// 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 SwiftUI

enum PreferencesTab: CaseIterable {

  case general
  case editor
  case map
  case stages
  case templates

  var localizedStringKey: LocalizedStringKey {
    switch self {
    case .general:
      return "preferences.menu.general"
    case .editor:
      return "preferences.menu.editor"
    case .map:
      return "preferences.menu.map"
    case .stages:
      return "preferences.menu.stages"
    case .templates:
      return "preferences.menu.templates"
    }
  }

  var systemImage: String {
    switch self {
    case .general:
      return "gearshape"
    case .editor:
      return "text.word.spacing"
    case .map:
      return "map"
    case .stages:
      return "list.number"
    case .templates:
      return "doc.text"
    }
  }
}

struct PreferencesWindow: View {
  @State private var selectedTab: PreferencesTab = .general

  var body: some View {
    Group {
      switch selectedTab {
      case .general:
        GeneralPreferencesView()
      case .editor:
        EditorPreferencesView()
      case .map:
        MapPreferencesView()
      case .stages:
        StagesPreferencesView()
      case .templates:
        TemplatesPreferencesView()
      }
    }
    .frame(width: Dimensions.Preferences.Window.width, height: Dimensions.Preferences.Window.height)
    .toolbar {
      ToolbarItem(placement: .principal) {
        HStack(spacing: Dimensions.Spacing.loose) {
          ForEach(PreferencesTab.allCases, id: \.self) { tab in
            Button(action: { selectedTab = tab }) {
              VStack(spacing: Dimensions.Spacing.coziest) {
                Image(systemName: tab.systemImage)
                  .font(.system(size: Dimensions.Preferences.Toolbar.size))
                Text(tab.localizedStringKey)
                  .font(.Theme.SmallControl.regular)
              }
              .frame(
                width: Dimensions.Preferences.Toolbar.width,
                height: Dimensions.Preferences.Toolbar.height
              )
              .padding(.horizontal, Dimensions.Spacing.cozy)
              .background(
                selectedTab == tab ? Color.Theme.UI.accent : Color.background.opacity(0.01)
              )
              .foregroundColor(selectedTab == tab ? Color.white : Color.Theme.UI.foreground)
              .clipShape(clipShape())
              .padding(.horizontal, 2.0)
            }
            .buttonStyle(.plain)
          }
        }
      }
    }
  }

  private func clipShape() -> AnyShape {
    if #available(macOS 26.0, *) {
      AnyShape(RoundedRectangle(cornerRadius: Dimensions.Preferences.Toolbar.glassRadius))
    } else {
      AnyShape(RoundedRectangle(cornerRadius: Dimensions.Preferences.Toolbar.radius))
    }
  }
}

#Preview {
  PreferencesWindow()
}