/* Copyright (C) 2020  C. McEnroe <june@causal.agency>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>

#include "server.h"

const char *htmlStylesheet;

static enum kcgi_err stylesheet(struct khtmlreq *html) {
	if (!htmlStylesheet) return KCGI_OK;
	return khtml_attr(
		html, KELEM_LINK,
		KATTR_REL, "stylesheet",
		KATTR_HREF, htmlStylesheet,
		KATTR__MAX
	);
}

enum kcgi_err htmlHead(struct khtmlreq *html, const char *title) {
	return khtml_elem(html, KELEM_DOCTYPE)
		|| khtml_attr(html, KELEM_META, KATTR_CHARSET, "utf-8", KATTR__MAX)
		|| khtml_elem(html, KELEM_TITLE)
		|| khtml_puts(html, title)
		|| khtml_closeelem(html, 1)
		|| stylesheet(html)
		|| khtml_elem(html, KELEM_H1)
		|| khtml_puts(html, title)
		|| khtml_closeelem(html, 1);
}

enum kcgi_err
htmlNav(struct khtmlreq *html, const char *network, const char *context) {
	enum kcgi_err error = 0
		|| khtml_elem(html, KELEM_NAV)
		|| khtml_elem(html, KELEM_OL)
		|| khtml_elem(html, KELEM_LI)
		|| khtml_attr(html, KELEM_A, KATTR_HREF, Pages[Networks], KATTR__MAX)
		|| khtml_puts(html, "Networks")
		|| khtml_closeelem(html, 2);
	if (error) return error;

	if (network) {
		char *href = khttp_urlpart(
			NULL, NULL, Pages[Contexts],
			Keys[Network].name, network,
			NULL
		);
		if (!href) err(EX_OSERR, "khttp_urlpart");
		error = 0
			|| khtml_elem(html, KELEM_LI)
			|| khtml_attr(html, KELEM_A, KATTR_HREF, href, KATTR__MAX)
			|| khtml_puts(html, network)
			|| khtml_closeelem(html, 2);
		if (error) return error;
	}

	if (network && context) {
		char *href = khttp_urlpart(
			NULL, NULL, Pages[Events],
			Keys[Network].name, network,
			Keys[Context].name, context,
			NULL
		);
		if (!href) err(EX_OSERR, "khttp_urlpart");
		error = 0
			|| khtml_elem(html, KELEM_LI)
			|| khtml_attr(html, KELEM_A, KATTR_HREF, href, KATTR__MAX)
			|| khtml_puts(html, context)
			|| khtml_closeelem(html, 2);
		if (error) return error;
	}

	return khtml_closeelem(html, 2);
}

enum kcgi_err
htmlSearch(struct khtmlreq *html, const char *network, const char *context) {
	char label[256];
	snprintf(
		label, sizeof(label), "Search%s%s",
		(network ? " " : ""), (context ? context : network ? network : "")
	);

	enum kcgi_err error = 0
		|| khtml_attr(
			html, KELEM_FORM,
			KATTR_METHOD, "get",
			KATTR_ACTION, Pages[Search],
			KATTR__MAX
		)
		|| khtml_attr(
			html, KELEM_INPUT,
			KATTR_TYPE, "search",
			KATTR_NAME, Keys[Query].name,
			KATTR__MAX
		)
		|| khtml_attr(
			html, KELEM_INPUT,
			KATTR_TYPE, "submit",
			KATTR_VALUE, label,
			KATTR__MAX
		);
	if (error) return error;

	if (network) {
		error = khtml_attr(
			html, KELEM_INPUT,
			KATTR_TYPE, "hidden",
			KATTR_NAME, Keys[Network].name,
			KATTR_VALUE, network,
			KATTR__MAX
		);
		if (error) return error;
	}

	if (context) {
		error = khtml_attr(
			html, KELEM_INPUT,
			KATTR_TYPE, "hidden",
			KATTR_NAME, Keys[Context].name,
			KATTR_VALUE, context,
			KATTR__MAX
		);
		if (error) return error;
	}

	return khtml_closeelem(html, 1);
}