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

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include <gtk/gtk.h>
#include <glade/glade.h>
#include <gtksourceview/gtksourceview.h>
#include <gtksourceview/gtksourcelanguage.h>
#include <gtksourceview/gtksourcelanguage.h>
#include <gtksourceview/gtksourcelanguagesmanager.h>
#include <gtksourceview/gtksourcetag.h>

#include "../gm-app.h"
#include "gm-preferences-dialog.h"
#include "../widgets/gm-editor-view.h"
#include "../gm-support.h"
#include "../gm-debug.h"
#include "../gm-options.h"
#include "../gm-color-table.h"

void gm_preferences_dialog_run_dialog();

void on_gm_preferences_dialog_check_button_embed_editor_clicked(
		GtkButton *button, gpointer user_data);
void on_gm_preferences_dialog_check_button_alt_editor_clicked(
		GtkButton *button, gpointer user_data);

void on_gm_preferences_dialog_combo_box_scheme_changed(GtkComboBox *box,
		gpointer user_data);
void on_gm_preferences_dialog_check_button_fg_clicked(
		GtkButton *button, gpointer user_data);
void on_gm_preferences_dialog_check_button_bg_clicked(
		GtkButton *button, gpointer user_data);
void on_gm_preferences_dialog_toggle_button_style_clicked(
		GtkButton *button, gpointer user_data);

void on_gm_preferences_dialog_tree_view_editor_colors_row_changed(
		GtkTreeSelection *selection, gpointer data);
void on_gm_preferences_dialog_response(GtkDialog *dialog, gint response,
		gpointer user_data);

void gm_preferences_dialog_load_colors();

typedef struct _GmPreferencesDialog {
	GladeXML *xml;
	GtkWidget *dialog;
	
} GmPreferencesDialog;

static const GmKeyValuePair color_mapping[] = {
	{"color_button_fg_default", "fg_default"},
	{"color_button_fg_default_h", "fg_default_h"},
	{"color_button_bg_default", "bg_default"},

	{"color_button_fg_black", "fg_black"},
	{"color_button_fg_black_h", "fg_black_h"},
	{"color_button_fg_red", "fg_red"},
	{"color_button_fg_red_h", "fg_red_h"},
	{"color_button_fg_green", "fg_green"},
	{"color_button_fg_green_h", "fg_green_h"},
	{"color_button_fg_yellow", "fg_yellow"},
	{"color_button_fg_yellow_h", "fg_yellow_h"},
	{"color_button_fg_blue", "fg_blue"},
	{"color_button_fg_blue_h", "fg_blue_h"},
	{"color_button_fg_purple", "fg_purple"},
	{"color_button_fg_purple_h", "fg_purple_h"},
	{"color_button_fg_cyan", "fg_cyan"},
	{"color_button_fg_cyan_h", "fg_cyan_h"},
	{"color_button_fg_white", "fg_white"},
	{"color_button_fg_white_h", "fg_white_h"},

	{"color_button_bg_black", "bg_black"},
	{"color_button_bg_red", "bg_red"},
	{"color_button_bg_green", "bg_green"},
	{"color_button_bg_yellow", "bg_yellow"},
	{"color_button_bg_blue", "bg_blue"},
	{"color_button_bg_purple", "bg_purple"},
	{"color_button_bg_cyan", "bg_cyan"},
	{"color_button_bg_white", "bg_white"}
};

static const GmKeyValuePair color_schemes[] = {
	{N_("Default"), "default"},
	{N_("White on black"), "white_on_black"},
	{N_("User defined"), "user"},
	{NULL, NULL}
};

static GmPreferencesDialog *preferences = NULL;

enum {
	SCHEME_NAME,
	SCHEME_OPTION,
	SCHEME_N_COLUMNS
};

GtkWidget *
gm_preferences_dialog_widget(gchar *name) {
	return glade_xml_get_widget(preferences->xml, name);
}

void
gm_preferences_dialog_init_combo_box_scheme() {
	GtkComboBox *box = GTK_COMBO_BOX(gm_preferences_dialog_widget(
			"combo_box_scheme"));
	GtkListStore *store = gtk_list_store_new(SCHEME_N_COLUMNS, G_TYPE_STRING,
			G_TYPE_STRING);
	GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
	GtkTreeIter iter;
	int i, select = 0;
	const gchar *scheme = gm_options_get(gm_app_options(gm_app_instance()), 
			"color_scheme");
	
	gtk_cell_layout_clear(GTK_CELL_LAYOUT(box));
	gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(box), renderer, TRUE);
	gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(box), renderer, "text",
		SCHEME_NAME, NULL);
	
	gtk_combo_box_set_model(box, GTK_TREE_MODEL(store));
	
	i = 0;
	
	while (color_schemes[i].key != NULL) {
		gtk_list_store_append(store, &iter);
		gtk_list_store_set(store, &iter, SCHEME_NAME, color_schemes[i].key,
				SCHEME_OPTION, color_schemes[i].value, -1);
		
		if (scheme != NULL && strcasecmp(scheme, color_schemes[i].value) == 0) {
			select = i;
		}
		
		++i;
	}
	
	gtk_combo_box_set_active(box, select);
}

#define GM_PREFERENCES_DIALOG_XML \
		PACKAGE_DATA_DIR "/" PACKAGE "/ui/gm-preferences.glade"

void
gm_preferences_dialog_run() {
	const gchar *alt_editor;
	GmOptions *options = gm_app_options(gm_app_instance());
	
	if (preferences != NULL) {
		gtk_window_present(GTK_WINDOW(preferences->dialog));
		return;
	} else {
		preferences = g_new0(GmPreferencesDialog, 1);
	}
	
	preferences->xml = glade_xml_new(GM_PREFERENCES_DIALOG_XML, 
			"gm_preferences_dialog", NULL);
	preferences->dialog = 
			gm_preferences_dialog_widget("gm_preferences_dialog");

	gm_preferences_dialog_load_colors();
	gm_preferences_dialog_init_combo_box_scheme();
	
	gtk_font_button_set_font_name(GTK_FONT_BUTTON(
			gm_preferences_dialog_widget("font_button_font")),
			gm_options_get(options, "font-family"));

	alt_editor = gm_options_get(options, "editor_alternative");

	if (strcmp(alt_editor, "0") == 0) {
		alt_editor = NULL;
	} else {
		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(
				gm_preferences_dialog_widget("check_button_alt_editor")), 
				TRUE);
		gtk_entry_set_text(GTK_ENTRY(
				gm_preferences_dialog_widget("entry_alt_editor")),
				alt_editor);
	}
  
	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(
			gm_preferences_dialog_widget("check_button_embed_editor")), 
			gm_options_get_int(options, "editor_embed"));
	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(
			gm_preferences_dialog_widget("check_button_needs_terminal")), 
			gm_options_get_int(options, "editor_needs_terminal"));

	gtk_widget_set_sensitive(
			gm_preferences_dialog_widget("entry_alt_editor"),
			alt_editor != NULL);
	gtk_widget_set_sensitive(
			gm_preferences_dialog_widget("check_button_embed_editor"),
			alt_editor != NULL);
	gtk_widget_set_sensitive(
			gm_preferences_dialog_widget("check_button_needs_terminal"),
			alt_editor != NULL
			&& gm_options_get_int(options, "editor_embed") == 0);

	glade_xml_signal_connect(preferences->xml, 
			"on_check_button_alt_editor_clicked", G_CALLBACK(
			on_gm_preferences_dialog_check_button_alt_editor_clicked));
	glade_xml_signal_connect(preferences->xml, 
			"on_check_button_embed_editor_clicked", G_CALLBACK(
			on_gm_preferences_dialog_check_button_embed_editor_clicked));

	glade_xml_signal_connect(preferences->xml,
			"on_combo_box_scheme_changed", G_CALLBACK(
			on_gm_preferences_dialog_combo_box_scheme_changed));
			
	gm_preferences_dialog_run_dialog();
}

void 
gm_preferences_dialog_load_colors() {
	int i;
	GtkColorButton *but;
	GdkColor col;
	GmColorTable *color_table = gm_app_color_table(gm_app_instance());
  
	for (i = 0; i < (int)(sizeof(color_mapping) / sizeof(GmKeyValuePair)); i++) {
		but = GTK_COLOR_BUTTON(gm_preferences_dialog_widget(
				color_mapping[i].key));

		gm_color_table_get(color_table, color_mapping[i].value, &col);
		gtk_color_button_set_color(but, &col);
	}
}

void
gm_preferences_dialog_save_colors() {
	int i;
	GtkColorButton *but;
	GdkColor col;
	GmColorTable *color_table = gm_app_color_table(gm_app_instance());
	gchar *col_str;

	for (i = 0; i < (int)(sizeof(color_mapping) / sizeof(GmKeyValuePair)); i++) {
		but = GTK_COLOR_BUTTON(gm_preferences_dialog_widget(
				color_mapping[i].key));

		gtk_color_button_get_color(but, &col);
		col_str = g_strdup_printf("#%04X%04X%04X", col.red, col.green, 
				col.blue);

		gm_color_table_set(color_table, color_mapping[i].value, col_str);
		g_free(col_str);
	}
}

gboolean
gm_preferences_dialog_check_values() {
	const gchar *alt_editor = gtk_entry_get_text(GTK_ENTRY(
			gm_preferences_dialog_widget("entry_alt_editor")));
	const gchar *font_description = gtk_font_button_get_font_name(
			GTK_FONT_BUTTON(gm_preferences_dialog_widget("font_button_font")));
	gboolean use_alt_editor = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(
			gm_preferences_dialog_widget("check_button_alt_editor")));
	GmOptions *options = gm_app_options(gm_app_instance());
	
	if (use_alt_editor && *alt_editor == '\0') {
		gm_error_dialog(_("Editor can't be empty, enter a non empty command"),
				GTK_WINDOW(preferences->dialog));
		gm_notebook_focus_from_label(GTK_NOTEBOOK(gm_preferences_dialog_widget(
				"notebook_preferences")),  _("Editor"));
		gtk_widget_grab_focus(gm_preferences_dialog_widget("entry_alt_editor"));

		return FALSE;
	}

	if (use_alt_editor) {
		gm_options_set(options, "editor_alternative", alt_editor);
	} else {
		gm_options_set(options, "editor_alternative", "0");
	}

	gm_options_set_int(options, "editor_embed", gtk_toggle_button_get_active(
			GTK_TOGGLE_BUTTON(gm_preferences_dialog_widget
			("check_button_embed_editor"))));
	gm_options_set_int(options, "editor_needs_terminal", 
			gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(
			gm_preferences_dialog_widget("check_button_needs_terminal"))));

	gm_options_set(options, "font-family", font_description);
	gm_preferences_dialog_save_colors();
  
	return TRUE;
}

void
gm_preferences_dialog_run_dialog() {
	g_signal_connect(preferences->dialog, "response",
			G_CALLBACK(on_gm_preferences_dialog_response), NULL);

	gtk_widget_show(GTK_WIDGET(preferences->dialog));
}

/* CALLBACKS */

void
on_gm_preferences_dialog_response(GtkDialog *dialog, gint response,
		gpointer user_data) {
	gboolean is_okay = TRUE;
  
	switch (response) {
		case GTK_RESPONSE_OK: case GTK_RESPONSE_APPLY:
			if (gm_preferences_dialog_check_values()) {
				gm_options_save(gm_app_options(gm_app_instance()));
			
			if (response == GTK_RESPONSE_APPLY) {
				is_okay = FALSE;
			}
		} else {
			is_okay = FALSE;
		}
		break;
		default:
		break;
	}
	
	if (is_okay) {
		gtk_widget_destroy(GTK_WIDGET(dialog));
		g_object_unref(preferences->xml);
		g_free(preferences);
		preferences = NULL;
	}
}

void
on_gm_preferences_dialog_check_button_embed_editor_clicked(
		GtkButton *button, gpointer user_data) {
	gboolean active = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button));
	GmOptions *options = gm_app_options(gm_app_instance());
	
	if (active) {
		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(
				gm_preferences_dialog_widget("check_button_needs_terminal")),
				TRUE);
	} else {
		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(
				gm_preferences_dialog_widget("check_button_needs_terminal")),
				gm_options_get_int(options, "editor_needs_terminal"));
	}

	gtk_widget_set_sensitive(gm_preferences_dialog_widget(
			"check_button_needs_terminal"), !active);
}

void
on_gm_preferences_dialog_check_button_alt_editor_clicked(
		GtkButton *button, gpointer user_data) {
	gboolean active = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button));

	if (!active) {
		gtk_entry_set_text(GTK_ENTRY(gm_preferences_dialog_widget(
				"entry_alt_editor")), "");
		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(
				gm_preferences_dialog_widget("check_button_embed_editor")), 
				FALSE);
		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(
				gm_preferences_dialog_widget("check_button_needs_terminal")), 
				FALSE);
	}

	gtk_widget_set_sensitive(gm_preferences_dialog_widget(
			"entry_alt_editor"), active);
	gtk_widget_set_sensitive(gm_preferences_dialog_widget(
			"check_button_embed_editor"), active);
	gtk_widget_set_sensitive(gm_preferences_dialog_widget(
			"check_button_needs_terminal"),	active);
}

void
on_gm_preferences_dialog_combo_box_scheme_changed(GtkComboBox *box,
		gpointer user_data) {
	GtkTreeIter iter;
	gchar *scheme;
	GtkTreeModel *model = gtk_combo_box_get_model(box);
	GmColorTable *color_table = gm_app_color_table(gm_app_instance());
	
	gtk_combo_box_get_active_iter(box, &iter);
	gtk_tree_model_get(model, &iter, SCHEME_OPTION, &scheme, -1);
	gm_color_table_set_from_scheme_name(color_table, scheme);
	
	g_free(scheme);
}