import SwiftUI

struct ContentView: View {
  @EnvironmentObject var manager: BooruManager
  @Binding var selectedTab: Int
  @State private var tabs = [
    "Posts",
    "Search History",
    "Bookmarks",
  ]

  var body: some View {
    #if os(macOS)
      NavigationSplitView {
        List(selection: $selectedTab) {
          ForEach(Array(tabs.enumerated()), id: \.offset) { index, element in
            NavigationLink(value: index) { Text(element) }
          }
        }
      } content: {
        switch selectedTab {
        case 1:
          PostGridSearchHistoryView(
            selectedTab: $selectedTab,
            isPresented: .constant(false)
          )

        case 2:
          BookmarksView(selectedTab: $selectedTab)

        case 3:
          SettingsView()

        default:
          PostGridView(selectedTab: $selectedTab)
        }
      } detail: {
        if let post = manager.selectedPost {
          PostDetailsView(post: post)
        } else {
          Text("Select a Post")
            .foregroundColor(.secondary)
        }
      }
      #if DEBUG
        .onAppear { tabs.append("Settings") }
      #endif
    #else
      NavigationStack {
        PostGridView(selectedTab: $selectedTab)
          .navigationDestination(
            isPresented: Binding(
              get: { manager.selectedPost != nil },
              set: { if !$0 { manager.selectedPost = nil } }
            )
          ) {
            if let post = manager.selectedPost { PostDetailsView(post: post) }
          }
      }
    #endif
  }
}