//
//  MOLiveViewModel.swift
//  MiMoLive
//
//  Created by OneeChan on 2025/9/26.
//

import Foundation

@objc
protocol MOLiveViewModelDelegate {
    @objc optional func onLiveViewModelRecvLineInvite(viewModel: MOLiveViewModel, invite: MORtmLivePKLinkInvite)
}

@objcMembers
class MOLiveViewModel: NSObject {
    var curJoinedRoom: MOLiveDetail?
    var lineViewModel: MOLineViewModel? = nil
    let giftViewModel = MOGiftListViewModel()
    
    var isOwner: Bool {
        curJoinedRoom?.currentRoom.anchorUser.id == UserDefaults.uid
    }
    
    var ownerUid: String? {
        curJoinedRoom?.currentRoom.anchorUser.id
    }
    
    var curRoomId: String? {
        curJoinedRoom?.currentRoom.id
    }
    
    override init() {
        super.init()
        
        MOEventDeliver.addObserver(self)
    }
    
    func onJoingRoom(_ room: MOLiveList) {
        reset() // 房间切换，需要重置所有数据
    }
    
    func onRoomInfoChanged(_ info: MOStatusInfo) {
        curJoinedRoom?.statusInfo = info
    }
    
    func onJoinedRoom(_ room: MOLiveDetail) {
        self.curJoinedRoom = room
        
        checkLineStatus(room.statusInfo)
        giftViewModel.onJoinedRoom(room: room)
        
        if isOwner {
            MOLineViewModel.getLineConfig()
        }
    }
    
    // 后续需要将事件变化挪到本类自身处理
    func handleLiveStateChanged(info: MOStatusInfo, showLinkOrPk: Bool) {
        if showLinkOrPk {
            checkLineStatus(info)
        }
    }
    
    func isHost(_ uid: String) -> Bool {
        guard let curJoinedRoom else { return false }
        
        // 是房主
        if ownerUid == uid {
            return true
        }
        
        // 多人房主播
        if let linkMics = curJoinedRoom.statusInfo.roomStatus.linkMics as? [MOLinkMic],
           linkMics.first(where: { $0.profile.id == uid }) != nil {
           return true
        }
        
        // line 对方主播
        if let lineViewModel,
           lineViewModel.curPeerInfo?.userId == uid {
            return true
        }
        
        return false
    }
}

extension MOLiveViewModel {
    // TODO: Line 连线(后续需要迁移到 LineViewModel)
    func handleRoomRtm(entity: MORtmEntity) {
        guard let jsonEntity = entity.data as? MORtmJosnEntity else { return }
        switch (jsonEntity.type) {
        case 31:
            lineViewModel?.reloadLineRoomInfo()
        case 37: //邀请
            guard let invite = jsonEntity.pkLinkInvite else { return }
            notifyLineInvite(invite: invite)
        case 38: //PK房间信息变化
            guard let status = jsonEntity.pkV2Status else { return }
            lineViewModel?.handleLinePkRtm(status)
        case 39: //pk/连线 状态 信息
            guard let expand = jsonEntity.pkV2StatusExpand else { return }
            lineViewModel?.handleLinePkExpandRtm(expand)
        case 40: // toast
            guard let toast = jsonEntity.rtmToast else { return }
            guard let text = toast.text else { return }
            MBProgressHUD.showTipMessage(inWindow: text)
        default:
            break;
        }
    }
    
    func checkLineStatus(_ newStatusInfo: MOStatusInfo) {
        guard curJoinedRoom != nil else { return }
        guard let pkInfo = newStatusInfo.roomStatus.linkPKInfo else { return }
        let lineRoomId = pkInfo.pkLinkRoomId
        
        guard lineViewModel?.curLineRoomId != lineRoomId else {
            // Line 房间号不变，已经加入了该 Line 房间
            return
        }
        // Line 房间 ID 变化
        if let lineViewModel, !lineViewModel.curLineRoomId.isEmpty {
            // 需要退出旧 Line 房间
            lineViewModel.clear() // 将原来的 Line 房间 清理掉
            self.lineViewModel = nil
        }
        
        if let lineRoomId, let token = pkInfo.agoraRtcToken,
           !lineRoomId.isEmpty, !token.isEmpty {
            // 创建新的 Line 房逻辑
            self.lineViewModel = MOLineViewModel(lineRoomId: lineRoomId, token: token)
        }
    }
}

extension MOLiveViewModel {
    private func reset() {
        lineViewModel?.clear()
        lineViewModel = nil
    }
}

extension MOLiveViewModel {
    func notifyLineInvite(invite: MORtmLivePKLinkInvite) {
        MOEventDeliver.notifyEvent { $0.onLiveViewModelRecvLineInvite?(viewModel: self, invite: invite) }
    }
}

extension MOLiveViewModel: MOLineViewModelDelegate {
    func onLineJoinFailed(viewModel: MOLineViewModel) {
        guard viewModel == self.lineViewModel else { return }
        self.lineViewModel?.clear()
        self.lineViewModel = nil
    }
    
    func onLineStateChanged(state: LineState) {
        guard MOLiveManager.curLive == self else { return }
        if state == .none {
            // Line 结束，清理 Line 相关逻辑
            self.lineViewModel = nil
        }
    }
}