// 历史记录相关方法
export function getHistoryFromStorage() {
    const data = localStorage.getItem('loginHistory');
    return data ? JSON.parse(data) : [];
}

export function saveHistoryToStorage(history) {
    localStorage.setItem('loginHistory', JSON.stringify(history));
}

// 日期时间格式化
export function formatDateTime(date) {
    const year = date.getFullYear();
    const month = String(date.getMonth() + 1).padStart(2, '0');
    const day = String(date.getDate()).padStart(2, '0');
    const hours = String(date.getHours()).padStart(2, '0');
    const minutes = String(date.getMinutes()).padStart(2, '0');
    return `${year}-${month}-${day} ${hours}:${minutes}`;
}

// 检查密码是否有效
export function isValid(expiryTime) {
    return new Date(expiryTime) > new Date();
}

// 计算剩余时间
export function getRemainingTime(expiryTime) {
    const now = new Date();
    const expiry = new Date(expiryTime);
    const diff = expiry - now;

    if (diff <= 0) {
        return '已过期';
    }

    const hours = Math.floor(diff / (1000 * 60 * 60));
    const minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60));

    if (hours > 0) {
        return `${hours}小时${minutes}分钟`;
    } else {
        return `${minutes}分钟`;
    }
}

// 生成验证码
export function generateCode() {
    return Math.floor(Math.random() * 1000000).toString().padStart(6, '0');
}

// 生成密码（6位数字）
export function generatePassword() {
    return Math.floor(Math.random() * 1000000).toString().padStart(6, '0');
}

// 显示消息提示
export function showMessage(message, type = 'error') {
    const messageDiv = document.createElement('div');
    messageDiv.className = 'message-toast';
    messageDiv.textContent = message;
    messageDiv.style.cssText = `
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: ${type === 'success' ? '#4CAF50' : '#f44336'};
        color: white;
        padding: 16px 24px;
        border-radius: 8px;
        font-size: 14px;
        z-index: 9999;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        animation: slideDown 0.3s ease-out;
    `;

    // 添加样式
    if (!document.getElementById('toast-styles')) {
        const style = document.createElement('style');
        style.id = 'toast-styles';
        style.textContent = `
            @keyframes slideDown {
                from {
                    opacity: 0;
                    transform: translate(-50%, -60%);
                }
                to {
                    opacity: 1;
                    transform: translate(-50%, -50%);
                }
            }
        `;
        document.head.appendChild(style);
    }

    document.body.appendChild(messageDiv);

    setTimeout(() => {
        messageDiv.style.animation = 'slideDown 0.3s ease-out reverse';
        setTimeout(() => {
            document.body.removeChild(messageDiv);
        }, 300);
    }, 2000);
}

// 复制到剪贴板
export function copyToClipboard(text) {
    return navigator.clipboard.writeText(text).catch(() => {
        // 备用方案
        const textarea = document.createElement('textarea');
        textarea.value = text;
        document.body.appendChild(textarea);
        textarea.select();
        document.execCommand('copy');
        document.body.removeChild(textarea);
    });
}