<?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\Reservation;
use App\Models\StudyTour;
use App\Models\Venue;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\DB;

class H5HomeController extends Controller
{
    public function index(): JsonResponse
    {
        $stats = [
            'reservation_total' => Reservation::query()->where('status', '!=', 'cancelled')->count(),
            'verified_total' => Reservation::query()->where('status', 'verified')->count(),
            'venue_total' => Venue::query()->where('is_active', true)->count(),
            'activity_total' => Activity::query()->where('is_active', true)->count(),
        ];

        $banners = Activity::query()
            ->where('is_active', true)
            ->whereNotNull('cover_image')
            ->where('cover_image', '!=', '')
            ->orderBy('sort')
            ->orderByDesc('id')
            ->limit(5)
            ->get(['id', 'title', 'summary', 'cover_image'])
            ->map(fn ($a) => [
                'id' => $a->id,
                'title' => $a->title,
                'summary' => $a->summary,
                'image' => $a->cover_image,
            ])
            ->values();

        $topLiveVenues = DB::table('reservations')
            ->join('venues', 'venues.id', '=', 'reservations.venue_id')
            ->where('reservations.status', '!=', 'cancelled')
            ->where('venues.is_active', true)
            ->select('venues.id', 'venues.name', DB::raw('SUM(COALESCE(reservations.ticket_count, 1)) as people_count'))
            ->groupBy('venues.id', 'venues.name')
            ->orderByDesc('people_count')
            ->limit(3)
            ->get()
            ->map(fn ($r) => [
                'id' => (int) $r->id,
                'name' => $r->name,
                'people_count' => (int) $r->people_count,
            ])
            ->values();

        $venueTypeColors = DictItem::query()
            ->where('dict_type', 'venue_type')
            ->where('is_active', true)
            ->pluck('item_remark', 'item_value');

        // 地图场馆：一次性返回全部有效坐标点（体量约百级，无需分页）
        $mapVenues = Venue::query()
            ->where('is_active', true)
            ->whereNotNull('lat')
            ->whereNotNull('lng')
            ->orderBy('sort')
            ->orderByDesc('id')
            ->get(['id', 'name', 'district', 'address', 'lat', 'lng', 'cover_image', 'venue_type', 'ticket_type'])
            ->map(function ($v) use ($venueTypeColors) {
                $raw = $venueTypeColors->get($v->venue_type);
                $color = '#05c9ac';
                if (is_string($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 [
                    'id' => $v->id,
                    'name' => $v->name,
                    'district' => $v->district,
                    'address' => $v->address,
                    'lat' => (float) $v->lat,
                    'lng' => (float) $v->lng,
                    'image' => $v->cover_image,
                    'venue_type' => $v->venue_type,
                    'ticket_type' => $v->ticket_type,
                    'venue_type_color' => $color,
                ];
            })
            ->values();

        $hotActivities = Activity::query()
            ->with('venue:id,name')
            ->with('activityDays')
            ->where('is_active', true)
            ->orderForH5Listing()
            ->limit(5)
            ->get(['id', 'venue_id', 'title', 'summary', 'cover_image', 'start_at', 'end_at', 'registered_count', 'address', 'tags', 'sort'])
            ->map(function ($a) {
                $isBookable = $a->activityDays->contains(
                    fn (ActivityDay $d) => $d->isCurrentlyBookable()
                );

                return [
                    'id' => $a->id,
                    'title' => $a->title,
                    'summary' => $a->summary,
                    'image' => $a->cover_image,
                    'venue_name' => $a->venue?->name,
                    'address' => $a->address,
                    'start_at' => optional($a->start_at)?->toIso8601String(),
                    'end_at' => optional($a->end_at)?->toIso8601String(),
                    'registered_count' => (int) ($a->registered_count ?? 0),
                    'is_bookable' => $isBookable,
                    'tags' => array_values($a->tags ?? []),
                ];
            })
            ->values();

        $rankings = $hotActivities->take(2)->values();

        $activeStudyTours = StudyTour::query()
            ->where('is_active', true)
            ->orderBy('sort')
            ->orderByDesc('id')
            ->limit(3)
            ->get(['id', 'name', 'tags', 'venue_ids', 'intro_html', 'cover_image']);

        $venueMap = Venue::query()
            ->whereIn('id', $activeStudyTours->pluck('venue_ids')->flatten()->filter()->values()->all())
            ->get(['id', 'name', 'cover_image'])
            ->keyBy('id');

        $studyTours = $activeStudyTours->map(function ($row) use ($venueMap) {
            $venueIds = collect($row->venue_ids ?? [])->values();
            $venueNames = $venueIds->map(fn ($id) => $venueMap->get($id)?->name)->filter()->values();
            $fallbackCover = $venueIds->map(fn ($id) => $venueMap->get($id)?->cover_image)->filter()->first();
            $tourCover = trim((string) ($row->cover_image ?? ''));

            return [
                'id' => $row->id,
                'name' => $row->name,
                'tags' => array_values($row->tags ?? []),
                'venue_names' => $venueNames,
                'cover_image' => $tourCover !== '' ? $tourCover : $fallbackCover,
            ];
        })->values();

        return response()->json([
            'stats' => $stats,
            'banners' => $banners,
            'top_live_venues' => $topLiveVenues,
            'map_venues' => $mapVenues,
            'rankings' => $rankings,
            'hot_activities' => $hotActivities,
            'study_tours' => $studyTours,
            'venue_dicts' => [
                'district' => DictItem::activeOptions('district'),
                'venue_type' => DictItem::activeOptions('venue_type'),
                'ticket_type' => DictItem::activeOptions('ticket_type'),
            ],
        ]);
    }
}