//
//  KMImageToolTipContext.swift
//  PDF Master
//
//  Created by tangchao on 2023/11/23.
//

import Foundation

protocol KMImageToolTipContext: NSObjectProtocol {
    func toolTipImage() -> NSImage?
}

extension NSAttributedString: KMImageToolTipContext {
    func toolTipImage() -> NSImage? {
        return nil
    }
}

extension CPDFDestination: KMImageToolTipContext {
    func toolTipImage() -> NSImage? {
        //        static NSDictionary *labelAttributes = nil;
        //        static NSColor *labelColor = nil;
        //        if (labelAttributes == nil)
                let style = NSMutableParagraphStyle()
                style.lineBreakMode = .byClipping
                let labelAttributes: [NSAttributedString.Key : Any] = [.font : NSFont.boldSystemFont(ofSize: 11), .foregroundColor : NSColor.white, .paragraphStyle : style]
        //        if (labelColor == nil)
                let labelColor = NSColor(calibratedWhite: 0.5, alpha: 0.8)
                
        //        PDFPage *page = [self page];
        let page = self.page()
        //        NSImage *pageImage = [page thumbnailWithSize:0.0 forBox:kPDFDisplayBoxCropBox shadowBlurRadius:0.0 readingBar:nil];
        //        NSRect pageImageRect = {NSZeroPoint, [pageImage size]};
        //        NSRect bounds = [page boundsForBox:kPDFDisplayBoxCropBox];
        let bounds = page?.bounds(for: .cropBox) ?? .zero
                var sourceRect: NSRect = .zero
        //        PDFSelection *selection = [page selectionForRect:bounds];
        let selection = page?.selection(for: bounds)
        //        NSAffineTransform *transform = [page affineTransformForBox:kPDFDisplayBoxCropBox];
        let transform = page?.transform()
                
        //        sourceRect.size.width = [[NSUserDefaults standardUserDefaults] doubleForKey:SKToolTipWidthKey];
                sourceRect.size.width = 260
        //        sourceRect.size.height = [[NSUserDefaults standardUserDefaults] doubleForKey:SKToolTipHeightKey];
                sourceRect.size.height = 120
        //        sourceRect.origin = SKAddPoints([transform transformPoint:[self point]], offset);
        sourceRect.origin = self.point
                sourceRect.origin.y -= NSHeight(sourceRect)
                
                
//                if ([selection hasCharacters]) {
//                    NSRect selBounds = [selection boundsForPage:page];
//                    selBounds = SKRectFromPoints([transform transformPoint:SKBottomLeftPoint(selBounds)], [transform transformPoint:SKTopRightPoint(selBounds)]);
//                    CGFloat top = ceil(fmax(NSMaxY(selBounds), NSMinY(selBounds) + NSHeight(sourceRect)));
//                    CGFloat left = floor(fmin(NSMinX(selBounds), NSMaxX(selBounds) - NSWidth(sourceRect)));
//                    if (top < NSMaxY(sourceRect))
//                        sourceRect.origin.y = top - NSHeight(sourceRect);
//                    if (left > NSMinX(sourceRect))
//                        sourceRect.origin.x = left;
//                }
                
//                sourceRect = SKConstrainRect(sourceRect, pageImageRect);
                
//                NSAttributedString *labelString = [[NSAttributedString alloc] initWithString:[NSString stringWithFormat:NSLocalizedString(@"Page %@", @"Tool tip label format"), [page displayLabel]] attributes:labelAttributes];
//                NSRect labelRect = [labelString boundingRectWithSize:NSZeroSize options:NSStringDrawingUsesLineFragmentOrigin];
//
//                labelRect.size.width = floor(NSWidth(labelRect));
//                labelRect.size.height = 2.0 * floor(0.5 * NSHeight(labelRect)); // make sure the cap radius is integral
//                labelRect.origin.x = NSWidth(sourceRect) - NSWidth(labelRect) - 0.5 * NSHeight(labelRect) - TEXT_MARGIN_X;
//                labelRect.origin.y = TEXT_MARGIN_Y;
//                labelRect = NSIntegralRect(labelRect);
//
//                NSImage *image = [NSImage bitmapImageWithSize:sourceRect.size drawingHandler:^(NSRect rect){
//
//                    [pageImage drawInRect:rect fromRect:sourceRect operation:NSCompositeCopy fraction:1.0];
//
//                    CGFloat radius = 0.5 * NSHeight(labelRect);
//                    NSBezierPath *path = [NSBezierPath bezierPath];
//
//                    [path moveToPoint:SKTopLeftPoint(labelRect)];
//                    [path appendBezierPathWithArcWithCenter:NSMakePoint(NSMinX(labelRect), NSMidY(labelRect)) radius:radius startAngle:90.0 endAngle:270.0];
//                    [path appendBezierPathWithArcWithCenter:NSMakePoint(NSMaxX(labelRect), NSMidY(labelRect)) radius:radius startAngle:-90.0 endAngle:90.0];
//                    [path closePath];
//
//                    [labelColor setFill];
//                    [path fill];
//
//                    [labelString drawWithRect:labelRect options:NSStringDrawingUsesLineFragmentOrigin];
//
//                }];
//
//                [labelString release];
        let image = page?.thumbnail(of: sourceRect.size)
                
                return image
//        return nil
    }
}

extension CPDFAnnotation: KMImageToolTipContext {
    func toolTipImage() -> NSImage? {
        return nil
    }
}

extension CPDFPage: KMImageToolTipContext {
    func toolTipImage() -> NSImage? {
        return nil
    }
}