//
//  KMSignUpView.swift
//  PDF Reader Pro
//
//  Created by wanjun on 2024/10/23.
//

import Cocoa
import Combine

class KMSignUpView: KMBaseXibView {
    
    @IBOutlet weak var signUpLabel: NSTextField!
    @IBOutlet weak var loginModeBox: NSBox!
    @IBOutlet weak var verificationCodeButton: NSButton!
    @IBOutlet weak var selectBox1: NSBox!
    @IBOutlet weak var passwordButton: NSButton!
    @IBOutlet weak var selectBox2: NSBox!
    @IBOutlet weak var emailBox: NSBox!
    @IBOutlet weak var emailTextField: NSTextField!
    @IBOutlet weak var emailErrorLabel: NSTextField!
    @IBOutlet weak var passwordBox: NSBox!
    @IBOutlet weak var verifficationView: NSView!
    @IBOutlet weak var verifficationBox: NSBox!
    @IBOutlet weak var verifficationTextField: NSTextField!
    @IBOutlet weak var sendBox: KMBox!
    @IBOutlet weak var sendLabel: NSTextField!
    @IBOutlet weak var passwordView: NSView!
    @IBOutlet weak var passwordTextField: NSTextField!
    @IBOutlet weak var passwordTextField1: NSSecureTextField!
    
    @IBOutlet weak var visibleButton: NSButton!
    @IBOutlet weak var passwordErrorLabel: NSTextField!
    @IBOutlet weak var stayCheckButton: NSButton!
    @IBOutlet weak var stayLabel: NSTextField!
    @IBOutlet weak var forgetButton: NSButton!
    @IBOutlet weak var signUpBox: NSBox!
    @IBOutlet weak var signUpButton: NSButton!
    @IBOutlet weak var privacyCheckButton: NSButton!
    @IBOutlet weak var privacyLabel: NSTextField!
        
    private var viewModel = KMSignUpViewModel()
    private var cancellables = Set<AnyCancellable>()
    
    convenience init(model: KMSignUpViewModel, superView: NSView) {
        self.init(frame: superView.bounds)
        viewModel = model
        viewModel.screenType = .signUp
        
        bindViewModel()
        languageLocalized()
        initializeUI()
    }
    
    public override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
    }
    
    public required init?(coder decoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public func resetTextFileData() {
        if(self.superview != nil) {
            emailTextField.stringValue = ""
            passwordTextField.stringValue = ""
            passwordTextField1.stringValue = ""
            verifficationTextField.stringValue = ""
            emailErrorLabel.isHidden = true
            passwordErrorLabel.isHidden = true
            sendLabel.stringValue = NSLocalizedString("Send", tableName: "MemberCenterLocalizable", comment: "")
            viewModel.sendContent = NSLocalizedString("Send", tableName: "MemberCenterLocalizable", comment: "")
            viewModel.email = ""
            sendBoxRefresh()
        }
    }
    
    override func updateUI() {
        super.updateUI()
        
        NotificationCenter.default.addObserver(self, selector: #selector(loginSuccessNotification), name: NSNotification.Name(rawValue: "MemberCenterLoginSuccess"), object: nil)
        
        bindViewModel()
        languageLocalized()
        initializeUI()
    }
    
    // MARK: Private Method
    
    private func languageLocalized() -> Void {
        signUpLabel.stringValue = NSLocalizedString("Sign in(titile)", tableName: "MemberCenterLocalizable", comment: "")
        verificationCodeButton.title = NSLocalizedString("Verification Code", tableName: "MemberCenterLocalizable", comment: "")
        passwordButton.title = NSLocalizedString("Password", tableName: "MemberCenterLocalizable", comment: "")
        stayLabel.stringValue = NSLocalizedString("Stay signed in", tableName: "MemberCenterLocalizable", comment: "")
        forgetButton.title = NSLocalizedString("Forgot password?", tableName: "MemberCenterLocalizable", comment: "")
        signUpButton.title = NSLocalizedString("Sign in(button)", tableName: "MemberCenterLocalizable", comment: "")
        emailErrorLabel.stringValue = String(format: "*%@", NSLocalizedString("Email format error. Please enter the correct email.", tableName: "MemberCenterLocalizable", comment: ""))
        passwordErrorLabel.stringValue = String(format: "*%@", NSLocalizedString("Verification code error.", tableName: "MemberCenterLocalizable", comment: ""))
        emailTextField.placeholderString = NSLocalizedString("Please enter email address", tableName: "MemberCenterLocalizable", comment: "")
        verifficationTextField.placeholderString = NSLocalizedString("Please enter code", tableName: "MemberCenterLocalizable", comment: "")
        passwordTextField.placeholderString = NSLocalizedString("Please enter password", tableName: "MemberCenterLocalizable", comment: "")
        passwordTextField1.placeholderString = NSLocalizedString("Please enter password", tableName: "MemberCenterLocalizable", comment: "")
        privacyCheckButton.toolTip = NSLocalizedString("Please agree and check the above agreement first.", tableName: "MemberCenterLocalizable", comment: "")
        emailTextField.stringValue = viewModel.email
        verifficationTextField.stringValue = viewModel.verificationCode
        passwordTextField.stringValue = viewModel.password
        passwordTextField1.stringValue = viewModel.password
    }
    
    private func initializeUI() -> Void {
        emailBox.fillColor = NSColor(named: "texefiedfillcolor") ?? NSColor.white
        passwordBox.fillColor = NSColor(named: "texefiedfillcolor") ?? NSColor.white

        emailTextField.delegate = self
        verifficationTextField.delegate = self
        passwordTextField.delegate = self
        passwordTextField1.delegate = self
        
        emailErrorLabel.isHidden = !viewModel.emailError()
        passwordErrorLabel.isHidden = !viewModel.passwordError()

        signUpLabel.textColor = NSColor(named: "000000")
        signUpLabel.font = NSFont.SFMediumFontWithSize(20)
        selectBox1.fillColor = NSColor(named: "4982E6") ?? NSColor.blue
        emailErrorLabel.textColor = NSColor(named: "FA1E5D")
        emailErrorLabel.font = NSFont.SFProTextRegularFont(9)
        passwordBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
        verifficationBox.borderColor = NSColor(named: "FA1E5D") ?? NSColor.gray
        if viewModel.isValidEmail() {
            sendBox.fillColor = NSColor(named: "273C62") ?? NSColor.blue
        } else {
            sendBox.fillColor = NSColor(named: "273C62_0.4") ?? NSColor.blue
        }
        sendBox.borderColor = NSColor(named: "273C62") ?? NSColor.blue
        sendLabel.textColor = NSColor(named: "FFFFFF") ?? NSColor.white
        sendLabel.font = NSFont.SFProTextRegularFont(13)
        passwordErrorLabel.textColor = NSColor(named: "FA1E5D")
        passwordErrorLabel.font = NSFont.SFProTextRegularFont(9)
        stayCheckButton.image = NSImage(named: "CheckBoxNor")
        stayLabel.textColor = NSColor(named: "0E1114") ?? NSColor.black
        stayLabel.font = NSFont.SFProTextRegularFont(12)
        forgetButton.setTitleColor(color: NSColor(named: "4982E6") ?? NSColor.blue, font: NSFont.SFProTextRegularFont(12))
        signUpBox.fillColor = NSColor(named: "273C62") ?? NSColor.blue
        signUpButton.setTitleColor(color: NSColor(named: "FFFFFF") ?? NSColor.white, font: NSFont.SFProTextRegularFont(16))
        privacyCheckButton.image = NSImage(named: "CheckBoxNor")
        privacyLabel.isEditable = false
        privacyLabel.isSelectable = true
        privacyLabel.allowsEditingTextAttributes = true
        privacyLabel.textColor = NSColor.black
        privacyLabel.font = NSFont.SFProTextRegularFont(16.0)
        let tipsString = NSLocalizedString("I have read and agreed to the %@ and %@. An account will be automatically created after signing in with an unregistered email address.", tableName: "MemberCenterLocalizable", comment: "")
        let specialOffer = NSLocalizedString("Terms of Service", tableName: "MemberCenterLocalizable", comment: "")
        let contactsUs = NSLocalizedString("Privacy Policy", tableName: "MemberCenterLocalizable", comment: "")
        let fullString = String(format: tipsString, specialOffer, contactsUs)
        let attributedString = NSMutableAttributedString(string: fullString)
        // 定义链接的范围
        let specialOfferRange = (fullString as NSString).range(of: specialOffer)
        let contactsUsRange = (fullString as NSString).range(of: contactsUs)
        let linkColor = NSColor(named: "4982E6") ?? NSColor.blue
        let font = NSFont.SFProTextRegularFont(11.0) // 与普通文本相同的字体
        attributedString.addAttributes([
            .foregroundColor: NSColor(named: "0E1114") ?? NSColor.black as Any,
            .font: font
        ], range: (fullString as NSString).range(of: fullString))
        attributedString.addAttributes([
            .foregroundColor: linkColor,
            .link: NSLocalizedString("https://www.pdfreaderpro.com/terms_of_service", comment: ""),
            .font: font
        ], range: specialOfferRange)
        attributedString.addAttributes([
            .foregroundColor: linkColor,
            .link: NSLocalizedString("https://www.pdfreaderpro.com/privacy-policy", comment: ""),
            .font: font
        ], range: contactsUsRange)
        privacyLabel.attributedStringValue = attributedString
        
        signUpStateChange()
        visibleStateChange()
        textfieldInputState(isEmail: true)
        textfieldInputState(isEmail: false)
        sendBoxRefresh()
        
        sendBox.moveCallback =  { [weak self](mouseEntered: Bool, mouseBox: KMBox) -> Void in
            guard let self = self else { return }
            if self.viewModel.email.count <= 0 { return }
            if self.viewModel.sendBoxSelect { return }
            if !self.viewModel.isValidEmail() { return }
            if mouseEntered {
                self.sendBox.fillColor = NSColor(named: "000000_0.1") ?? NSColor.blue
            } else {
                self.sendBox.fillColor = NSColor(named: "273C62") ?? NSColor.blue
            }
        }
        sendBox.downCallback = { [weak self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
            guard let self = self else { return }
            if self.viewModel.email.count <= 0 { return }
            if self.viewModel.sendBoxSelect { return }
            if downEntered {
                self.sendBox.fillColor = NSColor(named: "273C62_0.4") ?? NSColor.blue
                self.viewModel.countDown(type: .login)
            }
        }
    }
    
    private func signUpStateChange() -> Void {
        if viewModel.signUpState == .verificationCode {
            selectBox1.isHidden = false
            selectBox2.isHidden = true
            verificationCodeButton.setTitleColor(color: NSColor(named: "4982E6") ?? NSColor.systemBlue, font: NSFont.SFProTextRegularFont(14))
            passwordButton.setTitleColor(color: NSColor(named: "42464D") ?? NSColor.black, font: NSFont.SFProTextRegularFont(14))
            verifficationView.isHidden = false
            passwordView.isHidden = true
            verifficationTextField.placeholderString = NSLocalizedString("Please enter code", tableName: "MemberCenterLocalizable", comment: "")
            forgetButton.isHidden = true
        } else if viewModel.signUpState == .password {
            selectBox1.isHidden = true
            selectBox2.isHidden = false
            verificationCodeButton.setTitleColor(color: NSColor(named: "42464D") ?? NSColor.black, font: NSFont.SFProTextRegularFont(14))
            passwordButton.setTitleColor(color: NSColor(named: "4982E6") ?? NSColor.black, font: NSFont.SFProTextRegularFont(14))
            verifficationView.isHidden = true
            passwordView.isHidden = false
            passwordTextField.placeholderString = NSLocalizedString("Please enter password", tableName: "MemberCenterLocalizable", comment: "")
            passwordTextField1.placeholderString = NSLocalizedString("Please enter password", tableName: "MemberCenterLocalizable", comment: "")
            forgetButton.isHidden = false
        }
    }
    
    private func checkStateChange(button: NSButton!, state: Bool) -> Void {
        button.state = state ? .on : .off
        if button.state == .on {
            button.image = NSImage(named: "CheckBoxSel")
        } else {
            button.image = NSImage(named: "CheckBoxNor")
        }
    }
    
    private func visibleStateChange() -> Void {
        if viewModel.isVisible {
            visibleButton.image = NSImage(named: "passwordVisible")
            passwordTextField.isHidden = false
            passwordTextField1.isHidden = true
            passwordTextField.stringValue = viewModel.password
        } else {
            visibleButton.image = NSImage(named: "passwordUnVisible")
            passwordTextField.isHidden = true
            passwordTextField1.isHidden = false
            passwordTextField1.stringValue = viewModel.password
        }
    }
    
    private func textfieldInputState(isEmail: Bool) -> Void {
        if isEmail {
            if viewModel.emailError() {
                emailBox.borderColor = NSColor(named: "FA1E5D") ?? NSColor.red
            } else {
                emailBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
            }
            emailErrorLabel.isHidden = !viewModel.emailError()
        } else {
            if viewModel.passwordError() {
                if viewModel.signUpState == .verificationCode {
                    passwordBox.borderWidth = 0
                    verifficationBox.borderWidth = 1
                    passwordBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
                    verifficationBox.borderColor = NSColor(named: "FA1E5D") ?? NSColor.red
                } else if viewModel.signUpState == .password {
                    passwordBox.borderWidth = 1
                    verifficationBox.borderWidth = 0
                    verifficationBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
                    passwordBox.borderColor = NSColor(named: "FA1E5D") ?? NSColor.red
                }
            } else {
                if viewModel.signUpState == .verificationCode {
                    passwordBox.borderWidth = 1
                    verifficationBox.borderWidth = 0
                } else if viewModel.signUpState == .password {
                    passwordBox.borderWidth = 1
                    verifficationBox.borderWidth = 0
                }
            }
            passwordErrorLabel.isHidden = !viewModel.passwordError()
        }
    }
    
    private func sendBoxRefresh() -> Void {
        sendLabel.stringValue = viewModel.sendContent
        if viewModel.sendContent == NSLocalizedString("Send", tableName: "MemberCenterLocalizable", comment: "") ||
            viewModel.sendContent == NSLocalizedString("Resend", tableName: "MemberCenterLocalizable", comment: "") {
            if viewModel.email.count > 0 {
                if viewModel.isValidEmail() {
                    sendBox.fillColor = NSColor(named: "273C62") ?? NSColor.blue
                } else {
                    sendBox.fillColor = NSColor(named: "273C62_0.4") ?? NSColor.blue
                }
            } else {
                sendBox.fillColor = NSColor(named: "273C62_0.4") ?? NSColor.blue
            }
            sendLabel.textColor = NSColor(named: "FFFFFF") ?? NSColor.white
        } else {
            sendBox.fillColor = NSColor(named: "DADBDE") ?? NSColor.gray
            sendLabel.stringValue = String(format: "%@s", viewModel.sendContent)
            sendLabel.textColor = NSColor(named: "0E1114") ?? NSColor.black
        }
    }
    
    // MARK: Bind Method
    
    func bindViewModel() -> Void {
        viewModel.$isVisible
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.visibleStateChange()
            }
            .store(in: &cancellables)
        viewModel.$stayState
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.checkStateChange(button: self?.stayCheckButton, state: newValue)
            }
            .store(in: &cancellables)
        viewModel.$privacyState
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.checkStateChange(button: self?.privacyCheckButton, state: newValue)
            }
            .store(in: &cancellables)
        viewModel.$signUpState
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.signUpStateChange()
            }
            .store(in: &cancellables)
        viewModel.$emailErrorMessage
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.emailErrorLabel.stringValue = newValue
                self?.emailErrorLabel.isHidden = false
                self?.textfieldInputState(isEmail: true)
            }
            .store(in: &cancellables)
        viewModel.$passwordErrorMessage
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.passwordErrorLabel.stringValue = newValue
                if self?.viewModel.passwordErrorMessage == "" {
                    self?.passwordErrorLabel.isHidden = true
                } else {
                    self?.passwordErrorLabel.isHidden = false
                }
            }
            .store(in: &cancellables)
        viewModel.$sendContent
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.sendBoxRefresh()
            }
            .store(in: &cancellables)
        viewModel.$email
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                self?.sendBoxRefresh()
            }
            .store(in: &cancellables)
        viewModel.$verificationCode
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                if newValue.count <= 6 && newValue.count >= 0 {
                    self?.viewModel.passwordErrorMessage = ""
                } else {
                    self?.viewModel.passwordErrorMessage = NSLocalizedString("Verification code error.", tableName: "MemberCenterLocalizable", comment: "")
                }
            }
            .store(in: &cancellables)
        viewModel.$password
            .receive(on: RunLoop.main)
            .sink { [weak self] newValue in
                if newValue.count <= 30 && newValue.count >= 0 {
                    self?.viewModel.passwordErrorMessage = ""
                } else {
                    self?.viewModel.passwordErrorMessage = NSLocalizedString("Account or password error.", tableName: "MemberCenterLocalizable", comment: "")
                }
            }
            .store(in: &cancellables)
    }
    
        
    // MARK: Action Method
    
    @IBAction func verificationCodeAction(_ sender: NSButton) {
        viewModel.signUpStateChange(state: .verificationCode)
    }
    
    @IBAction func passwordAction(_ sender: NSButton) {
        viewModel.signUpStateChange(state: .password)
    }
    
    @IBAction func visibleAction(_ sender: NSButton) {
        viewModel.isVisible.toggle()
    }
    
    @IBAction func stayCheckAction(_ sender: NSButton) {
        viewModel.stayState.toggle()
        viewModel.stayStateAction()
    }
    
    @IBAction func signUpAction(_ sender: NSButton) {
        self.window?.makeFirstResponder(nil)
        
        viewModel.emailErrorMessage = ""
        viewModel.passwordErrorMessage = ""
        viewModel.signUpAction()
    }
    
    @IBAction func forgetAction(_ sender: NSButton) {
        guard let parentView = self.superview else { return }
        if parentView is NSBox {
            let model = KMSignUpViewModel()
            model.email = viewModel.email
            let forgotView = KMForgotPasswordView(model: model, superView: parentView)
            NSAnimationContext.runAnimationGroup { context in
                context.duration = 0.3
                self.animator().alphaValue = 0
            } completionHandler: {
                self.removeFromSuperview()
                forgotView.alphaValue = 0
                (parentView as! NSBox).contentView = forgotView
                NSAnimationContext.runAnimationGroup({ context in
                    context.duration = 0.3
                    forgotView.animator().alphaValue = 1
                }, completionHandler: nil)
            }
        } else {
            let model = KMSignUpViewModel()
            model.email = viewModel.email
            let forgotView = KMForgotPasswordView(model: model, superView: parentView)
            NSAnimationContext.runAnimationGroup { context in
                context.duration = 0.3
                self.animator().alphaValue = 0
            } completionHandler: {
                self.removeFromSuperview()
                forgotView.alphaValue = 0
                parentView.addSubview(forgotView)
                NSAnimationContext.runAnimationGroup({ context in
                    context.duration = 0.3
                    forgotView.animator().alphaValue = 1
                }, completionHandler: nil)
            }
        }
    }
    
    @IBAction func privacyCheckAction(_ sender: NSButton) {
        viewModel.privacyState.toggle()
    }
}

extension KMSignUpView: NSTextFieldDelegate {
    func controlTextDidEndEditing(_ obj: Notification) {
        let textField = obj.object as? NSTextField
        if textField == emailTextField {
            viewModel.email = textField!.stringValue
        } else if textField == verifficationTextField {
            viewModel.verificationCode = textField!.stringValue
        } else if textField == passwordTextField {
            viewModel.password = textField!.stringValue
        } else if textField == passwordTextField1 {
            viewModel.password = textField!.stringValue
        }
    }
    
    func controlTextDidChange(_ obj: Notification) {
        let textField = obj.object as? NSTextField
        if textField == emailTextField {
            viewModel.emailErrorMessage = ""
            viewModel.email = textField!.stringValue
            emailBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
        } else if textField == verifficationTextField {
            viewModel.passwordErrorMessage = ""
            viewModel.verificationCode = textField!.stringValue
            verifficationBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
        } else if textField == passwordTextField {
            viewModel.passwordErrorMessage = ""
            viewModel.password = textField!.stringValue
            passwordBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
        } else if textField == passwordTextField1 {
            viewModel.passwordErrorMessage = ""
            viewModel.password = textField!.stringValue
            passwordBox.borderColor = NSColor(named: "DADBDE") ?? NSColor.gray
        }
    }
    
    @objc func loginSuccessNotification() -> Void {
        resetTextFileData()
    }
}