//
//  ChatModePickInsufficientCoinSheet.swift
//  Crush
//
//  Created by Leon on 2025/9/23.
//
import UIKit
import Combine

/// 余额不足，对话模型选择
class ChatModePickInsufficientCoinSheet: EGPopBaseView {
    var closeButton: EPIconTertiaryButton!
    var titleLabel: UILabel!
    var subTitleLabel: LineSpaceLabel!
    
    // 滚动视图
    var scrollView: UIScrollView!
    
    // 模型卡片视图数组
    var modelCardViews: [ChatModelCardView] = []
    
    var bottomView: UIView!
    var balance: CLIconLabel!
    var operateButton: StyleButton! // Recharge
    
    // 数据源
    private var chatModels: [AIChatModel] = []
    private var currentSelectedModelCode: String?
    
    var cardHeight = 168.0
    // 选择回调
    var selectionCallback: ChatModelSelectionCallback?
    
    private var cancellables = Set<AnyCancellable>()
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    init(currentSelectedModelCode: String? = nil) {
        self.currentSelectedModelCode = currentSelectedModelCode
        super.init(direction: .bottom)
        
        contentView.backgroundColor = .c.csbn
        // 初始高度，后续会根据数据动态调整
        contentLength = 200 + UIWindow.safeAreaBottom
        
        setupViews()
        setupDatas()
        setupEvent()
    }
    
    private func setupViews() {
        closeButton = {
            let v = EPIconTertiaryButton(radius: .round, iconSize: .small, iconCode: .delete)
            v.addTarget(self, action: #selector(bgButtonPressed), for: .touchUpInside)
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.top.equalToSuperview().offset(20)
                make.size.equalTo(v.bgImageSize())
                make.trailing.equalToSuperview().offset(-16)
            }
            return v
        }()
        
        titleLabel = {
            let v = UILabel()
            v.font = .t.ttm
            v.textColor = .text
            v.textAlignment = .center
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview().offset(24)
                make.trailing.equalToSuperview().offset(-24)
                make.top.equalToSuperview().offset(32)
            }
            return v
        }()
        
        subTitleLabel = {
            let v = LineSpaceLabel()
            let typo = CLSystemToken.typography(token: .tbs)
            v.config(typo)
            v.textColor = .c.ctpn
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.top.equalTo(titleLabel.snp.bottom).offset(24)
                make.leading.equalToSuperview().offset(CGFloat.lrs)
                make.trailing.equalToSuperview().offset(-CGFloat.lrs)
            }
            return v
        }()
        
        scrollView = {
            let v = UIScrollView()
            v.showsVerticalScrollIndicator = false
            v.showsHorizontalScrollIndicator = false
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview()
                make.trailing.equalToSuperview()
                make.top.equalTo(subTitleLabel.snp.bottom).offset(16) // 24
                make.height.equalTo(cardHeight) // 每个卡片的高度
            }
            return v
        }()
        
        bottomView = {
            let v = UIView()
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.bottom.equalToSuperview().offset(-UIWindow.safeAreaBottom)
                make.leading.trailing.equalToSuperview()
                make.height.equalTo(80)
            }
            return v
        }()
        
        balance = {
            let v = CLIconLabel()
            v.iconSize = CGSize(width: 16, height: 16)
            v.iconImageView.image = .icon16Diamond
            v.contentLabel.textColor = .white
            v.contentLabel.font = .t.tlm
            bottomView.addSubview(v)
            v.snp.makeConstraints { make in
                make.centerY.equalToSuperview()
                make.leading.equalToSuperview().offset(24)
            }
            return v
        }()
        
        operateButton = {
            let v = StyleButton()
            v.primary(size: .large)
            v.addTarget(self, action: #selector(operateButtonTapped), for: .touchUpInside)
            bottomView.addSubview(v)
            v.snp.makeConstraints { make in
                make.centerY.equalToSuperview()
                make.trailing.equalToSuperview().offset(-24)
                make.leading.greaterThanOrEqualTo(balance.snp.trailing).offset(48)
            }
            return v
        }()
        
        titleLabel.text = "Dialog Model"
        subTitleLabel.text = "The Crush coin is insufficient and cannot continue to send messages. The charging standard of the current model："
        operateButton.setTitle("Recharge", for: .normal)
        
        
    }
    
    private func setupDatas(){
//        let group = DispatchGroup()
//        
//        group.enter()
        loadChatModels {
//            group.leave()
        }
        
//        group.enter()
//        loadChatSetting {
//            group.leave()
//        }
//        
//        group.notify(queue: .main) {[weak self] in
//            self?.setupModelCards()
//        }
    }
    
    private func setupEvent(){
        WalletCore.shared.$balance.sink {[weak self] balance in
            if let priceLabel = self?.balance {
                priceLabel.contentLabel.text = balance.displayBalance()
            }
        }.store(in: &cancellables)
    }
    
    private func loadChatModels(completion:(()->Void)? = nil) {
        guard let models = AppDictManager.shared.chatModels, models.count > 0 else {
            // 如果没有数据，尝试加载
            AppDictManager.shared.loadChatModelDict { [weak self] success in
                if success {
                    self?.loadChatModels()
                }
            }
            return
        }
        
        chatModels = models
        setupModelCards()
        completion?()
    }
    
    private func setupModelCards() {
        // 清除之前的卡片
        modelCardViews.forEach { $0.removeFromSuperview() }
        modelCardViews.removeAll()
        
        // 创建新的卡片
        for (index, model) in chatModels.enumerated() {
            let cardView = ChatModelCardView()
            cardView.configure(with: model, isSelected: model.code == currentSelectedModelCode)
            cardView.tag = index
            cardView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(modelCardTapped(_:))))
            
            scrollView.addSubview(cardView)
            modelCardViews.append(cardView)
            
            cardView.snp.makeConstraints { make in
                make.leading.trailing.equalToSuperview()
                make.width.equalTo(scrollView.snp.width)
                make.height.equalTo(cardHeight) // 每个卡片固定高度
                if index == 0 {
                    make.top.equalToSuperview()
                } else {
                    make.top.equalTo(modelCardViews[index - 1].snp.bottom).offset(12)
                }
                if index == chatModels.count - 1 {
                    make.bottom.equalToSuperview()
                }
            }
        }
        
        // 动态调整contentLength
        updateContentLength()
        
        // 延迟执行滚动操作，确保视图布局完成
//        DispatchQueue.main.async { [weak self] in
//            self?.scrollToSelectedModel()
//        }
    }
    
    private func updateContentLength() {
        let subTitleHeight = subTitleLabel.sizeThatFits(CGSize(width: UIScreen.width - CGFloat.lrs*2, height: CGFLOAT_MAX)).height
        //dlog("文字高度： \(subTitleHeight)")
        // 基础高度：标题 + 间距 + 底部标签
        let baseHeight: CGFloat = 80 + subTitleHeight + 80 + 16// titleLabel top + spacing + stayTunedLabel + bottom margin
        
        // 卡片高度：每个卡片200 + 间距12（除了最后一个）
        let cardHeight: CGFloat = cardHeight
        let cardSpacing: CGFloat = 12
        let totalCardHeight = CGFloat(chatModels.count) * cardHeight + CGFloat(max(0, chatModels.count - 1)) * cardSpacing
        
        // 滚动视图高度：根据卡片数量调整，最多显示2个卡片的高度
        let maxVisibleHeight = min(totalCardHeight, cardHeight * 2 + cardSpacing)
        
        // 更新scrollView高度约束
        scrollView.snp.updateConstraints { make in
            make.height.equalTo(maxVisibleHeight)
        }
        
        // 更新contentLength
        contentLength = baseHeight + maxVisibleHeight + UIWindow.safeAreaBottom
        
        // 更新布局
        layoutIfNeeded()
    }
    
    // MARK: - Function
    private func scrollToSelectedModel() {
        guard let selectedCode = currentSelectedModelCode,
              let selectedIndex = chatModels.firstIndex(where: { $0.code == selectedCode }),
              selectedIndex < chatModels.count else { return }
        
        // 确保scrollView已经有正确的frame
        guard scrollView.frame.height > 0 else {
            // 如果frame还没有设置，再次延迟执行
            DispatchQueue.main.async { [weak self] in
                self?.scrollToSelectedModel()
            }
            return
        }
        
        let offsetY = CGFloat(selectedIndex) * (cardHeight + 12) // 卡片高度 + 间距
        scrollView.setContentOffset(CGPoint(x: 0, y: offsetY), animated: false)
    }
    
    // MARK: - Action
    @objc private func modelCardTapped(_ gesture: UITapGestureRecognizer) {
        guard let cardView = gesture.view as? ChatModelCardView,
              let index = modelCardViews.firstIndex(of: cardView),
              index < chatModels.count else { return }
        
        let selectedModel = chatModels[index]
        
        modelCardViews.forEach { $0.setSelected(false) }
        cardView.setSelected(true)
        
        // 调用回调
        selectionCallback?(selectedModel)
        
        IMAIViewModel.shared.updateChatModel(code: selectedModel.code, completion: nil)
        
        // 关闭弹窗
        dismiss()
    }
    
    @objc private func operateButtonTapped(){
        dismiss()
        AppRouter.goWalletCenter()
    }
}