LONDON-IOS/GME Remit/Utilities/TabBar Helper/CustomTabBar.swift

//
//  CustomTabBar.swift
//  GME Remit
//
//  Created by Dibya Malla Thakuri on 05/03/2023.
//  Copyright © 2023 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import RxGesture

final class CustomTabBar: UIStackView {
    
    var itemTapped: Observable<Int> { itemTappedSubject.asObservable() }
    
    private lazy var customItemViews: [CustomItemTabView] = [homeItem, sendItem, profileItem]
    
    private let homeItem = CustomItemTabView(with: .home, index: 0)
    private let sendItem = CustomItemTabView(with: .sendMoney, index: 1)
    private let profileItem = CustomItemTabView(with: .profile, index: 2)
    var itemTappedSubject = PublishSubject<Int>()
    private let disposeBag = DisposeBag()
    var selectedItem: Int = 0
    init() {
        super.init(frame: .zero)
        
        setupHierarchy()
        setupProperties()
        bind()
        setNeedsLayout()
        layoutIfNeeded()
        selectItem(index: selectedItem)
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(updateTabar),
            name: NSNotification.Name(getBeneficeriesNavigateName().rawValue),
            object: nil
        )

    }
    
    required init(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setupHierarchy() {
        addArrangedSubviews([homeItem, sendItem, profileItem])
    }
    
    private func setupProperties() {
        distribution = .fillEqually
        alignment = .top
        
        backgroundColor = .themeWhite
        setupCornerRadius(20)
        
        customItemViews.forEach {
            $0.translatesAutoresizingMaskIntoConstraints = false
            $0.clipsToBounds = true
        }
    }
    
    @objc func updateTabar(_ notification: NSNotification) {
        if let dict = notification.userInfo as NSDictionary? {
            if let id = dict["index"] as? Int{
                selectItem(index: id)
            }
        }
    }
    
    private func selectItem(index: Int) {
        customItemViews.forEach { $0.isSelected = $0.index == index }
        itemTappedSubject.onNext(index)
    }
    
    func getBeneficeriesNavigateName() -> Notification.Name {
        return Notification.Name.init(rawValue: AppConstants.tabbarItemChangeNotification)
    }

    
    //MARK: - Bindings
    private func bind() {
        homeItem.rx.tapGesture()
            .when(.recognized)
            .bind { [weak self] _ in
                guard let self = self else { return }
                self.homeItem.animateClick {
                    self.selectItem(index: self.homeItem.index)
                }
            }
            .disposed(by: disposeBag)
        
        sendItem.rx.tapGesture()
            .when(.recognized)
            .bind { [weak self] _ in
                guard let self = self else { return }
                self.sendItem.animateClick {
                    self.selectItem(index: self.sendItem.index)
                }
            }
            .disposed(by: disposeBag)
        
        profileItem.rx.tapGesture()
            .when(.recognized)
            .bind { [weak self] _ in
                guard let self = self else { return }
                self.profileItem.animateClick {
                    self.selectItem(index: self.profileItem.index)
                }
            }
            .disposed(by: disposeBag)
    }
}