//
//  KMMergeCollectionViewItem.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2022/11/23.
//

import Cocoa
import PDFKit

typealias KMMergeCollectionViewItemDoubleClick = (_ viewItem: AnyObject)->()
typealias KMMergeCollectionViewItemPageRangeClick = (_ viewItem: AnyObject)->()
class KMMergeCollectionViewItem: NSCollectionViewItem {

    lazy var iconImageView = NSImageView()
    lazy var backgroundView = NSView()
    lazy var selectedView = NSView()
    lazy var pageView = KMPDFThumbnialPageView()
    
    private var expandButton = NSButton()
    private var pageRangeButton = NSButton()
    
    lazy var nameLabel = NSTextField(labelWithString: "")
    
    var doubleClick: KMMergeCollectionViewItemDoubleClick!
    var pageRangeClick: KMMergeCollectionViewItemPageRangeClick!
    
    private var myModel: KMMergeFileModel!
    var model: KMMergeFileModel {
        get {
            myModel
        }
        set {
            myModel = newValue
            
            pageView.page = newValue.page;
            nameLabel.stringValue = model.documentURL.lastPathComponent.components(separatedBy: ".").first!
            if newValue.pageRange == .custom {
                pageRangeButton.title = model.pageRangeString
            } else {
                pageRangeButton.title = (newValue.pageRange).rawValue
            }
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        view.addSubview(backgroundView)
        view.addSubview(selectedView)
        view.addSubview(pageView)
        view.addSubview(expandButton)
        view.addSubview(pageRangeButton)
        view.addSubview(nameLabel)
        
        selectedView.wantsLayer = true
        selectedView.layer?.backgroundColor = NSColor.white.cgColor
        selectedView.layer?.borderWidth = 1
        selectedView.layer?.borderColor = NSColor.white.cgColor
        selectedView.layer?.cornerRadius = 8
        nameLabel.alignment = .center
        nameLabel.lineBreakMode = .byTruncatingTail
        
        expandButton.wantsLayer = true
        expandButton.isBordered = false
        expandButton.title = NSLocalizedString("Expand", comment: "")
        expandButton.layer?.backgroundColor = NSColor.white.cgColor;
        expandButton.target = self
        expandButton.action = #selector(expandButtonAction)
        
        pageRangeButton.wantsLayer = true
        pageRangeButton.isBordered = false
        pageRangeButton.layer?.backgroundColor = NSColor.lightGray.cgColor
        pageRangeButton.target = self
        pageRangeButton.action = #selector(pageRangeButtonAction)
        
        let clickGestureRecongnizer = NSClickGestureRecognizer()
        clickGestureRecongnizer.numberOfClicksRequired = 2
//        view.addGestureRecognizer(clickGestureRecongnizer)
        clickGestureRecongnizer.target = self
        clickGestureRecongnizer.action = #selector(clickGestureRecongnizerAction)
    }
    
    override func viewDidLayout() {
        super.viewDidLayout()
        
        let width = NSWidth(view.bounds)
        let height = NSHeight(view.bounds)
        
        iconImageView.frame = view.bounds
        backgroundView.frame = view.bounds
        
        let flodSize: CGFloat = 28
        expandButton.frame = NSMakeRect(width-flodSize-10, height-flodSize-10, flodSize, flodSize)
        
        pageRangeButton.frame = NSMakeRect(15, 10+20+10, width-30, 28)
        
        selectedView.frame = NSMakeRect(15, 20, width-30, height-20)
        
        nameLabel.frame = NSMakeRect(0, 0, width, 20)
        
        let border: CGFloat = 10
        var bounds: NSRect = NSZeroRect
        if (myModel != nil) {
            bounds = myModel.page.bounds
        }
        
        if (bounds.size.width == 0) {
            return
        }
        
        if (bounds.size.height == 0) {
            return
        }
        
        var pageSelectionSize = CGSize(width: self.view.frame.size.width-30, height: self.view.frame.size.height-40)
//        pageSelectionSize.height -= 40
        var size = NSMakeSize(pageSelectionSize.width - 2 * border, pageSelectionSize.height - 2 * border)
        let minScale = min(size.width/bounds.size.width, size.height/bounds.size.height)
        size.width = bounds.size.width * minScale
        size.height = bounds.size.height * minScale
        
        let pageViewX = (pageSelectionSize.width-size.width) * 0.5 + 15
        let pageViewY = (pageSelectionSize.height-size.height) * 0.5 + 20
        pageView.frame = NSMakeRect(pageViewX, pageViewY, size.width, size.height)
    }
    
    override var isSelected: Bool {
        get {
            super.isSelected
        }
        set {
            super.isSelected = newValue
            
            backgroundView.wantsLayer = true
            if newValue {
//                backgroundView.layer?.backgroundColor = NSColor.blue.cgColor
                selectedView.layer?.borderColor = NSColor.blue.cgColor
            } else {
//                backgroundView.layer?.backgroundColor = NSColor.clear.cgColor
                selectedView.layer?.borderColor = NSColor.white.cgColor
            }
        }
    }
    
    override func mouseDown(with event: NSEvent) {
        if event.clickCount == 2 {
            guard let callback = doubleClick else {
                return
            }
            callback(self)
        } else {
            super.mouseDown(with: event)
        }
    }
    
    @objc func clickGestureRecongnizerAction() {
        
    }
    
    @objc func expandButtonAction() {
        guard let callback = doubleClick else {
            return
        }
        callback(self)
    }
    
    @objc func pageRangeButtonAction() {
        guard let callback = pageRangeClick else {
            return
        }
        callback(self)
    }
}