<?php

namespace App\Http\Controllers\Api;

use App\Models\Student;
use App\Models\User;
use Carbon\Carbon;
use Illuminate\Support\Facades\DB;
use Symfony\Component\HttpFoundation\Response;

class RFIDController extends BaseApiController
{
    protected User $user;
    protected Student $student;

    public function __construct()
    {
        parent::__construct();
        $this->user    = model(User::class);
        $this->student = model(Student::class);
    }

    public function process()
    {
        $data = $this->payloadData();
        if (empty($data)) {
            return $this->error('Invalid request data', Response::HTTP_BAD_REQUEST);
        }

        $rules = [
            'rfid' => 'required',
        ];

        $errors = $this->validateRequest($data, $rules);
        if (!empty($errors)) {
            return $this->respondValidationError($errors);
        }

        try {
            $rfidTag = $data['rfid'];

            $user = $this->user->where('rfid_tag', $rfidTag)->first();

            $student = null;
            if (!$user) {
                $student = $this->student->where('rfid_tag', $rfidTag)->first();
            }

            if (!$user && !$student) {
                return $this->error('RFID tag not recognized', Response::HTTP_NOT_FOUND);
            }

            $logData = [
                'user_id'    => $user['id'] ?? null,
                'student_id' => $student['id'] ?? null,
                'card_id'    => $rfidTag,
                'scan_time'  => Carbon::now('UTC')->toDateTimeString(),
            ];

            DB::table('scan_log')->insert($logData);

            $result = [
                'rfid_tag' => $rfidTag,
                'user'     => $user ? [
                    'id'   => $user['id'],
                    'name' => trim(($user['firstname'] ?? '') . ' ' . ($user['lastname'] ?? '')),
                ] : null,
                'student'  => $student ? [
                    'id'   => $student['id'],
                    'name' => trim(($student['firstname'] ?? '') . ' ' . ($student['lastname'] ?? '')),
                ] : null,
            ];

            return $this->success($result, 'RFID processed successfully');
        } catch (\Throwable $e) {
            log_message('error', 'RFID process error: ' . $e->getMessage());
            return $this->respondError('Failed to process RFID', Response::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    public function logs()
    {
        $page    = max(1, (int) ($this->request->getGet('page') ?? 1));
        $perPage = min(100, max(1, (int) ($this->request->getGet('per_page') ?? 20)));

        try {
            $builder = DB::table('scan_log as sl')
                ->select([
                    'u.firstname as user_firstname',
                    'u.lastname as user_lastname',
                    's.firstname as student_firstname',
                    's.lastname as student_lastname',
                    'sl.card_id',
                    'sl.scan_time',
                ])
                ->leftJoin('users as u', 'u.id', '=', 'sl.user_id')
                ->leftJoin('students as s', 's.rfid_tag', '=', 'sl.card_id');

            $offset = ($page - 1) * $perPage;

            $total = (clone $builder)->count();

            $logs = (clone $builder)
                ->orderBy('sl.scan_time', 'DESC')
                ->offset($offset)
                ->limit($perPage)
                ->get()
                ->toArray();

            $result = [
                'data' => $logs,
                'pagination' => [
                    'current_page' => $page,
                    'per_page'     => $perPage,
                    'total'        => $total,
                    'total_pages'  => (int) ceil($total / $perPage),
                ],
            ];

            return $this->success($result, 'RFID scan logs retrieved successfully');
        } catch (\Throwable $e) {
            log_message('error', 'RFID logs error: ' . $e->getMessage());
            return $this->respondError('Failed to retrieve RFID logs', Response::HTTP_INTERNAL_SERVER_ERROR);
        }
    }
}