Lanu_iOS/Lanu/Views/Room/Bottom/Join/LNRoomJoinMenuView.swift

//
//  LNRoomJoinMenuView.swift
//  Gami
//
//  Created by OneeChan on 2026/3/9.
//

import Foundation
import UIKit
import SnapKit


private enum LNRoomJoinMenuState {
    case normal
    case appling
    case reviewing
}


class LNRoomJoinMenuView: UIView {
    private let joinView = UIStackView()
    private let bgImageView = UIImageView()
    private let seatIc = UIImageView()
    private let titleLabel = UILabel()
    private let redCountView = UIView()
    private let redCountLabel = UILabel()
    
    private var curState: LNRoomJoinMenuState = .normal {
        didSet {
            switch curState {
            case .normal:
                toBeOffMic()
            case .appling:
                toBePending()
            case .reviewing:
                toBeRequests()
            }
        }
    }
    
    private weak var roomSession: LNRoomViewModel?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupViews()
        toBeOffMic()
        
        LNEventDeliver.addObserver(self)
    }
    
    func update(_ room: LNRoomViewModel?) {
        roomSession = room
        
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

extension LNRoomJoinMenuView: LNRoomViewModelNotify {
    func onRoomSeatApplyChanged() {
        guard let roomSession else { return }
        let applies = roomSession.curSeatApplications
        
        if applies.contains(where: { $0.userNo == myUid }) {
            curState = .appling
        } else {
            curState = .normal
        }
        
        if applies.isEmpty {
            redCountView.isHidden = true
        } else {
            redCountLabel.text = "\(applies.count)"
        }
    }
}

extension LNRoomJoinMenuView {
    private func setupViews() {
        backgroundColor = .fill.withAlphaComponent(0.15)
        layer.cornerRadius = 15
        onTap { [weak self] in
            guard let self else { return }
            guard let roomSession else { return }
            switch curState {
            case .normal:
                let panel = LNRoomApplySeatPanel()
                panel.update(roomSession)
                panel.popup()
            case .appling:
                break
            case .reviewing:
                let panel = LNRoomSeatApplyListPanel()
                panel.update(roomSession)
                panel.popup()
                break
            }
        }
        snp.makeConstraints { make in
            make.width.greaterThanOrEqualTo(69)
        }
        
        bgImageView.image = .primary_8
        bgImageView.layer.cornerRadius = 15
        bgImageView.clipsToBounds = true
        addSubview(bgImageView)
        bgImageView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        
        joinView.isUserInteractionEnabled = false
        joinView.spacing = 4
        addSubview(joinView)
        joinView.snp.makeConstraints { make in
            make.centerX.equalToSuperview()
            make.leading.greaterThanOrEqualToSuperview().offset(12)
            make.centerY.equalToSuperview()
        }
        
        seatIc.image = .icSeat
        joinView.addArrangedSubview(seatIc)
        seatIc.snp.makeConstraints { make in
            make.width.height.equalTo(16)
        }
        
        titleLabel.font = .heading_h5
        titleLabel.textColor = .text_1
        joinView.addArrangedSubview(titleLabel)
        
        redCountView.backgroundColor = .fill_6
        redCountView.layer.cornerRadius = 7
        addSubview(redCountView)
        redCountView.snp.makeConstraints { make in
            make.trailing.equalToSuperview()
            make.centerY.equalTo(snp.top)
            make.width.greaterThanOrEqualTo(15)
        }
        
        redCountLabel.text = "9"
        redCountLabel.font = .body_xs
        redCountLabel.textColor = .text_1
        redCountView.addSubview(redCountLabel)
        redCountLabel.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(4)
            make.verticalEdges.equalToSuperview()
        }
    }
    
    private func toBeOffMic() {
        redCountView.isHidden = true
        
        bgImageView.isHidden = false
        seatIc.isHidden = false
        titleLabel.text = .init(key: "A00322")
    }
    
    private func toBePending() {
        redCountView.isHidden = false
        
        bgImageView.isHidden = true
        seatIc.isHidden = true
        titleLabel.text = .init(key: "A00323")
    }
    
    private func toBeRequests() {
        redCountView.isHidden = false
        
        bgImageView.isHidden = true
        seatIc.isHidden = true
        titleLabel.text = .init(key: "A00324")
    }
}