import SwiftUI

struct ContentView: View {
  @EnvironmentObject var manager: BooruManager
  @Binding var selectedTab: Int
  @State private var columnVisibility = NavigationSplitViewVisibility.doubleColumn
  @State private var navigationPath = NavigationPath()

  var body: some View {
    #if os(macOS)
      NavigationSplitView(columnVisibility: $columnVisibility) {
        List {
          Text("Posts")
            .tag(0)
        }
      } content: {
        switch selectedTab {
        case 1:
          PostGridSearchHistoryView(
            selectedTab: $selectedTab,
            isPresented: .constant(false)
          )

        case 2:
          BookmarksView(selectedTab: $selectedTab)

        case 3:
          SettingsView()

        default:
          PostGridView(selectedTab: $selectedTab, navigationPath: $navigationPath)
        }
      } detail: {
        if let post = manager.selectedPost {
          PostDetailsView(post: post, navigationPath: $navigationPath, posts: nil)
        } else {
          Text("Select a Post")
            .foregroundColor(.secondary)
        }
      }
    #else
      NavigationStack(path: $navigationPath) {
        PostGridView(selectedTab: $selectedTab, navigationPath: $navigationPath)
          .navigationDestination(for: BooruPost.self) { post in
            PostDetailsView(post: post, navigationPath: $navigationPath, posts: nil)
          }
          .navigationDestination(for: PostWithContext.self) { context in
            PostDetailsView(
              post: context.post,
              navigationPath: $navigationPath,
              posts: context.posts,
              baseSearchText: context.baseSearchText
            )
          }
          .navigationDestination(for: String.self) { tag in
            PostGridView(
              selectedTab: $selectedTab, navigationPath: $navigationPath, initialTag: tag
            )
          }
      }
    #endif
  }
}