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

import Foundation
 
public enum HistoryFileShowMode : Int {
    case Thumbnail = 0
    case List
}

class HistoryFilesManager: NSObject {

    @objc public static let manager = HistoryFilesManager()
    
    var showMode: HistoryFileShowMode = .Thumbnail {
        didSet {
            UserDefaults.standard.setValue(showMode.rawValue, forKey: "HistoryFileShowModeKey")
            UserDefaults.standard.synchronize()
        }
    }//显示模式
    
    var files: [URL] = [] //列表文件
    
    var selectFiles: [URL] = [] //选中的列表文件
    
    override init() {
        super.init()
        
        self.refreshHistoryFile()
        if UserDefaults.standard.object(forKey: "SetHistoryFileShowModeKey") == nil {
            self.showMode = .Thumbnail
            UserDefaults.standard.setValue("show", forKey: "SetHistoryFileShowModeKey")
            UserDefaults.standard.synchronize()
        } else {
            self.showMode = HistoryFileShowMode(rawValue: UserDefaults.standard.integer(forKey: "HistoryFileShowModeKey"))!
        }
        
    }
    
    func refreshHistoryFile() -> Void {
        files.removeAll()
        for url in NSDocumentController.shared.recentDocumentURLs {
            if FileManager.default.fileExists(atPath: url.path) {
                files.append(url)
            }
        }
        let fileNumber = SettingsManager.sharedInstance.fileListCount
        if fileNumber <= files.count {
            let arr1 = files.prefix(fileNumber)
            files = Array(arr1)
        }
    }
    
    func historyFileDeleteAction(_ indexPaths: [URL]) -> Void {
        let urls: Array<URL> = NSDocumentController.shared.recentDocumentURLs
        NSDocumentController.shared.clearRecentDocuments(nil)
        for (_, url) in urls.enumerated() {
            if !indexPaths.contains(url) {
                NSDocumentController.shared.noteNewRecentDocumentURL(url)
            }
        }
        refreshHistoryFile()
        
    }
}