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// Copyright (C) 2024 Rubén Beltrán del Río

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see https://map.tranquil.systems.
import AppKit
import Sparkle
import SwiftUI

@main
struct MapApp: App {

  private let updaterController: SPUStandardUpdaterController = SPUStandardUpdaterController(
    startingUpdater: true, updaterDelegate: nil, userDriverDelegate: nil)

  @AppStorage("appearanceStyle") private var appearanceStyle: String = UserPreferences.Defaults
    .appearanceStyle

  init() {
    // Apply appearance setting at app launch
    applyAppearanceStyle()
  }

  var body: some Scene {
    DocumentGroup(newDocument: MapDocument(text: nil)) { file in
      MapEditor(document: file.$document)
        .focusedSceneValue(\.document, file.$document)
        .focusedSceneValue(\.fileURL, file.fileURL)
    }
    .windowToolbarStyle(.unifiedCompact)
    .commands {
      MapCommands()
      UpdateCommands(updaterController: updaterController)
    }

    Settings {
      PreferencesWindow()
    }
    .onChange(of: appearanceStyle) { _, _ in
      applyAppearanceStyle()
    }
  }

  private func applyAppearanceStyle() {
    guard let style = AppearanceStyle(rawValue: appearanceStyle) else { return }

    DispatchQueue.main.async {
      switch style {
      case .system:
        NSApp.appearance = nil
      case .light:
        NSApp.appearance = NSAppearance(named: .aqua)
      case .dark:
        NSApp.appearance = NSAppearance(named: .darkAqua)
      }
    }
  }
}