<?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\TicketGrabEvent;
use App\Models\Venue;
use App\Support\CalendarDateFormat;
use Carbon\Carbon;
use Illuminate\Http\JsonResponse;

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()->visibleOnH5()->count(),
            'activity_total' => Activity::query()->visibleOnH5()->count(),
            /** 在馆实时总人数；接入真实客流前固定为 0，勿用随机数 */
            'in_venue_total' => 0,
        ];

        $banners = Activity::query()
            ->visibleOnH5()
            ->whereNotNull('cover_image')
            ->where('cover_image', '!=', '')
            ->orderBy('sort')
            ->orderByDesc('id')
            ->limit(5)
            ->get(['id', 'title', 'summary', 'cover_image'])
            ->map(fn ($a) => [
                'id' => $a->id,
                'title' => $a->title,
                'summary' => $a->summary,
                'image' => $a->cover_image,
            ])
            ->values();

        /**
         * 在馆 Top3：接入按场馆真实在馆人数前，不返回用「预约票量」汇总的替代数据，避免与「在馆」混淆。
         * 需恢复时：按 reservations 或客流表重查，见 git 历史。
         */
        $topLiveVenues = [];

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

        // 全部场馆列表（不过滤经纬度，用于列表展示）
        $allVenues = Venue::query()
            ->visibleOnH5()
            ->orderBy('sort')
            ->orderByDesc('id')
            ->get()
            ->map(function ($v) use ($venueTypeColors) {
                $p = $v->toArray();
                $types = $p['venue_types'] ?? null;
                $firstType = (is_array($types) && count($types)) ? (string) ($types[0] ?? '') : ($p['venue_type'] ?? '');
                $raw = $venueTypeColors->get($firstType);
                $color = '#05c9ac';
                if (is_string($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' => (int) $p['id'],
                    'name' => $p['name'],
                    'sort' => (int) ($p['sort'] ?? 0),
                    'district' => $p['district'],
                    'address' => $p['address'],
                    'lat' => $p['lat'] ? (float) $p['lat'] : null,
                    'lng' => $p['lng'] ? (float) $p['lng'] : null,
                    'image' => $p['cover_image'],
                    'venue_type' => $p['venue_type'],
                    'venue_types' => is_array($types) ? array_values($types) : [],
                    'ticket_type' => $p['ticket_type'],
                    'appointment_type' => $p['appointment_type'],
                    'booking_mode' => $p['booking_mode'] ?? null,
                    'open_mode' => $p['open_mode'] ?? null,
                    'is_included_in_stats' => (bool) ($p['is_included_in_stats'] ?? false),
                    'venue_type_color' => $color,
                ];
            })
            ->values();

        // 地图场馆：只返回有经纬度的（用于地图标点）
        $mapVenues = $allVenues->filter(function ($v) {
            return $v['lat'] !== null && $v['lng'] !== null;
        })->values();

        $actRows = Activity::query()
            ->with('venue:id,name')
            ->with('activityDays')
            ->visibleOnH5()
            ->get(['id', 'venue_id', 'title', 'summary', 'cover_image', 'start_at', 'end_at', 'registered_count', 'address', 'tags', 'sort'])
            ->map(function ($a) {
                $isBookable = $a->activityDays->contains(
                    fn (ActivityDay $d) => $d->isCurrentlyBookable()
                );

                return [
                    'list_kind' => 'activity',
                    '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($a->end_at)?->toIso8601String(),
                    'schedule_status' => Activity::computeScheduleStatusFromBounds($a->start_at, $a->end_at),
                    'registered_count' => (int) ($a->registered_count ?? 0),
                    'is_bookable' => $isBookable,
                    'tags' => array_values($a->tags ?? []),
                ];
            });
        $tgRows = TicketGrabEvent::query()
            ->with('venues')
            ->visibleOnH5()
            ->get(['id', 'title', 'summary', 'cover_image', 'start_at', 'end_at', 'registered_count', 'address', 'tags', 'sort', 'booking_start_at', 'booking_end_at'])
            ->map(function ($e) {
                $first = $e->venues->first();
                $t = now()->toDateString();
                $bookable = $e->booking_start_at && $e->booking_end_at
                    && $t >= $e->booking_start_at->toDateString()
                    && $t <= $e->booking_end_at->toDateString()
                    && (! $e->end_at || $e->end_at->toDateString() >= $t);

                return [
                    'list_kind' => 'ticket_grab',
                    'id' => $e->id,
                    'title' => $e->title,
                    'summary' => $e->summary,
                    'image' => $e->cover_image,
                    'venue_name' => $first?->name,
                    'address' => $e->address,
                    'start_at' => CalendarDateFormat::ymdFromDatetime($e->start_at),
                    'end_at' => CalendarDateFormat::ymdFromDatetime($e->end_at),
                    'schedule_status' => TicketGrabEvent::computeScheduleStatusFromBounds($e->start_at, $e->end_at),
                    'registered_count' => (int) ($e->registered_count ?? 0),
                    'is_bookable' => $bookable,
                    'can_grab_today' => $e->canGrabToday(),
                    'venue_count' => $e->venues->count(),
                    'tags' => array_values($e->tags ?? []),
                ];
            });
        $controller = $this;
        $today = Carbon::now((string) config('app.timezone'))->toDateString();
        $hotActivities = $actRows->merge($tgRows)->sort(function (array $x, array $y) use ($today, $controller) {
            $sx = $controller->homeScheduleRank($x['start_at'] ?? null, $x['end_at'] ?? null, $today);
            $sy = $controller->homeScheduleRank($y['start_at'] ?? null, $y['end_at'] ?? null, $today);
            if ($sx !== $sy) {
                return $sx <=> $sy;
            }
            $a = $x['start_at'] ?? '';
            $b = $y['start_at'] ?? '';
            if ($a !== $b) {
                if ($a === '') {
                    return 1;
                }
                if ($b === '') {
                    return -1;
                }

                return strcmp((string) $a, (string) $b);
            }

            return (int) $y['id'] <=> (int) $x['id'];
        })->values()->take(5)->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,
            'all_venues' => $allVenues,
            'map_venues' => $mapVenues,
            'rankings' => $rankings,
            'hot_activities' => $hotActivities,
            'study_tours' => $studyTours,
            'venue_dicts' => [
                'district' => DictItem::activeOptions('district'),
                'venue_type' => DictItem::activeVenueTypeOptionsWithColor(),
                'venue_appointment_type' => DictItem::activeOptions('venue_appointment_type'),
                'venue_booking_mode' => DictItem::activeOptions('venue_booking_mode'),
                'venue_open_mode' => DictItem::activeOptions('venue_open_mode'),
                'ticket_type' => DictItem::activeOptions('ticket_type'),
            ],
        ]);
    }

    /**
     * 与活动列表 H5 混合排序：0 进行中/未结束, 1 未开始, 2 已结束.
     */
    private function homeScheduleRank(?string $startIso, ?string $endIso, string $today): int
    {
        $s = $startIso ? Carbon::parse($startIso)->toDateString() : null;
        $e = $endIso ? Carbon::parse($endIso)->toDateString() : null;
        if (! $e && ! $s) {
            return 0;
        }
        if ($e && $e < $today) {
            return 2;
        }
        if ($s && $s > $today) {
            return 1;
        }

        return 0;
    }
}