<?php
session_start();
require_once __DIR__ . '/db/config.php';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $client_name = trim($_POST['client_name'] ?? '');
    $address = trim($_POST['address'] ?? '');
    $technician_name = trim($_POST['technician_name'] ?? '');
    $observations = trim($_POST['observations'] ?? '');
    $status = trim($_POST['status'] ?? 'ativo');
    $voltage = trim($_POST['voltage'] ?? null);
    $phase_neutral_ground = trim($_POST['phase_neutral_ground'] ?? null);
    $breaker_output = trim($_POST['breaker_output'] ?? null);

    // Validation removed to allow incomplete forms

    $pdo = db();
    try {
        $pdo->beginTransaction();

        $stmt = $pdo->prepare(
            "INSERT INTO installations (client_name, address, technician_name, observations, status, voltage, phase_neutral_ground, breaker_output) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
        );
        $stmt->execute([$client_name, $address, $technician_name, $observations, $status, $voltage, $phase_neutral_ground, $breaker_output]);
        $installation_id = $pdo->lastInsertId();

        // Handle multiple file uploads
        if (isset($_FILES['images'])) {
            $upload_dir = __DIR__ . '/assets/uploads/';
            if (!is_dir($upload_dir)) {
                mkdir($upload_dir, 0775, true);
            }

            $allowed_ext = ['jpg', 'jpeg', 'png', 'gif'];

            foreach ($_FILES['images']['tmp_name'] as $key => $tmp_name) {
                if ($_FILES['images']['error'][$key] === UPLOAD_ERR_OK) {
                    $file_name = $_FILES['images']['name'][$key];
                    $file_ext = strtolower(pathinfo($file_name, PATHINFO_EXTENSION));

                    if (in_array($file_ext, $allowed_ext)) {
                        $new_file_name = time() . '_' . uniqid() . '_' . basename($file_name);
                        $dest_path = $upload_dir . $new_file_name;

                        if (move_uploaded_file($tmp_name, $dest_path)) {
                            $image_path = 'assets/uploads/' . $new_file_name;
                            $img_stmt = $pdo->prepare("INSERT INTO installation_images (installation_id, image_path) VALUES (?, ?)");
                            $img_stmt->execute([$installation_id, $image_path]);
                        } else {
                            throw new Exception('Falha ao mover o arquivo enviado: ' . $file_name);
                        }
                    } else {
                        throw new Exception('Tipo de arquivo inválido: ' . $file_name);
                    }
                }
            }
        }

        $pdo->commit();
        $_SESSION['message'] = 'Instalação registrada com sucesso!';
        $_SESSION['message_type'] = 'success';

    } catch (Exception $e) {
        if ($pdo->inTransaction()) {
            $pdo->rollBack();
        }
        error_log("Upload/Database error: " . $e->getMessage());
        $_SESSION['message'] = 'Falha ao registrar a instalação: ' . $e->getMessage();
        $_SESSION['message_type'] = 'danger';
    }
}

header('Location: index.php');
exit;