/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/* fm-error-reporting.h - implementation of file manager functions that report
 			  errors to the user.

   Copyright (C) 2000 Eazel, Inc.

   The Ukui Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The Ukui Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the Ukui Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110-1301, USA.

   Authors: John Sullivan <sullivan@eazel.com>
*/

#include <config.h>
#include "fm-error-reporting.h"

#include <string.h>
#include <glib/gi18n.h>
#include <libpeony-private/peony-debug-log.h>
#include <libpeony-private/peony-file.h>
#include <eel/eel-string.h>
#include <eel/eel-stock-dialogs.h>

#define NEW_NAME_TAG "Peony: new name"
#define MAXIMUM_DISPLAYED_FILE_NAME_LENGTH	50

static void finish_rename (PeonyFile *file, gboolean stop_timer, GError *error);

void
fm_report_error_loading_directory (PeonyFile *file,
                                   GError *error,
                                   GtkWindow *parent_window)
{
    char *file_name;
    char *message;

    if (error == NULL ||
            error->message == NULL)
    {
        return;
    }

    if (error->domain == G_IO_ERROR &&
            error->code == G_IO_ERROR_NOT_MOUNTED)
    {
        /* This case is retried automatically */
        return;
    }

    file_name = peony_file_get_display_name (file);

    if (error->domain == G_IO_ERROR)
    {
        switch (error->code)
        {
        case G_IO_ERROR_PERMISSION_DENIED:
            message = g_strdup_printf (_("You do not have the permissions necessary to view the contents of \"%s\"."),
                                       file_name);
            break;
        case G_IO_ERROR_NOT_FOUND:
            message = g_strdup_printf (_("\"%s\" could not be found. Perhaps it has recently been deleted."),
                                       file_name);
            break;
        default:
            message = g_strdup_printf (_("Sorry, could not display all the contents of \"%s\": %s"), file_name,
                                       error->message);
        }
    }
    else
    {
        message = g_strdup (error->message);
    }

    eel_show_error_dialog (_("The folder contents could not be displayed."), message, parent_window);

    g_free (file_name);
    g_free (message);
}

void
fm_report_error_renaming_file (PeonyFile *file,
                               const char *new_name,
                               GError *error,
                               GtkWindow *parent_window)
{
    char *original_name, *original_name_truncated;
    char *new_name_truncated;
    char *message;

    /* Truncate names for display since very long file names with no spaces
     * in them won't get wrapped, and can create insanely wide dialog boxes.
     */
    original_name = peony_file_get_display_name (file);
    original_name_truncated = eel_str_middle_truncate (original_name, MAXIMUM_DISPLAYED_FILE_NAME_LENGTH);
    g_free (original_name);

    new_name_truncated = eel_str_middle_truncate (new_name, MAXIMUM_DISPLAYED_FILE_NAME_LENGTH);

    message = NULL;
    if (error->domain == G_IO_ERROR)
    {
        switch (error->code)
        {
        case G_IO_ERROR_EXISTS:
            message = g_strdup_printf (_("The name \"%s\" is already used in this folder. "
                                         "Please use a different name."),
                                       new_name_truncated);
            break;
        case G_IO_ERROR_NOT_FOUND:
            message = g_strdup_printf (_("There is no \"%s\" in this folder. "
                                         "Perhaps it was just moved or deleted?"),
                                       original_name_truncated);
            break;
        case G_IO_ERROR_PERMISSION_DENIED:
            message = g_strdup_printf (_("You do not have the permissions necessary to rename \"%s\"."),
                                       original_name_truncated);
            break;
        case G_IO_ERROR_INVALID_FILENAME:
            if (strchr (new_name, '/') != NULL)
            {
                message = g_strdup_printf (_("The name \"%s\" is not valid because it contains the character \"/\". "
                                             "Please use a different name."),
                                           new_name_truncated);
            }
            else
            {
                message = g_strdup_printf (_("The name \"%s\" is not valid. "
                                             "Please use a different name."),
                                           new_name_truncated);
            }
            break;
        default:
            break;
        }
    }

    if (message == NULL)
    {
        /* We should invent decent error messages for every case we actually experience. */
        g_warning ("Hit unhandled case %s:%d in fm_report_error_renaming_file",
                   g_quark_to_string (error->domain), error->code);
        /* fall through */
        message = g_strdup_printf (_("Sorry, could not rename \"%s\" to \"%s\": %s"),
                                   original_name_truncated, new_name_truncated,
                                   error->message);
    }

    g_free (original_name_truncated);
    g_free (new_name_truncated);

    eel_show_error_dialog (_("The item could not be renamed."), message, parent_window);
    g_free (message);
}

void
fm_report_error_setting_group (PeonyFile *file,
                               GError *error,
                               GtkWindow *parent_window)
{
    char *file_name;
    char *message;

    if (error == NULL)
    {
        return;
    }

    file_name = peony_file_get_display_name (file);

    message = NULL;
    if (error->domain == G_IO_ERROR)
    {
        switch (error->code)
        {
        case G_IO_ERROR_PERMISSION_DENIED:
            message = g_strdup_printf (_("You do not have the permissions necessary to change the group of \"%s\"."),
                                       file_name);
            break;
        default:
            break;
        }
    }

    if (message == NULL)
    {
        /* We should invent decent error messages for every case we actually experience. */
        g_warning ("Hit unhandled case %s:%d in fm_report_error_setting_group",
                   g_quark_to_string (error->domain), error->code);
        /* fall through */
        message = g_strdup_printf (_("Sorry, could not change the group of \"%s\": %s"), file_name,
                                   error->message);
    }


    eel_show_error_dialog (_("The group could not be changed."), message, parent_window);

    g_free (file_name);
    g_free (message);
}

void
fm_report_error_setting_owner (PeonyFile *file,
                               GError *error,
                               GtkWindow *parent_window)
{
    char *file_name;
    char *message;

    if (error == NULL)
    {
        return;
    }

    file_name = peony_file_get_display_name (file);

    message = g_strdup_printf (_("Sorry, could not change the owner of \"%s\": %s"), file_name, error->message);

    eel_show_error_dialog (_("The owner could not be changed."), message, parent_window);

    g_free (file_name);
    g_free (message);
}

void
fm_report_error_setting_permissions (PeonyFile *file,
                                     GError *error,
                                     GtkWindow *parent_window)
{
    char *file_name;
    char *message;

    if (error == NULL)
    {
        return;
    }

    file_name = peony_file_get_display_name (file);

    message = g_strdup_printf (_("Sorry, could not change the permissions of \"%s\": %s"), file_name, error->message);

    eel_show_error_dialog (_("The permissions could not be changed."), message, parent_window);

    g_free (file_name);
    g_free (message);
}

typedef struct _FMRenameData
{
    char *name;
    PeonyFileOperationCallback callback;
    gpointer callback_data;
} FMRenameData;

static void
fm_rename_data_free (FMRenameData *data)
{
    g_free (data->name);
    g_free (data);
}

static void
rename_callback (PeonyFile *file, GFile *result_location,
                 GError *error, gpointer callback_data)
{
    FMRenameData *data;

    g_assert (PEONY_IS_FILE (file));
    g_assert (callback_data == NULL);

    data = g_object_get_data (G_OBJECT (file), NEW_NAME_TAG);
    g_assert (data != NULL);

    if (error &&
            !(error->domain == G_IO_ERROR && error->code == G_IO_ERROR_CANCELLED))
    {
        /* If rename failed, notify the user. */
        fm_report_error_renaming_file (file, data->name, error, NULL);
    }

    finish_rename (file, TRUE, error);
}

static void
cancel_rename_callback (gpointer callback_data)
{
    GError *error;

    error = g_error_new (G_IO_ERROR, G_IO_ERROR_CANCELLED, "Cancelled");
    finish_rename (PEONY_FILE (callback_data), FALSE, error);
    g_error_free (error);
}

static void
finish_rename (PeonyFile *file, gboolean stop_timer, GError *error)
{
    FMRenameData *data;

    data = g_object_get_data (G_OBJECT (file), NEW_NAME_TAG);
    if (data == NULL)
    {
        return;
    }

    /* Cancel both the rename and the timed wait. */
    peony_file_cancel (file, rename_callback, NULL);
    if (stop_timer)
    {
        eel_timed_wait_stop (cancel_rename_callback, file);
    }

    if (data->callback != NULL)
    {
        data->callback (file, NULL, error, data->callback_data);
    }

    /* Let go of file name. */
    g_object_set_data (G_OBJECT (file), NEW_NAME_TAG, NULL);
}

void
fm_rename_file (PeonyFile *file,
                const char *new_name,
                PeonyFileOperationCallback callback,
                gpointer callback_data)
{
    char *old_name, *wait_message;
    FMRenameData *data;
    char *uri;
    GError *error;

    g_return_if_fail (PEONY_IS_FILE (file));
    g_return_if_fail (new_name != NULL);

    /* Stop any earlier rename that's already in progress. */
    error = g_error_new (G_IO_ERROR, G_IO_ERROR_CANCELLED, "Cancelled");
    finish_rename (file, TRUE, error);
    g_error_free (error);

    data = g_new0 (FMRenameData, 1);
    data->name = g_strdup (new_name);
    data->callback = callback;
    data->callback_data = callback_data;

    /* Attach the new name to the file. */
    g_object_set_data_full (G_OBJECT (file),
                            NEW_NAME_TAG,
                            data, (GDestroyNotify)fm_rename_data_free);

    /* Start the timed wait to cancel the rename. */
    old_name = peony_file_get_display_name (file);
    wait_message = g_strdup_printf (_("Renaming \"%s\" to \"%s\"."),
                                    old_name,
                                    new_name);
    g_free (old_name);
    eel_timed_wait_start (cancel_rename_callback, file, wait_message,
                          NULL); /* FIXME bugzilla.gnome.org 42395: Parent this? */
    g_free (wait_message);

    uri = peony_file_get_uri (file);
    peony_debug_log (FALSE, PEONY_DEBUG_LOG_DOMAIN_USER,
                    "rename file old=\"%s\", new=\"%s\"",
                    uri, new_name);
    g_free (uri);

    /* Start the rename. */
    peony_file_rename (file, new_name,
                      rename_callback, NULL);
}
