<?php

namespace Tests;

use App\Engine\HdRenderer;
use PHPUnit\Framework\TestCase;
use Symfony\Component\Yaml\Yaml;

/** Phones: the on-screen buttons send keys the game binds, a touch is never a shot by itself. */
final class ControlsTest extends TestCase
{
    public function testThePhoneFireAndUseButtonsSendKeysBoundToFireAndUse(): void
    {
        $project = Yaml::parseFile(dirname(__DIR__) . '/config/project.yaml')['project'];
        $actions = Yaml::parseFile(dirname(__DIR__) . '/config/input.yaml')['actions'];
        // the page's touch.js knows single letters, arrows, Space, Return, Escape, Tab, Backspace
        foreach (['a' => 'fire', 'b' => 'use'] as $button => $action) {
            $key = (string)$project['touch'][$button];
            self::assertMatchesRegularExpression('/^([A-Z]|Space|Return|Escape|Tab)$/', $key, "button $button");
            self::assertContains($key, $actions[$action], "button $button fires '$action'");
        }
    }

    public function testATouchOfTheStickIsNotAShot(): void
    {
        // on phones a touch is also a mouse click: the mouse must not be bound to "fire"
        $actions = Yaml::parseFile(dirname(__DIR__) . '/config/input.yaml')['actions'];
        foreach ($actions['fire'] as $binding) {
            self::assertStringStartsNotWith('mouse:', (string)$binding);
            self::assertStringStartsNotWith('touch:', (string)$binding);
        }
    }

    public function testScale2xDoublesAPictureAndSmoothsItsStaircases(): void
    {
        // a diagonal staircase of 'a' over 'b'
        $px = "abb" . "aab" . "aaa";
        $big = HdRenderer::scale2x($px, 3, 3, false);
        self::assertSame(36, strlen($big));
        self::assertSame('a', $big[0]);
        self::assertSame('b', $big[5]);
        // the corner of the staircase gets the colour of its neighbours
        self::assertSame('a', $big[1 * 6 + 2]);
    }
}