import SwiftUI
import SwiftData
import Cocoa

@main
struct CapturaApp: App {
  
    @NSApplicationDelegateAdaptor(CapturaAppDelegate.self) var appDelegate

    var body: some Scene {
        WindowGroup {
            PreferencesWindow()
              .handlesExternalEvents(preferring: Set(arrayLiteral: "PreferencesWindow"), allowing: Set(arrayLiteral: "*"))
              .frame(width: 650, height: 450)
        }
        .handlesExternalEvents(matching: Set(arrayLiteral: "PreferencesWindow"))
        .modelContainer(for: Item.self)
      }
}

class CapturaAppDelegate: NSObject, NSApplicationDelegate {
    
    @Environment(\.openURL) var openURL
    var statusItem: NSStatusItem!
    var captureState: CaptureState = .idle
    var recordingWindow: RecordingWindow? = nil

    func applicationDidFinishLaunching(_ notification: Notification) {
      setupMenu()
      NotificationCenter.default.addObserver(
        self,
        selector: #selector(self.didReceiveNotification(_:)),
        name: nil,
        object: nil)
      closeWindow()
    }
  
    // MARK: - Setup Functions
  
  
    private func setupMenu() {
      statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)

      statusItem.button!.image = NSImage(systemSymbolName: "rectangle.dashed.badge.record", accessibilityDescription: "Captura")
      statusItem.isVisible = true
      statusItem.menu = NSMenu()
      
      let recordItem = NSMenuItem(title: "Record", action: #selector(CapturaAppDelegate.onClickStartRecording), keyEquivalent: "6")
      recordItem.keyEquivalentModifierMask = [.command, .shift]
      
      statusItem.menu?.addItem(recordItem)
      statusItem.menu?.addItem(NSMenuItem.separator())
      
      let preferencesItem = NSMenuItem(title: "Preferences", action: #selector(CapturaAppDelegate.onOpenPreferences), keyEquivalent: "")
      statusItem.menu?.addItem(preferencesItem)
      
      let quitItem = NSMenuItem(title: "Quit", action: #selector(CapturaAppDelegate.onQuit), keyEquivalent: "")
      statusItem.menu?.addItem(quitItem)
    }
  
    private func closeWindow() {
      if let window = NSApplication.shared.windows.first {
          window.close()
      }
    }
  
    // MARK: - UI Event Handlers

    @objc private func onClickStartRecording() {
      NotificationCenter.default.post(name: .startAreaSelection, object: nil, userInfo: nil)
    }
  
    @objc private func onOpenPreferences() {
      print("Preferences pressed")
    }
  
    @objc private func onQuit() {
      NSApplication.shared.terminate(self)
    }
  
  
    // MARK: - App State Event Listeners
  
    @objc func didReceiveNotification(_ notification: Notification) {
      switch(notification.name) {
      case .startAreaSelection:
        startAreaSelection()
      case .startRecording:
        startRecording()
      case .stopRecording:
        stopRecording()
      case .finalizeRecording:
        finalizeRecording()
      case .reset:
        reset()
      default:
        return
      }
/*
      if let data = notification.userInfo?["data"] as? String {
          print("Data received: \(data)")
      }
 */
    }

  
    @objc func startAreaSelection() {
      if captureState != .selectingArea {
        captureState = .selectingArea
        recordingWindow = RecordingWindow()
      }
    }
  
    func startRecording() {
      captureState = .recording
    }
  
    func stopRecording() {
      captureState = .uploading
    }
  
    func finalizeRecording() {
      captureState = .uploaded
    }
  
    func reset() {
      captureState = .idle
      recordingWindow?.close()
      self.recordingWindow = nil
    }
}