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

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

function jsonResponse(array $data): void
{
    echo json_encode($data);
    exit;
}

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)) {
        jsonResponse([
            'success' => false,
            'message' => 'Payload JSON non valido.'
        ]);
    }

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

    if ($id <= 0) {
        jsonResponse([
            'success' => false,
            'message' => 'ID non valido.'
        ]);
    }

    $areaMm2 = isset($input['area_mm2']) ? (float)$input['area_mm2'] : 0;
    $areaCm2 = isset($input['area_cm2']) ? (float)$input['area_cm2'] : 0;

    $outerAreaMm2 = isset($input['manual_outer_area_mm2']) ? (float)$input['manual_outer_area_mm2'] : $areaMm2;
    $holesAreaMm2 = isset($input['manual_holes_area_mm2']) ? (float)$input['manual_holes_area_mm2'] : 0;

    $widthMm = isset($input['width_mm']) ? (float)$input['width_mm'] : null;
    $heightMm = isset($input['height_mm']) ? (float)$input['height_mm'] : null;

    $calibrationPx = isset($input['manual_calibration_px']) ? (float)$input['manual_calibration_px'] : 0;
    $calibrationMm = isset($input['manual_calibration_mm']) ? (float)$input['manual_calibration_mm'] : 0;
    $mmPerPx = isset($input['manual_mm_per_px']) ? (float)$input['manual_mm_per_px'] : 0;

    $outerPolygon = $input['manual_polygon'] ?? null;
    $holes = $input['manual_holes'] ?? [];
    $roi = $input['roi'] ?? null;

    if ($areaMm2 <= 0) {
        jsonResponse([
            'success' => false,
            'message' => 'Area finale non valida.'
        ]);
    }

    if ($outerAreaMm2 <= 0) {
        jsonResponse([
            'success' => false,
            'message' => 'Area esterna non valida.'
        ]);
    }

    if ($holesAreaMm2 < 0) {
        jsonResponse([
            'success' => false,
            'message' => 'Area fori non valida.'
        ]);
    }

    if ($calibrationPx <= 0 || $calibrationMm <= 0 || $mmPerPx <= 0) {
        jsonResponse([
            'success' => false,
            'message' => 'Calibrazione non valida.'
        ]);
    }

    if (!is_array($outerPolygon) || count($outerPolygon) < 3) {
        jsonResponse([
            'success' => false,
            'message' => 'Poligono esterno non valido. Servono almeno 3 punti.'
        ]);
    }

    if (!is_array($holes)) {
        $holes = [];
    }

    $manualPolygonJson = json_encode([
        'outer_polygon' => $outerPolygon,
        'holes' => $holes,
        'roi' => $roi,
        'calibration' => $input['calibration'] ?? null,
        'canvas' => $input['canvas'] ?? null,
        'areas' => [
            'outer_area_mm2' => $outerAreaMm2,
            'holes_area_mm2' => $holesAreaMm2,
            'final_area_mm2' => $areaMm2,
            'final_area_cm2' => $areaCm2
        ]
    ]);

    $manualHolesJson = json_encode($holes);

    $roiX = null;
    $roiY = null;
    $roiW = null;
    $roiH = null;

    if (is_array($roi)) {
        $roiX = isset($roi['x']) ? (float)$roi['x'] : null;
        $roiY = isset($roi['y']) ? (float)$roi['y'] : null;
        $roiW = isset($roi['width']) ? (float)$roi['width'] : null;
        $roiH = isset($roi['height']) ? (float)$roi['height'] : null;
    }

    if ($iduser === null || $iduser === '') {
        $stmt = $pdo->prepare("
            UPDATE cad_area_jobs
            SET
                roi_x = COALESCE(?, roi_x),
                roi_y = COALESCE(?, roi_y),
                roi_width = COALESCE(?, roi_width),
                roi_height = COALESCE(?, roi_height),
                roi_page = 1,

                status = 'completed',
                message = 'Area calcolata tramite tracciamento manuale calibrato.',

                area_mm2 = ?,
                area_cm2 = ?,
                area_m2 = ?,

                manual_area_mm2 = ?,
                manual_area_cm2 = ?,
                manual_outer_area_mm2 = ?,
                manual_holes_area_mm2 = ?,
                manual_width_mm = ?,
                manual_height_mm = ?,

                width_mm = ?,
                height_mm = ?,

                manual_calibration_px = ?,
                manual_calibration_mm = ?,
                manual_mm_per_px = ?,
                manual_polygon_json = ?,
                manual_holes_json = ?,
                manual_status = 'completed',

                scale_used = ?,
                scale_detected = ?,
                confidence = 'manual_validated',
                strategy_used = 'manual_tracing_with_exclusions',

                python_response = NULL,
                updated_at = NOW()
            WHERE id = ?
        ");

        $stmt->execute([
            $roiX,
            $roiY,
            $roiW,
            $roiH,

            $areaMm2,
            $areaCm2,
            $areaMm2 / 1000000,

            $areaMm2,
            $areaCm2,
            $outerAreaMm2,
            $holesAreaMm2,
            $widthMm,
            $heightMm,

            $widthMm,
            $heightMm,

            $calibrationPx,
            $calibrationMm,
            $mmPerPx,
            $manualPolygonJson,
            $manualHolesJson,

            $mmPerPx,
            'manual',

            $id
        ]);
    } else {
        $stmt = $pdo->prepare("
            UPDATE cad_area_jobs
            SET
                roi_x = COALESCE(?, roi_x),
                roi_y = COALESCE(?, roi_y),
                roi_width = COALESCE(?, roi_width),
                roi_height = COALESCE(?, roi_height),
                roi_page = 1,

                status = 'completed',
                message = 'Area calcolata tramite tracciamento manuale calibrato.',

                area_mm2 = ?,
                area_cm2 = ?,
                area_m2 = ?,

                manual_area_mm2 = ?,
                manual_area_cm2 = ?,
                manual_outer_area_mm2 = ?,
                manual_holes_area_mm2 = ?,
                manual_width_mm = ?,
                manual_height_mm = ?,

                width_mm = ?,
                height_mm = ?,

                manual_calibration_px = ?,
                manual_calibration_mm = ?,
                manual_mm_per_px = ?,
                manual_polygon_json = ?,
                manual_holes_json = ?,
                manual_status = 'completed',

                scale_used = ?,
                scale_detected = ?,
                confidence = 'manual_validated',
                strategy_used = 'manual_tracing_with_exclusions',

                python_response = NULL,
                updated_at = NOW()
            WHERE id = ?
            AND iduser = ?
        ");

        $stmt->execute([
            $roiX,
            $roiY,
            $roiW,
            $roiH,

            $areaMm2,
            $areaCm2,
            $areaMm2 / 1000000,

            $areaMm2,
            $areaCm2,
            $outerAreaMm2,
            $holesAreaMm2,
            $widthMm,
            $heightMm,

            $widthMm,
            $heightMm,

            $calibrationPx,
            $calibrationMm,
            $mmPerPx,
            $manualPolygonJson,
            $manualHolesJson,

            $mmPerPx,
            'manual',

            $id,
            $iduser
        ]);
    }

    if ($stmt->rowCount() === 0) {
        jsonResponse([
            'success' => false,
            'message' => 'Nessun record aggiornato. Controlla ID o utente.'
        ]);
    }

    jsonResponse([
        'success' => true,
        'message' => 'Area manuale salvata correttamente.',
        'area_mm2' => $areaMm2,
        'area_cm2' => $areaCm2,
        'outer_area_mm2' => $outerAreaMm2,
        'holes_area_mm2' => $holesAreaMm2
    ]);
} catch (Throwable $e) {
    error_log('CAD manual area save error: ' . $e->getMessage());

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