/* pal
 *
 * Copyright (C) 2004, Scott Kuhl
 *
 * 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
 *
 */


#include <time.h>

#include "main.h"
#include "event.h"
#include "html.h"


/* prints out the string but properly escapes things for HTML */
void pal_html_escape_print(gchar* s)
{
    while(*s != '\0')
    {
	if(*s == '<')        /* < to &lt; */
	    g_print("&lt;");
	else if(*s == '>')   /* > to &gt; */
	    g_print("&gt;");
	else if(*s == '&')   /* & to *amp; */
	    g_print("&amp;");
	else
	    g_print("%c", *s);

	s++;
    }
}



/* finishes with date on the first day of the next month */
void pal_html_month(GDate* date, gboolean force_month_label,
			  const GDate* today)
{
    gint orig_month = g_date_get_month(date);
    int i;
    gchar buf[1024];
    gchar start[64] = "<td class='pal-dayname' align='center'>";
    gchar end[64] = "</td>";


    g_print("%s", "<table class='pal-cal' cellspacing='0' cellpadding='1'>\n");

    g_date_strftime(buf, 1024, "%B %Y", date);
    g_print("<tr><td class='pal-month' align='center' colspan='7'>%s</td></tr>\n", buf);

    if(!settings->week_start_monday)
	g_print("%s%s%s\n", start, _("Sunday"), end);

    g_print("%s%s%s\n", start, _("Monday"), end);
    g_print("%s%s%s\n", start, _("Tuesday"), end);
    g_print("%s%s%s\n", start, _("Wednesday"), end);
    g_print("%s%s%s\n", start, _("Thursday"), end);
    g_print("%s%s%s\n", start, _("Friday"), end);
    g_print("%s%s%s\n", start, _("Saturday"), end);

    if(settings->week_start_monday)
	g_print("%s%s%s\n", start, _("Sunday"), end);

    g_print("</tr>\n");



    /* start the month on the right weekday */
    if(settings->week_start_monday)
	for(i=0; i<g_date_get_weekday(date)-1; i++)
	    g_print("<td class='pal-blank'>&nbsp;</td>");
    else
    {
	if(g_date_get_weekday(date) != 7)
	    for(i=0; i<g_date_get_weekday(date); i++)
		g_print("<td class='pal-blank'>&nbsp;</td>");
    }


    while(g_date_get_month(date) == orig_month)
    {

	GList* events = get_events(date);
	gint num_events = g_list_length(events);
	gint num_events_printed = 0;
	GList* item;

	/* make today bright */
	if(g_date_compare(date,today) == 0)
	    g_print("<td class='pal-today' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
	else
	{
	    switch(g_date_get_weekday(date))
	    {
		case 1:
		    g_print("<td class='pal-mon' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
		    break;
		case 2:
		    g_print("<td class='pal-tue' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
		    break;
		case 3:
		    g_print("<td class='pal-wed' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
		    break;
		case 4:
		    g_print("<td class='pal-thu' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
		    break;
		case 5:
		    g_print("<td class='pal-fri' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
		    break;
		case 6:
		    g_print("<td class='pal-sat' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
		    break;
		case 7:
		    g_print("<td class='pal-sun' valign='top'><b>%02d</b><br />\n", g_date_get_day(date));
		    break;
		default: /* shouldn't happen */
		    break;

	    }
	}

	item = g_list_first(events);

	/* while there are more events to be displayed */
	while(num_events > num_events_printed)
	{
	    gchar* event_text = pal_event_escape((PalEvent*) (item->data), date);
	    g_print("<b>*</b> ");
	    pal_html_escape_print(event_text);
	    g_print("<br />\n");
	    num_events_printed++;
	    item = g_list_next(item);
	    g_free(event_text);
	}

	g_print("</td>\n");

	if((settings->week_start_monday && g_date_get_weekday(date) == 7) ||
	   (!settings->week_start_monday && g_date_get_weekday(date) == 6))
	    g_print("</tr>\n");

	g_date_add_days(date,1);
	g_list_free(events);
    }

    /* skip to end of calendar */
    if(settings->week_start_monday)
    {
	int tmp = g_date_get_weekday(date);
	if(tmp == 1) tmp = 7;
	while(tmp != 7)
	{
	    g_print("<td class='pal-blank'>&nbsp;</td>");
	    tmp++;
	}
    }
    else
    {
	int tmp = g_date_get_weekday(date);
	if(tmp == 7) tmp = 6;
	while(tmp != 6)
	{
	    g_print("<td class='pal-blank'>&nbsp;</td>");
	    tmp++;
	}
    }

    g_print("</tr></table>\n");

}




void pal_html_out()
{
    gint on_month = 0;
    GDate* today = g_date_new();
    GDate* date = g_date_new();

    g_date_set_time(today, time(NULL));
    g_date_set_time(date, time(NULL));

    /* back up to the first of the month */
    g_date_subtract_days(date, g_date_get_day(date) - 1);

    g_print("%s%s%s", "<!-- Generated with pal ", VERSION, " -->\n");

    for(on_month=0; on_month < settings->cal_lines; on_month++)
	pal_html_month(date, TRUE, today);

    g_print("<p align='right'><font size='-1'><i>Calendar created with <a href='http://palcal.sourceforge.net/'>pal</a>.</i></font></p>\n");

}