#include <glib/gi18n.h>
#include "ag-app.h"
#include "ag-window.h"
#include "ag-chart.h"
#include "ag-preferences.h"
#include "config.h"
#include "astrognome.h"

G_DEFINE_TYPE(AgApp, ag_app, GTK_TYPE_APPLICATION);

GtkWindow *
ag_app_peek_first_window(AgApp *app)
{
    GList *l;

    for (l = gtk_application_get_windows(GTK_APPLICATION(app)); l; l = g_list_next(l)) {
        if (GTK_IS_WINDOW(l->data)) {
            return GTK_WINDOW(l->data);
        }
    }

    ag_app_new_window(app);

    return ag_app_peek_first_window(app);
}

void
ag_app_new_window(AgApp *app)
{
    g_action_group_activate_action(G_ACTION_GROUP(app), "new-window", NULL);
}

void
ag_app_quit(AgApp *app)
{
    g_action_group_activate_action(G_ACTION_GROUP(app), "quit", NULL);
}

void
ag_app_raise(AgApp *app)
{
    g_action_group_activate_action(G_ACTION_GROUP(app), "raise", NULL);
}

static GtkWidget *
ag_app_create_window(AgApp *app)
{
    GtkWidget *window;

    window = ag_window_new(app);
    gtk_application_add_window(GTK_APPLICATION(app), GTK_WINDOW(window));
    gtk_widget_show_all(window);

    return window;
}

static void
new_window_cb(GSimpleAction *action, GVariant *parameter, gpointer user_data)
{
    ag_app_create_window(AG_APP(user_data));
}

static void
preferences_cb(GSimpleAction *action, GVariant *parameter, gpointer user_data)
{
   ag_preferences_show_dialog();
}

static void
about_cb(GSimpleAction *action, GVariant *parameter, gpointer user_data)
{
    const gchar *authors[] = {
        "Gergely Polonkai <gergely@polonkai.eu>",
        "Jean-André Santoni <jean.andre.santoni@gmail.com>",
        NULL
    };

    const gchar **documentors       = NULL;
    const gchar *translator_credits = _("translator_credits");

    /* i18n: Please don't translate "Astrognome" (it's marked as translatable for transliteration only */
    gtk_show_about_dialog(NULL,
                          "name", _("Astrognome"),
                          "version", PACKAGE_VERSION,
                          "comments", _("Astrologers' software for GNOME"),
                          "authors", authors,
                          "documentors", documentors,
                          "translator_credits", ((strcmp(translator_credits, "translator_credits") != 0) ? translator_credits : NULL),
                          "website", PACKAGE_URL,
                          "website-label", _("Astrognome Website"),
                          "logo-icon-name", PACKAGE_TARNAME,
                          NULL);
}

static void
quit_cb(GSimpleAction *action, GVariant *parameter, gpointer user_data)
{
    GList *l;

    while ((l = gtk_application_get_windows(GTK_APPLICATION(user_data)))) {
        gtk_application_remove_window(GTK_APPLICATION(user_data), GTK_WINDOW(l->data));
    }
}

static void
ag_app_open_chart(AgApp *app, GFile *file)
{
    GtkWidget *window;
    AgChart   *chart;
    GError    *err = NULL;
    gchar     *uri;

    if ((chart = ag_chart_load_from_file(file, &err)) == NULL) {
        g_print("Error: '%s'\n", err->message);

        return;
    }

    window = ag_app_create_window(app);
    ag_window_set_chart(AG_WINDOW(window), chart);
    ag_window_update_from_chart(AG_WINDOW(window));
    uri = g_file_get_uri(file);
    ag_window_set_uri(AG_WINDOW(window), uri);
    g_free(uri);
}

static void
open_cb(GSimpleAction *action, GVariant *parameter, gpointer user_data)
{
    gint      response;
    GtkWidget *fs;
    GSList    *filenames = NULL;

    fs = gtk_file_chooser_dialog_new(_("Select charts"),
                                     NULL,
                                     GTK_FILE_CHOOSER_ACTION_OPEN,
                                     _("_Cancel"), GTK_RESPONSE_CANCEL,
                                     _("_Open"), GTK_RESPONSE_ACCEPT,
                                     NULL);
    gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(fs), filter_all);
    gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(fs), filter_chart);
    gtk_file_chooser_set_filter(GTK_FILE_CHOOSER(fs), filter_chart);
    gtk_dialog_set_default_response(GTK_DIALOG(fs), GTK_RESPONSE_ACCEPT);
    gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(fs), TRUE);
    gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(fs), FALSE);

    response = gtk_dialog_run(GTK_DIALOG(fs));

    if (response == GTK_RESPONSE_ACCEPT) {
        filenames = gtk_file_chooser_get_uris(GTK_FILE_CHOOSER(fs));
    }

    if (filenames != NULL) {
        GSList *l;

        for (l = filenames; l; l = g_slist_next(l)) {
            GFile *file;
            char  *data = l->data;

            if (data == NULL) {
                continue;
            }

            file = g_file_new_for_commandline_arg(data);
            ag_app_open_chart(AG_APP(user_data), file);
        }
    }

    gtk_widget_destroy(fs);
}

static void
raise_cb(GSimpleAction *action, GVariant *parameter, gpointer user_data)
{
    AgApp     *app = AG_APP(user_data);
    GtkWindow *window;

    window = ag_app_peek_first_window(app);
    gtk_window_present(window);
}

static void
show_help(const gchar *topic, GtkWindow *parent)
{
    gchar     *uri;
    GdkScreen *screen;
    GError    *err = NULL;

    if (topic) {
        uri = g_strdup_printf("help:astrognome/%s", topic);
    } else {
        uri = g_strdup("help:astrognome");
    }

    if (parent) {
        screen = gtk_widget_get_screen(GTK_WIDGET(parent));
    } else {
        screen = gdk_screen_get_default();
    }

    if (!gtk_show_uri(screen, uri, gtk_get_current_event_time(), &err)) {
        GtkWidget *dialog;

        dialog = gtk_message_dialog_new(parent, GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK, "Unable to display help: %s", err->message);
        gtk_dialog_run(GTK_DIALOG(dialog));
        gtk_widget_destroy(dialog);
    }

    g_free(uri);
}

static void
help_cb(GSimpleAction *action, GVariant *parameter, gpointer user_data)
{
    show_help(NULL, NULL);
}

static GActionEntry app_entries[] = {
    { "new-window",  new_window_cb,  NULL, NULL, NULL },
    { "preferences", preferences_cb, NULL, NULL, NULL },
    { "about",       about_cb,       NULL, NULL, NULL },
    { "quit",        quit_cb,        NULL, NULL, NULL },
    { "raise",       raise_cb,       NULL, NULL, NULL },
    { "open",        open_cb,        NULL, NULL, NULL },
    { "help",        help_cb,        NULL, NULL, NULL },
};

static void
setup_actions(AgApp *app)
{
    g_action_map_add_action_entries(G_ACTION_MAP(app), app_entries, G_N_ELEMENTS(app_entries), app);
}

static void
setup_accelerators(AgApp *app)
{
    gtk_application_add_accelerator(GTK_APPLICATION(app), "<Primary>w",        "win.close",      NULL);
    gtk_application_add_accelerator(GTK_APPLICATION(app), "<Primary>s",        "win.save",       NULL);
    gtk_application_add_accelerator(GTK_APPLICATION(app), "<Primary><Shift>s", "win.save-as",    NULL);
    gtk_application_add_accelerator(GTK_APPLICATION(app), "F10",               "win.gear-menu",  NULL);
    gtk_application_add_accelerator(GTK_APPLICATION(app), "F1",                "app.help",       NULL);
    gtk_application_add_accelerator(GTK_APPLICATION(app), "F5",                "win.change-tab", g_variant_new_string("chart"));
    gtk_application_add_accelerator(GTK_APPLICATION(app), "F9",                "win.change-tab", g_variant_new_string("aspects"));
}

static void
setup_menu(AgApp *app)
{
    GtkBuilder *builder;
    GMenuModel *model;
    GError     *err = NULL;

    builder = gtk_builder_new();

    if (!gtk_builder_add_from_resource(builder, "/eu/polonkai/gergely/astrognome/astrognome.ui", &err)) {
        g_error("%s", (err) ? err->message : "unknown error");
    }

    model = G_MENU_MODEL(gtk_builder_get_object(builder, "app-menu"));
    gtk_application_set_app_menu(GTK_APPLICATION(app), model);

    g_object_unref(builder);
}

static void
startup(GApplication *gapp)
{
    AgApp *app = AG_APP(gapp);

    G_APPLICATION_CLASS(ag_app_parent_class)->startup(gapp);

    setup_actions(app);
    setup_menu(app);
    setup_accelerators(app);
}

static void
ag_app_open(GApplication *gapp, GFile **files, gint n_files, const gchar *hint)
{
    gint i;

    for (i = 0; i < n_files; i++) {
        ag_app_open_chart(AG_APP(gapp), files[i]);
    }
}

void
ag_app_run_action(AgApp *app, gboolean is_remote, const AstrognomeOptions *options)
{
    if (options && options->new_window) {
        if (is_remote) {
            ag_app_new_window(app);
        }
    } else if (options && options->quit) {
        ag_app_quit(app);
    } else if (is_remote) { // Keep this option the last one!
        ag_app_raise(app);
    }
}

static void
application_activate_cb(AgApp *app, gpointer user_data)
{
    ag_app_new_window(app);
    ag_app_run_action(app, FALSE, NULL);
}

AgApp *
ag_app_new(void)
{
    AgApp *app;

    /* i18n: Please don't translate "Astrognome" (it's marked as translatable for transliteration only */
    g_set_application_name(_("Astrognome"));

    app = g_object_new(AG_TYPE_APP,
                       "application-id",   "eu.polonkai.gergely.Astrognome",
                       "flags",            G_APPLICATION_HANDLES_OPEN,
                       "register-session", TRUE,
                       NULL);
    g_signal_connect(app, "activate", G_CALLBACK(application_activate_cb), NULL);

    return app;
}

static void
ag_app_init(AgApp *app)
{
}

static void
ag_app_class_init(AgAppClass *klass)
{
    GApplicationClass *application_class = G_APPLICATION_CLASS(klass);

    application_class->startup = startup;
    application_class->open    = ag_app_open;
}