//
//  ZyquoCloudApp.swift
//  Zyquo Cloud
//
//  Author: Simon-Pierre Boucher
//  Mail: contact@spboucher.ai
//

import SwiftUI

struct ZyquoCloudApp: App {
    @NSApplicationDelegateAdaptor(AppDelegate.self) private var appDelegate
    @StateObject private var environment = AppEnvironment()
    @State private var quickChat: QuickChatController?
    @AppStorage("menuBarExtraEnabled") private var menuBarExtraEnabled = true

    var body: some Scene {
        WindowGroup("Zyquo Cloud") {
            MainWindowView()
                .environmentObject(environment.conversations)
                .environmentObject(environment.catalog)
                .environmentObject(environment.vault)
                .environmentObject(environment.appearance)
                .onAppear {
                    if quickChat == nil {
                        quickChat = QuickChatController(environment: environment)
                    }
                }
        }
        .defaultSize(
            width: ZyquoMetrics.windowDefaultWidth,
            height: ZyquoMetrics.windowDefaultHeight
        )
        .commands {
            AppCommands(environment: environment, quickChat: { quickChat })
        }

        Settings {
            SettingsView()
                .environmentObject(environment.conversations)
                .environmentObject(environment.catalog)
                .environmentObject(environment.vault)
                .environmentObject(environment.appearance)
        }

        MenuBarExtra(isInserted: $menuBarExtraEnabled) {
            Button("New Chat") {
                _ = environment.conversations.newConversation()
                NSApp.activate(ignoringOtherApps: true)
            }
            Button("Quick Chat  ⌥Space") {
                quickChat?.show()
            }
            Divider()
            Button("Open Zyquo Cloud") {
                NSApp.activate(ignoringOtherApps: true)
            }
            Button("Quit") {
                NSApp.terminate(nil)
            }
        } label: {
            MenuBarIconView()
        }
    }
}

/// Menu bar glyph: the shipped template PNG when bundled, SF Symbol fallback
/// during `swift run` (no bundle resources).
struct MenuBarIconView: View {
    var body: some View {
        if let image = Self.templateImage() {
            Image(nsImage: image)
        } else {
            Image(systemName: "cloud.fill")
        }
    }

    private static func templateImage() -> NSImage? {
        guard let path = Bundle.main.path(forResource: "MenuBarIcon", ofType: "png"),
              let image = NSImage(contentsOfFile: path) else { return nil }
        image.isTemplate = true
        image.size = NSSize(width: 18, height: 18)
        return image
    }
}

final class AppDelegate: NSObject, NSApplicationDelegate {
    func applicationDidFinishLaunching(_ notification: Notification) {
        // Ensure the app fronts correctly when launched outside Finder
        // (e.g. `swift run` or `open` from a terminal during development).
        NSApplication.shared.setActivationPolicy(.regular)
        NSApplication.shared.activate(ignoringOtherApps: true)
    }
}

/// App-level menu commands and shortcuts.
struct AppCommands: Commands {
    let environment: AppEnvironment
    var quickChat: () -> QuickChatController?

    var body: some Commands {
        CommandGroup(replacing: .newItem) {
            Button("New Chat") {
                _ = environment.conversations.newConversation()
            }
            .keyboardShortcut("n", modifiers: .command)
        }
        CommandMenu("Chat") {
            Button("Quick Chat") {
                quickChat()?.show()
            }
            Button("Stop Generating") {
                if let id = environment.conversations.selectedID {
                    environment.conversations.stopStreaming(id)
                }
            }
            .keyboardShortcut(".", modifiers: .command)
            Divider()
            Button("Export Conversation…") {
                if let conversation = environment.conversations.selected {
                    ConversationExporter.presentSavePanel(for: conversation)
                }
            }
            .keyboardShortcut("e", modifiers: [.command, .shift])
        }
    }
}