<?php

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Models\Siswa;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

class SiswaController extends Controller
{
    public function index(Request $request)
    {
        $perPage = (int) $request->input('per_page', 7);
        $perPage = in_array($perPage, [5, 7]) ? $perPage : 7;

        $search = trim((string) $request->input('search', ''));

        $query = Siswa::with(['user', 'jurusan'])->orderBy('id', 'desc');

        if ($search !== '') {
            $query->where(function ($q) use ($search) {
                $q->where('id_siswa', 'like', "%{$search}%")
                    ->orWhere('nama_lengkap', 'like', "%{$search}%")
                    ->orWhere('nisn', 'like', "%{$search}%")
                    ->orWhere('kelas', 'like', "%{$search}%")
                    ->orWhere('peminatan', 'like', "%{$search}%")
                    ->orWhereHas('user', function ($user) use ($search) {
                        $user->where('name', 'like', "%{$search}%")
                            ->orWhere('email', 'like', "%{$search}%");
                    })
                    ->orWhereHas('jurusan', function ($jurusan) use ($search) {
                        $jurusan->where('nama_jurusan', 'like', "%{$search}%");
                    });
            });
        }

        $siswa = $query->paginate($perPage);

        return response()->json([
            'success' => true,
            'data' => $siswa->items(),
            'current_page' => $siswa->currentPage(),
            'last_page' => $siswa->lastPage(),
            'per_page' => $siswa->perPage(),
            'total' => $siswa->total(),
            'from' => $siswa->firstItem(),
            'to' => $siswa->lastItem(),
        ], 200);
    }

    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'user_id' => 'required|exists:users,id|unique:siswas,user_id',
            'jurusan_id' => 'required|exists:jurusans,id',
            'nama_lengkap' => 'required|string|max:255',
            'nisn' => 'required|string|unique:siswas,nisn',
            'kelas' => 'required|string',
            'peminatan' => 'required|string',
        ], [
            'user_id.unique' => 'Gagal! Akun User ID ini sudah terikat dengan data siswa lain.',
            'nisn.unique' => 'Gagal! NISN ' . $request->nisn . ' sudah terdaftar di sistem.',
            'nama_lengkap.required' => 'Kolom nama lengkap tidak boleh dikosongkan.',
            'nisn.required' => 'Kolom NISN wajib diisi.',
            'user_id.exists' => 'User ID yang Anda masukkan tidak terdaftar di database.',
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'message' => 'Validasi gagal',
                'errors' => $validator->errors()
            ], 422);
        }

        $siswa = Siswa::create($request->all());

        return response()->json([
            'success' => true,
            'message' => 'Siswa ' . $siswa->id_siswa . ' (' . $siswa->nama_lengkap . ') berhasil ditambahkan.',
            'data' => $siswa
        ], 201);
    }

    public function show($id)
    {
        $siswa = Siswa::find($id);

        if (!$siswa) {
            return response()->json(['success' => false, 'message' => 'Data tidak ditemukan'], 404);
        }

        return response()->json(['success' => true, 'data' => $siswa], 200);
    }

    public function update(Request $request, $id)
    {
        $siswa = Siswa::find($id);

        if (!$siswa) {
            return response()->json(['success' => false, 'message' => 'Data tidak ditemukan'], 404);
        }

        $validator = Validator::make($request->all(), [
            'nama_lengkap' => 'required|string|max:255',
            'nisn' => 'required|string|unique:siswas,nisn,' . $id,
            'kelas' => 'required|string',
        ], [
            'nisn.unique' => 'Gagal Update! NISN ' . $request->nisn . ' sudah digunakan siswa lain.'
        ]);

        if ($validator->fails()) {
            return response()->json(['success' => false, 'errors' => $validator->errors()], 422);
        }

        $siswa->update($request->all());

        return response()->json([
            'success' => true,
            'message' => 'Data ' . $siswa->id_siswa . ' berhasil diperbarui'
        ], 200);
    }

    public function destroy($id)
    {
        $siswa = Siswa::find($id);

        if (!$siswa) {
            return response()->json(['success' => false, 'message' => 'Data tidak ditemukan'], 404);
        }

        $siswa->delete();

        return response()->json(['success' => true, 'message' => 'Data berhasil dihapus'], 200);
    }
}