<?php

namespace App\Http\Controllers;

use App\Models\SesiTaklimat;
use App\Models\Sppm\Dun;
use Illuminate\Http\Request;

class SesiTaklimatController extends Controller
{
    /**
     * Senarai sesi taklimat. Pengurus & kaunter hanya nampak DUN sendiri.
     */
    public function index(Request $request)
    {
        $user = $request->user();

        $sesi = SesiTaklimat::withCount('kehadiran')
            ->when(! $user->isAdmin(), fn ($q) => $q->where('dun_id', $user->dun_id))
            ->orderByDesc('tarikh')
            ->get();

        $sesi->load('dun');

        return view('sesi.index', compact('sesi'));
    }

    public function create(Request $request)
    {
        $user = $request->user();

        $senaraiDun = Dun::where('is_active', true)
            ->when($user->isPengurus(), fn ($q) => $q->where('id', $user->dun_id))
            ->orderBy('code')
            ->get();

        return view('sesi.create', compact('senaraiDun'));
    }

    public function store(Request $request)
    {
        $user = $request->user();

        $data = $request->validate([
            // Beberapa sesi dibenarkan dalam satu hari bagi setiap DUN
            'dun_id' => ['required', 'integer'],
            'tarikh' => ['required', 'date'],
            'nama' => ['required', 'string', 'max:255'],
            'lokasi' => ['required', 'string', 'max:255'],
            'masa' => ['nullable', 'string', 'max:100'],
        ]);

        if ($user->isPengurus() && (int) $data['dun_id'] !== (int) $user->dun_id) {
            abort(403, 'Anda hanya boleh mencipta sesi untuk DUN anda sendiri.');
        }

        if (! Dun::where('id', $data['dun_id'])->where('is_active', true)->exists()) {
            return back()->withErrors(['dun_id' => 'DUN tidak sah.'])->withInput();
        }

        $data['created_by_user_id'] = $user->id;

        $sesi = SesiTaklimat::create($data);

        return redirect()->route('sesi.show', $sesi)->with('status', 'Sesi taklimat berjaya dicipta.');
    }

    public function show(Request $request, SesiTaklimat $sesi)
    {
        $this->pastikanAkses($request, $sesi);

        $sesi->load('dun');
        $sesi->loadCount([
            'kehadiran',
            'kehadiran as borang_diambil_count' => fn ($q) => $q->where('borang_diambil', true),
        ]);

        $checkinUrl = route('checkin.show', $sesi->qr_token);

        return view('sesi.show', compact('sesi', 'checkinUrl'));
    }

    /**
     * Papar QR untuk dicetak / dipamerkan di lokasi taklimat.
     */
    public function qr(Request $request, SesiTaklimat $sesi)
    {
        $this->pastikanAkses($request, $sesi);

        $sesi->load('dun');
        $checkinUrl = route('checkin.show', $sesi->qr_token);

        return view('sesi.qr', compact('sesi', 'checkinUrl'));
    }

    public function toggle(Request $request, SesiTaklimat $sesi)
    {
        $this->pastikanAkses($request, $sesi);

        $sesi->update(['is_active' => ! $sesi->is_active]);

        return back()->with('status', $sesi->is_active ? 'Sesi diaktifkan.' : 'Sesi ditutup.');
    }

    private function pastikanAkses(Request $request, SesiTaklimat $sesi): void
    {
        $user = $request->user();

        if (! $user->isAdmin() && (int) $sesi->dun_id !== (int) $user->dun_id) {
            abort(403, 'Sesi ini bukan untuk DUN anda.');
        }
    }
}