<?php

declare(strict_types=1);

namespace BattleForge\Tests\Unit\Domain;

use BattleForge\Domain\Battlefield;
use BattleForge\Domain\Position;
use BattleForge\Domain\Terrain;
use InvalidArgumentException;
use PHPUnit\Framework\TestCase;

final class BattlefieldTest extends TestCase
{
    public function testItRejectsDimensionsOutsideTheSupportedRange(): void
    {
        $this->expectException(InvalidArgumentException::class);

        new Battlefield(7, 16);
    }

    public function testItFindsReachableTilesUsingTerrainCostsAndObstacles(): void
    {
        $battlefield = new Battlefield(8, 8, [
            '1:0' => Terrain::Forest,
            '0:1' => Terrain::Rough,
            '2:0' => Terrain::Water,
            '1:1' => Terrain::Blocking,
        ]);

        $reachable = $battlefield->reachable(
            new Position(0, 0),
            2,
            [new Position(0, 2)],
        );

        self::assertSame(0, $reachable['0:0']);
        self::assertSame(2, $reachable['1:0']);
        self::assertSame(2, $reachable['0:1']);
        self::assertArrayNotHasKey('2:0', $reachable);
        self::assertArrayNotHasKey('1:1', $reachable);
        self::assertArrayNotHasKey('0:2', $reachable);
    }
}