/* 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 *SearchQuery = SQL(
	SELECT
		events.event,
		events.time,
		contexts.network,
		contexts.name,
		events.type,
		names.nick,
		names.user,
		names.host,
		events.target,
		highlight(search, 6, :highlight, :highlight)
	FROM events
	JOIN contexts USING (context)
	JOIN names USING (name)
	JOIN search ON search.rowid = events.event
	WHERE coalesce(contexts.network = :network, true)
		AND coalesce(contexts.name = :context, true)
		AND coalesce(contexts.query = :query, true)
		AND search MATCH :search
	LIMIT :limit
	OFFSET :offset;
);

enum kcgi_err pageSearch(struct kreq *req) {
	if (!req->fieldmap[Query]) {
		return httpFail(req, KHTTP_400);
	}
	if (req->fieldmap[Context] && !req->fieldmap[Network]) {
		return httpFail(req, KHTTP_400);
	}
	const char *query = req->fieldmap[Query]->parsed.s;

	int64_t offset = 0;
	const char *network = NULL;
	const char *context = NULL;
	if (req->fieldmap[Offset]) offset = req->fieldmap[Offset]->parsed.i;
	if (req->fieldmap[Network]) network = req->fieldmap[Network]->parsed.s;
	if (req->fieldmap[Context]) context = req->fieldmap[Context]->parsed.s;

	enum kcgi_err error = httpHead(req, KHTTP_200, KMIME_TEXT_HTML);
	if (req->method == KMETHOD_HEAD) return error;

	struct khtmlreq html;
	error = error
		|| khttp_body(req)
		|| khtml_open(&html, req, KHTML_PRETTY)
		|| htmlHead(&html, query)
		|| htmlNav(&html, network, context)
		|| khtml_elem(&html, KELEM_TABLE);
	if (error) return error;

	dbBindText(stmt.search, ":highlight", "\26");
	dbBindText(stmt.search, ":network", network);
	dbBindText(stmt.search, ":context", context);
	if (pagePublic) dbBindInt(stmt.search, ":query", false);
	dbBindText(stmt.search, ":search", query);
	dbBindInt(stmt.search, ":limit", pageLimit);
	dbBindInt(stmt.search, ":offset", offset);

	int result;
	while (SQLITE_ROW == (result = sqlite3_step(stmt.search))) {
		struct Event event = {
			.event = sqlite3_column_int64(stmt.search, 0),
			.time = sqlite3_column_int64(stmt.search, 1),
			.network = (const char *)sqlite3_column_text(stmt.search, 2),
			.context = (const char *)sqlite3_column_text(stmt.search, 3),
			.type = sqlite3_column_int(stmt.search, 4),
			.nick = (const char *)sqlite3_column_text(stmt.search, 5),
			.user = (const char *)sqlite3_column_text(stmt.search, 6),
			.host = (const char *)sqlite3_column_text(stmt.search, 7),
			.target = (const char *)sqlite3_column_text(stmt.search, 8),
			.message = (const char *)sqlite3_column_text(stmt.search, 9),
		};
		error = htmlEvent(&html, event);
		if (error) break;
	}
	if (result != SQLITE_DONE) errx(EX_SOFTWARE, "%s", sqlite3_errmsg(db));
	sqlite3_reset(stmt.search);

	return error
		|| htmlFooter(&html)
		|| khtml_close(&html);
}