//
//  KMCloudPathControl.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2023/2/14.
//

import Cocoa

typealias KMCloudPathControlItemClick = (Int)->()
class KMCloudPathControl: NSView, NSTableViewDelegate, NSTableViewDataSource {
    var scrollView = NSScrollView()
    var tableView = NSTableView()
    
    var enabled: Bool = true
    
    private var paths: [String] = []
    
    private var myUrl: String?
    var urlString: String? {
        get {
            return self.myUrl
        }
        set {
            self.myUrl = newValue
            self.paths.removeAll()
            let tableColumns = self.tableView.tableColumns
            for tableColumn in tableColumns {
                self.tableView.removeTableColumn(tableColumn)
            }
            
            if (self.myUrl == nil) {
                return
            }
            let paths: [String] = (self.myUrl?.components(separatedBy: "\\"))!
            for path in paths {
                self.addPath(path)
            }
            
            self.tableView.reloadData()
        }
    }
    
    var itemClick: KMCloudPathControlItemClick?
    
    typealias KMCloudPathControlCellItemClick = ()->()
    private class KMCellView: NSTableCellView {
        
        var button = NSButton()
        var cellItemClick: KMCloudPathControlCellItemClick?
        
        override init(frame frameRect: NSRect) {
            super.init(frame: frameRect)
            
            initSubViews()
        }
        
        required init?(coder: NSCoder) {
            super.init(coder: coder)
            
            initSubViews()
        }
        
        public func initSubViews() {
            self.addSubview(self.button)
//            self.label.lineBreakMode = .byTruncatingTail
            self.button.isBordered = false
            self.button.target = self
            self.button.action = #selector(buttonAction)
        }
        
        override func layout() {
            super.layout()
            
            self.button.frame = NSMakeRect(5, 10, NSWidth(self.bounds)-10, 20)
        }
        
        @objc func buttonAction() {
            guard let callback = self.cellItemClick else {
                return
            }
            
            callback()
        }
    }
    
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
        
        initSubViews()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        
        initSubViews()
    }
    
    public func initSubViews() {
        self.addSubview(self.scrollView)
        self.scrollView.documentView = self.tableView
        
        self.tableView.rowHeight = 30
        
        self.tableView.delegate = self
        self.tableView.dataSource = self
        self.tableView.headerView = nil
        
    }
    
    override func layout() {
        super.layout()
        
        self.scrollView.frame = self.bounds
        self.tableView.frame = self.scrollView.bounds
    }
    
    private func addPath(_ path: String) {
        let column = NSTableColumn(identifier: NSUserInterfaceItemIdentifier(rawValue: "column\(self.paths.count)"))
        column.title = "column1"
        column.width = 120+20
        self.tableView.addTableColumn(column)
        self.paths.append(path)
    }
    
    func numberOfRows(in tableView: NSTableView) -> Int {
        return 1
    }
    
    func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
        let view = KMCellView()
        var i: Int = 0
        for path in self.paths {
            if (tableColumn?.identifier.rawValue == "column\(i)") {
                view.button.title = path
                break
            }
            i += 1
        }
        
        view.cellItemClick = { [weak self] in
            guard let callback = self?.itemClick else {
                return
            }
            
            if (self!.enabled == false) {
                return
            }
            
            callback(i)
        }
        
        return view
    }
    
    func tableView(_ tableView: NSTableView, rowViewForRow row: Int) -> NSTableRowView? {
        return NSTableRowView()
    }
}