//! Real popup windows for Linux/WebKitGTK content views.
//!
//! wry does not connect WebKitGTK's `create` signal, so new-window requests
//! would never produce a window with a live `window.opener`. That breaks
//! popup-based logins ("Sign in with Google" and friends). Here we attach the
//! signal to the raw `WebKitWebView` and build proper related-view popups.

use super::{NavKind, NewWindowDecision, UserEvent, decide_new_window};
use gtk::prelude::*;
use std::cell::{Cell, RefCell};
use std::rc::Rc;
use tao::event_loop::EventLoopProxy;
use webkit2gtk::{URIRequestExt, UserContentManagerExt, WebViewExt};

pub struct PopupHub {
    pub proxy: EventLoopProxy<UserEvent>,
    pub adblock_enabled: Cell<bool>,
    pub popups: RefCell<Vec<gtk::glib::WeakRef<webkit2gtk::WebView>>>,
}

impl PopupHub {
    pub fn new(proxy: EventLoopProxy<UserEvent>, adblock_enabled: bool) -> Self {
        Self {
            proxy,
            adblock_enabled: Cell::new(adblock_enabled),
            popups: RefCell::new(Vec::new()),
        }
    }
}

/// Hook the `create` signal of a content webview.
pub fn attach(view: &webkit2gtk::WebView, hub: &Rc<PopupHub>) {
    let hub = hub.clone();
    view.connect_create(move |view, action| handle_create(view, action, &hub));
}

/// Push the adblock toggle into popup pages that are already open.
pub fn set_popup_adblock(hub: &PopupHub, enabled: bool) {
    hub.adblock_enabled.set(enabled);
    let script = format!(
        "window.__rustywolfSetAdblockEnabled && window.__rustywolfSetAdblockEnabled({enabled});"
    );

    let mut alive = Vec::new();
    for weak in hub.popups.borrow_mut().drain(..) {
        if let Some(view) = weak.upgrade() {
            view.evaluate_javascript(&script, None, None, None::<&gtk::gio::Cancellable>, |_| {});
            alive.push(view.downgrade());
        }
    }
    *hub.popups.borrow_mut() = alive;
}

fn handle_create(
    view: &webkit2gtk::WebView,
    action: &webkit2gtk::NavigationAction,
    hub: &Rc<PopupHub>,
) -> Option<gtk::Widget> {
    let url = action
        .request()
        .and_then(|request| request.uri())
        .map(|uri| uri.to_string())
        .unwrap_or_default();
    let user_gesture = action.is_user_gesture();
    let nav = match action.navigation_type() {
        webkit2gtk::NavigationType::LinkClicked => NavKind::Link,
        webkit2gtk::NavigationType::FormSubmitted | webkit2gtk::NavigationType::FormResubmitted => {
            NavKind::Form
        }
        _ => NavKind::Other,
    };

    match decide_new_window(&url, nav, user_gesture) {
        NewWindowDecision::Deny => None,
        NewWindowDecision::Tab => {
            let _ = hub.proxy.send_event(UserEvent::NewWindow { url });
            None
        }
        NewWindowDecision::Ask => {
            let _ = hub.proxy.send_event(UserEvent::NewWindowAsk { url });
            None
        }
        NewWindowDecision::Popup => create_popup(view, &url, hub),
    }
}

fn create_popup(
    opener: &webkit2gtk::WebView,
    url: &str,
    hub: &Rc<PopupHub>,
) -> Option<gtk::Widget> {
    let view = webkit2gtk::WebView::with_related_view(opener);
    if let Some(settings) = WebViewExt::settings(opener) {
        view.set_settings(&settings);
    }
    install_scripts(&view, hub.adblock_enabled.get());

    let title = url::Url::parse(url)
        .ok()
        .and_then(|parsed| parsed.host_str().map(ToString::to_string))
        .unwrap_or_else(|| "RustyWolf".to_string());
    let window = gtk::Window::new(gtk::WindowType::Toplevel);
    window.set_title(&title);
    window.set_default_size(960, 700);
    window.set_position(gtk::WindowPosition::Center);
    window.add(&view);

    // Popups can spawn popups (SSO hand-offs often do).
    let nested_hub = hub.clone();
    view.connect_create(move |view, action| handle_create(view, action, &nested_hub));

    // Keep the window title in sync with the page.
    let window_weak = window.downgrade();
    view.connect_title_notify(move |view| {
        if let Some(window) = window_weak.upgrade()
            && let Some(title) = view.title()
        {
            window.set_title(&title);
        }
    });

    // Minimal popup shortcuts: Ctrl+W closes, F5 / Ctrl+R reload.
    let view_weak = view.downgrade();
    window.connect_key_press_event(move |window, event| {
        use gtk::gdk::keys::constants as key;
        let ctrl = event.state().contains(gtk::gdk::ModifierType::CONTROL_MASK);
        let keyval = event.keyval();
        if ctrl && keyval == key::w {
            window.close();
            return gtk::glib::Propagation::Stop;
        }
        if keyval == key::F5 || (ctrl && keyval == key::r) {
            if let Some(view) = view_weak.upgrade() {
                view.reload();
            }
            return gtk::glib::Propagation::Stop;
        }
        gtk::glib::Propagation::Proceed
    });

    window.show_all();
    hub.popups.borrow_mut().push(view.downgrade());
    Some(window.upcast())
}

fn install_scripts(view: &webkit2gtk::WebView, adblock_enabled: bool) {
    let Some(manager) = view.user_content_manager() else {
        return;
    };

    let source = format!(
        "{}\nwindow.__rustywolfAdblockInitEnabled = {adblock_enabled};\n{}",
        super::js::PRIVACY_JS,
        super::js::ADBLOCK_JS
    );
    let script = webkit2gtk::UserScript::new(
        &source,
        webkit2gtk::UserContentInjectedFrames::AllFrames,
        webkit2gtk::UserScriptInjectionTime::Start,
        &[],
        &[],
    );
    manager.add_script(&script);
}