//
//  ChatModePickSheet.swift
//  Crush
//
//  Created by Leon on 2025/8/17.
//

import UIKit

/// 对话模型选择回调
typealias ChatModelSelectionCallback = (AIChatModel) -> Void

/// 对话模型选择
class ChatModePickSheet: EGPopBaseView {
    var closeButton: EPIconTertiaryButton!
    var titleLabel: UILabel!
    
    // 滚动视图
    var scrollView: UIScrollView!
    
    // 模型卡片视图数组
    var modelCardViews: [ChatModelCardView] = []
    
    var stayTunedLabel: CLLabel!
    
    // 数据源
    private var chatModels: [AIChatModel] = []
    private var currentSelectedModelCode: String?
    
    var cardHeight = 200.0//168.0
    // 选择回调
    var selectionCallback: ChatModelSelectionCallback?
    
    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()
        loadChatModels()
    }
    
    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
        }()
        
        scrollView = {
            let v = UIScrollView()
            v.showsVerticalScrollIndicator = false
            v.showsHorizontalScrollIndicator = false
            v.delegate = self
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview()
                make.trailing.equalToSuperview()
                make.top.equalTo(titleLabel.snp.bottom).offset(24)
                make.height.equalTo(cardHeight) // 每个卡片的高度
            }
            return v
        }()
        
        stayTunedLabel = {
            let v = CLLabel()
            v.font = .t.tbs
            v.textColor = .c.ctsn
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview().offset(24)
                make.top.equalTo(scrollView.snp.bottom).offset(16)
            }
            return v
        }()
        
        titleLabel.text = "Dialog Model"
        stayTunedLabel.text = "Stay tuned for more models"
    }
    
    private func loadChatModels() {
        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()
    }
    
    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() {
        // 基础高度：标题 + 间距 + 底部标签
        let baseHeight: CGFloat = 32 + 24 + 16 + 20  + UIWindow.safeAreaBottom// 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()
    }
    
    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)
    }
    
    @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]
        
        // 更新选中状态
        modelCardViews.forEach { $0.setSelected(false) }
        cardView.setSelected(true)
        
        // 调用回调
        selectionCallback?(selectedModel)
        
        // 关闭弹窗
        dismiss()
    }
}

// MARK: - UIScrollViewDelegate
extension ChatModePickSheet: UIScrollViewDelegate {
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        // 垂直滚动不需要页面指示器逻辑
    }
}

// MARK: - ChatModelCardView
class ChatModelCardView: UIView {
    private var block: UIView!
    private var modelName: UILabel!
    private var modelDesc: UILabel!
    private var selectMark: UIImageView!
    private var innerBlock: UIView!
    private var queryButton: EPIconTertiaryButton!
    private var priceStackView: UIStackView!
    
    private var model: AIChatModel?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupViews()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setupViews() {
        block = {
            let v = UIView()
            v.backgroundColor = .c.csen
            v.cornerRadius = 16
            addSubview(v)
            v.snp.makeConstraints { make in
//                make.edges.equalToSuperview()
                make.leading.equalToSuperview().offset(24)
                make.trailing.equalToSuperview().offset(-24)
                make.top.bottom.equalToSuperview()
            }
            return v
        }()
        
        selectMark = {
            let v = UIImageView()
            v.image = UIImage(named: "checkmark_tick")
            v.isHidden = true
            block.addSubview(v)
            v.snp.makeConstraints { make in
                make.size.equalTo(CGSize(width: 20, height: 20))
                make.top.equalToSuperview().offset(18)
                make.trailing.equalToSuperview().offset(-16)
            }
            return v
        }()
        
        modelName = {
            let v = CLLabel()
            v.font = .t.tts
            v.setContentCompressionResistancePriority(UILayoutPriority(749), for: .horizontal)
            block.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview().offset(16)
                make.top.equalToSuperview().offset(16)
                make.trailing.lessThanOrEqualTo(selectMark.snp.leading).offset(-8)
            }
            return v
        }()
        
        queryButton = {
            let v = EPIconTertiaryButton(radius: .round, iconSize: .xs10, iconCode: .question)
            v.addTarget(self, action: #selector(tapQueryButton), for: .touchUpInside)
            block.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalTo(modelName.snp.trailing).offset(4)
                make.centerY.equalTo(modelName)
                make.trailing.lessThanOrEqualToSuperview().offset(-16)
            }
            return v
        }()
        
        modelDesc = {
            let v = CLLabel()
            v.font = .t.tbs
            v.textColor = .c.ctsn
            block.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview().offset(16)
                make.trailing.equalToSuperview().offset(-16)
                make.top.equalTo(modelName.snp.bottom).offset(4)
            }
            return v
        }()
        
        innerBlock = {
            let v = UIView()
            v.backgroundColor = .c.csdn
            v.cornerRadius = 12
            block.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview().offset(16)
                make.trailing.equalToSuperview().offset(-16)
                //make.top.equalTo(modelDesc.snp.bottom).offset(12)
                make.top.equalToSuperview().offset(76)
                make.height.equalTo(108) // 76
                //make.bottom.equalToSuperview().offset(-16)
            }
            return v
        }()

        priceStackView = {
            let v = UIStackView()
            v.axis = .vertical
            v.spacing = 12
            v.alignment = .leading
            innerBlock.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.equalToSuperview().offset(12)
                make.trailing.equalToSuperview().offset(-12)
                make.top.equalToSuperview().offset(12)
                make.bottom.equalToSuperview().offset(-12)
            }
            return v
        }()
    }
    
    func configure(with model: AIChatModel, isSelected: Bool = false) {
        self.model = model
        
        modelName.text = model.name ?? ""
        modelDesc.text = model.description ?? ""
        
        // 清除之前的价格标签
        priceStackView.arrangedSubviews.forEach { $0.removeFromSuperview() }
        
        // 添加价格信息
        if let price = model.textPrice {
            let coin = Coin(cents: price)
            let priceLabel = CLIconLabel()
            priceLabel.iconImageView.image = UIImage(named: "icon_16_diamond")
            priceLabel.contentLabel.text = "\(coin.thousandthsFormatted)/Text Message"
            priceStackView.addArrangedSubview(priceLabel)
        }
        
        if let price = model.voicePrice {
            let coin = Coin(cents: price)
            let priceLabel = CLIconLabel()
            priceLabel.iconImageView.image = UIImage(named: "icon_16_diamond")
            priceLabel.contentLabel.text = "\(coin.thousandthsFormatted)/Send or play voice"
            priceStackView.addArrangedSubview(priceLabel)
        }
        
        if let price = model.voiceChatPrice {
            let coin = Coin(cents: price)
            let priceLabel = CLIconLabel()
            priceLabel.iconImageView.image = UIImage(named: "icon_16_diamond")
            priceLabel.contentLabel.text = "\(coin.thousandthsFormatted)/ 1 min Voice call"
            priceStackView.addArrangedSubview(priceLabel)
        }
        
        setSelected(isSelected)
    }
    
    func setSelected(_ selected: Bool) {
        selectMark.isHidden = !selected
//        block.layer.borderWidth = selected ? 2 : 0
//        block.layer.borderColor = selected ? UIColor.c.cpn.cgColor : UIColor.clear.cgColor
    }
    
    @objc func tapQueryButton(){
        let content = "*文本消息价格是指与角色进行文本消息对话的价格，含发送文本，发送图片，发送礼物；按条计算\n\n*发送语音消息价格是指与角色发送语音或者播放角色的语音的价格；按次计算\n\n*语音通话消息价格是指与角色进行语音电话对话的价格；按分钟计算"
        let alert = Alert(title: "Tips", text: content)
        let action1 = AlertAction(title: "Got it", actionStyle: .confirm) {
            
        }
        alert.addAction(action1)
        alert.show()
    }
}