<?php

declare(strict_types=1);

namespace Tests\Unit\Game;

use App\Game\Entities\Zombie;
use App\Game\EntityList;
use App\Game\InputState;
use App\Game\Player;
use App\Game\Room;
use App\Game\Vector2;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;

final class ZombieTest extends TestCase
{
    #[Test]
    public function zombieChasesTarget(): void
    {
        $room = new Room('test');
        $list = $room->entities;
        $player = new Player('p1', 'Tester', new InputState(), $list, $room, ['x' => 100.0, 'y' => 0.0]);
        $room->addPlayer($player);
        $zombie = new Zombie(0.0, 0.0, $list, $room, ['emergeTime' => 0.0]);
        $list->append($zombie);
        $zombie->target = $player;
        $zombie->update(0.1);
        $this->assertGreaterThan(0.0, $zombie->pos->x, 'zombie moves toward player x');
        $this->assertEqualsWithDelta(0.0, $zombie->pos->y, 1e-6, 'zombie stays on same y');
    }

    #[Test]
    public function hitReducesHealthAndKnocksBack(): void
    {
        $room = new Room('test');
        $zombie = new Zombie(10.0, 0.0, $room->entities, $room);
        $impulse = new Vector2(1.0, 0.0);
        $dead = $zombie->hit($impulse, 1);
        $this->assertTrue($dead);
        $this->assertSame(0, $zombie->health);
    }

    #[Test]
    public function hitDoesNotKillAtHighHealth(): void
    {
        $room = new Room('test');
        $zombie = new Zombie(10.0, 0.0, $room->entities, $room, ['health' => 10]);
        $dead = $zombie->hit(new Vector2(1.0, 0.0), 1);
        $this->assertFalse($dead);
        $this->assertSame(9, $zombie->health);
    }

    #[Test]
    public function dieRemovesFromContainer(): void
    {
        $room = new Room('test');
        $zombie = new Zombie(5.0, 5.0, $room->entities, $room);
        $room->entities->append($zombie);
        $zombie->die();
        $this->assertCount(0, $room->entities);
    }

    #[Test]
    public function emergeBlocksMovement(): void
    {
        $room = new Room('test');
        $zombie = new Zombie(0.0, 0.0, $room->entities, $room, ['emergeTime' => 1.0]);
        $room->entities->append($zombie);
        $zombie->target = new Player('p1', 'T', new InputState(), $room->entities, $room, ['x' => 100.0, 'y' => 100.0]);
        $zombie->update(0.1);
        $this->assertSame(0.0, $zombie->pos->x, 'zombie blocked during emerge');
    }
}