import Cocoa
import SwiftUI

class AppDelegate: NSObject, NSApplicationDelegate {
    private var statusItem: NSStatusItem!
    private var volumeMonitor: VolumeMonitor!
    private var hudPanel: HUDPanel!

    func applicationDidFinishLaunching(_ notification: Notification) {
        // Hide from Dock
        NSApp.setActivationPolicy(.accessory)

        setupStatusBar()
        setupHUD()
        setupVolumeMonitor()
    }

    private func setupStatusBar() {
        statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)

        if let button = statusItem.button {
            button.image = NSImage(systemSymbolName: "speaker.wave.2.fill", accessibilityDescription: "HUDini")
            button.image?.size = NSSize(width: 18, height: 18)
        }

        let menu = NSMenu()
        menu.addItem(NSMenuItem(title: "HUDini", action: nil, keyEquivalent: ""))
        menu.addItem(NSMenuItem.separator())

        let enabledItem = NSMenuItem(title: "Enabled", action: #selector(toggleEnabled(_:)), keyEquivalent: "e")
        enabledItem.state = .on
        enabledItem.target = self
        menu.addItem(enabledItem)

        menu.addItem(NSMenuItem.separator())
        let quitItem = NSMenuItem(title: "Quit", action: #selector(quit), keyEquivalent: "q")
        quitItem.target = self
        menu.addItem(quitItem)

        statusItem.menu = menu
    }

    private func setupHUD() {
        hudPanel = HUDPanel()
    }

    private func setupVolumeMonitor() {
        volumeMonitor = VolumeMonitor { [weak self] volume, isMuted in
            DispatchQueue.main.async {
                self?.hudPanel.show(volume: volume, isMuted: isMuted)
            }
        }
        volumeMonitor.start()
    }

    @objc private func toggleEnabled(_ sender: NSMenuItem) {
        if sender.state == .on {
            sender.state = .off
            volumeMonitor.stop()
        } else {
            sender.state = .on
            volumeMonitor.start()
        }
    }

    @objc private func quit() {
        volumeMonitor.stop()
        NSApp.terminate(nil)
    }
}