//
//  KMSignUpViewModel.swift
//  PDF Reader Pro
//
//  Created by wanjun on 2024/10/24.
//

import Foundation
import Combine

@objc enum KMSignUpState : Int {
    case verificationCode = 0   // 验证码
    case password               // 密码
}

@objc enum KMSuccessLoginJump : Int {
    case null = 0   //
    case compare    // 比较表
}

@objc enum KMLoginScreenType : Int {
    case signUp = 0   //
    case forgotPassword    //
    case enterVerificationCode    //
    case enterNewPassword    //
}

typealias ForgotPasswordComplete = (_ success: Bool,_ msg: String) -> Void

@objcMembers
class KMSignUpViewModel: ObservableObject {
    /**
     是否可视，默认不可视
     */
    @Published var isVisible: Bool = false
    /**
     是否保持登录，默认保持登录
     */
    @Published var stayState: Bool = true
    /**
     是否同意隐私权限
     */
    @Published var privacyState: Bool = false
    /**
     登录界面是验证码验证还是邮箱验证
     */
    @Published var signUpState: KMSignUpState = .verificationCode
    /**
     用户邮箱，字符串格式，默认为空
     */
    @Published var email: String = ""
    /**
     用户邮箱登录的验证码，字符串格式，默认为空
     */
    @Published var verificationCode: String = ""
    /**
     用户邮箱登录的密码，字符串格式，默认为空
     */
    @Published var password: String = ""
    /**
     邮件 错误提示文案
     */
    @Published var emailErrorMessage: String = ""
    /**
     验证码 / 密码 错误提示文案
     */
    @Published var passwordErrorMessage: String = ""
    /**
     序列码按钮 文案
     */
    @Published var sendContent: String = NSLocalizedString("Send", tableName: "MemberCenterLocalizable", comment: "")
    /**
     当前视图类型
     */
    @Published var screenType: KMLoginScreenType = .signUp

    @Published private var timer: AnyCancellable?
    private var remainingSeconds: Int = 60
    
    var sendBoxSelect: Bool = false

    // MARK: Public Method
    
    func signUpStateChange(state: KMSignUpState) -> Void {
        if state == signUpState {
            return
        }
        emailErrorMessage = ""
        passwordErrorMessage = ""
        if signUpState == .verificationCode {
            signUpState = .password
        } else {
            signUpState = .verificationCode
        }
    }
    
    func countDown(type: KMVerificationCodeType, count: Int = 60, callback: ((Bool?, Any ...)->Void)?) -> Void {
        if emailErrorMessage.count > 0 || !isValidEmail() {
            return
        }
        getVerificationCode(type, callback: callback)
        
        sendBoxSelect = true
        remainingSeconds = count
        timer = Timer.publish(every: 1, on: .main, in: .common)
            .autoconnect()
            .sink { [weak self] _ in
                guard let self = self else { return }
                if self.remainingSeconds > 0 {
                    self.remainingSeconds -= 1
                    self.sendContent = String(format: "%d", self.remainingSeconds)
                } else {
                    // 倒计时结束，停止定时器
                    self.timer?.cancel()
                    self.sendContent = NSLocalizedString("Resend", tableName: "MemberCenterLocalizable", comment: "")
                    self.sendBoxSelect = false
                }
            }
    }
    
    /**
     邮件 错误提示文案
     */
    func emailError() -> Bool {
        if emailErrorMessage.count > 0 {
            return true
        }
        return false
    }
    
    /**
     验证码 / 密码 格式错误
     */
    func passwordError() -> Bool {
        if passwordErrorMessage.count > 0 {
            return true
        }
        return false
    }
    
    /**
     @abstract 验证邮箱是否合规
     */
    func isValidEmail() -> Bool {
        let emailRegex = "^[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}$"
        let emailTest = NSPredicate(format: "SELF MATCHES %@", emailRegex)
        return emailTest.evaluate(with: email)
    }
    
    /**
     @abstract 验证验证码是否合规
     */
    func isValidVerificationCode() -> Bool {
        let pattern = "^\\d{6}$"
        let regex = try! NSRegularExpression(pattern: pattern)
        return regex.firstMatch(in: verificationCode, options: [], range: NSRange(location: 0, length: verificationCode.utf16.count)) != nil
    }
    
    func stayStateAction() -> Void {
        if !stayState {
            UserDefaults.standard.setValue("", forKey: "MemberAccessToken")
            UserDefaults.standard.synchronize()
        }
    }
    
    // MARK: Private Method
        
    /**
     @abstract 刷新用户个人信息
     */
    private func refreshUserInfo(callback: ((Bool?, Any ...)->Void)?) -> Void {
        if KMMemberCenterManager.manager.isConnectionAvailable() == false {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("Error Information", comment: "")
            alert.informativeText = NSLocalizedString("Please make sure your internet connection is available.", comment: "")
            alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
            alert.runModal()
            
            callback?(nil)
            return
        }
        
        KMUserInfoVCModel().refreshUserInfo(networkAlert: false) { success, msg in
            callback?(success)
            if success {
                KMMemberInfo.shared.isLogin = true
                NotificationCenter.default.post(name: NSNotification.Name(rawValue: "MemberCenterLoginSuccess"), object: nil)
            } else {
                KMMemberInfo.shared.isLogin = false
            }
        }
    }
        
    // MARK: Action Method
    
    /**
     @abstract KMSignUpView Sign Up 登录按钮响应事件
     @param
     */
    func signUpAction(callback: ((Bool?, Any ...)->Void)?) -> Void {
        if KMMemberCenterManager.manager.isConnectionAvailable() == false {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("Error Information", comment: "")
            alert.informativeText = NSLocalizedString("Please make sure your internet connection is available.", comment: "")
            alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
            alert.runModal()
            
            callback?(nil)
            return
        }
        if email.isEmpty {
            emailErrorMessage = NSLocalizedString("Please enter email address", tableName: "MemberCenterLocalizable", comment: "")
            
            callback?(nil)
            return
        }
        
        if email.count <= 0 || email.count > 100 || !isValidEmail() {
            emailErrorMessage = NSLocalizedString("Email format error. Please enter the correct email.", tableName: "MemberCenterLocalizable", comment: "")
            
            callback?(nil)
            return
        }
        
        var code: String = ""
        if signUpState == .verificationCode {
            if verificationCode.isEmpty {
                passwordErrorMessage = NSLocalizedString("Please enter code", tableName: "MemberCenterLocalizable", comment: "")
                
                callback?(nil)
                return
            }
            
            if verificationCode.count <= 0 || verificationCode.count > 6 || !isValidVerificationCode() {
                passwordErrorMessage = NSLocalizedString("Verification code error.", tableName: "MemberCenterLocalizable", comment: "")
                
                callback?(nil)
                return
            }
            code = verificationCode
        } else if signUpState == .password {
            if password.count <= 0 || password.count > 30 {
                passwordErrorMessage = NSLocalizedString("Password cannot exceed 30 characters.", tableName: "MemberCenterLocalizable", comment: "")
                
                callback?(nil)
                return
            }
            code = password
        }
        if !privacyState {
            DispatchQueue.main.async {
                
                let alert = NSAlert()
                alert.messageText = NSLocalizedString("Please agree and check the above agreement first.", tableName: "MemberCenterLocalizable", comment: "")
                alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
                //            alert.beginSheetModal(for: NSApp.mainWindow!)
                let result = alert.runModal()
                if (result == .alertFirstButtonReturn) {
                    self.privacyState = true
                }
                
                callback?(nil)
            }
            return
        }
        KMMemberCenterManager.manager.emailLogin(email: email, code: code, type: signUpState) { [weak self] success, wrapper  in
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg
            if success {
                let result: KMMemberLoginResult = resultDict.login_Result!
                let refresh_token = result.refreshToken
                let access_token = result.accessToken
                let token_type = result.tokenType
                let expires_in = result.expiresIn
                let scope = result.scope
                if self.stayState {
                    UserDefaults.standard.setValue(refresh_token, forKey: "MemberRefreshToken")
                    UserDefaults.standard.setValue(access_token, forKey: "MemberAccessToken")
                    UserDefaults.standard.synchronize()
                } else {
                    UserDefaults.standard.setValue("", forKey: "MemberRefreshToken")
                    UserDefaults.standard.setValue("", forKey: "MemberAccessToken")
                    UserDefaults.standard.synchronize()
                }
                KMMemberInfo.shared.refresh_token = refresh_token!
                KMMemberInfo.shared.access_token = access_token!
                KMMemberInfo.shared.token_type = token_type!
                self.refreshUserInfo(callback: callback)
                
                self.timer?.cancel()
                self.sendContent = NSLocalizedString("Resend", tableName: "MemberCenterLocalizable", comment: "")

            } else {
                if(resultDict.code == 305) {
                    if KMMemberCenterManager.manager.isConnectionAvailable() == false {
                        DispatchQueue.main.async {
                            let alert = NSAlert()
                            alert.alertStyle = .critical
                            alert.messageText = NSLocalizedString("Error Information", comment: "")
                            alert.informativeText = NSLocalizedString("Please make sure your internet connection is available.", comment: "")
                            alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
                            alert.runModal()
                            
                            callback?(false)
                        }
                        return
                    }
                    KMMemberCenterManager.manager.getUserDeviceList(email: self.email) { [weak self] success, result in
                        callback?(false)
                        
                        guard self != nil else { return }
                        if success {
                            KMMemberCenterWindowController.shared.showWindow(nil)
                            KMMemberCenterWindowController.shared.signUpViewModel = self
                            KMMemberCenterWindowController.shared.memberCenterdeviceResult = result ?? KMMemberCenterResult(loginResult: KMMemberLoginResult(refreshToken: "", accessToken: "", tokenType: "", expiresIn: ""))
                        }
                    }
                } else {
                    callback?(false)
                    
                    print("错误信息：%@", msg as Any)
                    DispatchQueue.main.async {
                        let alert = NSAlert()
                        alert.messageText = NSLocalizedString(msg!, comment: "")
                        alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
                        let response = alert.runModal()
                        if response == .alertFirstButtonReturn {
                            if(resultDict.code == 317) {
                                self.signUpState = .verificationCode
                                self.countDown(type: .login, callback: nil)
                            } else {
                                
                            }
                        }
                    }
                }
            }
        }
    }
    
    /**
     @abstract KMForgotPasswordView 登录弹窗（忘记密码）Next 按钮响应事件
     @param
     */
    func forgotPasswordNextAction(_ complete: @escaping ForgotPasswordComplete) -> Void {
        if KMMemberCenterManager.manager.isConnectionAvailable() == false {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("Error Information", comment: "")
            alert.informativeText = NSLocalizedString("Please make sure your internet connection is available.", comment: "")
            alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
            alert.runModal()
            return
        }
        if email.count <= 0 || email.count > 100 || !isValidEmail() {
            emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            return
        }
        if emailErrorMessage.count > 0 {
            return
        }
        
        KMMemberCenterManager.manager.emailVerification(email: email) { [weak self] success, wrapper  in
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg! as String
            if success {
                complete(true, msg)
            } else {
                complete(false, msg)
            }
        }
    }
    
    /**
     @abstract KMEnterVerificationCodeView 登录弹窗（输入验证码）Next 按钮响应事件
     @param
     */
    func enterVerificationCodeNextAction(_ complete: @escaping ForgotPasswordComplete) -> Void {
        if KMMemberCenterManager.manager.isConnectionAvailable() == false {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("Error Information", comment: "")
            alert.informativeText = NSLocalizedString("Please make sure your internet connection is available.", comment: "")
            alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
            alert.runModal()
            return
        }
        if verificationCode.count <= 0 || verificationCode.count > 6 || !isValidVerificationCode() {
            emailErrorMessage = NSLocalizedString("Verification code error.", tableName: "MemberCenterLocalizable", comment: "")
            complete(false, "")
            return
        }
        KMMemberCenterManager.manager.checkVerificationCode(type: .reset, account: email, code: verificationCode) { [weak self] success, wrapper  in
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg
            let result: Bool = resultDict.result ?? false
            if success {
                complete(true, "")
            } else {
                self.passwordErrorMessage = NSLocalizedString("Verification code error.", tableName: "MemberCenterLocalizable", comment: "")
                complete(false, "")
            }
        }
    }
    
    /**
     @abstract 获取邮箱验证码
     @param
     */
    func getVerificationCode(_ type: KMVerificationCodeType, callback: ((Bool?, Any ...)->Void)?) -> Void {
        if KMMemberCenterManager.manager.isConnectionAvailable() == false {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("Error Information", comment: "")
            alert.informativeText = NSLocalizedString("Please make sure your internet connection is available.", comment: "")
            alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
            alert.runModal()
            
            callback?(nil)
            return
        }
        
        if !isValidEmail() {
            emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            
            callback?(nil)
            return
        }
        KMMemberCenterManager.manager.getVerificationCode(action: type, receiver: email) { [weak self] success, wrapper  in
            callback?(success)
            
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg
            let result: Bool = resultDict.result ?? false
            if success {
                print("验证邮箱成功")
            } else {
                self.emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            }
        }
    }
    
    /**
     @abstract 重置密码
     @param
     */
    func resetPassword(_ complete: @escaping ForgotPasswordComplete) -> Void {
        if KMMemberCenterManager.manager.isConnectionAvailable() == false {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("Error Information", comment: "")
            alert.informativeText = NSLocalizedString("Please make sure your internet connection is available.", comment: "")
            alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
            alert.runModal()
            return
        }
        
        if password.count <= 0 || verificationCode.count > 30 {
            passwordErrorMessage = NSLocalizedString("Password error.", tableName: "MemberCenterLocalizable", comment: "")
            return
        }
        KMMemberCenterManager.manager.resetPassword(email: email, verifyCode: verificationCode, password: password) { [weak self] success, wrapper  in
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg! as String
            let result: Bool = resultDict.result ?? false
            complete(success, msg)
        }
    }
}