever else is true of it,
        // none of them is behind another.
        $this->assertSame([], TranslationFreshness::for($page));
    }

    #[Test]
    public function editing_the_original_leaves_the_other_languages_behind(): void
    {
        $page = $this->translated();

        $this->travel(1)->days();
        $page->setTranslation('title', 'es', 'Uno corregido')->save();

        $stale = TranslationFreshness::for($page->fresh());

        $this->assertSame(['en', 'ca'], array_keys($stale));

        // And it says since when, which is what decides how urgent it is.
        $this->assertTrue($stale['ca']->isToday());
    }

    #[Test]
    public function catching_a_translation_up_clears_it(): void
    {
        $page = $this->translated();

        $this->travel(1)->days();
        $page->setTranslation('body', 'es', 'Texto nuevo')->save();

        $this->travel(1)->days();
        $page->fresh()->setTranslation('body', 'ca', 'Text nou')->save();

        $stale = TranslationFreshness::for($page->fresh());

        // Catalan caught up; English never did.
        $this->assertArrayNotHasKey('ca', $stale);
        $this->assertArrayHasKey('en', $stale);
    }

    /**
     * A language with nothing in it is not out of date, it is untranslated —
     * and there is already a check that says so. Reporting both about one
     * record would just make two lists that never empty.
     */
    #[Test]
    public function a_missing_translation_is_not_a_stale_one(): void
    {
        $page = Page::factory()->published()->create([
            'title' => ['es' => 'Uno'],
            'slug' => ['es' => 'uno'],
        ]);

        $this->travel(1)->days();
        $page->setTranslation('title', 'es', 'Uno corregido')->save();

        $this->assertSame([], TranslationFreshness::for($page->fresh()));
    }

    /**
     * Renaming the Spanish address does not make the Catalan text less true,
     * and slugs are the one translatable field that routinely changes on their
     * own — counting them would mark half the site out of date the first time
     * somebody tidied a URL.
     */
    #[Test]
    public function renaming_a_slug_does_not_make_a_translation_stale(): void
    {
        $page = $this->translated();

        $this->travel(1)->days();
        $page->setTranslation('slug', 'es', 'uno-mejor')->save();

        $this->assertSame([], TranslationFreshness::for($page->fresh()));
    }

    #[Test]
    public function editing_a_translation_does_not_make_the_original_stale(): void
    {
        $page = $this->translated();

        $this->travel(1)->days();
        $page->setTranslation('title', 'ca', 'U corregit')->save();

        // The source language is never reported against itself, and touching
        // Catalan says nothing about English.
        $this->assertSame([], TranslationFreshness::for($page->fresh()));
    }

    #[Test]
    public function the_health_check_reports_it(): void
    {
        $page = $this->translated();

        $this->travel(1)->days();
        $page->setTranslation('body', 'es', 'Texto corregido')->save();

        $finding = app(HealthReport::class)->runAll()->firstWhere('key', 'stale-translations');

        $this->assertInstanceOf(Finding::class, $finding);
        $this->assertSame(1, $finding->count);
        $this->assertStringContainsString('ca', $finding->samples[0]);
    }

    #[Test]
    public function it_works_for_every_translated_type(): void
    {
        $project = Project::factory()->published()->create([
            'title' => ['es' => 'Proyecto', 'ca' => 'Projecte'],
            'slug' => ['es' => 'proyecto', 'ca' => 'projecte'],
        ]);

        $this->travel(1)->days();
        $project->setTranslation('title', 'es', 'Proyecto nuevo')->save();

        $this->assertArrayHasKey('ca', TranslationFreshness::for($project->fresh()));
    }

    /**
     * The filter's half: the answer cannot be a SQL condition, so it is worked
     * out per record and handed to the query as a list.
     */
    #[Test]
    public function the_panel_can_ask_for_the_ones_that_fell_behind(): void
    {
        $behind = $this->translated();
        $fine = $this->translated();

        $this->travel(1)->days();
        $behind->setTranslation('title', 'es', 'Uno corregido')->save();

        $ids = TranslationFreshness::staleIds(Page::query());

        $this->assertContains($behind->id, $ids);
        $this->assertNotContains($fine->id, $ids);
    }

    /**
     * The answer is cached against the record's `updated_at`, so it has to be
     * recomputed the moment anything about that record changes.
     */
    #[Test]
    public function the_cached_answer_does_not_survive_the_next_edit(): void
    {
        $page = $this->translated();

        $this->assertSame([], TranslationFreshness::for($page));

        $this->travel(1)->days();
        $page->setTranslation('title', 'es', 'Uno corregido')->save();

        $this->assertNotSame([], TranslationFreshness::for($page->fresh()));
    }
}