// ============================================================
// 闲言APP (WordsLeisure) — my_application.cc
// 创建时间: 2026-04-20
// 更新时间: 2026-05-18
// 作用: Linux平台GTK应用主类实现
// 上次更新: 完善窗口标题/暗色主题/Wayland适配/桌面集成
// ============================================================

#include "my_application.h"

#include <flutter_linux/flutter_linux.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#endif
#ifdef GDK_WINDOWING_WAYLAND
#include <gdk/gdkwayland.h>
#endif

#include "flutter/generated_plugin_registrant.h"

struct _MyApplication {
  GtkApplication parent_instance;
  char** dart_entrypoint_arguments;
};

G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)

static void first_frame_cb(MyApplication* self, FlView *view)
{
  gtk_widget_show(gtk_widget_get_toplevel(GTK_WIDGET(view)));
}

static void my_application_activate(GApplication* application) {
  MyApplication* self = MY_APPLICATION(application);
  GtkWindow* window =
      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));

  gboolean use_header_bar = TRUE;
#ifdef GDK_WINDOWING_X11
  GdkScreen* screen = gtk_window_get_screen(window);
  if (GDK_IS_X11_SCREEN(screen)) {
    const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
    if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
      use_header_bar = FALSE;
    }
  }
#endif
#ifdef GDK_WINDOWING_WAYLAND
  GdkDisplay* display = gdk_display_get_default();
  if (GDK_IS_WAYLAND_DISPLAY(display)) {
    use_header_bar = TRUE;
  }
#endif

  if (use_header_bar) {
    GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
    gtk_widget_show(GTK_WIDGET(header_bar));
    gtk_header_bar_set_title(header_bar, "闲言");
    gtk_header_bar_set_subtitle(header_bar, "文字阅读更纯粹");
    gtk_header_bar_set_show_close_button(header_bar, TRUE);
    gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
  } else {
    gtk_window_set_title(window, "闲言");
  }

  gtk_window_set_default_size(window, 1280, 720);
  gtk_window_set_position(window, GTK_WIN_POS_CENTER);

  GdkGeometry hints;
  hints.min_width = 360;
  hints.min_height = 640;
  gtk_window_set_geometry_hints(window, nullptr, &hints, GDK_HINT_MIN_SIZE);

  g_autoptr(GtkCssProvider*) provider = gtk_css_provider_new();
  gtk_css_provider_load_from_data(provider,
    "window { background-color: #000000; }"
    "headerbar { background-color: #1a1a1a; color: #ffffff; }",
    -1, nullptr);
  gtk_style_context_add_provider_for_screen(
    gtk_window_get_screen(window),
    GTK_STYLE_PROVIDER(provider),
    GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);

  g_autoptr(FlDartProject) project = fl_dart_project_new();
  fl_dart_project_set_dart_entrypoint_arguments(project, self->dart_entrypoint_arguments);

  FlView* view = fl_view_new(project);
  GdkRGBA background_color;
  gdk_rgba_parse(&background_color, "#000000");
  fl_view_set_background_color(view, &background_color);
  gtk_widget_show(GTK_WIDGET(view));
  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));

  g_signal_connect_swapped(view, "first-frame", G_CALLBACK(first_frame_cb), self);
  gtk_widget_realize(GTK_WIDGET(view));

  fl_register_plugins(FL_PLUGIN_REGISTRY(view));

  gtk_widget_grab_focus(GTK_WIDGET(view));
}

static gboolean my_application_local_command_line(GApplication* application, gchar*** arguments, int* exit_status) {
  MyApplication* self = MY_APPLICATION(application);
  self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);

  g_autoptr(GError) error = nullptr;
  if (!g_application_register(application, nullptr, &error)) {
     g_warning("Failed to register: %s", error->message);
     *exit_status = 1;
     return TRUE;
  }

  g_application_activate(application);
  *exit_status = 0;

  return TRUE;
}

static void my_application_startup(GApplication* application) {
  G_APPLICATION_CLASS(my_application_parent_class)->startup(application);

  g_object_set(gtk_settings_get_default(),
    "gtk-application-prefer-dark-theme", TRUE,
    "gtk-icon-theme-name", "Adwaita",
    nullptr);
}

static void my_application_shutdown(GApplication* application) {
  G_APPLICATION_CLASS(my_application_parent_class)->shutdown(application);
}

static void my_application_dispose(GObject* object) {
  MyApplication* self = MY_APPLICATION(object);
  g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
  G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
}

static void my_application_class_init(MyApplicationClass* klass) {
  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
  G_APPLICATION_CLASS(klass)->local_command_line = my_application_local_command_line;
  G_APPLICATION_CLASS(klass)->startup = my_application_startup;
  G_APPLICATION_CLASS(klass)->shutdown = my_application_shutdown;
  G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
}

static void my_application_init(MyApplication* self) {}

MyApplication* my_application_new() {
  g_set_prgname(APPLICATION_ID);

  return MY_APPLICATION(g_object_new(my_application_get_type(),
                                     "application-id", APPLICATION_ID,
                                     "flags", G_APPLICATION_NON_UNIQUE,
                                     nullptr));
}