//
//  KMScreenShotMaskViewController.swift
//  PDF Reader Pro
//
//  Created by liujiajie on 2024/1/24.
//

import Cocoa

let keditViewGap = 5

class KMScreenShotMaskViewController: NSViewController{
    @IBOutlet var screenShotMaskView: KMScreenShotMaskView!
    var editViewController: KMScreenShotEditViewController!
    var holeDragImageView: NSImageView!
    var callBack: captureScreenCallBack?

    convenience init(callB: @escaping captureScreenCallBack) {
        self.init(nibName: "KMScreenShotMaskViewController", bundle: nil)
        self.callBack = callB
    }
    
    override func loadView() {
        super.loadView()
        initViews()
        handlerCallBack()
    }
    func initViews() {
        view.wantsLayer = true
        view.layer?.backgroundColor = NSColor.clear.cgColor
        screenShotMaskView.frame = view.frame
        
        editViewController = KMScreenShotEditViewController(nibName: "KMScreenShotEditViewController", bundle: nil)
        view.addSubview(editViewController.view)
        editViewController.view.isHidden = true
        
        holeDragImageView = NSImageView(frame: NSRect(x: 0, y: 0, width: 40, height: 40))
        view.addSubview(holeDragImageView)
        holeDragImageView.isHidden = true
        holeDragImageView.image = NSImage(named: "drag.png")
    }
    func handlerCallBack() {
        self.screenShotMaskView.callBack = self.callBack
        
        self.screenShotMaskView.frameCallBack = {[unowned self] rect in
            if self.editViewController.view.isHidden {
                self.editViewController.view.isHidden = false
            }
            if self.holeDragImageView.isHidden{
                self.holeDragImageView.isHidden = false
            }
            self.editViewController.updateSize(withRect: rect)
            self.updateEditViewFrame(with: rect)
            self.updateHoleButtonPosition(rect)
        }
        
        self.editViewController.buttonCallBack = { [weak self] captureOrNot in
            self!.holeDragImageView.isHidden = true
            if captureOrNot {
                self!.screenShotMaskView.captureImage()
            } else {
                self!.screenShotMaskView.endImageCapture()
            }
        }
        
        self.editViewController.sizeCallBack = { [weak self] size in
            self!.screenShotMaskView.updateholeSize(newSize: size)
            self?.updateHoleButtonPositionWithHoleSize(holeSize: size)
        }
        
        self.screenShotMaskView.detachCallBack = { [weak self] event in
            let cursorPoint = KMScreenShotHandler.screenPosition(for: event)
            self?.screenShotMaskView.holeDragMode = NSPointInRect(cursorPoint, NSMakeRect((self?.screenShotMaskView.borderFrame.origin.x ?? 0) + 4, (self?.screenShotMaskView.borderFrame.origin.y ?? 0) + 4, (self?.screenShotMaskView.borderFrame.size.width ?? 0) - 8, (self?.screenShotMaskView.borderFrame.size.height ?? 0) - 8))
        }
    }
    func beginImageCapture(_ isCaptureWindow: Bool) {
        self.holeDragImageView.isHidden = true
        if isCaptureWindow {
            self.editViewController.view.isHidden = true
        }
        self.screenShotMaskView.beginImageCapture(isCaptureWindow: isCaptureWindow)
    }
    func updateHoleButtonPositionWithHoleSize(holeSize: CGSize) {
        self.holeDragImageView.frame = NSMakeRect(self.screenShotMaskView.borderFrame.origin.x + holeSize.width/2 - self.holeDragImageView.frame.size.width/2, self.screenShotMaskView.borderFrame.origin.y + holeSize.height/2 - self.holeDragImageView.frame.size.height/2, self.holeDragImageView.frame.size.width, self.holeDragImageView.frame.size.height)
    }
    func updateHoleButtonPosition(_ rect: NSRect) {
        self.holeDragImageView.frame = NSMakeRect(NSMidX(rect) - self.holeDragImageView.frame.size.width/2, NSMidY(rect) - self.holeDragImageView.frame.size.height/2, self.holeDragImageView.frame.size.width, self.holeDragImageView.frame.size.height)
    }
    func updateEditViewFrame(with aRect: NSRect) {
        let viewWidth = self.editViewController.view.frame.size.width
        let viewHeight = self.editViewController.view.frame.size.height
        var newRect = NSMakeRect(NSMinX(aRect), NSMinY(aRect) - viewHeight - CGFloat(keditViewGap), viewWidth, viewHeight)
        if NSMinY(newRect) < 0 {
            newRect.origin.x = NSMinX(newRect) - viewWidth - CGFloat(keditViewGap)
            newRect.origin.y = NSMinY(aRect) + CGFloat(keditViewGap)
            if newRect.origin.x < 0 { 
                newRect.origin.x = NSMinX(aRect) + CGFloat(keditViewGap)
            }
        }
        let screenFrame = NSScreen.screens.first!.frame
        if NSMaxX(screenFrame) < NSMaxX(newRect) {
            newRect.origin.x = screenFrame.size.width - viewWidth
        }
        
        if NSMaxY(screenFrame) < NSMaxY(newRect) {
            newRect.origin.y = screenFrame.size.height - viewHeight
        }
        
        self.editViewController.view.frame = newRect
    }
}