<?php

namespace Tests\Feature\Livewire;

use App\Enums\ActivityTypeEnum;
use App\Enums\ApprovalStatusEnum;
use App\Enums\PublishStatusEnum;
use App\Livewire\Dashboard;
use App\Models\ActivityLog;
use App\Models\Article;
use App\Models\Feed;
use App\Models\PlatformChannel;
use App\Models\RouteArticle;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\DB;
use Livewire\Features\SupportTesting\Testable;
use Livewire\Livewire;
use Tests\TestCase;

class DashboardTest extends TestCase
{
    use RefreshDatabase;

    public function test_it_defaults_to_the_current_month(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Livewire::test(Dashboard::class)
            ->assertSet('from', '2026-07-01')
            ->assertSet('to', '2026-07-31');
    }

    public function test_it_recomputes_stats_when_the_range_changes(): void
    {
        Article::factory()->count(3)->create(['created_at' => Carbon::parse('2026-07-10 12:00:00')]);

        Livewire::test(Dashboard::class)
            ->set('from', '2026-07-01')
            ->set('to', '2026-07-31')
            ->assertSee('3')
            ->set('from', '2026-08-01')
            ->set('to', '2026-08-31')
            ->assertSee('0');
    }

    public function test_it_populates_the_range_when_a_preset_is_applied(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Livewire::test(Dashboard::class)
            ->call('applyPreset', 'month')
            ->assertSet('from', '2026-07-01')
            ->assertSet('to', '2026-07-31');
    }

    public function test_it_applies_the_all_preset_as_a_bounded_range(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Livewire::test(Dashboard::class)
            ->call('applyPreset', 'all')
            ->assertSet('to', '2026-07-15');
    }

    public function test_it_ignores_an_unknown_preset(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Livewire::test(Dashboard::class)
            ->call('applyPreset', 'fortnight')
            ->assertSet('from', '2026-07-01')
            ->assertSet('to', '2026-07-31')
            ->assertHasNoErrors();
    }

    public function test_it_reports_an_inverted_range_against_the_end_date(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Livewire::test(Dashboard::class)
            ->set('from', '2026-07-31')
            ->set('to', '2026-07-01')
            ->assertHasErrors('to');
    }

    public function test_it_blames_the_start_date_when_the_start_date_is_malformed(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Livewire::test(Dashboard::class)
            ->set('from', 'not-a-date')
            ->assertHasErrors('from')
            ->assertHasNoErrors('to');
    }

    public function test_it_blames_the_end_date_when_the_end_date_is_malformed(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Livewire::test(Dashboard::class)
            ->set('to', 'not-a-date')
            ->assertHasErrors('to')
            ->assertHasNoErrors('from');
    }

    public function test_it_reports_zero_stats_for_an_invalid_range(): void
    {
        Article::factory()->create(['created_at' => Carbon::parse('2026-07-10 12:00:00')]);

        Livewire::test(Dashboard::class)
            ->set('from', '2026-07-01')
            ->set('to', 'not-a-date')
            ->assertSet('rangeIsValid', false);
    }

    public function test_it_marks_a_well_formed_range_as_valid(): void
    {
        Livewire::test(Dashboard::class)
            ->set('from', '2026-07-01')
            ->set('to', '2026-07-31')
            ->assertSet('rangeIsValid', true);
    }

    public function test_it_renders_the_preset_buttons(): void
    {
        Livewire::test(Dashboard::class)
            ->assertSee('This Month')
            ->assertSee('All Time');
    }

    public function test_it_renders_each_panel_in_its_own_island(): void
    {
        $html = Livewire::test(Dashboard::class)->html();

        foreach (['system-overview', 'article-statistics'] as $island) {
            $this->assertSame(
                1,
                substr_count($html, "[if FRAGMENT:type=island|name={$island}|"),
                "Expected exactly one [{$island}] island.",
            );
        }
    }

    /**
     * @param  Testable<Dashboard>  $component
     */
    private function islandFragments(Testable $component): string
    {
        /** @var array<int, string> $fragments */
        $fragments = $component->effects['islandFragments'] ?? [];

        return implode("\n", $fragments);
    }

    public function test_it_re_renders_the_article_statistics_island_when_the_range_changes(): void
    {
        Article::factory()->count(3)->create(['created_at' => Carbon::parse('2026-07-10 12:00:00')]);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertMatchesRegularExpression('/Articles Fetched.*?>\s*3\s*</s', $fragments);
    }

    public function test_it_reflects_a_narrowed_range_in_the_re_rendered_island(): void
    {
        Article::factory()->count(3)->create(['created_at' => Carbon::parse('2026-07-10 12:00:00')]);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-08-01', '2026-08-31')
        );

        $this->assertMatchesRegularExpression('/Articles Fetched.*?>\s*0\s*</s', $fragments);
    }

    public function test_it_refreshes_only_the_range_dependent_island(): void
    {
        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('name=article-statistics|', $fragments);
        $this->assertStringNotContainsString('name=system-overview|', $fragments);
        $this->assertStringNotContainsString('Active Feeds', $fragments);
    }

    public function test_it_renders_the_articles_per_feed_breakdown_on_mount(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        $feed = Feed::factory()->create(['name' => 'Example Feed']);

        Article::factory()->count(2)->create([
            'feed_id' => $feed->id,
            'created_at' => Carbon::parse('2026-07-15 09:00:00'),
        ]);

        Livewire::test(Dashboard::class)
            ->assertSee('Example Feed')
            ->assertSee('Articles per Feed');
    }

    public function test_it_counts_articles_per_feed_for_the_selected_range(): void
    {
        $feed = Feed::factory()->create(['name' => 'Example Feed']);

        Article::factory()->count(2)->create([
            'feed_id' => $feed->id,
            'created_at' => Carbon::parse('2026-07-10 12:00:00'),
        ]);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertMatchesRegularExpression('/Example Feed.*?>\s*2\s*/s', $fragments);
    }

    public function test_it_refreshes_the_articles_per_feed_island_when_the_range_changes(): void
    {
        Feed::factory()->create(['name' => 'Example Feed']);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('name=articles-per-feed|', $fragments);
        $this->assertStringContainsString('Example Feed', $fragments);
    }

    public function test_it_renders_the_publications_per_channel_breakdown_on_mount(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        PlatformChannel::factory()->create(['display_name' => 'Example Channel']);

        Livewire::test(Dashboard::class)
            ->assertSee('Publications per Channel')
            ->assertSee('Example Channel');
    }

    public function test_it_refreshes_the_publications_per_channel_island_when_the_range_changes(): void
    {
        PlatformChannel::factory()->create(['display_name' => 'Example Channel']);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('name=publications-per-channel|', $fragments);
        $this->assertStringContainsString('Example Channel', $fragments);
    }

    public function test_it_re_renders_the_article_statistics_island_when_a_preset_is_applied(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Article::factory()->count(2)->create(['created_at' => Carbon::parse('2026-07-15 09:00:00')]);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyPreset', 'month')
        );

        $this->assertMatchesRegularExpression('/Articles Fetched.*?>\s*2\s*</s', $fragments);
    }

    public function test_it_renders_the_trend_chart_on_mount(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        Article::factory()->create(['created_at' => Carbon::parse('2026-07-15 09:00:00')]);

        Livewire::test(Dashboard::class)
            ->assertSee('Fetched vs Published')
            ->assertSee('trendChart(', false)
            ->assertSee('x-ref="canvas"', false);
    }

    public function test_it_renders_the_trend_chart_in_its_own_island(): void
    {
        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('name=articles-trend|', $fragments);
    }

    public function test_it_refreshes_the_trend_island_when_the_range_changes(): void
    {
        Article::factory()->count(2)->create(['created_at' => Carbon::parse('2026-07-10 12:00:00')]);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('name=articles-trend|', $fragments);
        $this->assertStringContainsString('2026-07-10', $fragments);
        $this->assertStringContainsString('Fetched', $fragments);
        $this->assertStringContainsString('Published', $fragments);
    }

    public function test_it_reports_a_too_wide_range_instead_of_charting_it(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyPreset', 'all')
        );

        $this->assertStringContainsString('too wide to chart by day', $fragments);
        $this->assertStringNotContainsString('x-ref="canvas"', $fragments);
    }

    public function test_it_reports_an_empty_range_separately_from_a_too_wide_one(): void
    {
        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('No articles or publications in this range.', $fragments);
        $this->assertStringNotContainsString('too wide to chart by day', $fragments);
    }

    public function test_it_keys_the_chart_on_its_data_so_a_range_change_replaces_it(): void
    {
        Article::factory()->create(['created_at' => Carbon::parse('2026-07-10 12:00:00')]);
        Article::factory()->create(['created_at' => Carbon::parse('2026-08-10 12:00:00')]);

        $july = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $august = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-08-01', '2026-08-31')
        );

        if (preg_match('/wire:key="(chart-[a-f0-9]+)"/', $july, $julyKey) !== 1) {
            $this->fail('July fragments contained no chart key.');
        }

        if (preg_match('/wire:key="(chart-[a-f0-9]+)"/', $august, $augustKey) !== 1) {
            $this->fail('August fragments contained no chart key.');
        }

        $this->assertNotSame($julyKey[1], $augustKey[1]);
    }

    public function test_it_keys_each_chart_separately_when_their_payloads_match(): void
    {
        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        preg_match_all('/wire:key="(chart-[a-f0-9]+)"/', $fragments, $keys);

        $this->assertSame($keys[1], array_unique($keys[1]));
    }

    public function test_it_renders_the_approval_rate_chart_on_mount(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        RouteArticle::factory()->create([
            'approval_status' => ApprovalStatusEnum::APPROVED,
            'decided_at' => Carbon::parse('2026-07-15 09:00:00'),
        ]);

        Livewire::test(Dashboard::class)
            ->assertSee('Approval Rate')
            ->assertSee('trendChart(', false)
            ->assertSee('x-ref="canvas"', false);
    }

    public function test_it_refreshes_the_approval_rate_island_when_the_range_changes(): void
    {
        RouteArticle::factory()->create([
            'approval_status' => ApprovalStatusEnum::APPROVED,
            'decided_at' => Carbon::parse('2026-07-10 12:00:00'),
        ]);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('name=approval-rate|', $fragments);
        $this->assertStringContainsString('Approval Rate', $fragments);
        $this->assertStringContainsString('2026-07-10', $fragments);
    }

    public function test_it_charts_a_day_where_everything_was_rejected(): void
    {
        RouteArticle::factory()->create([
            'approval_status' => ApprovalStatusEnum::REJECTED,
            'decided_at' => Carbon::parse('2026-07-10 12:00:00'),
        ]);

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringNotContainsString('No approval decisions in this range.', $fragments);
    }

    public function test_it_reports_a_range_with_no_approval_decisions(): void
    {
        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('No approval decisions in this range.', $fragments);
    }

    public function test_it_renders_an_empty_trend_for_an_invalid_range(): void
    {
        Livewire::test(Dashboard::class)
            ->set('from', 'not-a-date')
            ->assertSee('Fetched vs Published')
            ->assertDontSee('x-ref="canvas"', false);
    }

    private function publishAttempt(PublishStatusEnum $status, string $updatedAt): void
    {
        $routeArticle = RouteArticle::factory()->create(['publish_status' => $status]);

        // Model::update() would re-stamp updated_at to now(); bypass via the query builder.
        RouteArticle::query()
            ->whereKey($routeArticle->getKey())
            ->update(['updated_at' => Carbon::parse($updatedAt)]);
    }

    public function test_it_renders_the_publish_success_rate_chart_on_mount(): void
    {
        Carbon::setTestNow('2026-07-15 13:45:00');

        $this->publishAttempt(PublishStatusEnum::PUBLISHED, '2026-07-15 09:00:00');

        Livewire::test(Dashboard::class)
            ->assertSee('Publish Success Rate')
            ->assertSee('trendChart(', false)
            ->assertSee('x-ref="canvas"', false);
    }

    public function test_it_refreshes_the_publish_success_rate_island_when_the_range_changes(): void
    {
        $this->publishAttempt(PublishStatusEnum::PUBLISHED, '2026-07-10 12:00:00');

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('name=publish-success-rate|', $fragments);
        $this->assertStringContainsString('Publish Success Rate', $fragments);
        $this->assertStringContainsString('2026-07-10', $fragments);
    }

    public function test_it_charts_a_day_where_every_publish_failed(): void
    {
        $this->publishAttempt(PublishStatusEnum::ERROR, '2026-07-10 12:00:00');

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringNotContainsString('No publish attempts in this range.', $fragments);
    }

    public function test_it_reports_a_range_with_no_publish_attempts(): void
    {
        $this->publishAttempt(PublishStatusEnum::SKIPPED, '2026-07-10 12:00:00');

        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        $this->assertStringContainsString('No publish attempts in this range.', $fragments);
    }

    public function test_it_lists_the_most_recent_activity(): void
    {
        ActivityLog::factory()->type(ActivityTypeEnum::PUBLISH)->loggedAt(Carbon::parse('2026-07-10 09:00:00'))->create(['message' => 'Older entry']);
        ActivityLog::factory()->type(ActivityTypeEnum::ERROR)->loggedAt(Carbon::parse('2026-07-12 09:00:00'))->create(['message' => 'Newer entry']);

        Livewire::test(Dashboard::class)
            ->assertSee('Recent Activity')
            ->assertSee('Newer entry')
            ->assertSee('Older entry')
            ->assertSeeInOrder(['Newer entry', 'Older entry']);
    }

    public function test_it_caps_the_activity_panel_at_five_entries(): void
    {
        foreach (range(1, 8) as $index) {
            ActivityLog::factory()
                ->loggedAt(Carbon::parse('2026-07-10 09:00:00')->addMinutes($index))
                ->create(['message' => "Entry {$index}"]);
        }

        $component = Livewire::test(Dashboard::class);

        $component->assertSee('Entry 8')->assertSee('Entry 4');
        $component->assertDontSee('Entry 3');
    }

    public function test_the_activity_panel_ignores_the_global_range(): void
    {
        ActivityLog::factory()
            ->loggedAt(Carbon::parse('2026-07-10 09:00:00'))
            ->create(['message' => 'Activity outside the range']);

        Livewire::test(Dashboard::class)
            ->call('applyRange', '2026-08-01', '2026-08-31')
            ->assertSee('Activity outside the range');
    }

    public function test_it_reports_an_empty_activity_panel(): void
    {
        Livewire::test(Dashboard::class)->assertSee('Nothing has happened yet.');
    }

    public function test_it_links_the_activity_panel_to_the_activity_page(): void
    {
        Livewire::test(Dashboard::class)->assertSee(route('activity'), false);
    }

    public function test_it_shows_the_feed_name_for_an_article_subject(): void
    {
        $feed = Feed::factory()->create(['name' => 'Belga News']);
        $article = Article::factory()->create(['feed_id' => $feed->id]);

        ActivityLog::factory()
            ->forSubject($article)
            ->create(['message' => 'Fetched something']);

        Livewire::test(Dashboard::class)
            ->assertSee('Fetched something')
            ->assertSee('Belga News');
    }

    public function test_it_renders_an_activity_entry_without_a_subject(): void
    {
        ActivityLog::factory()->create(['message' => 'Subjectless entry']);

        Livewire::test(Dashboard::class)->assertSee('Subjectless entry');
    }

    public function test_it_renders_an_activity_entry_whose_subject_was_deleted(): void
    {
        $article = Article::factory()->create();

        ActivityLog::factory()->forSubject($article)->create(['message' => 'Orphaned entry']);

        $article->delete();

        Livewire::test(Dashboard::class)->assertSee('Orphaned entry');
    }

    private function dashboardQueryCount(int $activityEntries): int
    {
        $feed = Feed::factory()->create();

        foreach (range(1, $activityEntries) as $index) {
            $article = Article::factory()->create(['feed_id' => $feed->id]);
            ActivityLog::factory()->forSubject($article)->create(['message' => "Entry {$index}"]);
        }

        DB::flushQueryLog();
        DB::enableQueryLog();
        Livewire::test(Dashboard::class);
        $queries = count(DB::getQueryLog());
        DB::disableQueryLog();

        return $queries;
    }

    public function test_it_does_not_fan_out_queries_per_activity_entry(): void
    {
        $this->assertSame(
            $this->dashboardQueryCount(1),
            $this->dashboardQueryCount(20),
        );
    }

    public function test_every_range_dependent_island_re_renders_on_a_range_change(): void
    {
        $fragments = $this->islandFragments(
            Livewire::test(Dashboard::class)->call('applyRange', '2026-07-01', '2026-07-31')
        );

        foreach (['articles-trend', 'approval-rate', 'publish-success-rate', 'articles-per-feed', 'publications-per-channel'] as $island) {
            $this->assertStringContainsString("name={$island}|", $fragments);
        }
    }
}