<?php
require_once __DIR__ . '/config.php';

$hash = $_GET['hash'] ?? '';
if (!$hash) error_response('Missing hash parameter');

$errors = load_json(ERRORS_FILE);
$sessions = load_json(SESSIONS_FILE);

$matches = array_filter($errors, fn($e) => ($e['hash'] ?? '') === $hash);
$matches = array_values($matches);

if (empty($matches)) {
    error_response('Error not found', 404);
}

$totalCount = array_sum(array_column($matches, 'count'));
$uniqueSessions = array_unique(array_column($matches, 'session_id'));
$firstSeen = min(array_column($matches, 'first_seen'));
$lastSeen = max(array_column($matches, 'last_seen'));

json_response([
    'success' => true,
    'hash' => $hash,
    'total_occurrences' => count($matches),
    'total_count' => $totalCount,
    'unique_sessions' => count($uniqueSessions),
    'first_seen' => $firstSeen,
    'last_seen' => $lastSeen,
    'type' => $matches[0]['type'] ?? 'unknown',
    'severity' => $matches[0]['severity'] ?? 'error',
    'category' => $matches[0]['category'] ?? 'runtime',
    'sample_message' => $matches[0]['message'] ?? '',
    'sample_stack' => $matches[0]['stack'] ?? null,
    'occurrences' => array_slice($matches, 0, 20),
]);