//
//  KMDocumentAIPDFView.m
//  PDF Master
//
//  Created by 丁林圭 on 2023/2/2.
//

#import "KMDocumentAIPDFView.h"
#import "NSEvent+PDFListView.h"
#import "NSGeometry+PDFListView.h"
#import "KMDocumentAIPopViewController.h"

#define DOCUMENT_SIZE 30.0

@interface KMDocumentAIPDFView()<NSPopoverDelegate>

//@property(nonatomic,retain) NSMutableArray<COCRResult *> * results;

@property(nonatomic,assign) CGRect drawRecognitionEreaRect;

@property(nonatomic,assign) CGRect recognitionEreaRect;

@property (nonatomic, assign) NSUInteger selectionPageIndex;

//@property (nonatomic, retain) COCRResult * activeResult;

@property (nonatomic, assign) NSInteger activeResultIndex;

@property (nonatomic, retain) CPDFPage * activeResultPage;

@property (nonatomic, retain) NSPopover  *popOver;

@property (nonatomic, retain) KMDocumentAIPopViewController  *documentAIPopViewController;

@end

@implementation KMDocumentAIPDFView

- (NSPopover *)popOver {
    if(!_popOver) {
        _popOver = [[NSPopover alloc] init];
        _popOver.delegate = self;
        self.documentAIPopViewController = [[KMDocumentAIPopViewController alloc] initWithNibName:@"KMDocumentAIPopViewController" bundle:[NSBundle mainBundle]];
        _popOver.contentViewController = self.documentAIPopViewController;
        _popOver.animates = YES;
        __block typeof(self) blockSelf = self;
        self.documentAIPopViewController.callback = ^(NSInteger result) {
            if(result == 1) {
//                blockSelf.results[blockSelf.activeResultIndex].text = blockSelf.documentAIPopViewController.contentTextView.string?:@"";
                [blockSelf setNeedsDisplayAnnotationViewForPage:blockSelf.activeResultPage];
            }
            if(blockSelf.popOver.isShown)
                [blockSelf.popOver performClose:nil];
            
        };
        _popOver.behavior = NSPopoverBehaviorTransient;
    }
    
    return _popOver;
}

- (void)mouseDown:(NSEvent *)event {
//     if ([self doOCRResultWithEvent:event]) {
//        if(self.popOver.isShown) {
//            [self.popOver performClose:nil];
//        } else {
//            CGRect rect = [self convertRect:self.activeResult.textBounds fromPage:self.currentPage];
//            [self.popOver showRelativeToRect:rect ofView:self preferredEdge:NSRectEdgeMinY];
//            self.documentAIPopViewController.contentTextView.string = self.activeResult.text?:@"";
//        }
//    } else if ([self isRecognitionErea]) {
//        [self doSelectWithEvent:event];
//    }
}

//- (COCRResult *)doOCRResultWithEvent:(NSEvent *)theEvent {
//    COCRResult *result = nil;
//    NSPoint point = NSZeroPoint;
//    CPDFPage *page = [self pageAndPoint:&point forEvent:theEvent nearest:YES];
//
//    for (NSInteger i = 0;i<self.results.count;i++) {
//        COCRResult *tResult = self.results[i];
//        if(CGRectContainsPoint(tResult.textBounds, point)){
//            result = tResult;
//            self.activeResultIndex = i;
//            break;
//        }
//    }
//    if(result) {
//        self.activeResult = result;
//        self.activeResultPage = page;
//    } else {
//        self.activeResult = nil;
//        self.activeResultPage = nil;
//        self.activeResultIndex = -1;
//    }
//
//    return result;
//}

- (void)mouseMoved:(NSEvent *)event {
}

- (void)keyDown:(NSEvent *)event {
    
}

- (void)mouseExited:(NSEvent *)event {
}

- (NSRect)recognitionRect {
    return self.recognitionEreaRect;
}

- (void)clearOCRResult {
    self.resultDics = @[].mutableCopy;
    [self setNeedsDisplayAnnotationViewForPage:self.currentPage];
}


- (void)doSelectWithEvent:(NSEvent *)theEvent {
    NSPoint initialPoint = NSZeroPoint;
    CPDFPage *page = [self pageAndPoint:&initialPoint forEvent:theEvent nearest:NO];
    
    CGFloat margin = DOCUMENT_SIZE / [self scaleFactor];
    
    self.selectionPageIndex = [page pageIndex];
    BOOL didSelect = (NO == NSIsEmptyRect(self.recognitionEreaRect));
    
    CRectEdges resizeHandle = didSelect ? CPDFListViewResizeHandleForPointFromRect(initialPoint, self.recognitionEreaRect, margin) : 0;
    
    if (resizeHandle == 0 && (didSelect == NO || NSPointInRect(initialPoint, self.recognitionEreaRect) == NO)) {
        self.recognitionEreaRect = CGRectMake(initialPoint.x, initialPoint.y, 0, 0);
        resizeHandle = CMaxXEdgeMask | CMinYEdgeMask;
        if (didSelect)
            [self setNeedsDisplay:YES];
    }
    
    NSRect initialRect = self.recognitionEreaRect;
    NSRect pageBounds = [page boundsForBox:[self displayBox]];
    CRectEdges newEffectiveResizeHandle, effectiveResizeHandle = resizeHandle;
    
    [self setCursorForAreaOfInterest:CAreaOfInterestForResizeHandle(resizeHandle, page)];
    CGFloat mouseOffset = NSWidth([self convertRect:NSMakeRect(0.0, 0.0, 1.0, 1.0) toPage:page]);

    while (YES) {
        theEvent = [[self window] nextEventMatchingMask: NSEventMaskLeftMouseUp | NSEventMaskLeftMouseDragged];
        if ([theEvent type] == NSEventTypeLeftMouseUp) {
            if (!NSIsEmptyRect(self.recognitionEreaRect)) {
                [NSMenu popUpContextMenu:[self menuForEvent:theEvent] withEvent:theEvent forView:self];
            }
            break;
        }
        
        CGPoint zPoint = initialPoint;
        [self pageAndPoint:&zPoint forEvent:theEvent nearest:YES];
        CGRect zRect = CGRectMake(initialPoint.x-2*mouseOffset, initialPoint.y-2*mouseOffset, 4*mouseOffset, 4*mouseOffset);
        if (CGRectContainsPoint(zRect, zPoint)) {continue;}
        
        NSPoint newPoint = CGPointZero;
        NSRect  newRect = initialRect;
        NSPoint delta = CGPointZero;
        
        newPoint = [self convertPoint:[theEvent locationInPDFListView:self] toPage:page];
        delta = CPDFListViewSubstractPoints(newPoint, initialPoint);
        
        if (resizeHandle) {
            newEffectiveResizeHandle = 0;
            if ((resizeHandle & CMaxXEdgeMask))
                newEffectiveResizeHandle |= newPoint.x < NSMinX(initialRect) ? CMinXEdgeMask : CMaxXEdgeMask;
            else if ((resizeHandle & CMinXEdgeMask))
                newEffectiveResizeHandle |= newPoint.x > NSMaxX(initialRect) ? CMaxXEdgeMask : CMinXEdgeMask;
            if ((resizeHandle & CMaxYEdgeMask))
                newEffectiveResizeHandle |= newPoint.y < NSMinY(initialRect) ? CMinYEdgeMask : CMaxYEdgeMask;
            else if ((resizeHandle & CMinYEdgeMask))
                newEffectiveResizeHandle |= newPoint.y > NSMaxY(initialRect) ? CMaxYEdgeMask : CMinYEdgeMask;
            if (newEffectiveResizeHandle != effectiveResizeHandle) {
                effectiveResizeHandle = newEffectiveResizeHandle;
                [self setCursorForAreaOfInterest:CAreaOfInterestForResizeHandle(effectiveResizeHandle, page)];
            }
        }
        
        if (resizeHandle == CEditInEdgeMask) {
            newRect.origin = CPDFListViewAddPoints(newRect.origin, delta);
        } else if (([theEvent modifierFlags] & NSEventModifierFlagShift)) {
            CGFloat width = NSWidth(newRect);
            CGFloat height = NSHeight(newRect);
            CGFloat square;
            
            if ((resizeHandle & CMaxXEdgeMask))
                width += delta.x;
            else if ((resizeHandle & CMinXEdgeMask))
                width -= delta.x;
            if ((resizeHandle & CMaxYEdgeMask))
                height += delta.y;
            else if ((resizeHandle & CMinYEdgeMask))
                height -= delta.y;
            
            if (0 == (resizeHandle & (CMinXEdgeMask | CMaxXEdgeMask)))
                square = fabs(height);
            else if (0 == (resizeHandle & (CMinYEdgeMask | CMaxYEdgeMask)))
                square = fabs(width);
            else
                square = fmax(fabs(width), fabs(height));
            
            if ((resizeHandle & CMinXEdgeMask)) {
                if (width >= 0.0 && NSMaxX(newRect) - square < NSMinX(pageBounds))
                    square = NSMaxX(newRect) - NSMinX(pageBounds);
                else if (width < 0.0 && NSMaxX(newRect) + square > NSMaxX(pageBounds))
                    square =  NSMaxX(pageBounds) - NSMaxX(newRect);
            } else {
                if (width >= 0.0 && NSMinX(newRect) + square > NSMaxX(pageBounds))
                    square = NSMaxX(pageBounds) - NSMinX(newRect);
                else if (width < 0.0 && NSMinX(newRect) - square < NSMinX(pageBounds))
                    square = NSMinX(newRect) - NSMinX(pageBounds);
            }
            if ((resizeHandle & CMinYEdgeMask)) {
                if (height >= 0.0 && NSMaxY(newRect) - square < NSMinY(pageBounds))
                    square = NSMaxY(newRect) - NSMinY(pageBounds);
                else if (height < 0.0 && NSMaxY(newRect) + square > NSMaxY(pageBounds))
                    square = NSMaxY(pageBounds) - NSMaxY(newRect);
            } else {
                if (height >= 0.0 && NSMinY(newRect) + square > NSMaxY(pageBounds))
                    square = NSMaxY(pageBounds) - NSMinY(newRect);
                if (height < 0.0 && NSMinY(newRect) - square < NSMinY(pageBounds))
                    square = NSMinY(newRect) - NSMinY(pageBounds);
            }
            
            if ((resizeHandle & CMinXEdgeMask))
                newRect.origin.x = width < 0.0 ? NSMaxX(newRect) : NSMaxX(newRect) - square;
            else if (width < 0.0 && (resizeHandle & CMaxXEdgeMask))
                newRect.origin.x = NSMinX(newRect) - square;
            if ((resizeHandle & CMinYEdgeMask))
                newRect.origin.y = height < 0.0 ? NSMaxY(newRect) : NSMaxY(newRect) - square;
            else if (height < 0.0 && (resizeHandle & CMaxYEdgeMask))
                newRect.origin.y = NSMinY(newRect) - square;
            newRect.size.width = newRect.size.height = square;
        } else {
            if ((resizeHandle & CMaxXEdgeMask)) {
                newRect.size.width += delta.x;
                if (NSWidth(newRect) < 0.0) {
                    newRect.size.width *= -1.0;
                    newRect.origin.x -= NSWidth(newRect);
                }
            } else if ((resizeHandle & CMinXEdgeMask)) {
                newRect.origin.x += delta.x;
                newRect.size.width -= delta.x;
                if (NSWidth(newRect) < 0.0) {
                    newRect.size.width *= -1.0;
                    newRect.origin.x -= NSWidth(newRect);
                }
            }
            
            if ((resizeHandle & CMaxYEdgeMask)) {
                newRect.size.height += delta.y;
                if (NSHeight(newRect) < 0.0) {
                    newRect.size.height *= -1.0;
                    newRect.origin.y -= NSHeight(newRect);
                }
            } else if ((resizeHandle & CMinYEdgeMask)) {
                newRect.origin.y += delta.y;
                newRect.size.height -= delta.y;
                if (NSHeight(newRect) < 0.0) {
                    newRect.size.height *= -1.0;
                    newRect.origin.y -= NSHeight(newRect);
                }
            }
        }
        
        newRect = CPDFListViewIntersectionRect(newRect, pageBounds);
        if (didSelect) {
            NSRect dirtyRect = NSUnionRect(NSInsetRect(self.recognitionEreaRect, -margin, -margin), NSInsetRect(newRect, -margin, -margin));
            [self setNeedsDisplayAnnotationInRect:dirtyRect];
        } else {
            [self setNeedsDisplayAnnotationViewForVisiblePages];
            didSelect = YES;
        }
        @synchronized (self) {
            self.recognitionEreaRect = newRect;
        }
    }
    
    if (NSIsEmptyRect(self.recognitionEreaRect)) {
        @synchronized (self) {
            self.recognitionEreaRect = NSZeroRect;
            self.selectionPageIndex = NSNotFound;
        }
        
        [self setNeedsDisplay:YES];
    } else if (resizeHandle) {
        [self setNeedsDisplayAnnotationInRect:NSInsetRect(self.recognitionEreaRect, -margin, -margin)];
    }
}

- (CPDFPage *)pageAndPoint:(NSPoint *)point forEvent:(NSEvent *)event nearest:(BOOL)nearest {
    NSPoint p = [event locationInPDFListView:self];
    CPDFPage *page = [self pageForPoint:p nearest:nearest];
    if (page && point)
        *point = [self convertPoint:p toPage:page];
    return page;
}

//- (void)updateResult:(NSArray<COCRResult *> *)results recognitionRect:(CGRect)recognitionRect {
//    self.results = [NSMutableArray arrayWithArray:results];
//    self.drawRecognitionEreaRect = recognitionRect;
//    [self setNeedsDisplayAnnotationViewForPage:self.currentPage];
//}
//
//- (void)drawPage:(CPDFPage *)page toContext:(CGContextRef)context {
//    if(self.resultDics.count > 0) {
//        NSInteger currentIndex = [self.document indexForPage:page];
//        NSArray<COCRResult *> *currentResults = @[];
//        for (NSDictionary *dic in self.resultDics) {
//            if(dic[@"page"] && [dic[@"page"] integerValue] == currentIndex) {
//                if(dic[@"results"]) {
//                    currentResults = dic[@"results"];
//                    break;
//                }
//            }
//        }
//        if (currentResults.count>0) {
//            [NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithCGContext:context flipped:NO]];
//
//            CGContextSaveGState(context);
//            CGContextAddRect(context, self.drawRecognitionEreaRect);
//            CGContextSetRGBFillColor(context, 1, 1, 1, 0.7);
//            CGContextFillPath(context);
//            CGContextRestoreGState(context);
//
//            NSMutableDictionary *dic = [NSMutableDictionary dictionary];
//            [dic setValue:[NSColor blackColor] forKey:NSForegroundColorAttributeName];
//
//            for (COCRResult * cOcrResult in currentResults) {
//                CGContextSaveGState(context);
//
//                CGRect rect =  cOcrResult.textBounds;
//
//                NSString *strChar = cOcrResult.text;
//                CGFloat fontsize = 1.0;
//                NSFont *font = [NSFont systemFontOfSize:fontsize];
//                CGSize strSize = [strChar sizeWithAttributes:@{NSFontAttributeName:font}];
//                while ((fontsize<127) && !(strSize.width>=cOcrResult.textBounds.size.width || strSize.height>=cOcrResult.textBounds.size.height)) {
//                    fontsize += 1.0;
//                    font = [NSFont systemFontOfSize:fontsize];
//                    strSize = [strChar sizeWithAttributes:@{NSFontAttributeName:font}];
//                }
//                NSFont *drawFont = [NSFont systemFontOfSize:fontsize-1];
//
//                strSize = [strChar sizeWithAttributes:@{NSFontAttributeName:drawFont}];
//                CGFloat k =  (cOcrResult.textBounds.size.width - strSize.width)/(strChar.length);
//
//                NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
//
//                NSDictionary *attriDict = @{NSParagraphStyleAttributeName:style,NSKernAttributeName:@(k),NSFontAttributeName:drawFont};
//
//                NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:strChar attributes:attriDict];
//                [attributeString drawInRect:rect];
//
//                CGContextAddRect(context, rect);
//                CGContextSetLineWidth(context, 1.0);
//                CGContextSetStrokeColorWithColor(context, [NSColor colorWithRed:0/255.0 green:0/255.0 blue:0/255.0 alpha:1.0].CGColor);
//                CGContextStrokePath(context);
//
//                CGContextRestoreGState(context);
//            }
//        }
//
//    }
//
//    if(!CGRectEqualToRect(self.recognitionEreaRect, CGRectZero)) {
//        @synchronized (self) {
//            CGContextSaveGState(context);
//
//            CGFloat size = DOCUMENT_SIZE;
//            CGContextSetLineWidth(context, 5.0);
//            CGContextSetStrokeColorWithColor(context, [NSColor colorWithRed:23.0/255.0 green:112.0/255.0 blue:244.0/255.0 alpha:1.0].CGColor);
//
//            CGContextMoveToPoint(context, CGRectGetMidX(self.recognitionEreaRect)-size/2, CGRectGetMaxY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMidX(self.recognitionEreaRect)+size/2, CGRectGetMaxY(self.recognitionEreaRect));
//
//            CGContextMoveToPoint(context, CGRectGetMidX(self.recognitionEreaRect)-size/2, CGRectGetMinY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMidX(self.recognitionEreaRect)+size/2, CGRectGetMinY(self.recognitionEreaRect));
//
//            CGContextMoveToPoint(context, CGRectGetMinX(self.recognitionEreaRect), CGRectGetMidY(self.recognitionEreaRect)-size/2);
//            CGContextAddLineToPoint(context, CGRectGetMinX(self.recognitionEreaRect), CGRectGetMidY(self.recognitionEreaRect)+size/2);
//
//            CGContextMoveToPoint(context, CGRectGetMaxX(self.recognitionEreaRect), CGRectGetMidY(self.recognitionEreaRect)-size/2);
//            CGContextAddLineToPoint(context, CGRectGetMaxX(self.recognitionEreaRect), CGRectGetMidY(self.recognitionEreaRect)+size/2);
//
//            CGContextMoveToPoint(context, CGRectGetMaxX(self.recognitionEreaRect)-size/2, CGRectGetMinY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMaxX(self.recognitionEreaRect), CGRectGetMinY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMaxX(self.recognitionEreaRect), CGRectGetMinY(self.recognitionEreaRect)+ size/2);
//
//            CGContextMoveToPoint(context, CGRectGetMinX(self.recognitionEreaRect)+size/2, CGRectGetMinY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMinX(self.recognitionEreaRect), CGRectGetMinY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMinX(self.recognitionEreaRect), CGRectGetMinY(self.recognitionEreaRect)+ size/2);
//
//            CGContextMoveToPoint(context, CGRectGetMinX(self.recognitionEreaRect)+size/2, CGRectGetMaxY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMinX(self.recognitionEreaRect), CGRectGetMaxY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMinX(self.recognitionEreaRect), CGRectGetMaxY(self.recognitionEreaRect) - size/2);
//
//            CGContextMoveToPoint(context, CGRectGetMaxX(self.recognitionEreaRect)-size/2, CGRectGetMaxY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMaxX(self.recognitionEreaRect), CGRectGetMaxY(self.recognitionEreaRect));
//            CGContextAddLineToPoint(context, CGRectGetMaxX(self.recognitionEreaRect), CGRectGetMaxY(self.recognitionEreaRect) - size/2);
//
//            CGContextStrokePath(context);
//
//            CGContextSetLineCap(context, kCGLineCapRound);
//            CGContextSetLineWidth(context, 2.0);
//            CGContextRestoreGState(context);
//
//            CGContextSetStrokeColorWithColor(context, [NSColor colorWithRed:23.0/255.0 green:112.0/255.0 blue:244.0/255.0 alpha:1.0].CGColor);
//            CGContextBeginPath(context);
//            CGContextMoveToPoint(context, self.recognitionEreaRect.origin.x, self.recognitionEreaRect.origin.y);
//            CGContextAddLineToPoint(context, self.recognitionEreaRect.origin.x+ self.recognitionEreaRect.size.width,self.recognitionEreaRect.origin.y);
//            CGContextAddLineToPoint(context, self.recognitionEreaRect.origin.x + self.recognitionEreaRect.size.width,self.recognitionEreaRect.origin.y + + self.recognitionEreaRect.size.height);
//            CGContextAddLineToPoint(context, self.recognitionEreaRect.origin.x,self.recognitionEreaRect.origin.y + + self.recognitionEreaRect.size.height);
//            CGContextClosePath(context);
//            CGFloat lengths[] = {10,5};
//            CGContextSetLineDash(context, 0, lengths,2);
//            CGContextStrokePath(context);
//        }
//    }
//}

#pragma Mark - menuForEvent

-(NSMenu *)menuForEvent:(NSEvent *)event {
    NSMenu *menu = [[NSMenu alloc]init];
    if(self.isRecognitionErea && !NSEqualRects(NSZeroRect, self.recognitionEreaRect)) {
        NSMenuItem * sureMenuItem = [[NSMenuItem alloc] initWithTitle:NSLocalizedString(@"Start OCR text recognition", nil) action:@selector(menuItemClick_StartOCR:) keyEquivalent:@""];
        [menu addItem:sureMenuItem];
    }

    return menu;
}

-(void)menuItemClick_StartOCR:(NSMenuItem *)item {
    if (self.callback) {
        self.callback(self.recognitionEreaRect,self.currentPage);
    }
    
    self.recognitionEreaRect = CGRectZero;
    [self setNeedsDisplayAnnotationViewForPage:self.currentPage];
}

@end