<?php
declare(strict_types=1);
namespace App\Tests;

use App\Http\Request;
use App\Auth\ArraySessionStore;
use App\Dashboard\HeatmapController;
use App\Tests\Support\InMemoryEventRepository;
use PHPUnit\Framework\TestCase;

final class HeatmapTest extends TestCase
{
    private function sess(?string $site = null): ArraySessionStore
    {
        $s = new ArraySessionStore();
        $s->set('user_id', 1);
        if ($site !== null) $s->set('site_scope', $site);
        return $s;
    }

    private function repo(): InMemoryEventRepository
    {
        $r = new InMemoryEventRepository();
        $base = ['device_id' => 'pi-1', 'event_type' => 'near_fall', 'severity' => 'info',
                 'metrics' => [], 'occurred_at' => (float)time()];
        // array_merge: the per-row override must WIN over $base (the `+` operator keeps the left
        // side's keys, which silently discarded the old-row occurred_at override).
        $r->insert(array_merge($base, ['camera_id' => 'cam-1', 'site' => 'a', 'spatial_x' => 0.4, 'spatial_y' => 0.6]));
        $r->insert(array_merge($base, ['camera_id' => 'cam-1', 'site' => 'b', 'spatial_x' => 0.1, 'spatial_y' => 0.1]));
        $r->insert(array_merge($base, ['camera_id' => 'cam-2', 'site' => 'a', 'spatial_x' => 0.9, 'spatial_y' => 0.9]));
        $r->insert(array_merge($base, ['camera_id' => 'cam-1', 'site' => 'a']));           // no spatial
        $r->insert(array_merge($base, ['camera_id' => 'cam-1', 'site' => 'a', 'spatial_x' => 0.5,
                            'spatial_y' => 0.5, 'occurred_at' => (float)(time() - 400 * 86400)])); // too old
        return $r;
    }

    private function req(string $days = ''): Request
    {
        $q = $days === '' ? [] : ['days' => $days];
        return new Request('GET', '/api/heatmap/cam-1', [], '', $q, []);
    }

    public function testRequiresLogin(): void
    {
        $c = new HeatmapController($this->repo(), new ArraySessionStore());
        $this->assertSame(401, $c->json($this->req(), ['camera' => 'cam-1'])->status());
    }

    public function testReturnsCameraPointsWithinWindow(): void
    {
        $c = new HeatmapController($this->repo(), $this->sess());
        $res = $c->json($this->req(), ['camera' => 'cam-1']);
        $this->assertSame(200, $res->status());
        $data = json_decode($res->body(), true);
        $this->assertSame(30, $data['days']);
        // cam-2's point, the spatial-less row, and the 400-day-old row are all excluded.
        $this->assertCount(2, $data['points']);
        foreach ($data['points'] as $p) {
            $this->assertArrayHasKey('x', $p);
            $this->assertArrayHasKey('y', $p);
            $this->assertSame('near_fall', $p['event_type']);
        }
    }

    public function testSiteScopeFiltersPoints(): void
    {
        $c = new HeatmapController($this->repo(), $this->sess('a'));
        $data = json_decode($c->json($this->req(), ['camera' => 'cam-1'])->body(), true);
        $this->assertCount(1, $data['points']);   // site-b point excluded
        $this->assertSame(0.4, $data['points'][0]['x']);
    }

    public function testDaysClamped(): void
    {
        $c = new HeatmapController($this->repo(), $this->sess());
        $this->assertSame(90, json_decode($c->json($this->req('9999'), ['camera' => 'cam-1'])->body(), true)['days']);
        $this->assertSame(30, json_decode($c->json($this->req('abc'), ['camera' => 'cam-1'])->body(), true)['days']);
    }

    public function testMissingCameraIs400(): void
    {
        $c = new HeatmapController($this->repo(), $this->sess());
        $this->assertSame(400, $c->json($this->req(), [])->status());
    }
}