// 공통 JavaScript 기능들

// API 호출 헬퍼
async function apiCall(url, options = {}) {
    const defaultOptions = {
        headers: {
            'Content-Type': 'application/json',
        },
    };
    
    const response = await fetch(url, { ...defaultOptions, ...options });
    
    if (!response.ok) {
        throw new Error(`HTTP error! status: ${response.status}`);
    }
    
    return response.json();
}

// 파일 크기 포맷팅
function formatFileSize(bytes) {
    if (bytes === 0) return '0 Bytes';
    const k = 1024;
    const sizes = ['Bytes', 'KB', 'MB', 'GB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
}

// 날짜 포맷팅
function formatDate(dateString) {
    const date = new Date(dateString);
    return date.toLocaleString('ko-KR');
}

// 토스트 알림
function showToast(message, type = 'info') {
    const toast = document.createElement('div');
    toast.className = `alert alert-${type} toast`;
    toast.textContent = message;
    toast.style.cssText = `
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 1000;
        min-width: 300px;
        animation: slideIn 0.3s ease;
    `;
    
    document.body.appendChild(toast);
    
    setTimeout(() => {
        toast.style.animation = 'slideOut 0.3s ease';
        setTimeout(() => {
            document.body.removeChild(toast);
        }, 300);
    }, 3000);
}

// 로딩 상태 관리
function setLoading(element, loading = true) {
    if (loading) {
        element.disabled = true;
        element.innerHTML = '<span class="spinner"></span> 처리 중...';
    } else {
        element.disabled = false;
        element.innerHTML = element.getAttribute('data-original-text') || '완료';
    }
}

// 애니메이션 CSS 추가
const style = document.createElement('style');
style.textContent = `
    @keyframes slideIn {
        from { transform: translateX(100%); opacity: 0; }
        to { transform: translateX(0); opacity: 1; }
    }
    
    @keyframes slideOut {
        from { transform: translateX(0); opacity: 1; }
        to { transform: translateX(100%); opacity: 0; }
    }
    
    .toast {
        animation: slideIn 0.3s ease;
    }
`;
document.head.appendChild(style);