<?php
namespace App\Core;

class XocDiaAlgorithm implements GameAlgorithmInterface {

    public static function generateResult(): array {
        $coins = [];
        for ($i = 0; $i < 4; $i++) $coins[] = (rand(0, 1) === 0) ? 'red' : 'white';
        return $coins;
    }

    public static function generateControlledResult(array $bets, array $waterConfig, int $attempts = 100): array {
        if (empty($bets) || empty($waterConfig)) return self::generateResult();
        $bestResult = null;
        $bestProfit = PHP_INT_MIN;
        for ($i = 0; $i < $attempts; $i++) {
            $result = self::generateResult();
            $profit = self::calculatePlatformProfit($result, $bets);
            if ($profit > $bestProfit) { $bestProfit = $profit; $bestResult = $result; }
        }
        return $bestResult;
    }

    public static function checkWin(array $result, string $betType, string $betTarget): bool {
        $redCount = count(array_filter($result, fn($c) => $c === 'red'));
        switch ($betTarget) {
            case 'even': return ($redCount % 2 === 0);
            case 'odd': return ($redCount % 2 === 1);
            case '4red': return ($redCount === 4);
            case '4white': return ($redCount === 0);
            case '3red1white': return ($redCount === 3);
            case '1red3white': return ($redCount === 1);
            default: return false;
        }
    }

    public static function calculatePlatformProfit(array $result, array $bets): float {
        $totalBet = 0; $totalPayout = 0;
        foreach ($bets as $bet) {
            $amount = (float)$bet['amount'];
            $totalBet += $amount;
            if (self::checkWin($result, $bet['bet_type'], $bet['bet_target'] ?? $bet['bet_value'] ?? '')) {
                $totalPayout += $amount + $amount * (float)$bet['odds'];
            }
        }
        return $totalBet - $totalPayout;
    }

    public static function getResultTable(): ?string { return null; }

    public static function formatResultForStorage(array $result, int $periodId): array {
        $redCount = count(array_filter($result, fn($c) => $c === 'red'));
        return [
            'dice1' => ($result[0] === 'red') ? 1 : 0,
            'dice2' => ($result[1] === 'red') ? 1 : 0,
            'dice3' => ($result[2] === 'red') ? 1 : 0,
            'total' => $redCount,
        ];
    }

    public static function parseResultFromDb(array $row): array {
        return [
            ((int)($row['dice1'] ?? 0)) ? 'red' : 'white',
            ((int)($row['dice2'] ?? 0)) ? 'red' : 'white',
            ((int)($row['dice3'] ?? 0)) ? 'red' : 'white',
            // 第4个硬币从 result JSON 恢复，或根据 total 推断
            'white', // fallback
        ];
    }
}