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

import Cocoa

class KMHomeRightView: BaseXibView {
    
    @IBOutlet var rightScrollView: NSScrollView!
    @IBOutlet var rightCollectionView: NSCollectionView!
    
    var filesHeaderView: KMHomeFilesHeaderView = KMHomeFilesHeaderView()
    
    //MARK: - func
    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.configUI()
    }
    
    override func layout() {
        super.layout()
        
        rightCollectionView.reloadData()
    }
    
    func configUI() {
        
        
        rightScrollView.scrollerStyle = .overlay
        
        rightCollectionView.backgroundColors = [NSColor.clear]
        rightCollectionView.wantsLayer = true
        rightCollectionView.layer?.backgroundColor = NSColor.clear.cgColor
        rightCollectionView.delegate = self
        rightCollectionView.dataSource = self
        rightCollectionView.allowsEmptySelection = true
        
        rightCollectionView.register(KMHistoryFileThumbItem.self, forItemWithIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileThumbItem"))
        rightCollectionView.register(KMHistoryFileListItem.self, forItemWithIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileListItem"))

        
        rightCollectionView.register(KMHomeQuickToolsView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionHeader, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "kmHomeQuickToolsView"))
        rightCollectionView.register(KMHomeFilesHeaderView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionHeader, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "kmHomeFilesHeaderView"))
        
        rightCollectionView.register(KMHomeFilesEmptyHeaderView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionHeader, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHomeFilesEmptyHeaderView"))
        rightCollectionView.register(KMHomeFilesEmptyHeaderView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionFooter, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHomeFilesEmptyHeaderView"))
    }
    
    func reloadData() {
        self.rightCollectionView.reloadData()
        
    }
    
    private func collectionViewSelectedChanged() {
        let indexs = rightCollectionView.selectionIndexPaths
        HistoryFilesManager.manager.selectFiles.removeAll()
        if indexs.count >= 0 {
            for index in indexs {
                let url = HistoryFilesManager.manager.files[index.item]
                HistoryFilesManager.manager.selectFiles.append(url)
            }
        }
        filesHeaderView.updateDeleteButtonState()
    }
    
    
}

//MARK: - NSCollectionViewDelegate, NSCollectionViewDataSource
extension KMHomeRightView: NSCollectionViewDelegate, NSCollectionViewDataSource, NSCollectionViewDelegateFlowLayout {
     
    func numberOfSections(in collectionView: NSCollectionView) -> Int {
        return 2
    }
    
    func collectionView(_ collectionView: NSCollectionView, numberOfItemsInSection section: Int) -> Int {
        if section == 0 {
            return 0
        }
        return HistoryFilesManager.manager.files.count
    }
     
    func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
        if indexPath.item >= HistoryFilesManager.manager.files.count {
            return NSCollectionViewItem()
        }
        
        if HistoryFilesManager.manager.showMode == .Thumbnail {
            let item: KMHistoryFileThumbItem = collectionView.makeItem(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileThumbItem"), for: indexPath) as! KMHistoryFileThumbItem
            
            return item
        } else if HistoryFilesManager.manager.showMode == .List {
            let item: KMHistoryFileListItem = collectionView.makeItem(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileListItem"), for: indexPath) as! KMHistoryFileListItem
            item.fileURL = HistoryFilesManager.manager.files[indexPath.item]
            item.reloadData()
            return item
        }
        return NSCollectionViewItem()
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
        if HistoryFilesManager.manager.showMode == .Thumbnail {
            return CGSize(width: 226, height: 248)
        } else if HistoryFilesManager.manager.showMode == .List {
            let width = collectionView.frame.size.width - 80
            return CGSize(width: width, height: 80)
        }
         
        return CGSize(width: 0.01, height: 0.01)
    }
    
    func collectionView(_ collectionView: NSCollectionView, viewForSupplementaryElementOfKind kind: NSCollectionView.SupplementaryElementKind, at indexPath: IndexPath) -> NSView {
         
        if kind == NSCollectionView.elementKindSectionHeader {
            if indexPath.section == 0 {
                //quick tools
                let view = collectionView.makeSupplementaryView(ofKind: kind, withIdentifier: NSUserInterfaceItemIdentifier("kmHomeQuickToolsView"), for: indexPath) as! KMHomeQuickToolsView
                
                return view
                
            } else if indexPath.section == 1 {
                //Recently
                filesHeaderView = collectionView.makeSupplementaryView(ofKind: kind, withIdentifier: NSUserInterfaceItemIdentifier("kmHomeFilesHeaderView"), for: indexPath) as! KMHomeFilesHeaderView
                filesHeaderView.delegate = self
                
                return filesHeaderView
            }
        } else if kind == NSCollectionView.elementKindSectionFooter {
            let view = collectionView.makeSupplementaryView(ofKind: kind, withIdentifier: NSUserInterfaceItemIdentifier("KMHomeFilesEmptyHeaderView"), for: indexPath) as! KMHomeFilesEmptyHeaderView
            
            return view
        }
        return NSView()
        
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return 8
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return 0.01
    }
    
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> NSSize {
        if section == 0 {
            return NSSize(width: collectionView.frame.size.width, height: 232)
        } else if section == 1 {
            return NSSize(width: collectionView.frame.size.width, height: 28)
        }
        
        return NSSize(width: 0, height: 0.01)
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, referenceSizeForFooterInSection section: Int) -> NSSize {
        if section == 0 {
            return NSSize(width: 0, height: 40)
        }
        return NSSize(width: 0, height: 0.01)
        
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, insetForSectionAt section: Int) -> NSEdgeInsets {
        return NSEdgeInsetsMake(12, 40, 0, 40)
    }
    
    func collectionView(_ collectionView: NSCollectionView, didSelectItemsAt indexPaths: Set<IndexPath>) {
        self.collectionViewSelectedChanged()
        
    }
    
    func collectionView(_ collectionView: NSCollectionView, didDeselectItemsAt indexPaths: Set<IndexPath>) {
        self.collectionViewSelectedChanged()
        
    }
    
}


extension KMHomeRightView: KMHomeFilesHeaderViewDelegate {
    
    func homeFilesShowModeDidUpdate(_ view: KMHomeFilesHeaderView) {
        self.reloadData()
    }
    
    func homeFilesHeaderViewDeleteButtonClicked(_ view: KMHomeFilesHeaderView) {
        
    }
}