<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Activity;
use App\Models\ActivityDay;
use App\Models\DictItem;
use App\Models\StudyTour;
use App\Models\Venue;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class H5ContentController extends Controller
{
    public function activities(Request $request): JsonResponse
    {
        $size = max(1, min(30, (int) $request->input('page_size', 10)));
        $rows = Activity::query()
            ->with('venue:id,name,lat,lng')
            ->where('is_active', true)
            ->when($request->filled('keyword'), function ($q) use ($request) {
                $keyword = trim((string) $request->input('keyword'));
                $q->where('title', 'like', "%{$keyword}%");
            })
            ->orderForH5Listing()
            ->paginate($size);

        $rows->getCollection()->transform(function ($a) {
            return [
                'id' => $a->id,
                'title' => $a->title,
                'summary' => $a->summary,
                'image' => $a->cover_image,
                'venue_name' => $a->venue?->name,
                'address' => $a->address,
                'lat' => $a->lat,
                'lng' => $a->lng,
                'venue_lat' => $a->venue?->lat,
                'venue_lng' => $a->venue?->lng,
                'start_at' => optional($a->start_at)?->toIso8601String(),
                'end_at' => optional($a->end_at)?->toIso8601String(),
                'registered_count' => (int) ($a->registered_count ?? 0),
                'tags' => array_values($a->tags ?? []),
            ];
        });

        return response()->json($rows);
    }

    public function activityDetail(int $id): JsonResponse
    {
        $a = Activity::query()
            ->with([
                'venue:id,name,address,lat,lng,open_time,district,venue_type,ticket_type,unit_name',
                'activityDays',
            ])
            ->where('is_active', true)
            ->findOrFail($id);

        $isBookable = $a->activityDays->contains(
            fn (ActivityDay $d) => $d->isCurrentlyBookable()
        );

        return response()->json([
            'id' => $a->id,
            'title' => $a->title,
            'summary' => $a->summary,
            'detail_html' => $a->detail_html,
            'image' => $a->cover_image,
            'gallery_media' => $a->gallery_media ?? [],
            'carousel' => $this->buildGalleryCarousel($a),
            'venue' => $a->venue,
            'address' => $a->address,
            'lat' => $a->lat,
            'lng' => $a->lng,
            'start_at' => optional($a->start_at)?->toIso8601String(),
            'end_at' => optional($a->end_at)?->toIso8601String(),
            'registered_count' => (int) ($a->registered_count ?? 0),
            'tags' => array_values($a->tags ?? []),
            'reservation_notice' => $a->reservation_notice,
            'is_bookable' => $isBookable,
            'venue_type_color' => $this->resolveVenueTypeColor($a->venue?->venue_type),
        ]);
    }

    public function venues(): JsonResponse
    {
        $rows = Venue::query()
            ->where('is_active', true)
            ->orderBy('sort')
            ->orderByDesc('id')
            ->get(['id', 'name', 'district', 'address', 'lat', 'lng', 'cover_image', 'open_time']);

        return response()->json($rows);
    }

    public function venueDetail(int $id): JsonResponse
    {
        $v = Venue::query()->find($id);
        if ($v === null) {
            return response()->json(['message' => '场馆不存在'], 404);
        }
        if (! $v->is_active) {
            return response()->json(['message' => '场馆已下架'], 404);
        }

        $payload = $v->toArray();
        $payload['carousel'] = $this->buildGalleryCarousel($v);
        $payload['live_people_count'] = (int) ($v->live_people_count ?? 0);
        $payload['venue_type_color'] = $this->resolveVenueTypeColor($v->venue_type);

        return response()->json($payload);
    }

    /**
     * 轮播素材：gallery_media（可含图片/视频）；为空时用封面图兜底。
     *
     * @return array<int, array{type: string, url: string}>
     */
    private function buildGalleryCarousel(Venue|Activity $model): array
    {
        $items = [];
        $seen = [];

        foreach ($model->gallery_media ?? [] as $m) {
            if (! is_array($m)) {
                continue;
            }
            $url = trim((string) ($m['url'] ?? ''));
            if ($url === '' || isset($seen[$url])) {
                continue;
            }
            $type = $m['type'] ?? 'image';
            if (! in_array($type, ['image', 'video'], true)) {
                $type = 'image';
            }
            $seen[$url] = true;
            $items[] = ['type' => $type, 'url' => $url];
        }

        if ($items === [] && $model->cover_image) {
            $url = trim((string) $model->cover_image);
            if ($url !== '') {
                $items[] = ['type' => 'image', 'url' => $url];
            }
        }

        return $items;
    }

    /** 与首页地图场馆一致：字典 venue_type 的 item_remark 为色值 */
    private function resolveVenueTypeColor(?string $venueType): string
    {
        if ($venueType === null || $venueType === '') {
            return '#05c9ac';
        }

        $raw = DictItem::query()
            ->where('dict_type', 'venue_type')
            ->where('is_active', true)
            ->where('item_value', $venueType)
            ->value('item_remark');

        $color = '#05c9ac';
        if (is_string($raw) && trim($raw) !== '') {
            $t = trim($raw);
            if (! str_starts_with($t, '#')) {
                $t = '#'.$t;
            }
            if (preg_match('/^#([0-9A-Fa-f]{3}|[0-9A-Fa-f]{6})$/', $t)) {
                $color = $t;
            }
        }

        return $color;
    }

    public function studyTourDetail(int $id): JsonResponse
    {
        $row = StudyTour::query()->where('is_active', true)->findOrFail($id);
        $venueIds = collect($row->venue_ids ?? [])->filter()->values();
        $venueMap = Venue::query()
            ->whereIn('id', $venueIds->all())
            ->get(['id', 'name', 'district', 'address', 'cover_image', 'lat', 'lng'])
            ->keyBy('id');
        $venues = $venueIds->map(fn ($id) => $venueMap->get($id))->filter()->values();

        return response()->json([
            'id' => $row->id,
            'name' => $row->name,
            'tags' => array_values($row->tags ?? []),
            'intro_html' => $row->intro_html,
            'venues' => $venues,
        ]);
    }

    public function studyTours(): JsonResponse
    {
        $rows = StudyTour::query()
            ->where('is_active', true)
            ->orderBy('sort')
            ->orderByDesc('id')
            ->get(['id', 'name', 'tags', 'venue_ids', 'intro_html']);

        $venueIds = $rows->pluck('venue_ids')->flatten()->filter()->values()->all();
        $venueMap = Venue::query()
            ->whereIn('id', $venueIds)
            ->get(['id', 'name', 'district', 'address', 'cover_image', 'lat', 'lng'])
            ->keyBy('id');

        $payload = $rows->map(function ($row) use ($venueMap) {
            $ids = collect($row->venue_ids ?? [])->filter()->values();
            $firstVenue = $ids->isNotEmpty() ? $venueMap->get($ids->first()) : null;
            $venueNames = $ids->map(fn ($id) => $venueMap->get($id)?->name)->filter()->values();
            $cover = $ids->map(fn ($id) => $venueMap->get($id)?->cover_image)->filter()->first();

            return [
                'id' => $row->id,
                'name' => $row->name,
                'tags' => array_values($row->tags ?? []),
                'venue_names' => $venueNames->all(),
                'cover_image' => $cover ?: $firstVenue?->cover_image,
                'first_address' => $firstVenue?->address,
                'first_district' => $firstVenue?->district,
                'venue_count' => $ids->count(),
            ];
        })->values();

        return response()->json($payload);
    }

    public function venueDicts(): JsonResponse
    {
        return response()->json([
            'district' => DictItem::activeOptions('district'),
            'venue_type' => DictItem::activeOptions('venue_type'),
            'ticket_type' => DictItem::activeOptions('ticket_type'),
        ]);
    }
}