/*
 * page-search.c -- page /search
 *
 * Copyright (c) 2020-2023 David Demelier <markand@malikania.fr>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <assert.h>
#include <string.h>

#include "database.h"
#include "page-index.h"
#include "page-search.h"
#include "page-status.h"
#include "page.h"
#include "paste.h"
#include "util.h"

#include "html/search.h"

#define TITLE    "paster -- search"
#define LIMIT    16

enum {
	KEYWORD_LANGUAGES
};

struct page {
	struct kreq *req;
	struct ktemplate template;
};

static const char * const keywords[] = {
	[KEYWORD_LANGUAGES] = "languages"
};

static int
format(size_t keyword, void *data)
{
	struct page *page = data;
	struct khtmlreq html;

	khtml_open(&html, page->req, 0);

	switch (keyword) {
	case KEYWORD_LANGUAGES:
		for (size_t i = 0; i < languagesz; ++i) {
			khtml_attr(&html, KELEM_OPTION, KATTR_NAME, languages[i], KATTR__MAX);
			khtml_puts(&html, languages[i]);
			khtml_closeelem(&html, 1);
		}
		break;
	default:
		break;
	}

	khtml_close(&html);

	return 1;
}

static void
get(struct kreq *req)
{
	struct page self = {
		.req = req,
		.template = {
			.cb = format,
			.arg = &self,
			.key = keywords,
			.keysz = NELEM(keywords)
		}
	};

	page(req, KHTTP_200, TITLE, html_search, &self.template);
}

static void
post(struct kreq *req)
{
	struct paste pastes[LIMIT];
	size_t pastesz = NELEM(pastes);
	const char *key, *val, *title = NULL, *author = NULL, *language = NULL;

	for (size_t i = 0; i < req->fieldsz; ++i) {
		key = req->fields[i].key;
		val = req->fields[i].val;

		if (strcmp(key, "title") == 0)
			title = val;
		else if (strcmp(key, "author") == 0)
			author = val;
		else if (strcmp(key, "language") == 0)
			language = val;
	}

	/* Sets to null if they are empty. */
	if (title && strlen(title) == 0)
		title = NULL;
	if (author && strlen(author) == 0)
		author = NULL;

	if (database_search(pastes, &pastesz, title, author, language) < 0)
		page_status(req, KHTTP_500);
	else {
		page_index_render(req, pastes, pastesz);

		for (size_t i = 0; i < pastesz; ++i)
			paste_finish(&pastes[i]);
	}
}

void
page_search(struct kreq *req)
{
	assert(req);

	switch (req->method) {
	case KMETHOD_GET:
		get(req);
		break;
	case KMETHOD_POST:
		post(req);
		break;
	default:
		page_status(req, KHTTP_400);
		break;
	}
}