<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Activity;
use App\Models\ActivitySession;
use App\Models\ActivitySignup;
use App\Models\ActivitySignupCheckin;
use App\Support\ApiResponse;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class ActivitySignupController extends Controller
{
    use ApiResponse;

    public function index(Request $request, int $activity): JsonResponse
    {
        Activity::query()->findOrFail($activity);
        $sessionId = $request->query('activity_session_id');
        $checkinStatus = $request->query('checkin_status');

        $query = ActivitySignup::query()->where('activity_id', $activity)->orderByDesc('id');

        if ($kw = $request->query('keyword')) {
            $query->where(function ($q) use ($kw) {
                $q->where('name', 'like', "%{$kw}%")
                    ->orWhere('mobile', 'like', "%{$kw}%")
                    ->orWhere('company', 'like', "%{$kw}%");
            });
        }

        if ($sessionId) {
            $sid = (int) $sessionId;
            $query->where('activity_session_id', $sid);
            if ((string) $checkinStatus === '1') {
                $query->whereHas('checkins', function ($q) use ($sid) {
                    $q->where('activity_session_id', $sid)->whereNotNull('checked_in_at');
                });
            } elseif ((string) $checkinStatus === '0') {
                $query->whereDoesntHave('checkins', function ($q) use ($sid) {
                    $q->where('activity_session_id', $sid)->whereNotNull('checked_in_at');
                });
            }
        }

        $paginator = $query
            ->with(['checkins' => function ($q) use ($sessionId) {
                if ($sessionId) {
                    $q->where('activity_session_id', (int) $sessionId);
                }
            }])
            ->paginate((int) $request->query('page_size', 20))
            ->withQueryString();

        $paginator->getCollection()->transform(
            fn (ActivitySignup $r) => $this->serialize($r, $sessionId ? (int) $sessionId : null)
        );

        return $this->paginated($paginator);
    }

    public function store(Request $request, int $activity): JsonResponse
    {
        Activity::query()->findOrFail($activity);
        $data = $request->validate([
            'activity_session_id' => ['nullable', 'integer', 'exists:activity_sessions,id'],
            'name' => ['required', 'string', 'max:64'],
            'mobile' => ['required', 'string', 'max:32'],
            'company' => ['nullable', 'string', 'max:128'],
        ]);

        if (! empty($data['activity_session_id'])) {
            $sid = (int) $data['activity_session_id'];
            $ok = ActivitySession::query()->where('activity_id', $activity)->where('id', $sid)->exists();
            if (! $ok) {
                return $this->fail('场次不属于该活动', 422);
            }
        }

        $signup = ActivitySignup::query()->create([
            'activity_id' => $activity,
            'activity_session_id' => $data['activity_session_id'] ?? null,
            'name' => $data['name'],
            'mobile' => $data['mobile'],
            'company' => $data['company'] ?? null,
            'signed_up_at' => now(),
            'status' => 1,
        ]);

        return $this->ok(['id' => $signup->id], '报名已登记');
    }

    public function destroy(int $activity, int $signup): JsonResponse
    {
        $model = ActivitySignup::query()->where('activity_id', $activity)->findOrFail($signup);
        $model->delete();

        return $this->ok(null, '已删除');
    }

    public function checkin(Request $request, int $activity, int $signup): JsonResponse
    {
        Activity::query()->findOrFail($activity);
        $model = ActivitySignup::query()->where('activity_id', $activity)->findOrFail($signup);

        $data = $request->validate([
            'activity_session_id' => ['required', 'integer', 'exists:activity_sessions,id'],
        ]);

        $sessionId = (int) $data['activity_session_id'];
        $ok = ActivitySession::query()->where('activity_id', $activity)->where('id', $sessionId)->exists();
        if (! $ok) {
            return $this->fail('场次不属于该活动', 422);
        }

        ActivitySignupCheckin::query()->updateOrCreate(
            [
                'activity_signup_id' => $model->id,
                'activity_session_id' => $sessionId,
            ],
            ['checked_in_at' => now()]
        );

        return $this->ok(null, '签到成功');
    }

    /**
     * @return array<string, mixed>
     */
    protected function serialize(ActivitySignup $r, ?int $sessionId = null): array
    {
        $sessionCheckedInAt = null;
        if ($sessionId) {
            $checkin = $r->relationLoaded('checkins')
                ? $r->checkins->first()
                : $r->checkins()->where('activity_session_id', $sessionId)->first();
            $sessionCheckedInAt = $checkin?->checked_in_at;
        }

        return [
            'id' => $r->id,
            'activity_id' => $r->activity_id,
            'activity_session_id' => $r->activity_session_id,
            'name' => $r->name,
            'mobile' => $r->mobile,
            'company' => $r->company,
            'signed_up_at' => $r->signed_up_at?->toIso8601String(),
            'status' => (int) $r->status,
            'activity_session_id_filter' => $sessionId,
            'session_checked_in_at' => $sessionCheckedInAt?->toIso8601String(),
        ];
    }
}