<?php // phpcs:ignoreFile
/**
 * Query logging helper for NL2SQL few-shot seeding.
 *
 * Usage:
 *   require_once __DIR__ . '/includes/log_query.php';
 *   logControlsQuery($userQuery, $sqlTemplate, $params, $sourceForm, $executionMs, $rowCount);
 */

// Logging database connection (separate from historian)
function getLoggingPdo(): ?PDO
{
    static $pdo = null;

    if ($pdo !== null) {
        return $pdo;
    }

    $servername = '192.168.0.16';
    $username   = 'lasucaai';
    $password   = 'is413#dfslw';
    $dbname     = 'lasucaai';

    try {
        $pdo = new PDO(
            "sqlsrv:Server=$servername;Database=$dbname",
            $username,
            $password,
            [
                PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
                PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            ]
        );
        return $pdo;
    } catch (PDOException $e) {
        error_log('getLoggingPdo connection error: ' . $e->getMessage());
        return null;
    }
}

/**
 * Log a query to dbo.controls_query_log for NL2SQL training.
 *
 * @param string      $userQuery    Natural-language description of the search.
 * @param string      $sqlTemplate  Parameterized SQL with placeholders.
 * @param array|null  $params       Associative array of parameter values.
 * @param string|null $sourceForm   Originating form identifier.
 * @param int|null    $executionMs  Query runtime in milliseconds.
 * @param int|null    $rowCount     Number of rows returned.
 * @return bool       True on success, false on failure.
 */
function logControlsQuery(
    string $userQuery,
    string $sqlTemplate,
    ?array $params = null,
    ?string $sourceForm = null,
    ?int $executionMs = null,
    ?int $rowCount = null
): bool {
    // Silently skip if inputs are empty
    if (trim($userQuery) === '' || trim($sqlTemplate) === '') {
        return false;
    }

    $pdo = getLoggingPdo();
    if ($pdo === null) {
        return false;
    }

    $sql = "
        INSERT INTO dbo.controls_query_log
            (user_query, sql_template, params, source_form, user_session, execution_ms, row_count)
        VALUES
            (:user_query, :sql_template, :params, :source_form, :user_session, :execution_ms, :row_count)
    ";

    try {
        $stmt = $pdo->prepare($sql);
        $result = $stmt->execute([
            ':user_query'   => mb_substr($userQuery, 0, 1000),
            ':sql_template' => $sqlTemplate,
            ':params'       => $params !== null ? json_encode($params, JSON_UNESCAPED_UNICODE) : null,
            ':source_form'  => $sourceForm,
            ':user_session' => session_id() ?: null,
            ':execution_ms' => $executionMs,
            ':row_count'    => $rowCount,
        ]);
        return $result;
    } catch (Throwable $e) {
        return false;
    }
}

/**
 * Build a natural-language description from form inputs.
 *
 * @param string      $searchType    'single_name' or 'multiple_names'.
 * @param string      $searchName    Single tag name (if applicable).
 * @param array       $selectedTags  Array of tag names for multi-tag search.
 * @param string      $startDate     Start datetime string.
 * @param string      $endDate       End datetime string.
 * @param int         $limit         Row limit.
 * @param int         $timeInterval  Sampling interval in seconds.
 * @return string     Human-readable query description.
 */
function buildUserQueryDescription(
    string $searchType,
    string $searchName,
    array $selectedTags,
    string $startDate,
    string $endDate,
    int $limit,
    int $timeInterval
): string {
    $parts = [];

    // Tag(s)
    if ($searchType === 'single_name' && $searchName !== '') {
        $parts[] = "Show data for tag \"{$searchName}\"";
    } elseif ($searchType === 'multiple_names' && !empty($selectedTags)) {
        $tagList = implode(', ', array_map(fn($t) => "\"{$t}\"", $selectedTags));
        $parts[] = "Compare tags {$tagList}";
    } else {
        return '';
    }

    // Date range
    if ($startDate !== '' && $endDate !== '') {
        $parts[] = "from {$startDate} to {$endDate}";
    } elseif ($startDate !== '') {
        $parts[] = "starting from {$startDate}";
    } elseif ($endDate !== '') {
        $parts[] = "up until {$endDate}";
    }

    // Sampling
    if ($timeInterval > 1) {
        if ($timeInterval >= 60) {
            $minutes = (int) ($timeInterval / 60);
            $parts[] = "sampled every {$minutes} minute" . ($minutes > 1 ? 's' : '');
        } else {
            $parts[] = "sampled every {$timeInterval} seconds";
        }
    }

    // Limit
    $parts[] = "limit {$limit} rows";

    return implode(' ', $parts);
}