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


/**
 * Handles power outage requests for the new schema.
 * @param resource $dbconn The database connection.
 * @param array $input_data The decoded JSON input data.
 */
function handle_new_power_request($dbconn, $input_data) {
    $poly = $input_data['poly'] ?? null;
    $start = $input_data['start'] ?? null;
    $end = $input_data['end'] ?? null;

    if (!$poly || !$start || !$end) {
        send_error(400, 'Missing required fields: poly, start, and end are required for power requests.');
    }

    $query = "
        SELECT 
            SUM(p.outagen) as total_outages,
            COUNT(p.id) as outage_events,
            SUM(p.peakoutage) as peak_outages
        FROM newpower p
        WHERE ST_Within(p.geom, ST_GeomFromText($1, 4326))
        AND p.start_time >= $2 
        AND p.start_time <= $3
    ";

    try {
        $result = pg_query_params($dbconn, $query, [$poly, $start, $end]);
        if ($result === false) {
            throw new Exception('Database query failed: ' . pg_last_error($dbconn));
        }
        $data = pg_fetch_assoc($result);
        pg_free_result($result);

        header('Content-Type: application/json');
        echo json_encode($data ?: new stdClass()); // Return empty JSON object if no results

    } catch (Exception $e) {
        send_error(500, 'An error occurred while processing the power request.', $e->getMessage());
    }
}


if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $input_data = null;
    $request_type = null;
    $contentType = trim(strtolower($_SERVER['HTTP_CONTENT_TYPE'] ?? $_SERVER['CONTENT_TYPE'] ?? ''));

    if (strpos($contentType, 'application/json') === 0) {
        $raw_post_data = file_get_contents('php://input');

        if ($raw_post_data === false || $raw_post_data === '') {
            send_error(400, 'Received empty request body or could not read input.', "Error: Could not read php://input or it was empty.");
        }

        $input_data = json_decode($raw_post_data, true);

        if (json_last_error() !== JSON_ERROR_NONE) {
            send_error(400, 'Invalid JSON payload received.', 'JSON Decode Error: ' . json_last_error_msg() . " | Raw data snippet: " . substr($raw_post_data, 0, 100));
        } elseif (!is_array($input_data)) {
            send_error(400, 'Invalid JSON payload: Expected a JSON object.', "JSON Decode Warning: Result is not an array. Data: " . print_r($input_data, true));
        } else {
            $request_type = $input_data['request_type'] ?? null;
        }
    } else {
        send_error(415, 'Unsupported Media Type. This endpoint requires application/json.', "Unsupported Media Type Received: " . $contentType);
    }

    if ($request_type === null) {
        if (is_array($input_data) && !isset($input_data['request_type'])) {
            send_error(400, 'Missing "request_type" field within the request payload.');
        } else {
            send_error(400, 'Missing required parameter: request_type (or processing error).');
        }
    }

    $dbconn = getDBConnection();
    
    switch ($request_type) {
        // Retaining legacy endpoints from stormdata.php but pointing to new handlers if needed
        // For now, only implementing the 'power' endpoint for the new schema
        case 'power':
            handle_new_power_request($dbconn, $input_data);
            break;
        // The 'powernopoly' case from the original file can be implemented here if needed.
        // It would be similar to handle_new_power_request but without the ST_Within clause.

        /*
        // Legacy endpoints can be added here if they need to be migrated.
        case 'ohgo':
            // handle_ohgo_request($dbconn, $input_data);
            send_error(501, 'The "ohgo" request type is not yet implemented for newstormdata.');
            break;
        case 'ohgonopoly':
            // handle_ohgo_request_no_poly($dbconn, $input_data);
            send_error(501, 'The "ohgonopoly" request type is not yet implemented for newstormdata.');
            break;
        case 'wupoly':
            // handle_wu_request_poly($dbconn, $input_data);
            send_error(501, 'The "wupoly" request type is not yet implemented for newstormdata.');
            break;
        case 'campoly':
            // handle_cam_request($dbconn, $input_data);
            send_error(501, 'The "campoly" request type is not yet implemented for newstormdata.');
            break;
        */
        default:
            send_error(400, 'Invalid request_type specified: ' . htmlspecialchars($request_type));
            break;
    }

    pg_close($dbconn);

} else {
    http_response_code(405);
    header('Allow: POST');
    header('Content-Type: application/json; charset=utf-8');
    echo json_encode(['error' => 'Invalid request method. Only POST is allowed.']);
    exit;
}
?>