<?php
header('Content-Type: application/json; charset=utf-8');

require_once(__DIR__ . '/include/headscript.php');

try {
    $db = DBHandlerSelect::getInstance();
    $pdo = $db->getConnection();

    $iduser = $iduserlogin ?? null;

    $rawInput = file_get_contents('php://input');
    $input = json_decode($rawInput, true);

    if (!is_array($input)) {
        throw new Exception('Payload JSON non valido.');
    }

    $id = (int)($input['id'] ?? 0);

    if ($id <= 0) {
        throw new Exception('ID non valido.');
    }

    $roiX = isset($input['roi_x']) ? (float)$input['roi_x'] : null;
    $roiY = isset($input['roi_y']) ? (float)$input['roi_y'] : null;
    $roiW = isset($input['roi_width']) ? (float)$input['roi_width'] : null;
    $roiH = isset($input['roi_height']) ? (float)$input['roi_height'] : null;
    $roiPage = isset($input['roi_page']) ? (int)$input['roi_page'] : 1;
    $mode = $input['calculation_mode'] ?? 'auto_roi';

    if ($roiX === null || $roiY === null || $roiW === null || $roiH === null) {
        throw new Exception('ROI non valida.');
    }

    if ($roiW <= 0 || $roiH <= 0) {
        throw new Exception('Dimensioni ROI non valide.');
    }

    if ($roiX < 0 || $roiY < 0 || $roiX > 1 || $roiY > 1 || $roiW > 1 || $roiH > 1) {
        throw new Exception('Coordinate ROI fuori scala.');
    }

    $allowedModes = [
        'auto_roi',
        'stitch_contour',
        'filled_union',
        'closed_path'
    ];

    if (!in_array($mode, $allowedModes, true)) {
        $mode = 'auto_roi';
    }

    if ($iduser === null || $iduser === '') {
        $stmt = $pdo->prepare("
            UPDATE cad_area_jobs
            SET
                roi_x = ?,
                roi_y = ?,
                roi_width = ?,
                roi_height = ?,
                roi_page = ?,
                calculation_mode = ?,
                status = 'uploaded',
                message = NULL
            WHERE id = ?
        ");

        $stmt->execute([
            $roiX,
            $roiY,
            $roiW,
            $roiH,
            $roiPage,
            $mode,
            $id
        ]);
    } else {
        $stmt = $pdo->prepare("
            UPDATE cad_area_jobs
            SET
                roi_x = ?,
                roi_y = ?,
                roi_width = ?,
                roi_height = ?,
                roi_page = ?,
                calculation_mode = ?,
                status = 'uploaded',
                message = NULL
            WHERE id = ?
            AND iduser = ?
        ");

        $stmt->execute([
            $roiX,
            $roiY,
            $roiW,
            $roiH,
            $roiPage,
            $mode,
            $id,
            $iduser
        ]);
    }

    if ($stmt->rowCount() === 0) {
        throw new Exception('Nessun record aggiornato. Controlla ID o utente.');
    }

    echo json_encode([
        'success' => true,
        'message' => 'ROI salvata correttamente.'
    ]);
    exit;
} catch (Throwable $e) {
    error_log('CAD area save ROI error: ' . $e->getMessage());

    echo json_encode([
        'success' => false,
        'message' => $e->getMessage()
    ]);
    exit;
}