//
//  GroupChooseView.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/27.
//

import UIKit
import ObjectMapper

class GroupChooseView: UIView {

    private static let shared = GroupChooseView(frame: CGRect(origin: .zero, size: kScreenSize))

    private var groupModel: GroupModel? {
        didSet {
            guard let model = groupModel else { return }
            groupList = model.groups
            let count = min(model.groups.count, 5)
            tableView.isScrollEnabled = model.groups.count > 5
            tableView.layoutChain.height(CGFloat(count * 68), relation: .greaterThanOrEqual)
        }
    }

    private var groupInfo: [String: Any] {
        guard let model = groupModel,
              let groupInfoModel = model.groups.first(where: { $0.group_key == defaultGroupKey }) else { return [:] }
        return groupInfoModel.toJSON()
    }

    private var defaultGroupKey: String = "" {
        didSet { tableView.reloadData() }
    }

    private var groupList: [GroupInfoModel] = [] {
        didSet { tableView.reloadData() }
    }

    private var completion: ((String?) -> Void)?

    @objc func tap() { completion?(nil) }

    @objc func cancelAction(button: UIButton) { completion?(nil) }

    @objc func inviteAction(button: UIButton) {
        completion?(nil)
        AppRouter.push(Route.inviteJoin, userInfo: ["groupInfo": self.groupInfo])
    }

    private lazy var bgView: UIView = {
        let view = UIView()
        view.backgroundColor = .black.withAlphaComponent(0.5)
        view.clipsToBounds = true
        return view
    }()

    lazy var infoView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        view.layer.cornerRadius = 10
        view.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        return view
    }()

    lazy var titleLab: UILabel = {
        let label = UILabel()
        label.text = "选择圈子"
        label.font = .systemFont(ofSize: 16, weight: .bold)
        label.textColor = ThemeManager.shared.color.titleAuxColor
        return label
    }()

    lazy var tableView: UITableView = {
        let tableView = UITableView(frame: .zero, style: .grouped)
        tableView.backgroundColor = .white
        tableView.separatorStyle = .none
        tableView.estimatedRowHeight = 68
        tableView.showsVerticalScrollIndicator = false
        tableView.bounces = false
        tableView.isScrollEnabled = false
        tableView.register(GroupListCell.self)
        tableView.tableHeaderView = UIView(frame: CGRectMake(0, 0, kScreenWidth, 10))
        tableView.dataSource = self
        tableView.delegate = self
        return tableView
    }()

    lazy var cancelBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setTitle("取消", for: .normal)
        btn.setTitleColor(UIColor(hexStr: "#16B3FF"), for: .normal)
        btn.titleLabel?.font = .systemFont(ofSize: 15, weight: .medium)
        btn.backgroundColor = .white
        btn.borderWidth = 1
        btn.borderColor = UIColor(hexStr: "#16B3FF")
        btn.cornerRadius = 20
        btn.addTarget(self, action: #selector(cancelAction), for: .touchUpInside)
        return btn
    }()

    lazy var inviteBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setTitle("邀请", for: .normal)
        btn.setTitleColor(.white, for: .normal)
        btn.titleLabel?.font = .systemFont(ofSize: 16, weight: .medium)
        btn.setBackgroundImage(UIImage(named: "Common/button_bg_2"), for: .normal)
        btn.cornerRadius = 20
        btn.addTarget(self, action: #selector(inviteAction), for: .touchUpInside)
        return btn
    }()

    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = .clear
        addSubview(bgView)
        bgView.addSubview(infoView)
        infoView.addSubview(titleLab)
        infoView.addSubview(tableView)
        infoView.addSubview(cancelBtn)
        infoView.addSubview(inviteBtn)

        // bgView 全屏
        bgView.layoutChain.edges()

        // infoView 横向撑满，底部对齐，高度由内容决定
        infoView.layoutChain
            .edgesHorzontal()
            .bottom()

        titleLab.layoutChain
            .top(16)
            .left(12)

        cancelBtn.layoutChain
            .left(15)
            .bottom(20 + kSafeBottomMargin)
            .widthToView(inviteBtn)
            .height(44)

        inviteBtn.layoutChain
            .leftToRightOfView(cancelBtn, offset: 7)
            .right(15)
            .bottomToView(cancelBtn)
            .height(44)
            .widthToView(inviteBtn)

        tableView.layoutChain
            .topToBottomOfView(titleLab, offset: 10)
            .edgesHorzontal()
            .bottomToTopOfView(cancelBtn, offset: -17)
            .height(78, relation: .greaterThanOrEqual)

        let tap = UITapGestureRecognizer(target: self, action: #selector(tap))
        tap.delegate = self
        addGestureRecognizer(tap)
    }

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

    override func layoutSubviews() {
        super.layoutSubviews()
    }
}

// MARK: - Public
extension GroupChooseView {

    /// 显示选择弹窗（底部弹出）
    static func show(groupModel: GroupModel,
                     completion: @escaping ((String?) -> Void)) {
        guard let superView = kKeyWindow else { return }

        let shared = GroupChooseView.shared
        if shared.superview != nil {
            shared.removeFromSuperview()
        }

        shared.groupModel = groupModel
        shared.frame = CGRect(x: 0, y: 0, width: kScreenWidth, height: kScreenHeight)
        superView.addSubview(shared)
        superView.bringSubviewToFront(shared)

        shared.bgView.alpha = 0
        shared.infoView.transform = CGAffineTransform(translationX: 0, y: shared.infoView.frame.maxY + 100)

        shared.completion = { text in
            completion(text)
            GroupChooseView.dismiss()
        }

        shared.layoutIfNeeded()
        UIView.animate(withDuration: 0.3, delay: 0, options: .curveEaseOut) {
            shared.bgView.alpha = 1
            shared.infoView.transform = .identity
        }
    }

    /// 关闭（底部滑出）
    static func dismiss() {
        guard GroupChooseView.shared.superview != nil else { return }
        let shared = GroupChooseView.shared
        UIView.animate(withDuration: 0.25, delay: 0, options: .curveEaseIn) {
            shared.bgView.alpha = 0
            shared.infoView.transform = CGAffineTransform(translationX: 0, y: shared.infoView.frame.maxY + 100)
        } completion: { _ in
            shared.removeFromSuperview()
            shared.infoView.transform = .identity
        }
    }
}

// MARK: - UIGestureRecognizerDelegate
extension GroupChooseView: UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
        if let view = touch.view, !(view == self || view == bgView) {
            return false
        }
        return true
    }
}

// MARK: - UITableViewDataSource & UITableViewDelegate
extension GroupChooseView: UITableViewDataSource, UITableViewDelegate {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        groupList.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell: GroupListCell = tableView.dequeueReusableCell(for: indexPath)
        cell.configure(model: groupList[indexPath.row],
                       isSelected: defaultGroupKey == groupList[indexPath.row].group_key)
        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        defaultGroupKey = groupList[indexPath.row].group_key
    }
}