//
//  TRTCRegisterRootView.swift
//  TXLiteAVDemo
//
//  Created by gg on 2021/4/8.
//  Copyright © 2021 Tencent. All rights reserved.
//

import UIKit

class TRTCRegisterRootView: UIView {
    
    lazy var headImageView: UIImageView = {
        let imageView = UIImageView(frame: .zero)
        imageView.contentMode = .scaleAspectFill
        imageView.layer.cornerRadius = 50
        imageView.clipsToBounds = true
        return imageView
    }()
    
    lazy var textLable: UILabel = {
        let label = UILabel()
        label.text = .nicknameText
        label.font = UIFont(name: "PingFangSC-Regular", size: 16)
        label.adjustsFontSizeToFitWidth = true
        return label
    }()
    
    lazy var textField: UITextField = {
        let textField = createTextField(.nicknamePlaceholderText)
        return textField
    }()
    
    lazy var textFieldSpacingLine: UIView = {
        let view = createSpacingLine()
        return view
    }()
    
    lazy var descLabel: UILabel = {
        let label = UILabel(frame: .zero)
        label.font = UIFont(name: "PingFangSC-Regular", size: 16)
        label.textColor = .darkGray
        label.text = .descText
        label.adjustsFontSizeToFitWidth = true
        return label
    }()
    
    lazy var registBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setTitleColor(.white, for: .normal)
        btn.setTitle(.registText, for: .normal)
        btn.adjustsImageWhenHighlighted = false
        btn.setBackgroundImage(UIColor.tui_color(withHex: "006EFF").trans2Image(), for: .normal)
        btn.titleLabel?.font = UIFont(name: "PingFangSC-Medium", size: 18)
        btn.layer.shadowColor = UIColor.tui_color(withHex: "006EFF").cgColor
        btn.layer.shadowOffset = CGSize(width: 0, height: 6)
        btn.layer.shadowRadius = 16
        btn.layer.shadowOpacity = 0.4
        btn.layer.masksToBounds = true
        btn.isEnabled = false
        return btn
    }()
    
    private func createTextField(_ placeholder: String) -> UITextField {
        let textField = UITextField(frame: .zero)
        textField.backgroundColor = .white
        textField.font = UIFont(name: "PingFangSC-Regular", size: 16)
        textField.textColor = UIColor.tui_color(withHex: "333333")
        textField.attributedPlaceholder = NSAttributedString(string: placeholder,
                                                             attributes: [NSAttributedString.Key.font:
                                                                            UIFont(name: "PingFangSC-Regular", size: 16) ??
                                                                          UIFont.systemFont(ofSize: 16),
                                                                          NSAttributedString.Key.foregroundColor :
                                                                            UIColor.tui_color(withHex: "BBBBBB"),])
        textField.delegate = self
        return textField
    }
    
    private func createSpacingLine() -> UIView {
        let view = UIView(frame: .zero)
        view.backgroundColor = UIColor.tui_color(withHex: "EEEEEE")
        return view
    }
    
    override func draw(_ rect: CGRect) {
        super.draw(rect)
        registBtn.layer.cornerRadius = registBtn.frame.height * 0.5
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        
        textField.resignFirstResponder()
        UIView.animate(withDuration: 0.3) {
            self.transform = .identity
        }
        checkRegistBtnState()
    }
    
    weak var rootVC: TRTCRegisterViewController?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardFrameChange(noti:)), name:
                                                UIResponder.keyboardWillChangeFrameNotification, object: nil)
    }
    
    deinit {
        NotificationCenter.default.removeObserver(self)
    }
    
    @objc func keyboardFrameChange(noti : Notification) {
        guard let info = noti.userInfo else {
            return
        }
        guard let value = info[UIResponder.keyboardFrameEndUserInfoKey], value is CGRect else {
            return
        }
        guard let superview = textField.superview else {
            return
        }
        let rect = value as! CGRect
        let converted = superview.convert(textField.frame, to: self)
        if rect.intersects(converted) {
            transform = CGAffineTransform(translationX: 0, y: -converted.maxY+rect.minY)
        }
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    var isViewReady = false
    override func didMoveToWindow() {
        super.didMoveToWindow()
        guard !isViewReady else {
            return
        }
        isViewReady = true
        constructViewHierarchy()
        activateConstraints()
        bindInteraction()
        
        if let url = ProfileManager.shared.curUserModel?.avatar, url.count > 0 {
            headImageView.sd_setImage(with: URL(string: url))
        } else {
            let url = "https://liteav.sdk.qcloud.com/app/res/picture/voiceroom/avatar/user_avatar1.png"
            ProfileManager.shared.curUserModel?.avatar = url
            headImageView.sd_setImage(with: URL(string: url))
        }
    }
    
    func constructViewHierarchy() {
        addSubview(headImageView)
        addSubview(textLable)
        addSubview(textField)
        addSubview(textFieldSpacingLine)
        addSubview(descLabel)
        addSubview(registBtn)
    }
    func activateConstraints() {
        headImageView.snp.makeConstraints { (make) in
            make.centerX.equalToSuperview()
            make.top.equalToSuperview().offset(kDeviceSafeTopHeight + 70)
            make.size.equalTo(CGSize(width: 100, height: 100))
        }
        textLable.snp.makeConstraints { (make) in
            make.top.equalTo(headImageView.snp.bottom).offset(convertPixel(h: 40))
            make.leading.equalToSuperview().offset(convertPixel(w: 40))
            make.height.equalTo(convertPixel(h: 57))
            make.width.equalTo(convertPixel(w: 60))
        }
        textField.snp.makeConstraints { (make) in
            make.top.equalTo(textLable)
            make.leading.equalTo(textLable.snp.trailing).offset(convertPixel(w: 5))
            make.trailing.equalToSuperview().offset(-convertPixel(w: 40))
            make.height.equalTo(convertPixel(h: 57))
        }
        textFieldSpacingLine.snp.makeConstraints { (make) in
            make.bottom.trailing.equalTo(textField)
            make.leading.equalTo(textLable)
            make.height.equalTo(1)
        }
        descLabel.snp.makeConstraints { (make) in
            make.top.equalTo(textField.snp_bottom).offset(10)
            make.leading.equalToSuperview().offset(convertPixel(w: 40))
            make.trailing.lessThanOrEqualToSuperview().offset(convertPixel(w: -40))
        }
        registBtn.snp.makeConstraints { (make) in
            make.top.equalTo(descLabel.snp_bottom).offset(convertPixel(h: 40))
            make.leading.equalToSuperview().offset(convertPixel(w: 20))
            make.trailing.equalToSuperview().offset(-convertPixel(w: 20))
            make.height.equalTo(convertPixel(h: 52))
        }
    }
    func bindInteraction() {
        registBtn.addTarget(self, action: #selector(registBtnClick), for: .touchUpInside)
        
        let tap = UITapGestureRecognizer(target: self, action: #selector(headBtnClick))
        headImageView.addGestureRecognizer(tap)
    }
    
    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        
        guard let superview = headImageView.superview else {
            return super.hitTest(point, with: event)
        }
        let rect = superview.convert(headImageView.frame, to: self)
        if rect.contains(point) {
            return headImageView
        }
        return super.hitTest(point, with: event)
    }
    
    @objc func headBtnClick() {
        
    }
    @objc func registBtnClick() {
        textField.resignFirstResponder()
        guard let name = textField.text else {
            return
        }
        if name.utf8.count > 30 {
            makeToast(.nameTooLongText, duration: 1)
        } else {
            ProfileManager.shared.curUserModel?.name = name
            rootVC?.regist(name)
        }
    }
    
    func checkRegistBtnState(_ count: Int = -1) {
        registBtn.isEnabled = count > 1
    }
}

extension TRTCRegisterRootView : UITextFieldDelegate {
    func textFieldDidBeginEditing(_ textField: UITextField) {
        textField.becomeFirstResponder()
    }
    func textFieldDidEndEditing(_ textField: UITextField) {
        textField.resignFirstResponder()
        UIView.animate(withDuration: 0.3) {
            self.transform = .identity
        }
        checkRegistBtnState()
    }
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        let maxCount = 20
        guard let textFieldText = textField.text,
            let rangeOfTextToReplace = Range(range, in: textFieldText) else {
                return false
        }
        let substringToReplace = textFieldText[rangeOfTextToReplace]
        let count = textFieldText.count - substringToReplace.count + string.count
        let res = count <= maxCount
        
        if res {
            checkRegistBtnState(count)
            if string.isEmpty {
                return true
            }else if string.count > 1 {
                for char in string {
                    let str = String(char)
                    if !validateString(str) {
                        return false
                    }
                }
                return true
            }else{
                return validateString(string)
            }
        }
        return res
    }
}
func validateString(_ string: String) -> Bool {
        let regex = try! NSRegularExpression(pattern: "^[a-zA-Z0-9_\u{4e00}-\u{9fa5}]{0,20}$")
        let range = NSRange(location: 0, length: string.utf16.count)
        return regex.firstMatch(in: string, options: [], range: range) != nil
    }

/// MARK: - internationalization string
fileprivate extension String {
    static let nicknamePlaceholderText = LoginLocalize(key:"Please enter a nickname")
    static let descText = LoginLocalize(key:"Letters, numbers and underscores")
    static let registText = LoginLocalize(key:"Sign Up")
    static let nameTooLongText = LoginLocalize(key:"Your Nickname is too long")
    static let nicknameText = LoginLocalize(key:"Nickname")
}