class ExcelViewer {
    constructor(containerId) {
        this.container = document.getElementById(containerId);
        this.init();
    }
    
    init() {
        // Create a table structure that mimics Excel
        this.table = document.createElement('table');
        this.table.className = 'excel-table';
        this.container.appendChild(this.table);
    }
    
    loadData(data) {
        // Clear existing data
        this.table.innerHTML = '';
        
        // Create header row
        const headerRow = document.createElement('tr');
        Object.keys(data[0]).forEach(key => {
            const th = document.createElement('th');
            th.textContent = key;
            headerRow.appendChild(th);
        });
        this.table.appendChild(headerRow);
        
        // Create data rows
        data.forEach(item => {
            const row = document.createElement('tr');
            Object.values(item).forEach(value => {
                const td = document.createElement('td');
                td.textContent = value;
                row.appendChild(td);
            });
            this.table.appendChild(row);
        });
    }
    
    exportToExcel() {
        // Implementation for exporting to Excel
        // Would use SheetJS library
    }
}

// Export for use in other files
if (typeof module !== 'undefined' && module.exports) {
    module.exports = ExcelViewer;
} else {
    window.ExcelViewer = ExcelViewer;
}