#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "divelist.h"
#include "dive.h"
#include "display.h"

static void selection_cb(GtkTreeSelection *selection, GtkTreeModel *model)
{
	GtkTreeIter iter;
	GValue value = {0, };

	if (!gtk_tree_selection_get_selected(selection, NULL, &iter))
		return;

	gtk_tree_model_get_value(model, &iter, 6, &value);
	selected_dive = g_value_get_int(&value);
	repaint_dive();
}

static void fill_dive_list(struct DiveList *dive_list)
{
	int i;
	GtkTreeIter iter;
	const char *unit;
	GtkListStore *store;

	store = GTK_LIST_STORE(dive_list->model);
	switch (output_units.length) {
	case METERS:
		unit = "m";
		break;
	case FEET:
		unit = "ft";
		break;
	}
	gtk_tree_view_column_set_title(dive_list->depth, unit);

	for (i = 0; i < dive_table.nr; i++) {
		struct dive *dive = dive_table.dives[i];

		int len;
		char buffer[256], *datestr, *depth, *duration;
		struct tm *tm;
		int integer, frac;
		
		tm = gmtime(&dive->when);
		len = snprintf(buffer, sizeof(buffer),
			"%02d.%02d.%02d %02d:%02d",
			tm->tm_mday, tm->tm_mon+1, tm->tm_year % 100,
			tm->tm_hour, tm->tm_min);
		datestr = malloc(len+1);
		memcpy(datestr, buffer, len+1);

		switch (output_units.length) {
		unsigned int depth;
		case METERS:
			depth = (dive->maxdepth.mm + 49) / 100;
			integer = depth / 10;
			frac = depth % 10;
			if (integer < 20)
				break;
			frac = -1;
			/* Rounding? */
			break;
		case FEET:
			integer = to_feet(dive->maxdepth);
			frac = -1;
		}
		len = snprintf(buffer, sizeof(buffer),
		               "%d", integer);
		if (frac >= 0)
			len += snprintf(buffer+len, sizeof(buffer)-len,
				".%d", frac);
		depth = malloc(len + 1);
		memcpy(depth, buffer, len+1);
		
		len = snprintf(buffer, sizeof(buffer),
		               "%d", dive->duration.seconds / 60);
		duration = malloc(len + 1);
		memcpy(duration, buffer, len+1);

		gtk_list_store_append(store, &iter);
		gtk_list_store_set(store, &iter,
			0, datestr,
			1, dive->when,
			2, depth,
			3, dive->maxdepth,
			4, duration,
			5, dive->duration.seconds,
			6, i,
			-1);
	}
}

void dive_list_update_dives(struct DiveList dive_list)
{
	gtk_list_store_clear(GTK_LIST_STORE(dive_list.model));
	fill_dive_list(&dive_list);
	repaint_dive();
}

struct DiveList dive_list_create(void)
{
	struct DiveList    dive_list;
	GtkTreeSelection  *selection;
	GtkCellRenderer   *renderer;
	GtkTreeViewColumn *col;

	dive_list.model = gtk_list_store_new(7,
				   G_TYPE_STRING, G_TYPE_INT,
	                           G_TYPE_STRING, G_TYPE_INT, 
	                           G_TYPE_STRING, G_TYPE_INT,
	                           G_TYPE_INT);
	dive_list.tree_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(dive_list.model));
	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(dive_list.tree_view));

	gtk_tree_selection_set_mode(GTK_TREE_SELECTION(selection), GTK_SELECTION_BROWSE);
	gtk_widget_set_size_request(dive_list.tree_view, 200, 100);

	renderer = gtk_cell_renderer_text_new();
	dive_list.date = col = gtk_tree_view_column_new();
	gtk_tree_view_column_set_title(col, "Date");
	gtk_tree_view_column_set_sort_column_id(col, 1);
	gtk_tree_view_column_set_resizable (col, TRUE);
	gtk_tree_view_column_pack_start(col, renderer, TRUE);
	gtk_tree_view_column_add_attribute(col, renderer, "text", 0);
	gtk_tree_view_append_column(GTK_TREE_VIEW(dive_list.tree_view), col);
	
	renderer = gtk_cell_renderer_text_new();
	dive_list.depth = col = gtk_tree_view_column_new();
	gtk_tree_view_column_set_title(col, "ft");
	gtk_tree_view_column_set_sort_column_id(col, 3);
	gtk_tree_view_column_pack_start(col, renderer, FALSE);
	gtk_tree_view_column_add_attribute(col, renderer, "text", 2);
	gtk_tree_view_append_column(GTK_TREE_VIEW(dive_list.tree_view), col);
	gtk_object_set(GTK_OBJECT(renderer), "alignment", PANGO_ALIGN_RIGHT, NULL);
	gtk_cell_renderer_set_alignment(GTK_CELL_RENDERER(renderer), 1.0, 0.5);
	
	renderer = gtk_cell_renderer_text_new();
	dive_list.duration = col = gtk_tree_view_column_new();
	gtk_tree_view_column_set_title(col, "min");
	gtk_tree_view_column_set_sort_column_id(col, 5);
	gtk_tree_view_column_pack_start(col, renderer, FALSE);
	gtk_tree_view_column_add_attribute(col, renderer, "text", 4);
	gtk_tree_view_append_column(GTK_TREE_VIEW(dive_list.tree_view), col);
	gtk_object_set(GTK_OBJECT(renderer), "alignment", PANGO_ALIGN_RIGHT, NULL);
	gtk_cell_renderer_set_alignment(GTK_CELL_RENDERER(renderer), 1.0, 0.5);

	fill_dive_list(&dive_list);

	g_object_set(G_OBJECT(dive_list.tree_view), "headers-visible", TRUE,
					  "search-column", 0,
					  "rules-hint", TRUE,
					  NULL);

	g_signal_connect(selection, "changed", G_CALLBACK(selection_cb), dive_list.model);

	dive_list.container_widget = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(dive_list.container_widget),
		               GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
	gtk_container_add(GTK_CONTAINER(dive_list.container_widget), dive_list.tree_view);

	return dive_list;
}