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

import UIKit
import RxSwift
import RxCocoa
import AMapNaviKit

class GroupScheduleView: UIView {

    var disposeBag = DisposeBag()
    let selectedSchedule = PublishSubject<ScheduleModel>()

    // MARK: - PopView 拖拽
    private var popTopConstraint: NSLayoutConstraint?
    private var isLimitsSet = false
    private let popDownHeight: CGFloat = 250
    private var popUpLimit: CGFloat = 0
    private var panStartTop: CGFloat = 0
    private var isSubCanScroll = false

    private func setupRx() {
        backBtn.rx.tap.subscribe(onNext: { _ in
            AppRouter.shared.popOrDismiss()
        }).disposed(by: disposeBag)
    }

    private func setupUI() {
        addSubview(mapView)
        addSubview(navBgView)
        addSubview(navBarView)
        navBarView.addSubview(navTitleLabel)
        navBarView.addSubview(backBtn)
        addSubview(bottomView)
        bottomView.addSubview(lineView)
        bottomView.addSubview(tableView)

        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)

        mapView.layoutChain
            .top()
            .edgesHorzontal()
            .bottom()

        // 底部面板
        bottomView.layoutChain
            .edgesHorzontal()
            .bottom()
            .top(kScreenHeight - popDownHeight)

        lineView.layoutChain
            .top(8)
            .centerX()
            .width(36)
            .height(4)

        tableView.layoutChain
            .topToBottomOfView(lineView, offset: 10)
            .edgesHorzontal()
            .bottom()

        popTopConstraint = bottomView.jh_constraint(
            .top, toAttribute: .top, otherView: bottomView.superview, relation: .equal
        )

        let pan = UIPanGestureRecognizer(target: self, action: #selector(handlePan(_:)))
        pan.delegate = self
        bottomView.addGestureRecognizer(pan)
    }

    // MARK: - Pan Gesture

    @objc private func handlePan(_ pan: UIPanGestureRecognizer) {
        guard isLimitsSet, let topConstraint = popTopConstraint else { return }

        switch pan.state {
        case .began:
            panStartTop = bottomView.frame.minY

        case .changed:
            let newTop = panStartTop + pan.translation(in: self).y
            let scrollOffset = tableView.contentOffset.y

            if isSubCanScroll {
                if scrollOffset > 0 { return }
                if pan.velocity(in: self).y > 0 || bottomView.frame.minY > popUpLimit + 1 {
                    isSubCanScroll = false
                    panStartTop = bottomView.frame.minY
                }
            } else {
                if bottomView.frame.minY <= popUpLimit && newTop <= popUpLimit {
                    isSubCanScroll = true
                    panStartTop = bottomView.frame.minY
                    topConstraint.constant = popUpLimit
                    return
                }
            }

            let clamped = max(popUpLimit, min(kScreenHeight - popDownHeight, newTop))
            topConstraint.constant = clamped

        case .ended, .cancelled:
            let velocity = pan.velocity(in: self)
            let frameMinY = bottomView.frame.minY
            let isNearUp = abs(frameMinY - popUpLimit) < abs(frameMinY - (kScreenHeight - popDownHeight))
            let target: CGFloat
            if frameMinY <= popUpLimit + 5 {
                target = isNearUp ? popUpLimit : (kScreenHeight - popDownHeight)
            } else if abs(velocity.y) > 200 {
                target = velocity.y < 0 ? popUpLimit : (kScreenHeight - popDownHeight)
            } else {
                target = isNearUp ? popUpLimit : (kScreenHeight - popDownHeight)
            }
            topConstraint.constant = target
            isSubCanScroll = target == popUpLimit

            UIView.animate(withDuration: 0.3, delay: 0,
                           usingSpringWithDamping: 0.85,
                           initialSpringVelocity: abs(velocity.y) / 1000,
                           options: [.allowUserInteraction]) {
                self.layoutIfNeeded()
            }

        default:
            break
        }
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        if !isLimitsSet {
            isLimitsSet = true
            popUpLimit = navBarView.frame.maxY
        }
    }

    // MARK: - Views

    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 = "行程路线"
        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
    }()

    lazy var mapView: MAMapView! = {
        let mv = MAMapView()
        mv.zoomLevel = 14
        mv.showsUserLocation = false
        mv.showsCompass = false
        mv.userTrackingMode = .none
        return mv
    }()

    lazy var bottomView: UIView = {
        let v = UIView()
        v.backgroundColor = .white
        v.layer.cornerRadius = 16
        v.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        return v
    }()

    lazy var lineView: UIView = {
        let v = UIView()
        v.backgroundColor = UIColor(hexStr: "#EBEBEB")
        v.cornerRadius = 2
        return v
    }()

    lazy var tableView: UITableView = {
        let tv = UITableView(frame: .zero, style: .plain)
        tv.backgroundColor = .clear
        tv.separatorStyle = .none
        tv.estimatedRowHeight = 137
        tv.rowHeight = UITableView.automaticDimension
        tv.register(GroupScheduleCell.self)
        return tv
    }()

    /// 收起底部面板到初始位置
    func dismissPanel() {
        guard let topConstraint = popTopConstraint else { return }
        isSubCanScroll = false
        topConstraint.constant = kScreenHeight - popDownHeight
        UIView.animate(withDuration: 0.3) { self.layoutIfNeeded() }
    }

    func cleanupMap() {
        #if !targetEnvironment(simulator)
        mapView?.delegate = nil
        mapView?.removeFromSuperview()
        mapView = nil
        #endif
    }

    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: - UIGestureRecognizerDelegate
extension GroupScheduleView: UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer,
                           shouldRecognizeSimultaneouslyWith other: UIGestureRecognizer) -> Bool {
        return true
    }
}

// MARK: - GroupScheduleCell
class GroupScheduleCell: UITableViewCell {

    func configure(_ model: ScheduleModel, isSelected: Bool) {
        dateLab.text = "行程时间：\(getDateInterval2String(date: "\(model.timestamp/1000)", dateFormat: "yyyy年MM月dd日"))"
        iconView.image = model.userIcon
        nameLab.text = "\(model.nick_name) 的行程路线"
        selectedBgView.isHidden = !isSelected
    }

    private func setupSubviews() {
        contentView.addSubview(bgView)
        bgView.addSubview(selectedBgView)
        bgView.addSubview(dateLab)
        bgView.addSubview(detailView)

        bgView.layoutChain
            .top()
            .edgesHorzontal(15)
            .height(137)
            .bottom(12)

        selectedBgView.layoutChain.edges()

        dateLab.layoutChain
            .top(9)
            .left(15)

        detailView.layoutChain
            .topToBottomOfView(dateLab, offset: 8)
            .edges(all: 15, excludingEdge: .top)
    }

    lazy var bgView: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hexStr: "#EEFAFF")
        view.cornerRadius = 10
        return view
    }()

    lazy var selectedBgView: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hexStr: "#C0EAFF")
        view.borderWidth = 1
        view.borderColor = UIColor(hexStr: "#16B3FF")
        view.cornerRadius = 10
        view.isHidden = true
        return view
    }()

    lazy var dateLab: UILabel = {
        let label = UILabel()
        label.text = " "
        label.font = .systemFont(ofSize: 14, weight: .medium)
        label.textColor = UIColor(hexStr: "#0F2846")
        return label
    }()

    lazy var detailView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        view.cornerRadius = 10

        view.addSubview(iconView)
        iconView.layoutChain
            .left(15)
            .centerY()
            .width(50)
            .heightToWidth(1)

        view.addSubview(nameLab)
        nameLab.layoutChain
            .leftToRightOfView(iconView, offset: 14)
            .right(15, relation: .greaterThanOrEqual)
            .centerY(iconView)

        return view
    }()

    lazy var iconView: UIImageView = {
        let view = UIImageView()
        view.contentMode = .scaleAspectFill
        return view
    }()

    lazy var nameLab: UILabel = {
        let label = UILabel()
        label.font = .systemFont(ofSize: 14, weight: .medium)
        label.textColor = UIColor(hexStr: "#0F2846")
        return label
    }()

    override init(style: CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        selectionStyle = .none
        backgroundColor = .clear
        setupSubviews()
    }

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