//
//  KMPDFAnnotationButtonWidgetSub.swift
//  PDF Reader Pro
//
//  Created by wanjun on 2024/1/31.
//

import Cocoa

class KMPDFAnnotationButtonWidgetSub: CPDFButtonWidgetAnnotation {
    var formType: CAnnotationType = .unkown
    
    override func draw(with box: CPDFDisplayBox, in context: CGContext!) {
        guard shouldDisplay() else {
            return
        }
        
        if controlType() == .checkBoxControl {
            if hasAppearanceStream() {
                super.draw(with: box, in: context)
            } else {
                super.draw(with: box, in: context)

                NSGraphicsContext.saveGraphicsState()
                transformContext(for: page, displayBox: box)
                
                context.setStrokeColor(red: 0, green: 0, blue: 0, alpha: 1.0)
                context.setLineWidth(1.0)
                context.addRect(CGRect(x: bounds.origin.x, y: bounds.origin.y, width: bounds.size.width, height: bounds.size.height))
                context.strokePath()

                NSGraphicsContext.restoreGraphicsState()
            }
        } else if controlType() == .pushButtonControl {
            if hasAppearanceStream() {
                super.draw(with: box, in: context)
            } else {
                NSGraphicsContext.saveGraphicsState()
                let stabilizeHeight: CGFloat = 25
                let actualRect = NSRect(x: bounds.origin.x, y: bounds.minY + (bounds.height - stabilizeHeight) / 2, width: bounds.size.width, height: stabilizeHeight)
                let bezierPath = NSBezierPath(roundedRect: actualRect, xRadius: 2, yRadius: 2)
                NSColor(red: 37/255.0, green: 139/255.0, blue: 251/255.0, alpha: 1).set()
                bezierPath.fill()
                
                var attributes = [NSAttributedString.Key: Any]()
                if let font = self.font {
                    attributes[.font] = font
                }
                if let fontColor = self.fontColor {
                    attributes[.foregroundColor] = fontColor
                }
                
                let stringRect = caption()!.boundingRect(with: CGSize(width: actualRect.size.width, height: actualRect.size.height), options: .usesLineFragmentOrigin, attributes: attributes)
                
                caption().draw(in: CGRect(x: (actualRect.size.width - stringRect.size.width)/2 + actualRect.origin.x,
                                        y: (actualRect.size.height - stringRect.size.height)/2 + actualRect.origin.y,
                                        width: stringRect.size.width, height: stringRect.size.height), withAttributes: attributes)
                
                NSGraphicsContext.restoreGraphicsState()
            }
        } else {
            super.draw(with: box, in: context)
        }
    }
    
    func transformContext(for page: CPDFPage, displayBox box: CPDFDisplayBox) {
        var transform = NSAffineTransform()
        let boxRect = page.bounds(for: box)
        let rotation = page.rotation
        
        // Handle rotation.
        switch rotation {
        case 90:
            transform.rotate(byDegrees: -90)
            transform.translateX(by: -boxRect.size.width, yBy: 0.0)
        case 180:
            transform.rotate(byDegrees: 180)
            transform.translateX(by: -boxRect.size.width, yBy: -boxRect.size.height)
        case 270:
            transform.rotate(byDegrees: 90)
            transform.translateX(by: 0.0, yBy: -boxRect.size.height)
        default:
            break
        }
        
        // Origin.
        transform.translateX(by: -boxRect.origin.x, yBy: -boxRect.origin.y)
        
        // Concatenate.
        transform.concat()
    }

    func keysForValuesToObserveForUndo() -> Set<String> {
        return []
    }
}