//
//  GroupMemberListView.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/29.
//

import UIKit
import RxSwift
import RxCocoa

class GroupMemberListView: UIView {
    
    var disposeBag = DisposeBag()
    
    func updateArrowVisibility() {
        let offsetX = collectionView.contentOffset.x
        let contentW = collectionView.contentSize.width
        let viewW = collectionView.bounds.width
        memberArrowLeft.isHidden = offsetX <= 0
        memberArrowRight.isHidden = offsetX >= contentW - viewW
    }
    
    private func setupRx() {
        backBtn.rx.tap.subscribe(onNext: { _ in
            AppRouter.shared.popOrDismiss()
        }).disposed(by: disposeBag)

        collectionView.rx.contentOffset
            .subscribe(onNext: { [weak self] _ in
                self?.updateArrowVisibility()
            })
            .disposed(by: disposeBag)

        // 选中日期变化时更新月份
        selectedDate.subscribe(onNext: { [weak self] date in
            guard let self = self else { return }
            let fmt = DateFormatter()
            fmt.dateFormat = "MM月"
            self.monthLab.text = fmt.string(from: date)
        }).disposed(by: disposeBag)

        // 往前/往后翻 7 天
        datePreviousBtn.rx.tap.subscribe(onNext: { [weak self] _ in
            guard let self = self else { return }
            let target = self.dateCollectionView.contentOffset.x - self.dateItemWidth * CGFloat(self.daysPerPage)
            self.dateCollectionView.setContentOffset(CGPoint(x: max(0, target), y: 0), animated: true)
        }).disposed(by: disposeBag)

        dateNextBtn.rx.tap.subscribe(onNext: { [weak self] _ in
            guard let self = self else { return }
            var target = self.dateCollectionView.contentOffset.x + self.dateItemWidth * CGFloat(self.daysPerPage)
            let maxOffset = CGFloat(self.dateItems.count) * self.dateItemWidth - self.dateCollectionView.bounds.width
            target = min(max(0, maxOffset), target)
            self.dateCollectionView.setContentOffset(CGPoint(x: target, y: 0), animated: true)
        }).disposed(by: disposeBag)
    }
    
    private func setupUI() {
        addSubview(navBgView)
        addSubview(navBarView)
        navBarView.addSubview(navTitleLabel)
        navBarView.addSubview(backBtn)
        
        addSubview(memberArrowLeft)
        addSubview(collectionView)
        addSubview(memberArrowRight)
        addSubview(reportView)
        
        navBgView.layoutChain
            .edges(excludingEdge: .bottom)
            .heightToWidth(160/375)
        
        navBarView.layoutChain
            .edges(excludingEdge: .bottom)
            .height(kNaviHeight)
        
        navTitleLabel.layoutChain
            .top(kStatusBarHeight + 12)
            .centerY(backBtn)
            .centerX()
        
        backBtn.layoutChain
            .centerY(navTitleLabel)
            .left(15)
            .width(24)
            .height(24)
        
        collectionView.layoutChain
            .topToBottomOfView(navBarView, offset: 0)
            .height(90)
            .edgesHorzontal(28)
        
        memberArrowLeft.layoutChain
            .rightToLeftOfView(collectionView, offset: -8)
            .height(14)
            .width(5)
            .centerY(collectionView)
        
        memberArrowRight.layoutChain
            .leftToRightOfView(collectionView, offset: 8)
            .height(14)
            .width(5)
            .centerY(collectionView)
        
        reportView.layoutChain
            .topToBottomOfView(collectionView, offset: 10)
            .edges(excludingEdge: .top)
    }
    
    lazy var navBgView: UIImageView = {
        let iv = UIImageView()
        iv.image = UIImage(named: "Common/navBar_bg_2")
        iv.contentMode = .scaleAspectFill
        return iv
    }()
    
    lazy var navBarView: UIView = {
        let view = UIView()
        view.backgroundColor = .clear
        return view
    }()
    
    lazy var navTitleLabel: UILabel = {
        let label = UILabel()
        label.text = "圈子成员"
        label.font = .systemFont(ofSize: 18, weight: .medium)
        label.textColor = ThemeManager.shared.color.titleAuxColor
        label.textAlignment = .center
        return label
    }()
    
    lazy var backBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setImage(UIImage(named: "Common/back"), for: .normal)
        btn.extendEdgeInsets = UIEdgeInsets(top: 54, left: 15, bottom: 100, right: 100)
        return btn
    }()
    
    // MARK: - 成员列表
    lazy var memberArrowLeft: UIImageView = {
        let view = UIImageView()
        view.image = UIImage(named: "GroupMemberList/member_left")
        view.isHidden = true
        return view
    }()
    
    lazy var memberArrowRight: UIImageView = {
        let view = UIImageView()
        view.image = UIImage(named: "GroupMemberList/member_right")
        view.isHidden = true
        return view
    }()
    
    lazy var collectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        let cvWidth = kScreenWidth - 56
        layout.itemSize = CGSize(width: 65, height: 90)
        layout.minimumLineSpacing = 4
        layout.scrollDirection = .horizontal
        
        let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
        cv.backgroundColor = .clear
        cv.showsHorizontalScrollIndicator = false
        cv.register(GroupMemberListCell.self)
        return cv
    }()
    
    // MARK: - 报告
    lazy var reportView: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hexStr: "#F5FBFF")
        view.layer.cornerRadius = 20
        view.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        
        let monthView = UIView()
        monthView.backgroundColor = UIColor(hexStr: "#57C7FF")
        monthView.cornerRadius = 6
        monthView.addSubview(monthLab)
        monthLab.layoutChain
            .edgesVertical(2)
            .edgesHorzontal(12)
        view.addSubview(monthView)
        monthView.layoutChain
            .top(15)
            .left(15)
        
        let totalLab = UILabel()
        totalLab.text = "本周总计里程"
        totalLab.font = .systemFont(ofSize: 10, weight: .medium)
        totalLab.textColor = UIColor(hexStr: "#333333")
        view.addSubview(totalLab)
        totalLab.layoutChain
            .leftToRightOfView(monthView, offset: 21)
            .centerY(monthView)
        view.addSubview(mileageLab)
        mileageLab.layoutChain
            .leftToRightOfView(totalLab, offset: 5)
            .centerY(monthView)
        
        let highLab = UILabel()
        highLab.text = "本周最高时速"
        highLab.font = .systemFont(ofSize: 10, weight: .medium)
        highLab.textColor = UIColor(hexStr: "#333333")
        view.addSubview(highLab)
        highLab.layoutChain
            .leftToRightOfView(mileageLab, offset: 23)
            .centerY(monthView)
        view.addSubview(speedLab)
        speedLab.layoutChain
            .leftToRightOfView(highLab, offset: 5)
            .centerY(monthView)
        
        view.addSubview(dateView)
        dateView.layoutChain
            .topToBottomOfView(monthView, offset: 10)
            .edgesHorzontal()
        
        view.addSubview(scrollView)
        scrollView.layoutChain
            .topToBottomOfView(dateView)
            .edges(excludingEdge: .top)
        
        return view
    }()
    
    lazy var monthLab: UILabel = {
        let label = UILabel()
        label.text = " "
        label.font = .systemFont(ofSize: 14, weight: .medium)
        label.textColor = UIColor(hexStr: "#0F2846")
        label.textAlignment = .center
        return label
    }()
    
    /// 里程
    lazy var mileageLab: UILabel = {
        let label = UILabel()
        label.text = "0km"
        label.font = .systemFont(ofSize: 16, weight: .medium)
        label.textColor = UIColor(hexStr: "#16B3FF")
        return label
    }()
    
    /// 速度
    lazy var speedLab: UILabel = {
        let label = UILabel()
        label.text = "0km/h"
        label.font = .systemFont(ofSize: 16, weight: .medium)
        label.textColor = UIColor(hexStr: "#16B3FF")
        return label
    }()
    
    // MARK: - 日期
    private var dateItems: [DateItem] = []
    let selectedDate = BehaviorRelay<Date>(value: Date())
    private let daysPerPage = 7

    /// 当前选中的成员是否是自己
    var selectedMemberIsSelf = true {
        didSet { updateDateSelectability() }
    }

    struct DateItem {
        let date: Date
        let day: Int
        let isToday: Bool
        let isFuture: Bool
        let isSelectable: Bool
    }

    /// 根据 VIP 和成员关系计算最大可查询天数
    private var maxSelectableDays: Int {
        switch AppContextManager.shared.vip {
        case 1:  return 0       // 非会员不可点
        case 2:  return selectedMemberIsSelf ? 7 : 1
        case 3:  return selectedMemberIsSelf ? 30 : 14
        default: return 0
        }
    }

    /// 重新设置 dateItems 的 isSelectable
    private func updateDateSelectability() {
        let calendar = Calendar.current
        let today = Date()
        let maxDays = maxSelectableDays
        dateItems = dateItems.map { item in
            let daysAgo = calendar.dateComponents([.day], from: item.date, to: today).day ?? 0
            return DateItem(date: item.date, day: item.day, isToday: item.isToday,
                            isFuture: item.isFuture,
                            isSelectable: maxDays > 0 && !item.isFuture && daysAgo <= maxDays - 1)
        }
        dateCollectionView.reloadData()
    }

    private func generateDateItems() {
        let calendar = Calendar.current
        let today = Date()
        // 31 天前 → 今天 → 之后 3 天 = 35 天，正好 5 页 × 7 天
        let pastDays = 31
        let futureDays = 3
        let totalDays = pastDays + 1 + futureDays  // 35

        dateItems = (0..<totalDays).map { i in
            let offset = i - pastDays
            let date = calendar.date(byAdding: .day, value: offset, to: today) ?? today
            let day = calendar.component(.day, from: date)
            let isFuture = date > today
            let daysAgo = calendar.dateComponents([.day], from: date, to: today).day ?? 0
            return DateItem(date: date, day: day,
                            isToday: calendar.isDateInToday(date),
                            isFuture: isFuture,
                            isSelectable: maxSelectableDays > 0 && !isFuture && daysAgo <= maxSelectableDays - 1)
        }
    }

    /// 日期
    lazy var dateView: UIView = {
        let view = UIView()
        view.backgroundColor = .clear

        generateDateItems()

        view.addSubview(datePreviousBtn)
        view.addSubview(dateNextBtn)
        view.addSubview(dateCollectionView)

        datePreviousBtn.layoutChain
            .left(15)
            .edgesVertical(10)
            .width(20)
            .height(20)

        dateNextBtn.layoutChain
            .right(15)
            .centerY()
            .width(20)
            .height(20)

        dateCollectionView.layoutChain
            .leftToRightOfView(datePreviousBtn, offset: 5)
            .rightToLeftOfView(dateNextBtn, offset: -5)
            .edgesVertical()

        // 直接翻到最后一页（第 4 页，index 28 开始），今天在第 3 位
        DispatchQueue.main.async {
            let page: CGFloat = 4  // 第 5 页，items 28-34
            let offset = page * CGFloat(self.daysPerPage) * self.dateItemWidth
            self.dateCollectionView.contentOffset.x = offset
        }

        return view
    }()

    private var dateItemWidth: CGFloat {
        let available = kScreenWidth - 15 - 20 - 5 - 5 - 20 - 15
        return floor(available / CGFloat(daysPerPage))
    }

    lazy var dateCollectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        layout.itemSize = CGSize(width: dateItemWidth, height: 40)
        layout.minimumLineSpacing = 0
        layout.scrollDirection = .horizontal
        layout.sectionInset = .zero

        let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
        cv.backgroundColor = .clear
        cv.showsHorizontalScrollIndicator = false
        cv.isPagingEnabled = true
        cv.register(DateCell.self)
        cv.dataSource = self
        cv.delegate = self
        return cv
    }()

    lazy var datePreviousBtn: UIButton = {
        let btn = UIButton()
        btn.setImage(UIImage(named: "GroupMemberList/date_left"), for: .normal)
        btn.extendEdgeInsets = UIEdgeInsets(top: 15, left: 15, bottom: 15, right: 0)
        return btn
    }()

    lazy var dateNextBtn: UIButton = {
        let btn = UIButton()
        btn.setImage(UIImage(named: "GroupMemberList/date_right"), for: .normal)
        btn.extendEdgeInsets = UIEdgeInsets(top: 15, left: 0, bottom: 15, right: 15)
        return btn
    }()
    
    // MARK: - 驾驶分析
    lazy var scrollView: UIScrollView = {
        let view = UIScrollView()
        view.backgroundColor = .clear
        view.showsVerticalScrollIndicator = false
        view.bounces = false
        view.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: kSafeBottomMargin, right: 0)
        
        let contentView = UIView()
        contentView.backgroundColor = .clear
        view.addSubview(contentView)
        contentView.layoutChain.edges().widthToView(view)
        
        contentView.addSubview(drivingAnalysisView)
        drivingAnalysisView.layoutChain
            .top(5)
            .edgesHorzontal(15)
            .height(249)
            .bottom(20)
        
        return view
    }()
    
    lazy var drivingAnalysisView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        view.cornerRadius = 10
        
        let titleBg = UIImageView(image: UIImage(named: "GroupMemberList/title_bg"))
        view.addSubview(titleBg)
        
        let titleLab = UILabel()
        titleLab.text = "驾驶分析"
        titleLab.font = .systemFont(ofSize: 16, weight: .medium)
        view.addSubview(titleLab)
        titleLab.layoutChain
            .top(15)
            .centerX()
        
        titleBg.layoutChain
            .centerX()
            .bottomToView(titleLab, offset: 5)
        
        view.addSubview(drivingEventCV)
        drivingEventCV.layoutChain
            .topToBottomOfView(titleBg, offset: 20)
            .edgesHorzontal()
            .bottom(20)
        
        return view
    }()
    
    lazy var drivingEventCV: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        layout.itemSize = CGSize(width: 66, height: 75)
        layout.minimumLineSpacing = 15
        layout.scrollDirection = .vertical
        layout.sectionInset = UIEdgeInsets(top: 0, left: 12, bottom: 0, right: 12)

        let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
        cv.backgroundColor = .clear
        cv.showsHorizontalScrollIndicator = false
        cv.isScrollEnabled = false
        cv.register(DrivingEventCell.self)
        return cv
    }()
    
    override func layoutSubviews() {
        super.layoutSubviews()
        updateArrowVisibility()
    }

    override init(frame: CGRect) {
        super.init(frame: .zero)
        backgroundColor = .white
        setupUI()
        setupRx()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

// MARK: - UICollectionViewDataSource & Delegate (日期)
extension GroupMemberListView: UICollectionViewDataSource, UICollectionViewDelegate {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        dateItems.count
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell: DateCell = collectionView.dequeueReusableCell(for: indexPath)
        let item = dateItems[indexPath.row]
        let isSel = Calendar.current.isDate(item.date, inSameDayAs: selectedDate.value)
        cell.configure(item: item, isSelected: isSel)
        return cell
    }

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        guard collectionView == dateCollectionView else { return }
        let item = dateItems[indexPath.row]
        guard item.isSelectable else { return }
        let oldDate = selectedDate.value
        selectedDate.accept(item.date)
        if let oldRow = dateItems.firstIndex(where: { Calendar.current.isDate($0.date, inSameDayAs: oldDate) }),
           let oldCell = dateCollectionView.cellForItem(at: IndexPath(row: oldRow, section: 0)) as? DateCell {
            oldCell.configure(item: dateItems[oldRow], isSelected: false)
        }
        if let newCell = dateCollectionView.cellForItem(at: indexPath) as? DateCell {
            newCell.configure(item: item, isSelected: true)
        }
    }

    func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
        guard scrollView == dateCollectionView else { return }
        let targetX = targetContentOffset.pointee.x
        let idx = round(targetX / dateItemWidth)
        targetContentOffset.pointee.x = idx * dateItemWidth
    }
}

// MARK: - DateCell
class DateCell: UICollectionViewCell {

    private let bgView: UIView = {
        let v = UIView()
        v.backgroundColor = UIColor(hexStr: "#16B3FF")
        v.cornerRadius = 11
        v.isHidden = true
        return v
    }()

    private let dayLab: UILabel = {
        let l = UILabel()
        l.font = .systemFont(ofSize: 14, weight: .medium)
        l.textAlignment = .center
        return l
    }()

    override init(frame: CGRect) {
        super.init(frame: frame)
        contentView.addSubview(bgView)
        contentView.addSubview(dayLab)
        bgView.layoutChain.centerX().centerY().width(36).height(22)
        dayLab.layoutChain.centerX().centerY()
    }

    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }

    func configure(item: GroupMemberListView.DateItem, isSelected: Bool) {
        dayLab.text = "\(item.day)"
        let disabled = item.isFuture || !item.isSelectable
        bgView.isHidden = !isSelected || disabled
        dayLab.textColor = disabled ? UIColor(hexStr: "#D1D1D6")
                         : isSelected ? .white
                         : UIColor(hexStr: "#333333")
    }
}

// MARK: - GroupMemberListCell
class GroupMemberListCell: UICollectionViewCell {
    
    func configure(model: GroupMemberModel, isCurrentUser: Bool, isSelected: Bool) {
        avaterImgView.image = model.userIcon
        vipIcon.image = model.vipIcon
        nameLab.text = model.nick_name
        nameLab.textColor = UIColor(hexStr: isCurrentUser ? "#16B3FF" : "#0F2846")
        selectedBgView.isHidden = !isSelected
        // 会员权益
        if AppContextManager.shared.vip > 1, model.is_online {
            batteryInfoView.isHidden = model.battery.int == 0
            // 电量  16是电池图标宽度，右边有电池造型需要减去
            let batteryPercent = min(CGFloat(model.battery.int), 100)
            batteryView.layoutChain.width(CGFloat(16 - 1) * batteryPercent / 100.0)
            batteryLab.text = "\(model.battery)%"
        }
    }
    
    private func setupSubviews() {
        contentView.addSubview(selectedBgView)
        contentView.addSubview(avaterImgView)
        contentView.addSubview(vipIcon)
        contentView.addSubview(batteryInfoView)
        batteryInfoView.addSubview(cornerView)
        cornerView.addSubview(batteryView)
        cornerView.addSubview(batteryIcon)
        cornerView.addSubview(batteryLab)
        contentView.addSubview(nameLab)
        
        setupLayout()
    }
    
    private func setupLayout() {
        selectedBgView.layoutChain.edges()
        
        avaterImgView.layoutChain
            .top(11)
            .edgesHorzontal(10)
            .heightToWidth(1)
        
        batteryInfoView.layoutChain
            .leftToView(avaterImgView)
            .rightToView(avaterImgView)
            .bottomToView(avaterImgView)
            .height(12)
        
        cornerView.layoutChain.edges()
        
        batteryIcon.layoutChain
            .left(7)
            .centerY()
            .width(16)
            .height(8)
        
        batteryView.layoutChain
            .topToView(batteryIcon)
            .leftToView(batteryIcon, offset: -1)
            .bottomToView(batteryIcon)
        
        batteryLab.layoutChain
            .leftToRightOfView(batteryIcon, offset: 4)
            .right(5)
            .centerY()
        
        vipIcon.layoutChain
            .topToView(avaterImgView, offset: -8)
            .leftToView(avaterImgView, offset: -6)
            .width(25)
            .height(21)
        
        nameLab.layoutChain
            .topToBottomOfView(batteryInfoView, offset: 4)
            .edgesHorzontal()
        
        
    }
    
    lazy var selectedBgView: UIImageView = {
        let view = UIImageView(image: UIImage(named: "GroupMemberList/selected_bg"))
        view.contentMode = .scaleAspectFill
        view.isHidden = true
        return view
    }()
    
    lazy var avaterImgView: UIImageView = {
        let view = UIImageView()
        view.backgroundColor = .lightGray
        view.contentMode = .scaleAspectFill
        view.cornerRadius = 25
        return view
    }()
    
    lazy var batteryInfoView: UIView = {
        let view = UIView()
        view.backgroundColor = .clear
        view.layer.shadowColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.1).cgColor
        view.layer.shadowOffset = CGSize(width: 0, height: 2)
        view.layer.shadowOpacity = 1
        view.layer.shadowRadius = 6
        view.isHidden = true
        return view
    }()
    
    lazy var cornerView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        view.cornerRadius = 6
        return view
    }()
    
    lazy var batteryView: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hexStr: "#75E582")
        return view
    }()
    
    lazy var batteryIcon: UIImageView = {
        let view = UIImageView()
        view.backgroundColor = .clear
        view.image = UIImage(named: "Home/battery")
        return view
    }()
    
    lazy var batteryLab: UILabel = {
        let label = UILabel()
        label.textColor = UIColor(hexStr: "#D4D4D4")
        label.font = .systemFont(ofSize: 6, weight: .medium)
        return label
    }()
    
    lazy var vipIcon: UIImageView = {
        let view = UIImageView()
        return view
    }()
    
    lazy var nameLab: UILabel = {
        let label = UILabel()
        label.textColor = UIColor(hexStr: "#0F2846")
        label.font = .systemFont(ofSize: 12, weight: .medium)
        label.textAlignment = .center
        return label
    }()
    
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupSubviews()
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

// MARK: - DrivingEventCell
class DrivingEventCell: UICollectionViewCell {

    func configure(_ item: DrivingEventItem) {
        iconView.image = UIImage(named: item.iconName)
        nameLab.text = "\(item.title)\n（\(item.count)）"
    }

    private let bgView: UIView = {
        let v = UIView()
        v.backgroundColor = UIColor(hexStr: "#F5FBFF")
        v.cornerRadius = 8
        return v
    }()
    
    lazy var iconView: UIImageView = {
        let view = UIImageView()
        view.contentMode = .scaleAspectFill
        return view
    }()

    lazy var nameLab: UILabel = {
        let l = UILabel()
        l.font = .systemFont(ofSize: 12, weight: .regular)
        l.textAlignment = .center
        l.numberOfLines = 0
        return l
    }()

    override init(frame: CGRect) {
        super.init(frame: frame)
        contentView.addSubview(bgView)
        contentView.addSubview(iconView)
        contentView.addSubview(nameLab)

        bgView.layoutChain
            .edges(excludingEdge: .top)
            .height(60)

        iconView.layoutChain
            .top()
            .centerX()
            .width(32)
            .heightToWidth(1)

        nameLab.layoutChain
            .topToBottomOfView(iconView, offset: 8)
            .edgesHorzontal()
    }

    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
}