//
//  WindowState.swift
//  Zyquo Atlas
//
//  Author: Simon-Pierre Boucher
//  Mail: contact@spboucher.ai
//
//  Per-window UI state and the command target. Held by BrowserWindowView and
//  published as a focused-scene value so the app's menu/keyboard commands
//  (AtlasCommands) route to whichever window is focused. Panels (find,
//  history, bookmarks, downloads, AI) are driven by these published flags.
//

import SwiftUI
import Combine

@MainActor
final class WindowState: ObservableObject {
    weak var tabManager: TabManager?
    weak var env: AppEnvironment?

    @Published var showAISidebar = false
    @Published var showFindBar = false
    @Published var showHistory = false
    @Published var showBookmarksManager = false
    @Published var showDownloads = false
    @Published var showCustomize = false
    @Published var showReader = false
    /// Incremented to ask the omnibox to take focus (⌘L).
    @Published var omniboxFocusToken = 0
    /// A pending "ask AI" query from the omnibox, with a token to trigger it.
    @Published var pendingAskToken = 0
    var pendingAsk: String?
    /// A pending selection action (from the floating selection toolbar).
    @Published var pendingSelectionToken = 0
    var pendingSelection: (action: AIAction, text: String)?

    /// Routes a selection action to the AI sidebar.
    func runSelection(_ action: AIAction, text: String) {
        pendingSelection = (action, text)
        showAISidebar = true
        pendingSelectionToken += 1
    }

    // MARK: - Command actions

    func newTab() { tabManager?.newTab() }
    func closeActiveTab() { if let id = tabManager?.activeTabID { tabManager?.closeTab(id) } }
    func focusOmnibox() { omniboxFocusToken += 1 }
    func quickAsk() { showAISidebar = true; focusOmnibox() }
    func toggleAISidebar() { showAISidebar.toggle() }
    func toggleReader() { showReader.toggle() }

    /// Routes an omnibox "ask AI" query to the AI sidebar.
    func askOmnibox(_ query: String) {
        pendingAsk = query
        showAISidebar = true
        pendingAskToken += 1
    }
    func toggleFind() { showFindBar.toggle() }
    func reload() { tabManager?.activeTab?.reload() }
    func goBack() { tabManager?.activeTab?.goBack() }
    func goForward() { tabManager?.activeTab?.goForward() }
    func selectTab(_ index: Int) { tabManager?.selectTab(atIndex: index) }
    func selectLastTab() { if let n = tabManager?.tabs.count, n > 0 { tabManager?.selectTab(atIndex: n - 1) } }

    func toggleBookmarkActiveTab() {
        guard let tab = tabManager?.activeTab, let url = tab.url?.absoluteString,
              let bookmarks = env?.bookmarks else { return }
        bookmarks.toggle(title: tab.title, url: url)
    }
}

// MARK: - Focused value plumbing

private struct WindowStateKey: FocusedValueKey {
    typealias Value = WindowState
}

extension FocusedValues {
    var windowState: WindowState? {
        get { self[WindowStateKey.self] }
        set { self[WindowStateKey.self] = newValue }
    }
}