//
//  KMBookemarkOutlineView.swift
//  PDF Reader Pro
//
//  Created by lizhe on 2024/3/4.
//

import Cocoa

private let kLabelIdentifier = NSUserInterfaceItemIdentifier("Label")
private let kFileIdentifier  = NSUserInterfaceItemIdentifier("File")
private let kPageIdentifier  = NSUserInterfaceItemIdentifier("Page")

class KMBookmarkOutlineView: KMBaseXibView {
    @IBOutlet weak var outlineView: NSOutlineView!
    
    var data: KMRootBookmark? {
        didSet {
            self.reloadData()
        }
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        // Drawing code here.
    }
    
    override func setup() {
        outlineView.delegate = self
        outlineView.dataSource = self
        outlineView.registerForDraggedTypes([kPasteboardTypeBookmarkRows, .fileURL, .string])
        outlineView.doubleAction = #selector(doubleClickBookmark)
    }
    
    override func reloadData() {
        guard let data = data else { return }
        
        self.outlineView.reloadData()
    }
    
}

//MARK: Action
extension KMBookmarkOutlineView {
    @objc func doubleClickBookmark() {
        
    }
}

// MARK: - NSOutlineViewDataSource
extension KMBookmarkOutlineView: NSOutlineViewDataSource {
    func outlineView(_ outlineView: NSOutlineView, numberOfChildrenOfItem item: Any?) -> Int {
        let bookmark = item as? KMBookmark ?? data
        guard let bookmark = bookmark else { return 0}
        return bookmark.bookmarkType == .folder ? bookmark.children.count : 0
    }
    
    func outlineView(_ outlineView: NSOutlineView, isItemExpandable item: Any) -> Bool {
        let bookmark = item as! KMBookmark
        return bookmark.bookmarkType == .folder
    }
    
    func outlineView(_ outlineView: NSOutlineView, child index: Int, ofItem item: Any?) -> Any {
        let bookmark = (item as? KMBookmark) ?? data
        return bookmark?.objectOfChidren(index: index) as Any
    }
}

extension KMBookmarkOutlineView: NSOutlineViewDelegate {
    // MARK: - NSOutlineViewDelegate
    
    func outlineView(_ outlineView: NSOutlineView, viewFor tableColumn: NSTableColumn?, item: Any) -> NSView? {
        guard let column = tableColumn else { return nil }
        guard let item = item as? KMBookmark else { return nil }
        let identifier = column.identifier
        
        var cell: NSTableCellView = NSTableCellView()
        switch identifier {
        case kLabelIdentifier: do {
            cell = KMBookmarkOutlineTitleCellView()
        }
        case kPageIdentifier: do {
            cell = KMBookmarkOutlinePageCellView()
        }
        case kFileIdentifier: do {
            cell = KMBookmarkOutlineFileCellView()
        }
            
        default:
            break
        }
        
        return cell
    }
}