<?php

namespace App\Http\Controllers\Miniapp;

use App\Http\Controllers\Miniapp\BaseController;
use App\Models\Activity;
use App\Models\ActivitySession;
use App\Models\ActivitySignup;
use App\Models\MiniappUser;
use App\Support\ApiResponse;
use App\Support\Miniapp\MiniappPresenter;
use App\Support\ScheduleProgressStatus;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class ActivityController extends BaseController
{
    use ApiResponse;

    public function index(Request $request): JsonResponse
    {
        $user = $this->optionalUser($request);
        $pageSize = (int) $request->query('page_size', 20);
        $page = max(1, (int) $request->query('page', 1));

        if ($request->filled('progress_status')) {
            $statusFilter = (int) $request->query('progress_status');
            $activities = $this->publishedQuery($request)
                ->orderByDesc('event_start_date')
                ->orderByDesc('id')
                ->get()
                ->filter(fn (Activity $activity) => MiniappPresenter::resolveActivityProgressStatus($activity) === $statusFilter)
                ->values();

            $total = $activities->count();
            $items = $activities
                ->slice(($page - 1) * $pageSize, $pageSize)
                ->map(function (Activity $activity) use ($user) {
                    $row = MiniappPresenter::serializeActivityList($activity, $user);
                    $row['summary'] = strip_tags((string) $activity->intro_html);

                    return $row;
                })
                ->values()
                ->all();

            return $this->ok([
                'items' => $items,
                'meta' => [
                    'current_page' => $page,
                    'per_page' => $pageSize,
                    'total' => $total,
                    'last_page' => max(1, (int) ceil($total / $pageSize)),
                ],
            ]);
        }

        $paginator = $this->publishedQuery($request)
            ->orderByDesc('event_start_date')
            ->orderByDesc('id')
            ->paginate($pageSize)
            ->withQueryString();

        $paginator->getCollection()->transform(function (Activity $activity) use ($user) {
            $row = MiniappPresenter::serializeActivityList($activity, $user);
            $row['summary'] = strip_tags((string) $activity->intro_html);

            return $row;
        });

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

    public function show(Request $request, int $activity): JsonResponse
    {
        $user = $this->optionalUser($request);
        $model = Activity::query()
            ->with(['activityTypeItem', 'sessions' => fn ($q) => $q->orderBy('sort')->orderBy('id')])
            ->withCount('signups')
            ->where('published', 1)
            ->findOrFail($activity);

        $row = MiniappPresenter::serializeActivityList($model, $user);
        $row['summary'] = strip_tags((string) $model->intro_html);
        $row['sessions'] = $model->sessions
            ->map(fn (ActivitySession $session) => MiniappPresenter::serializeActivitySession($session, $user))
            ->values()
            ->all();

        return $this->ok($row);
    }

    public function signup(Request $request, int $activity): JsonResponse
    {
        /** @var MiniappUser $user */
        $user = $request->user();
        $model = Activity::query()->where('published', 1)->findOrFail($activity);

        if (MiniappPresenter::activityDisplayStatus($model) !== '报名中') {
            return $this->fail('当前不在报名期', 422);
        }

        $data = $request->validate([
            'activity_session_id' => ['required', 'integer', 'exists:activity_sessions,id'],
            'name' => ['required', 'string', 'max:64'],
            'mobile' => ['nullable', 'string', 'max:32'],
            'company' => ['nullable', 'string', 'max:128'],
        ]);

        $session = ActivitySession::query()
            ->where('activity_id', $activity)
            ->findOrFail((int) $data['activity_session_id']);

        if (ActivitySignup::query()
            ->where('activity_session_id', $session->id)
            ->where('miniapp_user_id', $user->id)
            ->exists()) {
            return $this->fail('您已报名该场次', 422);
        }

        $signed = $session->signups()->count();
        $capacity = (int) ($session->capacity ?? 0);
        if ($capacity > 0 && $signed >= $capacity) {
            return $this->fail('该场次名额已满', 422);
        }

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

        if (! $user->name) {
            $user->name = $data['name'];
        }
        if (! $user->mobile && ! empty($data['mobile'])) {
            $user->mobile = $data['mobile'];
        }
        if (! $user->company && ! empty($data['company'])) {
            $user->company = $data['company'];
        }
        $user->save();

        return $this->ok(null, '报名成功');
    }

    public function mySignups(Request $request): JsonResponse
    {
        /** @var MiniappUser $user */
        $user = $request->user();

        $signups = ActivitySignup::query()
            ->with(['activity.activityTypeItem', 'session'])
            ->where('miniapp_user_id', $user->id)
            ->orderByDesc('id')
            ->get()
            ->map(function (ActivitySignup $signup) use ($user) {
                $activity = $signup->activity;
                if (! $activity) {
                    return null;
                }

                $row = MiniappPresenter::serializeActivityList($activity, $user);
                $row['summary'] = strip_tags((string) $activity->intro_html);
                $row['session'] = $signup->session
                    ? MiniappPresenter::serializeActivitySession($signup->session, $user)
                    : null;

                return $row;
            })
            ->filter()
            ->values()
            ->all();

        return $this->ok(['items' => $signups]);
    }

    public function calendar(Request $request): JsonResponse
    {
        $data = $request->validate([
            'month' => ['required', 'date_format:Y-m'],
        ]);

        [$year, $month] = array_map('intval', explode('-', $data['month']));
        $monthStart = sprintf('%04d-%02d-01', $year, $month);
        $monthEnd = date('Y-m-t', strtotime($monthStart));

        $sessions = ActivitySession::query()
            ->with('activity')
            ->whereHas('activity', fn ($q) => $q->where('published', 1))
            ->orderBy('starts_at')
            ->orderBy('id')
            ->get();

        $events = $sessions->map(function (ActivitySession $session) {
            $activity = $session->activity;
            if (! $activity) {
                return null;
            }

            $startDate = $session->starts_at?->toDateString();
            $endDate = $session->ends_at?->toDateString() ?: $startDate;
            $progressStatus = $startDate
                ? ScheduleProgressStatus::resolve($startDate, $endDate)
                : MiniappPresenter::resolveActivityProgressStatus($activity);

            $sessionTitle = trim((string) $session->title);
            $title = $sessionTitle !== ''
                ? $activity->title.' · '.$sessionTitle
                : $activity->title;

            return [
                'id' => $session->id,
                'activity_id' => $activity->id,
                'title' => $title,
                'start_date' => $startDate,
                'end_date' => $endDate,
                'time_range' => MiniappPresenter::timeRange(
                    $session->starts_at?->format('H:i'),
                    $session->ends_at?->format('H:i')
                ),
                'location' => $session->venue ?: $activity->location,
                'progress_status' => $progressStatus,
                'progress_status_label' => MiniappPresenter::progressStatusLabel($progressStatus),
            ];
        })->filter(function (?array $event) use ($monthStart, $monthEnd) {
            if (! $event || ! $event['start_date']) {
                return false;
            }
            $start = $event['start_date'];
            $end = $event['end_date'] ?: $start;

            return $start <= $monthEnd && $end >= $monthStart;
        })->values();

        return $this->ok([
            'month' => $data['month'],
            'events' => $events,
        ]);
    }

    protected function publishedQuery(Request $request)
    {
        $query = Activity::query()
            ->with(['activityTypeItem', 'sessions'])
            ->withCount(['sessions', 'signups'])
            ->where('published', 1);

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

        if ($request->filled('activity_type_dict_item_id')) {
            $query->where('activity_type_dict_item_id', (int) $request->query('activity_type_dict_item_id'));
        }

        return $query;
    }
}