//
//  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
}

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

class KMSignUpViewModel: ObservableObject {
    /**
     是否可视，默认不可视
     */
    @Published var isVisible: Bool = false
    /**
     是否保持登录，默认不保持登录
     */
    @Published var stayState: Bool = false
    /**
     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: "")

    @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
        }
        if signUpState == .verificationCode {
            signUpState = .password
        } else {
            signUpState = .verificationCode
        }
    }
    
    func countDown(type: KMVerificationCodeType, count: Int = 60) -> Void {
        getVerificationCode(type)
        if emailErrorMessage.count > 0 {
            return
        }
        
        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: "")
                    sendBoxSelect = false
                }
            }
    }
    
    // MARK: Public Method
    
    /**
     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
    }

    
    // MARK: Private Method
    
    /**
     @abstract 验证邮箱是否合规
     */
    private 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
     */
    private 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
    }
        
    // MARK: Action Method
    
    /**
     @abstract KMSignUpView Sign Up 登录按钮响应事件
     @param
     */
    func signUpAction() -> Void {
        if email.count <= 0 {
            emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            return
        }
        if !isValidEmail() {
            emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            return
        }
        
        var code = password
        if signUpState == .verificationCode {
            if verificationCode.count <= 0 {
                passwordErrorMessage = NSLocalizedString("*Please enter right Verification code", tableName: "MemberCenterLocalizable", comment: "")
                return
            }
            if verificationCode.count <= 0 {
                emailErrorMessage = NSLocalizedString("*Please enter right Verification code", tableName: "MemberCenterLocalizable", comment: "")
                return
            }
            code = verificationCode
        } else if signUpState == .password {
            if password.count <= 0 {
                passwordErrorMessage = NSLocalizedString("*Please enter right Verification code", tableName: "MemberCenterLocalizable", comment: "")
                return
            }
        }
        KMMemberCenterManager.manager.emailLogin(email: email, code: code) { [weak self] error, wrapper  in
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg
            if error {
                print("错误信息：%@", msg as Any)
            } else {
                if resultDict.code == 200 {
                    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
                } else {
                    print("错误信息：%@", msg as Any)
                }
            }
        }
    }
    
    /**
     @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 !isValidEmail() {
            emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            return
        }

        if email.count <= 0 {
            emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            return
        }
        if emailErrorMessage.count > 0 {
            return
        }
        
        KMMemberCenterManager.manager.emailVerification(email: email) { [weak self] error, wrapper  in
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg! as String
            if error {
                print("错误信息：%@", msg as Any)
            } else {
                if resultDict.code == 200 {
                    let result: Bool = resultDict.result!
                    if result {
                        complete(true, msg)
                    } else {
                        complete(false, msg)
                    }
                } else {
                    print("错误信息：%@", msg as Any)
                }
            }
        }
    }
    
    /**
     @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 verificationCode.count <= 0 {
            emailErrorMessage = NSLocalizedString("*Please enter right Verification code", tableName: "MemberCenterLocalizable", comment: "")
            complete(false, "")
            return
        }
        if !isValidVerificationCode() {
            emailErrorMessage = NSLocalizedString("*Please enter right Verification code", tableName: "MemberCenterLocalizable", comment: "")
            complete(false, "")
            return
        }
        complete(true, "")
    }
    
    /**
     @abstract 获取邮箱验证码
     @param
     */
    func getVerificationCode(_ type: KMVerificationCodeType) -> Void {
        if !isValidEmail() {
            emailErrorMessage = NSLocalizedString("Please enter the correct email format", tableName: "MemberCenterLocalizable", comment: "")
            return
        }
        KMMemberCenterManager.manager.getVerificationCode(action: type, receiver: email) { [weak self] error, wrapper  in
            guard let self = self else { return }
            let resultDict = wrapper! as KMMemberCenterResult
            let msg = resultDict.msg
            let result: Bool = resultDict.result ?? false
            if error {
                if !result {
                    self.emailErrorMessage = NSLocalizedString("*Please enter right Address", tableName: "MemberCenterLocalizable", comment: "")
                    print("错误信息：%@", msg as Any)
                }
            } else {
                if resultDict.code == 200 {
                    if !result {
                        self.emailErrorMessage = NSLocalizedString("*Please enter right Address", tableName: "MemberCenterLocalizable", comment: "")
                    } else {
                        print("验证邮箱成功")
                    }
                } else {
                    print("错误信息：%@", msg as Any)
                }
            }
        }
    }
    
    /**
     @abstract 获取邮箱验证码
     @param
     */
    func resetPassword(_ complete: @escaping ForgotPasswordComplete) -> Void {
        KMMemberCenterManager.manager.resetPassword(email: email, verifyCode: verificationCode, password: password) { [weak self] error, 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
            if error {
                if !result {
                    print("错误信息：%@", msg as Any)
                    complete(false, msg)
                }
            } else {
                if resultDict.code == 200 {
                    if !result {
                        print("错误信息：%@", msg as Any)
                        complete(false, msg)
                    } else {
                        print("验证邮箱成功")
                        complete(false, msg)
                    }
                } else {
                    print("错误信息：%@", msg as Any)
                    complete(false, msg)
                }
            }
        }
    }
}