<?php
namespace App\Tests;
use App\Game\XpCurve;
use App\Game\Run;
use App\Game\HordeArena;
use PHPUnit\Framework\TestCase;

final class XpCurveTest extends TestCase
{
    public function testClassRewardsAndEveryFourteenthHealingDropArePreserved(): void
    {
        self::assertSame(XpCurve::ACCESSIBLE,(new XpCurve())->model);
        foreach([XpCurve::CURRENT=>[2,2,2,5],XpCurve::WEIGHTED=>[1,2,3,6],XpCurve::ACCESSIBLE=>[2,3,4,6]]as$model=>$values){
            $curve=new XpCurve($model);$run=new Run(HordeArena::build(),42,null,$curve);
            for($i=1;$i<=28;$i++){
                $type=['runner','guardian','enforcer','brute'][($i-1)%4];
                self::assertSame($values[($i-1)%4],$curve->reward($type));
                (new \ReflectionMethod($run,'spawnEnemyAt'))->invoke($run,0,.55,2,$type);
                (new \ReflectionMethod($run,'damage'))->invoke($run,array_key_first($run->enemies),100000);
                $p=$run->pickups[array_key_last($run->pickups)];
                self::assertSame($i%14===0?'health':'xp',$p['kind']);
                self::assertSame($i%14===0?14:$curve->reward($type),$p['value']);
            }
        }
    }

    public function testActualThresholdsAreMonotonicAndMatchTheAuditedTotals(): void
    {
        foreach([4=>19,8=>54,12=>100,16=>157,20=>225,24=>305]as$level=>$xp){
            self::assertSame($xp,XpCurve::totalForLevel($level));
            self::assertSame($level,XpCurve::levelForTotal($xp));
            self::assertSame($level-1,XpCurve::levelForTotal($xp-1));
        }
    }
    public function testCampaignMilestonesAreExplicitAndDoNotAlterLevelCosts(): void
    {
        $legacy=new XpCurve(XpCurve::ACCESSIBLE);
        $campaign=new XpCurve(XpCurve::ACCESSIBLE,XpCurve::CAMPAIGN_MILESTONES);
        foreach([3=>12,5=>27,8=>54,11=>87,14=>127,17=>173]as$level=>$total){
            self::assertSame($total,XpCurve::totalForLevel($level));
        }
        self::assertSame(0,$legacy->stageForLevel(3));
        self::assertSame(1,$campaign->stageForLevel(3));
        self::assertSame(5,$campaign->stageForLevel(16));
        self::assertSame(6,$campaign->stageForLevel(17));
        $run=new Run(HordeArena::build(),42,null,$campaign);
        $run->restoreProgression(['level'=>11],0);
        self::assertSame(4,$run->primaryStage);
        $d=new \App\Game\DifficultyDirector;
        self::assertSame(\App\Game\DifficultyDirector::primaryDpsEstimate(11,0,4),$d->snapshot($run)['primaryDps']);
        foreach(range(1,30)as$level)self::assertLessThanOrEqual(1,$campaign->stageForLevel($level+1)-$campaign->stageForLevel($level));
    }
}