//
//  MOGiftBottomMenuView.swift
//  MiMoLive
//
//  Created by OneeChan on 2025/9/5.
//

import Foundation
import UIKit
import SnapKit

@objc protocol MOGiftBottomMenuViewDelegate {
    // Recharge
    func giftBottomMenuViewClickRecharge(view: MOGiftBottomMenuView)
    
    // Gift
    func giftBottomMenuViewDidSelectNum(view: MOGiftBottomMenuView, num: Int, isCustom: Bool)
    func giftBottomMenuViewClickSendGift(view: MOGiftBottomMenuView)
    func giftBottomMenuViewClickCustom(view: MOGiftBottomMenuView)
    
    // Bag
    func giftBottomMenuViewClickSendBag(view: MOGiftBottomMenuView)
    
    // Props
    func giftBottomMenuViewClickUse(view: MOGiftBottomMenuView)
}

@objcMembers
class MOGiftBottomMenuView: UIView {
    weak var delegate: MOGiftBottomMenuViewDelegate?
    
    @objc enum GiftBottomMenuType: Int {
        case none
        case gift
        case bag
        case props
    }
    private var curType: GiftBottomMenuType = .gift
    
    private var giftView: UIView?
    private var diamondLabel: UILabel?
    private var sendGiftView: MOSendGiftView?
    
    private var bagView: UIView?
    
    private var propView: UIView?
    private var usePropButon: MOGiftGradientButton?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupViews()
        updateViewType(curType)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    func updateSelectItem(_ item: Any?) {
        guard let item else {
            updateViewType(.none)
            return
        }
        if let item = item as? MOGiftlist {
            if item.isBag {
                updateViewType(.bag)
            } else {
                enableGiftSendView(true)
                updateViewType(.gift)
            }
        } else if let item = item as? MOShopList {
            updateViewType(.props)
            if item.used {
                usePropButon?.title = NSLocalizedString("mimo_2_gift_list_prpps_a_use", comment: "")
            } else {
                usePropButon?.title = NSLocalizedString("mimo_2_gift_list_prpps_use", comment: "")
            }
        } else {
            updateViewType(.none)
        }
    }
    
    func updateViewType(_ type: GiftBottomMenuType) {
        curType = type

        let showView: UIView? = switch type {
        case .none:
            nil
        case .gift:
            self.giftView
        case .bag:
            self.bagView
        case .props:
            self.propView
        }
        let showings = [self.giftView, self.bagView, self.propView]
            .filter { $0?.isHidden == false && $0 != showView }
        showings.forEach { $0?.isHidden = true }
        
        // 已经在展示，不需要调整
        if showView?.isHidden == false { return }
        showView?.isHidden = false
    }
    
    func updateUserDiamond(_ count: Double) {
        var zuanNumStr = ""
        if count < 10_000_000 { // 1千万以下
            zuanNumStr = String(format: "%.f", count)
        } else if count < 1_000_000_000 { // 1千万到10亿
            let firstTwoDigits = Int(count / 10_000)
            zuanNumStr = String(
                format: "%ld.%02ldM",
                firstTwoDigits / 100,
                firstTwoDigits % 100
            )
        } else { // 10亿以上
            let firstTwoDigits = Int(count / 10_000_000)
            zuanNumStr = String(
                format: "%ld.%02ldB",
                firstTwoDigits / 100,
                firstTwoDigits % 100
            )
        }
        diamondLabel?.text = "\(zuanNumStr)"
    }
    
    func selectGiftNum(_ num: Int) {
        sendGiftView?.updateGiftNum(num)
    }
    
    func curGiftNum() -> Int {
        sendGiftView?.curGiftNum() ?? 1
    }
    
    func enableGiftSendView(_ enable: Bool) {
        sendGiftView?.isHidden = !enable
    }
    
    func enableGiftNum(_ enable: Bool) {
        sendGiftView?.enableGiftNum(enable)
    }
    
    func updateCustomNum(_ num: Int) {
        sendGiftView?.updateCustomNum(num)
    }
}

// MARK: Private
extension MOGiftBottomMenuView {
}

// MARK: UI 事件
extension MOGiftBottomMenuView {
    @objc func handleRechargeButtonClick() {
        delegate?.giftBottomMenuViewClickRecharge(view: self)
    }
    
    @objc func handleSendBagButtonClick() {
        delegate?.giftBottomMenuViewClickSendBag(view: self)
    }
    
    @objc func handleUsePropsButtonClick() {
        delegate?.giftBottomMenuViewClickUse(view: self)
    }
}

// MARK: MOSendGiftDelegate
extension MOGiftBottomMenuView: MOSendGiftViewDelegate {
    func sendGiftViewDidSelectNum(
        view: MOSendGiftView,
        num: Int,
        isCustom: Bool
    ) {
        delegate?
            .giftBottomMenuViewDidSelectNum(
                view: self,
                num: num,
                isCustom: isCustom
            )
    }
    
    func sendGiftViewClickSend(view: MOSendGiftView) {
        delegate?.giftBottomMenuViewClickSendGift(view: self)
    }
    
    func sendGiftViewClickCustom(view: MOSendGiftView) {
        delegate?.giftBottomMenuViewClickCustom(view: self)
    }
}

// MARK: UI 视图构建
extension MOGiftBottomMenuView {
    // UI 组装
    private func setupViews() {
        let giftView = buildGiftMenuView()
        giftView.isHidden = true
        addSubview(giftView)
        giftView.snp.makeConstraints { make in
            make.leading.trailing.bottom.equalToSuperview()
            make.top.bottom.equalToSuperview()
        }
        self.giftView = giftView
        
        let bagView = buildBagMenuView()
        bagView.isHidden = true
        addSubview(bagView)
        bagView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        self.bagView = bagView
        
        let propsView = buildPropsMenuView()
        propsView.isHidden = true
        addSubview(propsView)
        propsView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        self.propView = propsView
    }
    
    // Gift Menu
    private func buildGiftMenuView() -> UIView {
        let container = UIView()
        
        let diamondView = buildDiamondView()
        container.addSubview(diamondView)
        diamondView.snp.makeConstraints { make in
            make.top.bottom.equalToSuperview()
            make.leading.equalToSuperview().offset(12)
        }
        
        let sendView = MOSendGiftView()
        sendView.delegate = self
        container.addSubview(sendView)
        sendView.snp.makeConstraints { make in
            make.top.bottom.equalToSuperview()
            make.trailing.equalToSuperview().offset(-12)
            make.leading.equalTo(diamondView.snp.trailing).offset(8)
        }
        self.sendGiftView = sendView
        
        return container
    }
    
    // 钻石界面
    private func buildDiamondView() -> UIView {
        let container = UIView()
        container.layer.cornerRadius = 10
        container.backgroundColor = .white.withAlphaComponent(0.15)
        
        let diamond = UIImageView()
        diamond.image = UIImage(named: "icon_gift_zuan")
        container.addSubview(diamond)
        diamond.snp.makeConstraints { make in
            make.top.equalToSuperview().offset(7)
            make.bottom.equalToSuperview().offset(-7)
            make.leading.equalToSuperview().offset(10)
            make.width.height.equalTo(14)
        }
        
        let label = UILabel()
        label.textColor = .white
        label.font = MOTextTools.mediumFont(12.0)
        container.addSubview(label)
        label.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.leading.equalTo(diamond.snp.trailing).offset(3)
        }
        self.diamondLabel = label
        
        let arrow = UIImageView()
        arrow.image = UIImage(named: "icon_arrow_right_gray")
        container.addSubview(arrow)
        arrow.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.leading.equalTo(label.snp.trailing).offset(5)
            make.trailing.equalToSuperview().offset(-10)
        }
        
        let button = UIButton()
        button
            .addTarget(
                self,
                action: #selector(handleRechargeButtonClick),
                for: .touchUpInside
            )
        container.addSubview(button)
        button.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        
        return container
    }
    
    // Bag View
    private func buildBagMenuView() -> UIView {
        let container = UIView()
        
        let send = MOGiftGradientButton()
        send
            .addTarget(
                self,
                action: #selector(handleSendBagButtonClick),
                for: .touchUpInside
            )
        send.title = "Send"
        container.addSubview(send)
        send.snp.makeConstraints { make in
            make.top.bottom.equalToSuperview()
            make.trailing.equalToSuperview().offset(-12)
        }
        
        return container
    }
    
    // Props View
    private func buildPropsMenuView() -> UIView {
        let container = UIView()
        
        let use = MOGiftGradientButton()
        use.addTarget(
            self,
            action: #selector(handleUsePropsButtonClick),
            for: .touchUpInside
        )
        use.title = "Use"
        container.addSubview(use)
        use.snp.makeConstraints { make in
            make.top.bottom.equalToSuperview()
            make.trailing.equalToSuperview().offset(-12)
        }
        self.usePropButon = use
        
        return container
    }
}

private class MOGiftGradientButton: UIButton {
    var title = "" {
        didSet {
            textLabel.text = title
        }
    }
    private let gradientLayer = CAGradientLayer()
    private let textLabel = UILabel()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupViews()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        CATransaction.begin()
        CATransaction.setDisableActions(true)
        layer.sublayers?.forEach({ layer in
            if layer is CAGradientLayer {
                layer.frame = bounds
            }
        })
        CATransaction.commit()
    }
    
    private func setupViews() {
        let graLayer = CAGradientLayer()
        graLayer.startPoint = CGPoint(x: 0, y: 0.5)
        graLayer.endPoint = CGPoint(x: 1, y: 0.5)
        graLayer.colors = [
            UIColor(
                red: 255/255.0,
                green: 77/255.0,
                blue: 166/255.0,
                alpha: 1
            ).cgColor,
            UIColor(
                red: 67/255.0,
                green: 99/255.0,
                blue: 255/255.0,
                alpha: 1
            ).cgColor
        ];
        graLayer.locations = [0, 1.0]
        layer.insertSublayer(graLayer, at: 0)
        layer.cornerRadius = 10
        layer.masksToBounds = true
        
        textLabel.text = "Use"
        textLabel.font = MOTextTools.mediumFont(12.0)
        textLabel.textColor = .white
        addSubview(textLabel)
        textLabel.snp.makeConstraints { make in
            make.edges
                .equalToSuperview()
                .inset(UIEdgeInsets(top: 6, left: 16, bottom: 6, right: 16))
        }
    }
}

//#if DEBUG
//import SwiftUI
//
//struct MOGiftBottomMenuViewPreview: UIViewRepresentable {
//    func makeUIView(context: Context) -> some UIView {
//        let container = UIView()
//        container.backgroundColor = .black
//
//        let view = MOGiftBottomMenuView()
//        container.addSubview(view)
//        view.snp.makeConstraints { make in
//            make.centerY.equalToSuperview()
//            make.leading.trailing.equalToSuperview()
//        }
//
//        return container
//    }
//
//    func updateUIView(_ uiView: UIViewType, context: Context) {
//
//    }
//}
//
//#Preview(body: {
//    VStack {
//        MOGiftBottomMenuViewPreview()
//    }
//})
//
//#endif