<?php

declare(strict_types=1);

namespace app\common\library;

/**
 * 游戏奖励配置：默认模板（与 resource/game_reward_config_template.json 一致）
 */
class GameRewardConfigTemplate
{
    private static ?array $cached = null;

    public static function templatePath(): string
    {
        return dirname(__DIR__, 3) . DIRECTORY_SEPARATOR . 'resource' . DIRECTORY_SEPARATOR . 'game_reward_config_template.json';
    }

    /**
     * @return array{tier_reward_form: string, bigwin_form: string}
     */
    public static function getDefaultJsonColumns(): array
    {
        if (self::$cached !== null) {
            return self::$cached;
        }
        $path = self::templatePath();
        if (!is_file($path)) {
            throw new \RuntimeException('game_reward_config_template.json missing: ' . $path);
        }
        $raw = file_get_contents($path);
        if ($raw === false || trim($raw) === '') {
            throw new \RuntimeException('game_reward_config_template.json read failed');
        }
        $decoded = json_decode($raw, true);
        if (!is_array($decoded)) {
            throw new \RuntimeException('game_reward_config_template.json invalid JSON');
        }
        $tier = $decoded['tier_reward_form'] ?? null;
        $big = $decoded['bigwin_form'] ?? null;
        if (!is_array($tier) || !is_array($big)) {
            throw new \RuntimeException('game_reward_config_template.json missing tier_reward_form or bigwin_form');
        }
        $tierJson = json_encode($tier, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        $bigJson = json_encode($big, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        if (!is_string($tierJson) || !is_string($bigJson)) {
            throw new \RuntimeException('game_reward_config_template encode failed');
        }
        self::$cached = [
            'tier_reward_form' => $tierJson,
            'bigwin_form'      => $bigJson,
        ];
        return self::$cached;
    }
}