//
//  KMLinkPageView.swift
//  PDF Reader Pro
//
//  Created by Niehaoyu on 2024/10/18.
//

import Cocoa
import KMComponentLibrary

@objc public protocol KMLinkPageViewDelegate: AnyObject {
    
    @objc optional func kmLinkPageViewDidGoToPage(_ view: KMLinkPageView, _ pageIndex: Int)
    
    @objc optional func kmLinkPageViewDidChangeDestination(_ view: KMLinkPageView, _ pageIndex: Int)
 
}
 
public class KMLinkPageView: BaseXibView {

    @IBOutlet var infoContendView: NSView!
    @IBOutlet var imageBGView: NSView!
    @IBOutlet var pageImage: NSImageView!
    
    @IBOutlet var paginationView: ComponentPagination!
    
    @IBOutlet var goButton: ComponentButton!
    
    var pdfView: CPDFView? = nil
    
    var annotation: CPDFLinkAnnotation? = nil
    
    var startPageIndex: Int = 0
    var choosedIndex: Int = 0
    var isGo: Bool = false

    weak open var delegate: KMLinkPageViewDelegate?

    //MARK: - func
    public override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        
        // Drawing code here.
    }
    
    public required init?(coder decoder: NSCoder) {
        super.init(coder: decoder)
        
    }
    
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
    }
    
    public override func awakeFromNib() {
        super.awakeFromNib()
        
        self.setUpUI()
    }
    
    
    
    func setUpUI() {
        infoContendView.wantsLayer = true
        if let value = ComponentLibrary.shared.getComponentValueFromKey("radius/m") {
            let currentValue = value as! CGFloat
            infoContendView.layer?.cornerRadius = currentValue
        }
        infoContendView.layer?.borderWidth = 1
        infoContendView.layer?.borderColor = ComponentLibrary.shared.getComponentColorFromKey("colorBorder/4").cgColor
        infoContendView.layer?.backgroundColor = ComponentLibrary.shared.getComponentColorFromKey("colorFill/4").cgColor
        infoContendView.layer?.masksToBounds = true
        
        imageBGView.wantsLayer = true
        if let value = ComponentLibrary.shared.getComponentValueFromKey("comp-field/radius") {
            let currentValue = value as! CGFloat
            imageBGView.layer?.cornerRadius = currentValue
        }
        imageBGView.layer?.borderWidth = 1
        imageBGView.layer?.borderColor = ComponentLibrary.shared.getComponentColorFromKey("colorBorder/4").cgColor
        imageBGView.layer?.backgroundColor = ComponentLibrary.shared.getComponentColorFromKey("colorFill/4").cgColor
        imageBGView.layer?.masksToBounds = true
         
        paginationView.properties = ComponentPaginationProperty(doubleArrow_show: false, currentIndex: 0, totalCount: 1)
        paginationView.delegate = self
        
        goButton.properties = ComponentButtonProperty(type: .default_tertiary,
                                                           size: .s,
                                                           buttonText: KMLocalizedString("Go"))
        goButton.setTarget(self, action: #selector(buttonClicked(_:)))
    }
    
    
    func reloadData() {
        guard let pdfView = self.pdfView else {
            return
        }
        
        paginationView.properties.currentIndex = pdfView.currentPageIndex + 1
        if let destination = annotation?.destination() {
            if let page = destination.page() {
                let pageIndex = page.document?.index(for: page) ?? 0
                paginationView.properties.currentIndex = Int((pageIndex + 1))
            }
        }
        
        paginationView.properties.totalCount = Int(pdfView.document.pageCount)
        paginationView.reloadData()
        
        isGo = false
        goButton.properties.buttonText = KMLocalizedString("Go")
        
        choosedIndex = paginationView.properties.currentIndex
        startPageIndex = paginationView.properties.currentIndex
        
    }
    
    func refreshGoButton() {
        if isGo {
            goButton.properties.buttonText = KMLocalizedString("Back")
        } else {
            goButton.properties.buttonText = KMLocalizedString("Go")
        }
        goButton.reloadData()
        
    }
    
    @objc func buttonClicked(_ sender: NSView) {
        if isGo == false {
            delegate?.kmLinkPageViewDidChangeDestination?(self, choosedIndex)
            isGo = true
        } else {
            delegate?.kmLinkPageViewDidGoToPage?(self, startPageIndex)
            isGo = false
        }
        refreshGoButton()
        
    }
    
    
    //MARK: - MouseEvent
    public override func mouseDown(with event: NSEvent) {
        super.mouseDown(with: event)
        
        window?.makeFirstResponder(nil)
    }
    
}

//MARK: - ComponentPaginationDelegate
extension KMLinkPageView: ComponentPaginationDelegate {
    public func componentPaginationDidValueChanged(pagination: ComponentPagination) {
        if choosedIndex != pagination.properties.currentIndex {
            choosedIndex = pagination.properties.currentIndex
            
            isGo = false
            
            refreshGoButton()
        }
    }
}