//
//  KMSignatureManager.swift
//  PDF Reader Pro
//
//  Created by lizhe on 2023/10/9.
//

import Foundation

@objcMembers class KMSignatureManager: NSObject {
    
    static let manager = KMSignatureManager()
    
    var signatureList: [KMSignature] = []
    
    override init() {
        super.init()
        
        signatureList = []
        
        loadAllSignatureList()
    }
    
    @objc func loadAllSignatureList() {
        signatureList.removeAll()
        if let fileDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
            let newFilePath = fileDirectory.appendingPathComponent("NewSignatureList")
            if FileManager.default.fileExists(atPath: newFilePath.path) {
                // 使用 New 的数据
            } else { // 第一次加载 或 未存 New 的数据
                let filePath = fileDirectory.appendingPathComponent("SignatureList")
                if FileManager.default.fileExists(atPath: filePath.path) {
                    NSKeyedUnarchiver.setClass(KMSignature.self, forClassName: "KMSignature")
                    if let array = NSKeyedUnarchiver.unarchiveObject(withFile: filePath.path) as? [KMSignature] {
                        for model in array {
                            signatureList.append(model)
                        }
                    }
                }
            }
        }
        
        if let fileDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
            let filePath = fileDirectory.appendingPathComponent("NewSignatureList")
            if FileManager.default.fileExists(atPath: filePath.path) {
                if let array = NSKeyedUnarchiver.unarchiveObject(withFile: filePath.path) as? [KMSignature] {
                    for model in array {
                        signatureList.append(model)
                    }
                }
            }
        }
    }
    
    func removeAllObject() {
        signatureList.removeAll()
    }
    
    func removeObject(index: Int) {
        signatureList.remove(at: index)
    }
    
    @objc func addSignature(_ signature: KMSignature) {
        signatureList.append(signature)
        
        saveSingaturesToFile()
    }
    
    func removeObject(_ signature: KMSignature) {
        signatureList.removeObject(signature)
        
        saveSingaturesToFile()
    }
    
    @objc func saveSingaturesToFile() {
        if let fileDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
            let filePath = fileDirectory.appendingPathComponent("NewSignatureList")
            NSKeyedArchiver.archiveRootObject(signatureList, toFile: filePath.path)
        }
    }
}