import { sys } from 'cc';

/**
 * 本地存储管理器
 * 统一管理用户数据的本地持久化存储
 */
export class StorageManager {
    /** 生命值存储键 */
    private static readonly KEY_LIVES = 'game_lives';

    /** 默认生命值 */
    private static readonly DEFAULT_LIVES = 10;

    /** 最小生命值 */
    private static readonly MIN_LIVES = 0;

    // ==================== 生命值管理 ====================

    /**
     * 获取当前生命值
     * @returns 当前生命值，新用户返回默认值 10
     */
    static getLives(): number {
        const stored = sys.localStorage.getItem(StorageManager.KEY_LIVES);
        if (stored === null || stored === '') {
            // 新用户，设置默认值
            StorageManager.setLives(StorageManager.DEFAULT_LIVES);
            return StorageManager.DEFAULT_LIVES;
        }
        const lives = parseInt(stored, 10);
        // 防止异常数据
        if (isNaN(lives) || lives < 0) {
            StorageManager.setLives(StorageManager.DEFAULT_LIVES);
            return StorageManager.DEFAULT_LIVES;
        }
        return lives;
    }

    /**
     * 设置生命值
     * @param lives 生命值
     */
    static setLives(lives: number): void {
        const validLives = Math.max(StorageManager.MIN_LIVES, lives);
        sys.localStorage.setItem(StorageManager.KEY_LIVES, validLives.toString());
        console.log(`[StorageManager] 生命值已更新: ${validLives}`);
    }

    /**
     * 消耗一颗生命
     * @returns 是否消耗成功（生命值不足时返回 false）
     */
    static consumeLife(): boolean {
        const currentLives = StorageManager.getLives();
        if (currentLives <= 0) {
            console.warn('[StorageManager] 生命值不足，无法消耗');
            return false;
        }
        StorageManager.setLives(currentLives - 1);
        return true;
    }

    /**
     * 增加一颗生命
     */
    static addLife(): void {
        const currentLives = StorageManager.getLives();
        StorageManager.setLives(currentLives + 1);
        console.log(`[StorageManager] 获得一颗生命，当前生命值: ${currentLives + 1}`);
    }

    /**
     * 检查是否有足够的生命值
     * @returns 是否有生命值
     */
    static hasLives(): boolean {
        return StorageManager.getLives() > 0;
    }

    /**
     * 重置生命值为默认值
     */
    static resetLives(): void {
        StorageManager.setLives(StorageManager.DEFAULT_LIVES);
        console.log('[StorageManager] 生命值已重置为默认值');
    }
}