<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Activity;
use App\Models\DictItem;
use App\Models\DictType;
use App\Support\ActivitySigninCodeSync;
use App\Support\ApiResponse;
use App\Support\ScheduleProgressStatus;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;

class ActivityController extends Controller
{
    use ApiResponse;

    public function index(Request $request): JsonResponse
    {
        $query = Activity::query()
            ->with(['activityTypeItem'])
            ->withCount(['sessions', 'signups']);

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

        $paginator = $query
            ->orderByDesc('id')
            ->paginate((int) $request->query('page_size', 20))
            ->withQueryString();

        $paginator->getCollection()->transform(fn (Activity $a) => $this->serializeList($a));

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

    public function store(Request $request): JsonResponse
    {
        if (! DictType::query()->where('code', 'activity_type')->where('status', 1)->exists()) {
            return $this->fail('字典「活动类型」未配置，请在后台维护数据字典或执行 ActivityDictionarySeeder', 422);
        }

        $data = $this->validatedActivity($request);
        $data['progress_status'] = ScheduleProgressStatus::resolve(
            $data['event_start_date'] ?? null,
            $data['event_end_date'] ?? null,
            $data['signup_start_date'] ?? null,
            $data['signup_end_date'] ?? null,
        );
        $activity = Activity::query()->create($data);
        ActivitySigninCodeSync::ensureActivityCode($activity->fresh());

        return $this->ok(['id' => $activity->id], '已创建');
    }

    public function show(int $activity): JsonResponse
    {
        $model = Activity::query()
            ->with(['activityTypeItem'])
            ->withCount(['sessions', 'signups'])
            ->findOrFail($activity);

        return $this->ok($this->serializeDetail($model));
    }

    public function update(Request $request, int $activity): JsonResponse
    {
        $model = Activity::query()->findOrFail($activity);
        $data = $this->validatedActivity($request, partial: true);
        $model->fill($data);
        $model->progress_status = ScheduleProgressStatus::resolve(
            $model->event_start_date?->toDateString(),
            $model->event_end_date?->toDateString(),
            $model->signup_start_date?->toDateString(),
            $model->signup_end_date?->toDateString(),
        );
        $model->save();
        ActivitySigninCodeSync::ensureActivityCode($model);

        return $this->ok(null, '已保存');
    }

    public function updateShelf(Request $request, int $activity): JsonResponse
    {
        $data = $request->validate([
            'published' => ['required', 'integer', 'in:0,1'],
        ]);
        $model = Activity::query()->findOrFail($activity);
        $model->published = (int) $data['published'];
        $model->save();

        return $this->ok(null, '已更新发布状态');
    }

    public function destroy(int $activity): JsonResponse
    {
        Activity::query()->findOrFail($activity)->delete();

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

    /**
     * @return array<string, mixed>
     */
    protected function validatedActivity(Request $request, bool $partial = false): array
    {
        $activityTypeId = DictType::query()->where('code', 'activity_type')->where('status', 1)->value('id');

        return $request->validate([
            'title' => [$partial ? 'sometimes' : 'required', 'string', 'max:255'],
            'activity_type_dict_item_id' => $this->dictItemRules($activityTypeId, $partial ? 'sometimes' : 'required'),
            'quota' => ['nullable', 'integer', 'min:0'],
            'event_start_date' => [$partial ? 'sometimes' : 'required', 'date'],
            'event_end_date' => $partial
                ? ['sometimes', 'date']
                : ['required', 'date', 'after_or_equal:event_start_date'],
            'signup_start_date' => [$partial ? 'sometimes' : 'required', 'date'],
            'signup_end_date' => $partial
                ? ['sometimes', 'date']
                : ['required', 'date', 'after_or_equal:signup_start_date'],
            'location' => ['nullable', 'string', 'max:255'],
            'intro_html' => ['nullable', 'string'],
            'published' => ['nullable', 'integer', 'in:0,1'],
            'remark' => ['nullable', 'string'],
            'sort' => ['nullable', 'integer'],
        ]);
    }

    /**
     * @return array<int, \Illuminate\Contracts\Validation\Rule|string>
     */
    protected function dictItemRules(?int $dictTypeId, string $presence): array
    {
        if (! $dictTypeId) {
            return match ($presence) {
                'required' => ['required', 'integer'],
                'sometimes' => ['sometimes', 'nullable', 'integer'],
                default => ['nullable', 'integer'],
            };
        }

        $exists = Rule::exists('dict_items', 'id')->where(
            fn ($q) => $q->where('dict_type_id', $dictTypeId)->where('status', 1)
        );

        return match ($presence) {
            'required' => ['required', 'integer', $exists],
            'sometimes' => ['sometimes', 'nullable', 'integer', $exists],
            default => ['nullable', 'integer', $exists],
        };
    }

    /**
     * @return array<string, mixed>
     */
    protected function serializeList(Activity $a): array
    {
        return [
            'id' => $a->id,
            'signin_code' => ActivitySigninCodeSync::activitySigninCode($a),
            'title' => $a->title,
            'activity_type_dict_item_id' => $a->activity_type_dict_item_id,
            'activity_type_item' => $this->serializeDictItem($a->activityTypeItem),
            'quota' => (int) $a->quota,
            'event_start_date' => $a->event_start_date?->toDateString(),
            'event_end_date' => $a->event_end_date?->toDateString(),
            'signup_start_date' => $a->signup_start_date?->toDateString(),
            'signup_end_date' => $a->signup_end_date?->toDateString(),
            'location' => $a->location,
            'progress_status' => ScheduleProgressStatus::resolve(
                $a->event_start_date?->toDateString(),
                $a->event_end_date?->toDateString(),
                $a->signup_start_date?->toDateString(),
                $a->signup_end_date?->toDateString(),
            ),
            'published' => (int) $a->published,
            'sessions_count' => (int) ($a->sessions_count ?? 0),
            'signups_count' => (int) ($a->signups_count ?? 0),
            'created_at' => $a->created_at?->toIso8601String(),
        ];
    }

    /**
     * @return array<string, mixed>
     */
    protected function serializeDetail(Activity $a): array
    {
        $row = $this->serializeList($a);
        $row['intro_html'] = $a->intro_html;
        $row['remark'] = $a->remark;

        return $row;
    }

    /**
     * @return array{id:int,label:string,value:string}|null
     */
    protected function serializeDictItem(?DictItem $item): ?array
    {
        if (! $item) {
            return null;
        }

        return [
            'id' => $item->id,
            'label' => $item->label,
            'value' => $item->value,
        ];
    }
}