/**
 * Print HTML content using iframe approach
 * @param {string} htmlContent - Complete HTML string to print
 * @param {string} additionalStyles - Optional additional CSS styles
 * @returns {Promise<void>}
 */
export async function printHtml(htmlContent, additionalStyles = '') {
    return new Promise((resolve, reject) => {
        try {
            // Create hidden iframe
            const iframe = document.createElement('iframe');
            iframe.style.position = 'absolute';
            iframe.style.width = '0px';
            iframe.style.height = '0px';
            iframe.style.border = 'none';
            iframe.style.visibility = 'hidden';
            document.body.appendChild(iframe);

            const doc = iframe.contentWindow.document;
            doc.open();
            
            // Write the complete HTML content
            doc.write(htmlContent);
            
            // Add additional styles if provided
            if (additionalStyles) {
                doc.write(`<style>${additionalStyles}</style>`);
            }
            
            doc.close();

            // Handle print completion
            iframe.contentWindow.onafterprint = () => {
                document.body.removeChild(iframe);
                resolve();
            };

            // Wait for content to load before printing
            iframe.contentWindow.onload = () => {
                console.log('Print content loaded');
                setTimeout(() => {
                    iframe.contentWindow.focus();
                    iframe.contentWindow.print();
                }, 300); // Allow rendering delay
            };

        } catch (error) {
            console.error('Error in printHtml:', error);
            reject(error);
        }
    });
}

/**
 * Print template with data binding
 * @param {object} template - Template object with elements and page config
 * @param {object} data - Data object for binding
 * @returns {Promise<void>}
 */
export async function printTemplate(template, data = {}) {
    const { generateHtml } = await import('./exportToHtml');
    const html = generateHtml(template, data);
    return printHtml(html);
}