/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* tasks-control.c
 *
 * Copyright (C) 2000, 2001, 2002, 2003  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors: Damon Chaplin <damon@ximian.com>
 *      Ettore Perazzoli
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gtk/gtksignal.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkcheckbutton.h>
#include <gtk/gtkmessagedialog.h>
#include <libgnome/gnome-i18n.h>
#include <libgnome/gnome-util.h>
#include <libgnomeui/gnome-dialog.h>
#include <libgnomeui/gnome-dialog-util.h>
#include <libgnomeui/gnome-stock-icons.h>
#include <libgnomeprint/gnome-print.h>
#include <libgnomeprint/gnome-print-paper.h>
#include <libgnomeprint/gnome-print-job.h>
#include <libgnomeprintui/gnome-print-job-preview.h>
#include <libgnomeprintui/gnome-print-paper-selector.h>
#include <libgnomeprintui/gnome-print-preview.h>
#include <libgnomeprintui/gnome-print-dialog.h>
#include <bonobo/bonobo-control.h>
#include <bonobo/bonobo-ui-util.h>
#include <e-util/e-dialog-utils.h>
#include <e-util/e-print.h>
#include "dialogs/cal-prefs-dialog.h"
#include "calendar-config.h"
#include "calendar-commands.h"
#include "e-tasks.h"
#include "e-calendar-table.h"
#include "print.h"
#include "tasks-control.h"
#include "evolution-shell-component-utils.h"
#include "e-util/e-menu.h"
#include "e-cal-menu.h"
#include "e-util/e-menu.h"
#include "itip-utils.h"

#define FIXED_MARGIN                            .05


static void tasks_control_activate_cb       (BonoboControl      *control,
                         gboolean        activate,
                         gpointer        user_data);
static void tasks_control_open_task_cmd     (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path);
static void tasks_control_new_task_cmd      (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path);
static void tasks_control_cut_cmd               (BonoboUIComponent      *uic,
                         gpointer                data,
                         const gchar            *path);
static void tasks_control_copy_cmd              (BonoboUIComponent      *uic,
                         gpointer                data,
                         const gchar            *path);
static void tasks_control_paste_cmd             (BonoboUIComponent      *uic,
                         gpointer                data,
                         const gchar            *path);
static void tasks_control_delete_cmd        (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path);
static void tasks_control_complete_cmd      (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path);
static void tasks_control_purge_cmd     (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path);
static void tasks_control_print_cmd     (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path);
static void tasks_control_print_preview_cmd (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path);
static void tasks_control_assign_cmd           (BonoboUIComponent      *uic,
                                                gpointer               data,
                                                const char             *path);

static void tasks_control_forward_cmd          (BonoboUIComponent      *uic,
                                                gpointer               data,
                                                const char             *path);

static void tasks_control_view_preview         (BonoboUIComponent *uic, 
                        const char *path, 
                        Bonobo_UIComponent_EventType type, 
                        const char *state, 
                        void *data);
      
BonoboControl *
tasks_control_new (void)
{
    BonoboControl *control;
    GtkWidget *tasks;

    tasks = e_tasks_new ();
    if (!tasks)
        return NULL;
    gtk_widget_show (tasks);

    control = bonobo_control_new (tasks);
    if (!control) {
        gtk_widget_destroy (tasks);
        g_message ("control_factory_fn(): could not create the control!");
        return NULL;
    }

    g_signal_connect (control, "activate", G_CALLBACK (tasks_control_activate_cb), tasks);

    return control;
}


static void
tasks_control_activate_cb       (BonoboControl      *control,
                     gboolean        activate,
                     gpointer        user_data)
{
    ETasks *tasks;

    tasks = E_TASKS (user_data);

    if (activate)
        tasks_control_activate (control, tasks);
    else
        tasks_control_deactivate (control, tasks);
}

struct _tasks_sensitize_item {
    char *command;
    guint32 enable;
};

static void
sensitize_items(BonoboUIComponent *uic, struct _tasks_sensitize_item *items, guint32 mask)
{
    while (items->command) {
        char command[32];

        g_assert(strlen(items->command)<21);
        sprintf(command, "/commands/%s", items->command);

        bonobo_ui_component_set_prop (uic, command, "sensitive",
                          (items->enable & mask) == 0 ? "1" : "0",
                          NULL);
        items++;
    }
}

static struct _tasks_sensitize_item tasks_sensitize_table[] = {
    { "TasksOpenTask", E_CAL_MENU_SELECT_ONE },
    { "TasksCut", E_CAL_MENU_SELECT_ANY | E_CAL_MENU_SELECT_EDITABLE },
    { "TasksCopy", E_CAL_MENU_SELECT_ANY },
    { "TasksPaste", E_CAL_MENU_SELECT_EDITABLE },
    { "TasksDelete", E_CAL_MENU_SELECT_ANY | E_CAL_MENU_SELECT_EDITABLE },
    { "TasksMarkComplete", E_CAL_MENU_SELECT_ANY | E_CAL_MENU_SELECT_EDITABLE | E_CAL_MENU_SELECT_NOTCOMPLETE},
    { "TasksPurge",  E_CAL_MENU_SELECT_EDITABLE },
    { "TasksAssign", E_CAL_MENU_SELECT_ONE | E_CAL_MENU_SELECT_EDITABLE | E_CAL_MENU_SELECT_ASSIGNABLE },
    { "TasksForward", E_CAL_MENU_SELECT_ONE },
    { 0 }
};

/* Sensitizes the UI Component menu/toolbar commands based on the number of
 * selected tasks.
 */
void
tasks_control_sensitize_commands (BonoboControl *control, ETasks *tasks, int n_selected)
{
    BonoboUIComponent *uic;
    gboolean read_only = TRUE;
    ECal *ecal;
    ECalModel *model;
    ECalMenu *menu;
    ECalMenuTargetSelect *t;
    GPtrArray *events;
    GSList *selected = NULL, *l = NULL;
    ECalendarTable *cal_table;

    uic = bonobo_control_get_ui_component (control);
    g_assert (uic != NULL);

    if (bonobo_ui_component_get_container (uic) == CORBA_OBJECT_NIL)
        return;

    menu = e_tasks_get_tasks_menu (tasks);
    cal_table = e_tasks_get_calendar_table (tasks);
    model = e_calendar_table_get_model (cal_table);
    events = g_ptr_array_new ();
    selected = e_calendar_table_get_selected (cal_table);

    for (l = selected;l;l = g_slist_next (l)) {
        g_ptr_array_add (events, e_cal_model_copy_component_data ((ECalModelComponent *)l->data));
    }

    g_slist_free (selected);

    t = e_cal_menu_target_new_select (menu, model, events);

    ecal = e_cal_model_get_default_client (model);

    if (ecal) 
        e_cal_is_read_only (ecal, &read_only, NULL);
        
    sensitize_items (uic, tasks_sensitize_table, t->target.mask);
    e_menu_update_target ((EMenu *)menu, (EMenuTarget *)t);
}

/* Callback used when the selection in the table changes */
static void
selection_changed_cb (ETasks *tasks, int n_selected, gpointer data)
{
    BonoboControl *control;

    control = BONOBO_CONTROL (data);

    tasks_control_sensitize_commands (control, tasks, n_selected);
}

static BonoboUIVerb verbs [] = {
    BONOBO_UI_VERB ("TasksOpenTask", tasks_control_open_task_cmd),
    BONOBO_UI_VERB ("TasksNewTask", tasks_control_new_task_cmd),
    BONOBO_UI_VERB ("TasksCut", tasks_control_cut_cmd),
    BONOBO_UI_VERB ("TasksCopy", tasks_control_copy_cmd),
    BONOBO_UI_VERB ("TasksPaste", tasks_control_paste_cmd),
    BONOBO_UI_VERB ("TasksDelete", tasks_control_delete_cmd),
    BONOBO_UI_VERB ("TasksMarkComplete", tasks_control_complete_cmd),
    BONOBO_UI_VERB ("TasksPurge", tasks_control_purge_cmd),
    BONOBO_UI_VERB ("TasksPrint", tasks_control_print_cmd),
    BONOBO_UI_VERB ("TasksPrintPreview", tasks_control_print_preview_cmd),
    BONOBO_UI_VERB ("TasksAssign", tasks_control_assign_cmd),
        BONOBO_UI_VERB ("TasksForward", tasks_control_forward_cmd),
        BONOBO_UI_VERB ("ViewPreview", tasks_control_view_preview),
    BONOBO_UI_VERB_END
};

void
tasks_control_activate (BonoboControl *control, ETasks *tasks)
{
    Bonobo_UIContainer remote_uih;
    BonoboUIComponent *uic;
    int n_selected;
    ECalendarTable *cal_table;
    ETable *etable;
    gboolean state;

    uic = bonobo_control_get_ui_component (control);
    g_assert (uic != NULL);

    remote_uih = bonobo_control_get_remote_ui_container (control, NULL);
    bonobo_ui_component_set_container (uic, remote_uih, NULL);
    bonobo_object_release_unref (remote_uih, NULL);

    e_tasks_set_ui_component (tasks, uic);

    bonobo_ui_component_add_verb_list_with_data (uic, verbs, tasks);

    bonobo_ui_component_freeze (uic, NULL);

    bonobo_ui_util_set_ui (uic, PREFIX,
                   EVOLUTION_UIDIR "/evolution-tasks.xml",
                   "evolution-tasks",
                   NULL);

    e_tasks_setup_view_menus (tasks, uic);

    /* Signals from the tasks widget; also sensitize the menu items as appropriate */

    g_signal_connect (tasks, "selection_changed", G_CALLBACK (selection_changed_cb), control);

    e_menu_activate ((EMenu *)e_tasks_get_tasks_menu (tasks), uic, 1);
    cal_table = e_tasks_get_calendar_table (tasks);
    etable = e_calendar_table_get_table (cal_table);
    n_selected = e_table_selected_count (etable);

    tasks_control_sensitize_commands (control, tasks, n_selected);

    state = calendar_config_get_preview_state();

    bonobo_ui_component_thaw (uic, NULL);
    
    bonobo_ui_component_add_listener(uic, "ViewPreview", tasks_control_view_preview, tasks);
    bonobo_ui_component_set_prop(uic, "/commands/ViewPreview", "state", state?"1":"0", NULL);
    /* Show the dialog for setting the timezone if the user hasn't chosen
       a default timezone already. This is done in the startup wizard now,
       so we don't do it here. */
#if 0
    calendar_config_check_timezone_set ();
#endif
}


void
tasks_control_deactivate (BonoboControl *control, ETasks *tasks)
{
    BonoboUIComponent *uic = bonobo_control_get_ui_component (control);

    g_assert (uic != NULL);

    e_menu_activate ((EMenu *)e_tasks_get_tasks_menu (tasks), uic, 0);
    e_tasks_set_ui_component (tasks, NULL);

    e_tasks_discard_view_menus (tasks);

    /* Stop monitoring the "selection_changed" signal */
    g_signal_handlers_disconnect_matched (tasks, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, control);

    bonobo_ui_component_rm (uic, "/", NULL);
    bonobo_ui_component_unset_container (uic, NULL);
}

static void tasks_control_open_task_cmd     (BonoboUIComponent  *uic,
                         gpointer        data,
                         const char     *path)
{
    ETasks *tasks;

    tasks = E_TASKS (data);
    e_tasks_open_task (tasks);
}

static void
tasks_control_new_task_cmd      (BonoboUIComponent  *uic,
                     gpointer        data,
                     const char     *path)
{
    ETasks *tasks;

    tasks = E_TASKS (data);
    e_tasks_new_task (tasks);
}

static void
tasks_control_cut_cmd                   (BonoboUIComponent      *uic,
                     gpointer                data,
                     const char             *path)
{
    ETasks *tasks;
    ECalendarTable *cal_table;

    tasks = E_TASKS (data);
    cal_table = e_tasks_get_calendar_table (tasks);
    e_calendar_table_cut_clipboard (cal_table);
}

static void
tasks_control_copy_cmd                  (BonoboUIComponent      *uic,
                     gpointer                data,
                     const char             *path)
{
    ETasks *tasks;
    ECalendarTable *cal_table;

    tasks = E_TASKS (data);
    cal_table = e_tasks_get_calendar_table (tasks);
    e_calendar_table_copy_clipboard (cal_table);
}

static void
tasks_control_paste_cmd                 (BonoboUIComponent      *uic,
                     gpointer                data,
                     const char             *path)
{
    ETasks *tasks;
    ECalendarTable *cal_table;

    tasks = E_TASKS (data);
    cal_table = e_tasks_get_calendar_table (tasks);
    e_calendar_table_paste_clipboard (cal_table);
}

static void
tasks_control_delete_cmd        (BonoboUIComponent  *uic,
                     gpointer        data,
                     const char     *path)
{
    ETasks *tasks;

    tasks = E_TASKS (data);
    e_tasks_delete_selected (tasks);
}

static void
tasks_control_complete_cmd      (BonoboUIComponent  *uic,
                     gpointer        data,
                     const char     *path)
{
    ETasks *tasks;

    tasks = E_TASKS (data);
    e_tasks_complete_selected (tasks);
}

static gboolean
confirm_purge (ETasks *tasks)
{
    GtkWidget *dialog, *checkbox, *parent;
    int button;
    
    if (!calendar_config_get_confirm_purge ())
        return TRUE;

    parent = gtk_widget_get_toplevel (GTK_WIDGET (tasks));
    dialog = gtk_message_dialog_new (
        (GtkWindow *)parent,
        GTK_DIALOG_DESTROY_WITH_PARENT,
        GTK_MESSAGE_WARNING,
        GTK_BUTTONS_YES_NO,
        _("This operation will permanently erase all tasks marked as completed. If you continue, you will not be able to recover these tasks.\n\nReally erase these tasks?"));
    gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_NO);

    checkbox = gtk_check_button_new_with_label (_("Do not ask me again."));
    gtk_widget_show (checkbox);
    gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), checkbox, TRUE, TRUE, 6);
    
    button = gtk_dialog_run (GTK_DIALOG (dialog));  
    if (button == GTK_RESPONSE_YES && gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (checkbox)))
        calendar_config_set_confirm_purge (FALSE);
    gtk_widget_destroy (dialog);
    
    return button == GTK_RESPONSE_YES ? TRUE : FALSE;
}

static void
tasks_control_purge_cmd (BonoboUIComponent  *uic,
             gpointer        data,
             const char     *path)
{
    ETasks *tasks;

    tasks = E_TASKS (data);
    if (confirm_purge (tasks))
        e_tasks_delete_completed (tasks);
}


static void
print_tasks (ETasks *tasks, gboolean preview)
{
    ECalendarTable *cal_table;
    ETable *etable;

    cal_table = e_tasks_get_calendar_table (tasks);
    etable = e_calendar_table_get_table (E_CALENDAR_TABLE (cal_table));

    print_table (etable, _("Print Tasks"), _("Tasks"), preview);
}

/* File/Print callback */
static void
tasks_control_print_cmd (BonoboUIComponent *uic,
             gpointer data,
             const char *path)
{
    ETasks *tasks;

    tasks = E_TASKS (data);

    print_tasks (tasks, FALSE);
}

static void
tasks_control_print_preview_cmd (BonoboUIComponent *uic,
                 gpointer data,
                 const char *path)
{
    ETasks *tasks;

    tasks = E_TASKS (data);

    print_tasks (tasks, TRUE);
}

static void
tasks_control_assign_cmd (BonoboUIComponent *uic,
                         gpointer data,
                         const char *path)
{
              ETasks *tasks;
              ECalendarTable *cal_table;
              ECalModelComponent *comp_data;

              tasks = E_TASKS (data);
              cal_table = e_tasks_get_calendar_table (tasks);
              comp_data = e_calendar_table_get_selected_comp (cal_table);
           if (comp_data)
              e_calendar_table_open_task (cal_table, comp_data, TRUE);
}

static void
tasks_control_forward_cmd (BonoboUIComponent *uic,
                         gpointer data,
                          const char *path)
{
            ETasks *tasks;
               ECalendarTable *cal_table;
               ECalModelComponent *comp_data;
    
               tasks = E_TASKS (data);
               cal_table = e_tasks_get_calendar_table (tasks);
               comp_data = e_calendar_table_get_selected_comp (cal_table);
               if (comp_data) {
                       ECalComponent *comp;
                       comp = e_cal_component_new ();
                       e_cal_component_set_icalcomponent (comp, icalcomponent_new_clone (comp_data->icalcomp));
                       itip_send_comp (E_CAL_COMPONENT_METHOD_PUBLISH, comp, comp_data->client, NULL, NULL);
                       g_object_unref (comp);
           }
}

static void
tasks_control_view_preview (BonoboUIComponent *uic, const char *path, Bonobo_UIComponent_EventType type, const char *state, void *data)
{
        ETasks *tasks;

    if (type != Bonobo_UIComponent_STATE_CHANGED)
        return;
    
    tasks = E_TASKS (data);

    calendar_config_set_preview_state (state[0] != '0');
    e_tasks_show_preview (tasks, state[0] != '0');
}