//
//  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")
private let kSeparatorIdentifier  = NSUserInterfaceItemIdentifier("Separator")

typealias KMBookmarkOutlineViewDoubleClickAction = (_ view: KMBookmarkOutlineView) -> Void
class KMBookmarkOutlineView: BaseXibView {
    @IBOutlet weak var labelColumn: NSTableColumn!
    @IBOutlet weak var fileColumn: NSTableColumn!
    @IBOutlet weak var pageColumn: NSTableColumn!
    
    @IBOutlet weak var outlineView: NSOutlineView!
    
    var doubleClickAction: KMBookmarkOutlineViewDoubleClickAction?
    
    var data: KMRootBookmark? {
        didSet {
            self.reloadData()
        }
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        // Drawing code here.
    }
    
    func setup() {
        outlineView.delegate = self
        outlineView.dataSource = self
        outlineView.registerForDraggedTypes([kPasteboardTypeBookmarkRows, .fileURL, .string])
        outlineView.doubleAction = #selector(doubleClickBookmark)
        
        labelColumn.title = NSLocalizedString("Label", comment: "")
        fileColumn.title = NSLocalizedString("File", comment: "")
        pageColumn.title = NSLocalizedString("Page", comment: "")
    }
    
    func reloadData() {
        guard let data = data else { return }
        
        self.outlineView.reloadData()
    }
    
}

//MARK: Action
extension KMBookmarkOutlineView {
    @objc func doubleClickBookmark() {
        print("doubleClickBookmark")
        self.doubleClickAction?(self)
    }
}

// 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()
        if item.bookmarkType == .separator {
            cell = KMBookmarkOutlineSeparatorCellView()
        } else {
            switch identifier {
            case kLabelIdentifier: do {
                cell = KMBookmarkOutlineTitleCellView()
                let cell = cell as! KMBookmarkOutlineTitleCellView
                cell.titleLabel.stringValue = item.label
                cell.iconImageView.image = item.icon
            }
            case kPageIdentifier: do {
                cell = KMBookmarkOutlinePageCellView()
                let cell = cell as! KMBookmarkOutlinePageCellView
                cell.titleLabel.stringValue = item.pageIndex.description
            }
            case kFileIdentifier: do {
                cell = KMBookmarkOutlineFileCellView()
                let cell = cell as! KMBookmarkOutlineFileCellView
                var stringValue = ""
                if item.bookmarkType == .folder ||
                    item.bookmarkType == .session {
                    let count = item.children.count
                    stringValue = count == 1 ? NSLocalizedString("1 item", comment: "Bookmark folder description") : String.localizedStringWithFormat(NSLocalizedString("%ld items", comment: "Bookmark folder description"), count)
                } else {
                    stringValue = item.fileURL?.path ?? ""
                }
                cell.titleLabel.stringValue = stringValue
                
            }
            default:
                break
            }
        }
        
        return cell
    }
    
    func outlineView(_ outlineView: NSOutlineView, rowViewForItem item: Any) -> NSTableRowView? {
        // 创建一个自定义的行视图
        let rowView = KMBookmarkOutlineRowView()
        guard let item = item as? KMBookmark else { return rowView }
        // 根据需要设置行视图的背景颜色
        if  item.bookmarkType == .separator{
            rowView.hiddenLineView(isHidden: false)
        } else {
            rowView.hiddenLineView()
        }
        return rowView
    }

}