//
//  AppState.swift
//  SodaLive
//
//  Created by klaus on 2023/08/09.
//

import Foundation

struct AppRoute: Hashable {
    let id = UUID()
}

class AppState: ObservableObject {
    static let shared = AppState()
    
    private var routeStepMap: [AppRoute: AppStep] = [:]
    
    @Published var alreadyUpdatedMarketingInfo = false
    @Published private(set) var appStep: AppStep = .splash
    @Published private(set) var rootStep: AppStep = .splash
    @Published var navigationPath: [AppRoute] = [] {
        didSet {
            syncStepWithNavigationPath()
        }
    }
    
    @Published var isShowPlayer = false {
        didSet {
            if isShowPlayer {
                ContentPlayManager.shared.stopAudio()
                ContentPlayerPlayManager.shared.resetPlayer()
            }
        }
    }
    
    @Published var isShowNotificationSettingsDialog = false
    
    @Published var pushRoomId = 0
    @Published var pushChannelId = 0
    @Published var pushMessageId = 0
    @Published var pushAudioContentId = 0
    @Published var pushSeriesId = 0
    @Published var roomId = 0 {
        didSet {
            if roomId <= 0 {
                isShowPlayer = false
            }
        }
    }
    
    @Published var eventPopup: EventItem? = nil
    @Published var purchasedContentId = 0
    @Published var purchasedContentOrderType = OrderType.KEEP
    
    @Published var isRestartApp = false
    @Published var startTab: HomeViewModel.CurrentTab = .home
    
    @Published var marketingUtmSource = ""
    @Published var marketingUtmMedium = ""
    @Published var marketingUtmCampaign = ""
    
    @Published var isShowErrorPopup = false
    @Published var errorMessage = ""
    
    private func syncStepWithNavigationPath() {
        let validRoutes = Set(navigationPath)
        routeStepMap = routeStepMap.filter { validRoutes.contains($0.key) }
        
        if let route = navigationPath.last,
           let step = routeStepMap[route] {
            appStep = step
        } else {
            appStep = rootStep
        }
    }
    
    func appStep(for route: AppRoute) -> AppStep? {
        routeStepMap[route]
    }
    
    func setAppStep(step: AppStep) {
        DispatchQueue.main.async {
            switch step {
            case .splash, .main:
                self.rootStep = step
                self.routeStepMap.removeAll()
                self.navigationPath.removeAll()
                self.appStep = step
                
            default:
                let route = AppRoute()
                self.routeStepMap[route] = step
                self.navigationPath.append(route)
                self.appStep = step
            }
        }
    }
    
    func back() {
        DispatchQueue.main.async {
            if self.navigationPath.isEmpty {
                self.rootStep = .main
                self.appStep = .main
                return
            }
            
            _ = self.navigationPath.popLast()
        }
    }
    
    // 언어 적용 직후 앱을 소프트 재시작(스플래시 -> 메인)하여 전역 UI를 새로고침
    func softRestart() {
        isRestartApp = true
        setAppStep(step: .splash)
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
            self.setAppStep(step: .main)
        }
    }
}