services/pdfService.ts

import { jsPDF } from 'jspdf';
import type { ComicSeries, ComicIteration } from '../types';

export const createMangaPdf = (images: string[], title: string): void => {
    console.log('createMangaPdf called with:', { imageCount: images.length, title });
    
    if (images.length === 0) {
        console.error('No images provided for PDF creation');
        return;
    }
    
    // Create PDF with first image dimensions to maintain aspect ratio
    let doc: jsPDF | null = null;

    images.forEach((imgData, index) => {
        if (index === 0) {
            // Use jsPDF's built-in method to get image properties
            try {
                const imgProps = (doc as any)?.getImageProperties ? 
                    (doc as any).getImageProperties(`data:image/jpeg;base64,${imgData}`) : 
                    null;
                
                // If we can't get properties, create a temporary jsPDF instance to get them
                if (!imgProps) {
                    const tempDoc = new jsPDF();
                    const tempImgProps = (tempDoc as any).getImageProperties(`data:image/jpeg;base64,${imgData}`);
                    var aspectRatio = tempImgProps.width / tempImgProps.height;
                    console.log('Image dimensions from temp doc:', { width: tempImgProps.width, height: tempImgProps.height, aspectRatio });
                } else {
                    var aspectRatio = imgProps.width / imgProps.height;
                    console.log('Image dimensions:', { width: imgProps.width, height: imgProps.height, aspectRatio });
                }
            } catch (error) {
                // Fallback: assume standard comic book aspect ratio (3:4 portrait)
                console.warn('Could not determine image dimensions, using default comic aspect ratio:', error);
                var aspectRatio = 3 / 4; // Standard comic book ratio
            }
            
            // Scale to reasonable print size while maintaining aspect ratio
            // Use a base size and scale according to aspect ratio
            const baseSize = 200; // mm - base dimension for the larger side
            
            let pageWidth, pageHeight;
            if (aspectRatio > 1) {
                // Landscape/Wide format
                pageWidth = baseSize;
                pageHeight = baseSize / aspectRatio;
            } else {
                // Portrait/Tall format  
                pageHeight = baseSize;
                pageWidth = baseSize * aspectRatio;
            }
            
            console.log('PDF page dimensions:', { pageWidth, pageHeight, aspectRatio });
            
            doc = new jsPDF({
                orientation: aspectRatio > 1 ? 'landscape' : 'portrait',
                unit: 'mm',
                format: [pageWidth, pageHeight]
            });
            
            // Add first image filling entire page with no margins
            doc.addImage(`data:image/jpeg;base64,${imgData}`, 'JPEG', 0, 0, pageWidth, pageHeight);
        } else {
            // For subsequent pages, maintain the same format as the first page
            if (doc) {
                doc.addPage();
                const pageSize = doc.internal.pageSize;
                const currentWidth = pageSize.getWidth();
                const currentHeight = pageSize.getHeight();
                doc.addImage(`data:image/jpeg;base64,${imgData}`, 'JPEG', 0, 0, currentWidth, currentHeight);
            }
        }
    });

    const safeTitle = title.replace(/[^a-z0-9]/gi, '_').toLowerCase();
    const filename = `${safeTitle}_manga.pdf`;
    console.log('Saving PDF with filename:', filename);
    
    try {
        doc.save(filename);
        console.log('PDF save command executed successfully');
    } catch (error) {
        console.error('Error saving PDF:', error);
    }
};

/**
 * Creates a comprehensive PDF from a complete comic series with multiple iterations
 * Uses the aspect ratio of the first image in the series
 */
export const createComicSeriesPdf = (comicSeries: ComicSeries): void => {
    console.log('createComicSeriesPdf called with:', { iterations: comicSeries.iterations.length, seriesTitle: comicSeries.seriesTitle });
    
    // Get dimensions from the first image in the first iteration
    const firstIteration = comicSeries.iterations[0];
    if (!firstIteration || firstIteration.images.length === 0) {
        console.error('No images found in comic series');
        return;
    }
    
    const firstImageData = firstIteration.images[0];
    
    // Use jsPDF's built-in method to get image properties
    let aspectRatio;
    try {
        const tempDoc = new jsPDF();
        const imgProps = (tempDoc as any).getImageProperties(`data:image/jpeg;base64,${firstImageData}`);
        aspectRatio = imgProps.width / imgProps.height;
        console.log('Series image dimensions:', { width: imgProps.width, height: imgProps.height, aspectRatio });
    } catch (error) {
        console.warn('Could not determine series image dimensions, using default comic aspect ratio:', error);
        aspectRatio = 3 / 4; // Standard comic book ratio
    }
    
    // Use same sizing logic as single comic PDF
    const baseSize = 200;
    let pdfWidth, pdfHeight;
    if (aspectRatio > 1) {
        pdfWidth = baseSize;
        pdfHeight = baseSize / aspectRatio;
    } else {
        pdfHeight = baseSize;
        pdfWidth = baseSize * aspectRatio;
    }
    
    console.log('Series PDF dimensions:', { pdfWidth, pdfHeight, aspectRatio });
    
    const doc = new jsPDF({
        orientation: aspectRatio > 1 ? 'landscape' : 'portrait',
        unit: 'mm',
        format: [pdfWidth, pdfHeight]
    });

    let isFirstPage = true;
    let totalPages = 0;

    // Add title page for the series
    if (isFirstPage) {
        // Create a series title page
        doc.setFillColor(20, 20, 30);
        doc.rect(0, 0, pdfWidth, pdfHeight, 'F');
        
        // Title
        doc.setTextColor(255, 255, 255);
        doc.setFontSize(24);
        doc.setFont('helvetica', 'bold');
        const titleLines = doc.splitTextToSize(comicSeries.seriesTitle, pdfWidth - 20);
        const titleY = pdfHeight / 2 - 30;
        doc.text(titleLines, pdfWidth / 2, titleY, { align: 'center' });
        
        // Author
        doc.setFontSize(16);
        doc.setFont('helvetica', 'normal');
        doc.text(`By ${comicSeries.author}`, pdfWidth / 2, titleY + 20, { align: 'center' });
        
        // Series info
        doc.setFontSize(12);
        doc.text(`Complete Series • ${comicSeries.iterations.length} Chapters • ${comicSeries.totalPages} Pages`, 
                 pdfWidth / 2, titleY + 35, { align: 'center' });
        
        // Created date
        doc.setFontSize(10);
        doc.setTextColor(180, 180, 180);
        doc.text(`Created: ${comicSeries.createdAt.toLocaleDateString()}`, 
                 pdfWidth / 2, titleY + 50, { align: 'center' });
        
        // "Comic Genesis AI" attribution
        doc.text('Generated by Comic Genesis AI', 
                 pdfWidth / 2, pdfHeight - 20, { align: 'center' });
        
        isFirstPage = false;
        totalPages = 1;
    }

    // Add each iteration with separator pages
    comicSeries.iterations.forEach((iteration, iterationIndex) => {
        // Add chapter divider page (except for the first iteration)
        if (iterationIndex > 0) {
            doc.addPage();
            totalPages++;
            
            // Chapter divider page
            doc.setFillColor(30, 30, 40);
            doc.rect(0, 0, pdfWidth, pdfHeight, 'F');
            
            doc.setTextColor(255, 255, 255);
            doc.setFontSize(20);
            doc.setFont('helvetica', 'bold');
            
            const chapterTitle = `Chapter ${iterationIndex + 1}`;
            doc.text(chapterTitle, pdfWidth / 2, pdfHeight / 2 - 20, { align: 'center' });
            
            doc.setFontSize(16);
            doc.setFont('helvetica', 'normal');
            const iterationTitleLines = doc.splitTextToSize(iteration.title, pdfWidth - 20);
            doc.text(iterationTitleLines, pdfWidth / 2, pdfHeight / 2, { align: 'center' });
            
            doc.setFontSize(10);
            doc.setTextColor(180, 180, 180);
            doc.text(`${iteration.images.length} pages`, 
                     pdfWidth / 2, pdfHeight / 2 + 20, { align: 'center' });
        }

        // Add all images from this iteration
        iteration.images.forEach((imgData, imageIndex) => {
            if (!isFirstPage || imageIndex > 0) {
                doc.addPage();
                totalPages++;
            }
            
            try {
                // Fill entire page with image
                doc.addImage(`data:image/jpeg;base64,${imgData}`, 'JPEG', 0, 0, pdfWidth, pdfHeight);
                
                // Add page number footer
                doc.setFontSize(8);
                doc.setTextColor(120, 120, 120);
                doc.text(`${totalPages}`, pdfWidth - 10, pdfHeight - 5, { align: 'right' });
                
            } catch (error) {
                console.warn(`Failed to add image ${imageIndex} from iteration ${iterationIndex}:`, error);
                
                // Add error page
                doc.setFillColor(50, 50, 60);
                doc.rect(0, 0, pdfWidth, pdfHeight, 'F');
                doc.setTextColor(200, 200, 200);
                doc.setFontSize(12);
                doc.text('Image could not be loaded', pdfWidth / 2, pdfHeight / 2, { align: 'center' });
            }
            
            if (isFirstPage) {
                isFirstPage = false;
            }
        });
    });

    // Add final credits/summary page
    doc.addPage();
    totalPages++;
    
    doc.setFillColor(15, 15, 25);
    doc.rect(0, 0, pdfWidth, pdfHeight, 'F');
    
    doc.setTextColor(255, 255, 255);
    doc.setFontSize(18);
    doc.setFont('helvetica', 'bold');
    doc.text('The End', pdfWidth / 2, pdfHeight / 2 - 30, { align: 'center' });
    
    doc.setFontSize(12);
    doc.setFont('helvetica', 'normal');
    doc.text(`Complete Series: ${comicSeries.seriesTitle}`, pdfWidth / 2, pdfHeight / 2 - 10, { align: 'center' });
    doc.text(`By ${comicSeries.author}`, pdfWidth / 2, pdfHeight / 2 + 5, { align: 'center' });
    
    doc.setFontSize(10);
    doc.setTextColor(180, 180, 180);
    doc.text(`${comicSeries.iterations.length} chapters • ${totalPages} total pages`, 
             pdfWidth / 2, pdfHeight / 2 + 25, { align: 'center' });
    
    doc.text(`Generated: ${new Date().toLocaleDateString()}`, 
             pdfWidth / 2, pdfHeight / 2 + 40, { align: 'center' });
    
    doc.text('Powered by Comic Genesis AI & Google Gemini', 
             pdfWidth / 2, pdfHeight - 15, { align: 'center' });

    // Save the PDF
    const safeTitle = comicSeries.seriesTitle.replace(/[^a-z0-9]/gi, '_').toLowerCase();
    doc.save(`${safeTitle}_complete_series.pdf`);
};

/**
 * Creates a PDF from a single comic iteration with chapter formatting
 * Uses the aspect ratio of the first image in the iteration
 */
export const createIterationPdf = (iteration: ComicIteration, chapterNumber?: number): void => {
    if (iteration.images.length === 0) {
        console.error('No images found in iteration');
        return;
    }
    
    // Get dimensions from the first image using jsPDF
    const firstImageData = iteration.images[0];
    
    let aspectRatio;
    try {
        const tempDoc = new jsPDF();
        const imgProps = (tempDoc as any).getImageProperties(`data:image/jpeg;base64,${firstImageData}`);
        aspectRatio = imgProps.width / imgProps.height;
        console.log('Iteration image dimensions:', { width: imgProps.width, height: imgProps.height, aspectRatio });
    } catch (error) {
        console.warn('Could not determine iteration image dimensions, using default comic aspect ratio:', error);
        aspectRatio = 3 / 4; // Standard comic book ratio
    }
    
    // Use same sizing logic as other PDF functions
    const baseSize = 200;
    let pdfWidth, pdfHeight;
    if (aspectRatio > 1) {
        pdfWidth = baseSize;
        pdfHeight = baseSize / aspectRatio;
    } else {
        pdfHeight = baseSize;
        pdfWidth = baseSize * aspectRatio;
    }
    
    const doc = new jsPDF({
        orientation: aspectRatio > 1 ? 'landscape' : 'portrait',
        unit: 'mm',
        format: [pdfWidth, pdfHeight]
    });

    let isFirstPage = true;

    // Add chapter title page if chapter number is provided
    if (chapterNumber) {
        doc.setFillColor(20, 20, 30);
        doc.rect(0, 0, pdfWidth, pdfHeight, 'F');
        
        doc.setTextColor(255, 255, 255);
        doc.setFontSize(20);
        doc.setFont('helvetica', 'bold');
        doc.text(`Chapter ${chapterNumber}`, pdfWidth / 2, pdfHeight / 2 - 20, { align: 'center' });
        
        doc.setFontSize(16);
        doc.setFont('helvetica', 'normal');
        const titleLines = doc.splitTextToSize(iteration.title, pdfWidth - 20);
        doc.text(titleLines, pdfWidth / 2, pdfHeight / 2, { align: 'center' });
        
        doc.setFontSize(10);
        doc.text(`By ${iteration.author}`, pdfWidth / 2, pdfHeight / 2 + 20, { align: 'center' });
        
        isFirstPage = false;
    }

    // Add all images
    iteration.images.forEach((imgData, index) => {
        if (!isFirstPage || index > 0) {
            doc.addPage();
        }
        
        try {
            // Fill entire page with image
            doc.addImage(`data:image/jpeg;base64,${imgData}`, 'JPEG', 0, 0, pdfWidth, pdfHeight);
            
        } catch (error) {
            console.warn(`Failed to add image ${index}:`, error);
        }
        
        if (isFirstPage) {
            isFirstPage = false;
        }
    });

    const safeTitle = iteration.title.replace(/[^a-z0-9]/gi, '_').toLowerCase();
    const fileName = chapterNumber ? 
        `${safeTitle}_chapter_${chapterNumber}.pdf` : 
        `${safeTitle}.pdf`;
    
    doc.save(fileName);
};