<?php
	session_start();
	include_once($_SERVER['DOCUMENT_ROOT'].'/vx/lib/ua.php');
	include_once($_SERVER['DOCUMENT_ROOT'].'/vx/lib/func.php');
	include_once($_SERVER['DOCUMENT_ROOT'].'/vx_/site_info.php');
	include_once($_SERVER['DOCUMENT_ROOT'].'/vx/lib/mysql.php');
	include_once($_SERVER['DOCUMENT_ROOT'].'/vx/lib/States.php');
	
	$pg = new PDO("pgsql:host=americasgotgrants.com;port=5432;dbname=grantsdb", "jeremy", 'Jbera092405!', [
		PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
	]);
	
	$openaiApiKey = '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';

	function prepareTextForEmbedding(string $text): string {
		$text = strip_tags($text);
		$text = html_entity_decode($text);
		$text = strtolower($text);
		$text = preg_replace('/\s+/', ' ', $text);
		$text = trim($text);
		$text = mb_substr($text, 0, 20000); // truncate to ~8192 tokens
		return trim($text);
	}

	function getEmbedding(string $text, string $apiKey): array {
		$payload = json_encode([
			"model" => "text-embedding-3-large",
			"input" => $text,
			"dimensions" => 1536   // Make sure it matches your column
		]);

		$ch = curl_init("https://api.openai.com/v1/embeddings");
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_HTTPHEADER, [
			"Content-Type: application/json",
			"Authorization: Bearer $apiKey"
		]);
		curl_setopt($ch, CURLOPT_POST, true);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);

		$response = curl_exec($ch);
		if(curl_errno($ch)) {
			throw new Exception("cURL error: " . curl_error($ch));
		}
		curl_close($ch);
		
		$result = json_decode($response, true);
		
		// Check for API errors
		if (!is_array($result) || isset($result['error'])) {
			$errorMessage = $result['error']['message'] ?? 'Unknown API error';
			throw new Exception("OpenAI API error: $errorMessage");
		}

		if (!isset($result['data']) || !is_array($result['data'])) {
			throw new Exception("Unexpected OpenAI API response: " . $response);
		}

		return $result['data'][0]['embedding'];
	}
	
	function findMatchingGrants(string $clientInput, int $page, int $per_page, $start_date, $end_date): array {
		global $pg, $openaiApiKey;

		$text = prepareTextForEmbedding($clientInput);
		$embedding = getEmbedding($text, $openaiApiKey);

		// Convert to Postgres vector literal
		$vectorLiteral = '[' . implode(',', $embedding) . ']';
		
		$real_start_date = $start_date.' 00:00:00';
		$real_end_date = $end_date.' 23:59:59';
		// Query Postgres using cosine similarity
		$stmt = $pg->prepare("
			SELECT grants_id,
				   embeddings <#> :embedding AS distance
			FROM grants
			WHERE date_added >= :start_date
			AND date_added <= :end_date
			AND (deadline = NULL OR deadline >= :today)
			ORDER BY embeddings <#> :embedding
			LIMIT :top
			OFFSET :offset
		");
		
		$offset = ($page==1) ? 0 : ($page - 1)*$per_page;
		try {
			$stmt->bindValue(':embedding', $vectorLiteral);
			$stmt->bindValue(':top', $per_page, PDO::PARAM_INT);
			$stmt->bindValue(':offset', $offset, PDO::PARAM_INT);
			$stmt->bindValue(':start_date', $real_start_date);
			$stmt->bindValue(':end_date', $real_end_date);
			$stmt->bindValue(':today', date('Y-m-d').' 00:00:00');
			$stmt->execute();
		} catch(Exception $e) {
			echo '<pre>'.print_r($e,true).'</pre>';
		}

		return $stmt->fetchAll(PDO::FETCH_ASSOC);
	}
	
	ob_start();
?>
<div class="rb p20 top">
	<h2><span class="fas fa-magnifying-glass" style="color:#7a7a7a;"></span> Search</h2>
    <hr />
	<?php
	
		$not_ignored_where = " AND gg.grants_id NOT IN (SELECT grants_id FROM grdb.grd_usa_ignored_grants WHERE site_code='".$db->clean($siteCode)."' AND client_id='".$db->clean($_SESSION['user'])."')";
		if(!empty($_GET['ignored'])) {
			$not_ignored_where = " AND gg.grants_id IN (SELECT grants_id FROM grdb.grd_usa_ignored_grants WHERE site_code='".$db->clean($siteCode)."' AND client_id='".$db->clean($_SESSION['user'])."')";
		}
		$start_time = (date('Y')*1 - 1).'-01-01';
		$end_time = date('Y-m-d',strtotime('-30 day'));
		$gets_new_stuff = " AND gg.ts < '".date('Y-m-d',strtotime('-30 day'))." 00:00:00'";
		if(!empty($_SESSION['subscriptions']['2'])) {
			$gets_new_stuff = "";
			$end_time = date('Y-m-d');
		}
	
		$page = 1;
		$per_page = 20;
		if(!empty($_REQUEST['page'])) {
			$page = $_REQUEST['page'];
		}
		
		$where = '';
		$keyword = '';
		$total_count = 0;
		if(!empty($_REQUEST['search'])) {
			$keyword = trim($_REQUEST['search']);
		}
		$results = array();
		if(!empty($keyword)) {
			$results = findMatchingGrants($keyword, $page, $per_page, $start_time, $end_time);
			$res = $db->get_results("SELECT COUNT(*) as c
									FROM grdb.grd_grants AS gg
									WHERE (gg.deadline='0000-00-00' OR gg.deadline >= CURDATE())
									{$gets_new_stuff}
									{$where}");
			$total_count = $res[0]->c;
		}
		
		if(!empty($_REQUEST['page'])) {
			track_member_action('Changed Page',$_REQUEST['page']);
		} elseif(!empty($keyword)) {
			track_member_action('Searched',$keyword);
		} else {
			track_member_action('Page Visit','Search Database');
		}
		
		
		$max_page = ceil($total_count/$per_page);
		if($page<1) {
			$page = 1;
		}
		if($page>$max_page) {
			$page = $max_page;
		}
		$limit = '';
		if($total_count >= $per_page) {
			$limit = "LIMIT ".(($page-1)*$per_page).", ".$per_page;
		}
		
		$grant_list = array();
		if(!empty($results)) {
			foreach($results as $grant) {
				$res = $db->get_results("SELECT 
											gg.*,
											gusg.id AS favorite,
											gga.did_apply,
											gga.how_much_applied_for,
											gt.name AS grant_type,
											IF(gg.deadline='0000-00-00',1,0) as no_deadline,
											ggl.bg_color_hex,
											ggl.logo_url
									FROM grdb.grant_categories_new_grants gbg
									LEFT JOIN grdb.grd_grants AS gg ON gbg.grants_id=gg.grants_id
									LEFT JOIN grdb.grd_usa_saved_grants AS gusg
										ON gg.grants_id = gusg.grants_id
										AND gusg.client_id = '$user'
										AND gusg.site_code = '$siteCode'
									LEFT JOIN grdb.grd_grants_applied AS gga
										ON 
											gga.grants_id = gg.grants_id
										AND 
											gga.user = gusg.client_id
										AND 
											gga.site_code = gusg.site_code
									LEFT JOIN grdb.grd_types AS gt 
										ON gt.types_id = gg.types_id
									LEFT JOIN grdb.grd_site_logos ggl ON ggl.site_domain=gg.base_url AND ggl.status='active'
									WHERE
										gg.grants_id='".$db->clean($grant['grants_id'])."'
									GROUP BY gg.grants_id
									LIMIT 1");
				if(!empty($res)) {
					$grant_list[] = $res[0];
				}
			}
		}
	if(!empty($limit)) {
	?>
	<div id="paging">
		<center>
			<h3><?= paging_title($page,$total_count,$per_page);?> of <?= $total_count;?></h3>
			<button onclick="grant_list_change_page('1'); return false;" title="<?= paging_title(1,$total_count,$per_page);?>">&lt;&lt;</button>
			<button onclick="grant_list_change_page('<?= $page-1;?>'); return false;" title="<?= paging_title($page-1,$total_count,$per_page);?>">&lt;</button>
			<?php for($i=$page-5;$i<$page+5;$i++) {
				if($i>=1 && $i<=$max_page) { ?>
			<button onclick="grant_list_change_page('<?= $i;?>'); return false;" <?= ($i==$page) ? 'class="selected_page"' : '';?> title="<?= paging_title($i,$total_count,$per_page);?>"><?= $i;?></button>
				<?php } ?>
			<?php } ?>
			<button onclick="grant_list_change_page('<?= $page+1;?>'); return false;" title="<?= paging_title($page+1,$total_count,$per_page);?>">&gt;</button>
			<button onclick="grant_list_change_page('<?= $max_page;?>'); return false;" title="<?= paging_title($max_page,$total_count,$per_page);?>">&gt;&gt;</button>
		</center>
	</div>
	<?php } ?>
	<div id="search_form" style="margin:10px 0px;">
		<center>
			<form method="GET" action="">
				<?php /*
				<input type="hidden" name="page" value="<?= $page;?>" />
				*/ ?>
				<input type="hidden" name="page" value="1" />
				<div class="rib">
					<input type="text" id="searchKeyword" name="search" class="searchKeyword fleft" placeholder="Search Term" value="<?= $_GET['search'];?>" style="border-color:rgba(0,0,0,0.2);" />
					<button type="submit" name="submit" value="submit" class="fleft white-bg bborder tborder rborder searchButton" style="margin:0px 0px 0px -1px;"><i class="glyphicons glyphicons-search f18"></i></button>
				</div>
			</form>
		</center>
	</div>
	<div id="grantList">
		<?php if($phone) {
			include($_SERVER['DOCUMENT_ROOT'].'/vx/usa/layout/inc/non_angular_grant_list_mobile.php');
		} else {
			include($_SERVER['DOCUMENT_ROOT'].'/vx/usa/layout/inc/non_angular_grant_list.php');
		} ?>
	</div>
</div>
<?php
	$body = ob_get_clean();
	$title = "Advanced Searching : ".$_SESSION['site_name'];
	include($_SERVER['DOCUMENT_ROOT'].'/vx/usa/layout/non_angular_layout.php');
?>