/*-
 * Copyright (C) 2007-2011  Peter de Ridder <peter@xfce.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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
 */

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

#include <exo/exo.h>
#include <libxfce4util/libxfce4util.h>

#include <subversion-1/svn_client.h>

#include "tsh-common.h"
#include "tsh-tree-common.h"
#include "tsh-log-dialog.h"

static void selection_changed (GtkTreeView*, gpointer);
static void cancel_clicked (GtkButton*, gpointer);
static void refresh_clicked (GtkButton*, gpointer);

static void move_info (GtkTreeStore*, GtkTreeIter*, GtkTreeIter*);

struct _TshLogDialog
{
	GtkDialog dialog;

	GtkWidget *tree_view;
  GtkWidget *text_view;
  GtkWidget *file_view;
  GtkWidget *strict_history;
  GtkWidget *merged_revisions;
	GtkWidget *close;
	GtkWidget *cancel;
	GtkWidget *refresh;

  GSList *message_stack;
};

struct _TshLogDialogClass
{
	GtkDialogClass dialog_class;
};

G_DEFINE_TYPE (TshLogDialog, tsh_log_dialog, GTK_TYPE_DIALOG)

enum {
  SIGNAL_CANCEL = 0,
  SIGNAL_REFRESH,
  SIGNAL_COUNT
};

static guint signals[SIGNAL_COUNT];

static void
tsh_log_dialog_class_init (TshLogDialogClass *klass)
{
  signals[SIGNAL_CANCEL] = g_signal_new("cancel-clicked",
    G_OBJECT_CLASS_TYPE (klass),
    G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
    0, NULL, NULL,
    g_cclosure_marshal_VOID__VOID,
    G_TYPE_NONE, 0);
  signals[SIGNAL_REFRESH] = g_signal_new("refresh-clicked",
    G_OBJECT_CLASS_TYPE (klass),
    G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
    0, NULL, NULL,
    g_cclosure_marshal_VOID__VOID,
    G_TYPE_NONE, 0);
}

enum {
	COLUMN_REVISION = 0,
  COLUMN_AUTHOR,
  COLUMN_DATE,
  COLUMN_MESSAGE,
  COLUMN_FULL_MESSAGE,
  COLUMN_FILE_LIST,
	COLUMN_COUNT
};

enum {
	FILE_COLUMN_ACTION = 0,
  FILE_COLUMN_FILE,
	FILE_COLUMN_COUNT
};

static void
tsh_log_dialog_init (TshLogDialog *dialog)
{
	GtkWidget *button;
	GtkWidget *tree_view;
	GtkWidget *text_view;
	GtkWidget *file_view;
	GtkWidget *scroll_window;
  GtkWidget *pane;
  GtkWidget *vpane;
  GtkWidget *strict_history;
  GtkWidget *merged_revisions;
  GtkWidget *grid;
	GtkCellRenderer *renderer;
	GtkTreeModel *model;
  gint n_columns;

  pane = gtk_paned_new (GTK_ORIENTATION_VERTICAL);

	scroll_window = gtk_scrolled_window_new (NULL, NULL);
	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

	dialog->tree_view = tree_view = gtk_tree_view_new ();

	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
	                                             -1, _("Revision"),
	                                             renderer, "text",
	                                             COLUMN_REVISION, NULL);

	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
	                                             -1, _("Author"),
	                                             renderer, "text",
	                                             COLUMN_AUTHOR, NULL);

	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
	                                             -1, _("Date"),
	                                             renderer, "text",
	                                             COLUMN_DATE, NULL);

	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
	                                             -1, _("Message"),
	                                             renderer, "text",
	                                             COLUMN_MESSAGE, NULL);

  model = GTK_TREE_MODEL (gtk_tree_store_new (COLUMN_COUNT, G_TYPE_LONG, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_POINTER));

	gtk_tree_view_set_model (GTK_TREE_VIEW (tree_view), model);

	g_object_unref (model);

  g_signal_connect (G_OBJECT (tree_view), "cursor-changed", G_CALLBACK (selection_changed), dialog);

	gtk_container_add (GTK_CONTAINER (scroll_window), tree_view);
  gtk_paned_pack1 (GTK_PANED(pane), scroll_window, TRUE, FALSE);
	gtk_widget_show (tree_view);
	gtk_widget_show (scroll_window);

  scroll_window = gtk_scrolled_window_new (NULL, NULL);
  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll_window), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);

  vpane = gtk_paned_new (GTK_ORIENTATION_VERTICAL);

  dialog->text_view = text_view = gtk_text_view_new ();
  gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (text_view), GTK_WRAP_WORD_CHAR);
  gtk_text_view_set_editable (GTK_TEXT_VIEW (text_view), FALSE);

	gtk_container_add (GTK_CONTAINER (scroll_window), text_view);
  gtk_paned_pack1 (GTK_PANED(vpane), scroll_window, TRUE, FALSE);
	gtk_widget_show (text_view);
	gtk_widget_show (scroll_window);

	scroll_window = gtk_scrolled_window_new (NULL, NULL);
	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

	dialog->file_view = file_view = gtk_tree_view_new ();

	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (file_view),
	                                             -1, _("Action"),
	                                             renderer, "text",
	                                             FILE_COLUMN_ACTION, NULL);

  renderer = gtk_cell_renderer_text_new ();
  n_columns = gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (file_view),
                                                           -1, _("Path"),
                                                           renderer, "text",
                                                           FILE_COLUMN_FILE, NULL);
  gtk_tree_view_set_expander_column (GTK_TREE_VIEW (file_view), gtk_tree_view_get_column (GTK_TREE_VIEW (file_view), n_columns - 1));

  model = GTK_TREE_MODEL (gtk_tree_store_new (FILE_COLUMN_COUNT, G_TYPE_STRING, G_TYPE_STRING));

	gtk_tree_view_set_model (GTK_TREE_VIEW (file_view), model);

	g_object_unref (model);

	gtk_container_add (GTK_CONTAINER (scroll_window), file_view);
  gtk_paned_pack2 (GTK_PANED(vpane), scroll_window, TRUE, FALSE);
	gtk_widget_show (file_view);
	gtk_widget_show (scroll_window);

  gtk_paned_pack2 (GTK_PANED(pane), vpane, TRUE, FALSE);
  gtk_widget_show (vpane);

	gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), pane, TRUE, TRUE, 0);
  gtk_widget_show (pane);

  grid = gtk_grid_new ();

  dialog->strict_history = strict_history = gtk_check_button_new_with_label (_("Stop On Copy"));
  gtk_widget_set_hexpand (strict_history, TRUE);
  gtk_grid_attach (GTK_GRID (grid), strict_history, 0, 0, 1, 1);
  gtk_widget_show (strict_history);

  dialog->merged_revisions = merged_revisions = gtk_check_button_new_with_label (_("Show Merged Revisions"));
  gtk_widget_set_hexpand (merged_revisions, TRUE);
  gtk_grid_attach (GTK_GRID (grid), merged_revisions, 1, 0, 1, 1);
  gtk_widget_show (merged_revisions);

  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), grid, FALSE, FALSE, 0);
  gtk_widget_show (grid);

	gtk_window_set_title (GTK_WINDOW (dialog), _("Log"));

  gtk_button_box_set_layout(GTK_BUTTON_BOX (exo_gtk_dialog_get_action_area (GTK_DIALOG (dialog))), GTK_BUTTONBOX_EDGE);

	dialog->cancel = button = gtk_button_new_with_mnemonic (_("_Cancel"));
	gtk_box_pack_start (GTK_BOX (exo_gtk_dialog_get_action_area (GTK_DIALOG (dialog))), button, FALSE, TRUE, 0);
	g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (cancel_clicked), dialog);
	gtk_widget_show (button);

	dialog->refresh = button = gtk_button_new_with_mnemonic (_("_Refresh"));
	gtk_box_pack_start (GTK_BOX (exo_gtk_dialog_get_action_area (GTK_DIALOG (dialog))), button, FALSE, TRUE, 0);
	g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (refresh_clicked), dialog);
	gtk_widget_hide (button);

	dialog->close = button = gtk_dialog_add_button (GTK_DIALOG (dialog), _("_Close"), GTK_RESPONSE_CLOSE);
	gtk_widget_show (button);

	gtk_window_set_default_size (GTK_WINDOW (dialog), 500, 400);
}

GtkWidget*
tsh_log_dialog_new (const gchar *title, GtkWindow *parent, GtkDialogFlags flags)
{
	TshLogDialog *dialog = g_object_new (TSH_TYPE_LOG_DIALOG, NULL);

	if(title)
		gtk_window_set_title (GTK_WINDOW(dialog), title);

	if(parent)
		gtk_window_set_transient_for (GTK_WINDOW(dialog), parent);

	if(flags & GTK_DIALOG_MODAL)
		gtk_window_set_modal (GTK_WINDOW(dialog), TRUE);

	if(flags & GTK_DIALOG_DESTROY_WITH_PARENT)
		gtk_window_set_destroy_with_parent (GTK_WINDOW(dialog), TRUE);

	return GTK_WIDGET(dialog);
}

gchar*
tsh_log_dialog_add (TshLogDialog *dialog, const gchar *parent, GSList *files, glong revision, const char *author, const char *date, const char *message)
{
  GtkTreeModel *model;
  GtkTreeIter iter, parent_iter;
  gchar **lines = NULL;
  gchar **line_iter;
  gchar *first_line = NULL;

  g_return_val_if_fail (TSH_IS_LOG_DIALOG (dialog), NULL);

	model = gtk_tree_view_get_model (GTK_TREE_VIEW (dialog->tree_view));

  if(message)
  {
    lines = g_strsplit_set (message, "\r\n", -1);
    line_iter = lines;
    while (*line_iter)
    {
      if (g_strstrip (*line_iter)[0])
        break;
      line_iter++;
    }
    if (!line_iter)
      line_iter = lines;
    first_line = *line_iter;
  }

  if (parent && !gtk_tree_model_get_iter_from_string (model, &parent_iter, parent))
    parent = NULL;

  gtk_tree_store_append (GTK_TREE_STORE (model), &iter, parent?&parent_iter:NULL);
  gtk_tree_store_set (GTK_TREE_STORE (model), &iter,
                      COLUMN_REVISION, revision,
                      COLUMN_AUTHOR, author,
                      COLUMN_DATE, date,
                      COLUMN_MESSAGE, first_line,
                      COLUMN_FULL_MESSAGE, message,
                      COLUMN_FILE_LIST, files,
                      -1);

  g_strfreev (lines);

  return gtk_tree_model_get_string_from_iter (model, &iter);
}

void
tsh_log_dialog_push (TshLogDialog *dialog, gchar *path)
{
  g_return_if_fail (TSH_IS_LOG_DIALOG (dialog));

  dialog->message_stack = g_slist_prepend (dialog->message_stack, path);
}

const gchar*
tsh_log_dialog_top (TshLogDialog *dialog)
{
  g_return_val_if_fail (TSH_IS_LOG_DIALOG (dialog), NULL);

  if (dialog->message_stack)
    return dialog->message_stack->data;
  return NULL;
}

void
tsh_log_dialog_pop (TshLogDialog *dialog)
{
  g_return_if_fail (TSH_IS_LOG_DIALOG (dialog));
  g_return_if_fail (dialog->message_stack);

  g_free (dialog->message_stack->data);
  dialog->message_stack = g_slist_delete_link (dialog->message_stack, dialog->message_stack);
}

void
tsh_log_dialog_done (TshLogDialog *dialog)
{
  g_return_if_fail (TSH_IS_LOG_DIALOG (dialog));

  if (dialog->message_stack)
  {
    g_slist_free_full (dialog->message_stack, g_free);
    dialog->message_stack = NULL;
  }

  gtk_widget_hide (dialog->cancel);
  gtk_widget_show (dialog->refresh);
}

gboolean
tsh_log_dialog_get_hide_copied (TshLogDialog *dialog)
{
  g_return_val_if_fail (TSH_IS_LOG_DIALOG (dialog), FALSE);

  return gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (dialog->strict_history));
}

gboolean
tsh_log_dialog_get_show_merged (TshLogDialog *dialog)
{
  g_return_val_if_fail (TSH_IS_LOG_DIALOG (dialog), FALSE);

  return gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (dialog->merged_revisions));
}

static void
selection_changed (GtkTreeView *tree_view, gpointer user_data)
{
	GtkTreeIter iter;
  GtkTreeSelection *selection;
  GtkTreeModel *model;
  gchar *message;
  GSList *files;

	TshLogDialog *dialog = TSH_LOG_DIALOG (user_data);

  selection = gtk_tree_view_get_selection (tree_view);

  if (gtk_tree_selection_get_selected (selection, &model, &iter))
  {
    gtk_tree_model_get (model, &iter, COLUMN_FULL_MESSAGE, &message, COLUMN_FILE_LIST, &files, -1);
    gtk_text_buffer_set_text (gtk_text_view_get_buffer (GTK_TEXT_VIEW (dialog->text_view)), message?message:"", -1);
    g_free (message);

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (dialog->file_view));
    gtk_tree_store_clear (GTK_TREE_STORE (model));

    while(files)
    {
      tsh_tree_get_iter_for_path (GTK_TREE_STORE (model), TSH_LOG_FILE (files->data)->file, &iter, FILE_COLUMN_FILE, move_info);
      gtk_tree_store_set (GTK_TREE_STORE (model), &iter,
                          FILE_COLUMN_ACTION, TSH_LOG_FILE (files->data)->action,
                          -1);
      files = files->next;
    }

    gtk_tree_view_expand_all (GTK_TREE_VIEW (dialog->file_view));
  }
}

static void
cancel_clicked (GtkButton *button, gpointer user_data)
{
	TshLogDialog *dialog = TSH_LOG_DIALOG (user_data);

	gtk_widget_hide (dialog->cancel);
	gtk_widget_show (dialog->refresh);

  g_signal_emit (dialog, signals[SIGNAL_CANCEL], 0);
}

static void
refresh_clicked (GtkButton *button, gpointer user_data)
{
	GtkTreeModel *model;
	TshLogDialog *dialog = TSH_LOG_DIALOG (user_data);

	gtk_widget_hide (dialog->refresh);
	gtk_widget_show (dialog->cancel);

  g_signal_emit (dialog, signals[SIGNAL_REFRESH], 0);

	model = gtk_tree_view_get_model (GTK_TREE_VIEW (dialog->tree_view));
  gtk_tree_store_clear (GTK_TREE_STORE (model));

  gtk_text_buffer_set_text (gtk_text_view_get_buffer (GTK_TEXT_VIEW (dialog->text_view)), "", -1);

	model = gtk_tree_view_get_model (GTK_TREE_VIEW (dialog->file_view));
  gtk_tree_store_clear (GTK_TREE_STORE (model));
}

static void
move_info (GtkTreeStore *store, GtkTreeIter *dest, GtkTreeIter *src)
{
  gchar *action;

  gtk_tree_model_get (GTK_TREE_MODEL (store), src,
                      FILE_COLUMN_ACTION, &action,
                      -1);

  gtk_tree_store_set (store, dest,
                      FILE_COLUMN_ACTION, action,
                      -1);

  g_free (action);
}
