//
//  ContentView.swift
//  Nextcloud Cookbook iOS Client
//
//  Created by Vincent Meilinger on 06.09.23.
//

import SwiftUI

struct MainView: View {
    @StateObject var appState = AppState()
    @StateObject var groceryList = GroceryListManager()

    // Tab ViewModels
    @StateObject var recipeViewModel = RecipeTabView.ViewModel()
    @StateObject var searchViewModel = SearchTabView.ViewModel()

    @ObservedObject private var userSettings = UserSettings.shared

    @State private var selectedTab: Tab = .recipes

    enum Tab {
        case recipes, search, groceryList
    }

    var body: some View {
        TabView(selection: $selectedTab) {
            SwiftUI.Tab("Recipes", systemImage: "book.closed.fill", value: .recipes) {
                RecipeTabView()
                    .environmentObject(recipeViewModel)
                    .environmentObject(appState)
                    .environmentObject(groceryList)
            }

            SwiftUI.Tab("Search", systemImage: "magnifyingglass", value: .search, role: .search) {
                SearchTabView()
                    .environmentObject(searchViewModel)
                    .environmentObject(appState)
                    .environmentObject(groceryList)
            }

            if userSettings.groceryListMode != GroceryListMode.appleReminders.rawValue {
                SwiftUI.Tab("Grocery List", systemImage: "storefront", value: .groceryList) {
                    GroceryListTabView()
                        .environmentObject(groceryList)
                }
            }
        }
        .tabViewStyle(.sidebarAdaptable)
        .modifier(TabBarMinimizeModifier())
        .onChange(of: userSettings.groceryListMode) { _, newValue in
            if newValue == GroceryListMode.appleReminders.rawValue && selectedTab == .groceryList {
                selectedTab = .recipes
            }
            Task {
                await groceryList.load()
            }
        }
        .task {
            recipeViewModel.presentLoadingIndicator = true
            await appState.getCategories()
            await appState.updateAllRecipeDetails()

            // Preload category images
            for category in appState.categories {
                await appState.getCategoryImage(for: category.name)
            }

            // Load recently viewed recipes
            await appState.loadRecentRecipes()

            // Open detail view for default category
            if UserSettings.shared.defaultCategory != "" {
                if let cat = appState.categories.first(where: { c in
                    if c.name == UserSettings.shared.defaultCategory {
                        return true
                    }
                    return false
                }) {
                    recipeViewModel.selectedCategory = cat
                }
            }
            await groceryList.load()
            groceryList.configureSyncManager(appState: appState)
            if UserSettings.shared.grocerySyncEnabled {
                await groceryList.syncManager?.performInitialSync()
            }
            recipeViewModel.presentLoadingIndicator = false
        }
    }
}