<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\DictItem;
use App\Support\HtmlToPlainText;
use App\Models\StudyTour;
use App\Models\Venue;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\Rule;

class VenueController extends Controller
{
    public function store(Request $request): JsonResponse
    {
        $user = $request->user();
        abort_unless($user && ($user->isSuperAdmin() || $user->role === 'venue_admin'), 403, '无权限');

        $data = $request->validate([
            'name' => ['required', 'string', 'max:120'],
            'venue_type' => ['nullable', 'string', 'max:80'],
            'venue_types' => ['nullable', 'array'],
            'venue_types.*' => ['string', 'max:80'],
            'unit_name' => ['nullable', 'string', 'max:120'],
            'district' => ['nullable', 'string', 'max:80'],
            'ticket_type' => ['nullable', 'string', 'max:80'],
            'appointment_type' => ['nullable', 'string', 'max:40'],
            'booking_mode' => ['nullable', 'string', 'max:50', Rule::in(['team_only', 'all_required', 'team_required'])],
            'open_mode' => ['nullable', 'string', 'max:40', Rule::in(['fulltime', 'scheduled', 'appointment'])],
            'open_time' => ['nullable', 'string', 'max:65535'],
            'reservation_notice' => ['nullable', 'string'],
            'ticket_content' => ['nullable', 'string'],
            'booking_method' => ['nullable', 'string'],
            'visit_form' => ['nullable', 'string'],
            'consultation_hours' => ['nullable', 'string'],
            'booking_qr_media' => ['nullable', 'array', 'max:20'],
            'booking_qr_media.*.type' => ['required_with:booking_qr_media', 'in:image'],
            'booking_qr_media.*.url' => ['required_with:booking_qr_media', 'string', 'max:255'],
            'address' => ['nullable', 'string', 'max:255'],
            'contact_phone' => ['nullable', 'string', 'max:255'],
            'lat' => ['nullable', 'numeric'],
            'lng' => ['nullable', 'numeric'],
            'cover_image' => ['nullable', 'string', 'max:255'],
            'gallery_media' => ['nullable', 'array'],
            'gallery_media.*.type' => ['required_with:gallery_media', 'in:image,video'],
            'gallery_media.*.url' => ['required_with:gallery_media', 'string', 'max:255'],
            'detail_html' => ['nullable', 'string'],
            'live_people_count' => ['nullable', 'integer', 'min:0'],
            'sort' => ['nullable', 'integer', 'min:0'],
            'is_active' => ['boolean'],
            'is_included_in_stats' => ['boolean'],
        ]);

        $auditStatus = $user->isSuperAdmin() ? Venue::AUDIT_APPROVED : Venue::AUDIT_PENDING;

        $venue = Venue::create($data + [
            'is_active' => $data['is_active'] ?? true,
            'audit_status' => $auditStatus,
            'audit_remark' => null,
            'last_approved_snapshot' => null,
        ]);

        if (! $user->isSuperAdmin()) {
            $user->venues()->syncWithoutDetaching([$venue->id]);
        }

        return response()->json($venue->fresh(), 201);
    }

    /**
     * 超级管理员导出全部场馆为 CSV（UTF-8 BOM，便于 Excel 打开）。
     * 前 22 列与 {@see \App\Services\VenueImportService::buildTemplateSpreadsheet()} 表头、列顺序一致（主题为导入同款英文逗号拼接；预约方式去 HTML 标签为纯文本；场馆详情保留内容便于再导入为富文本）。
     */
    public function export(Request $request)
    {
        $user = $request->user();
        abort_unless($user && $user->isSuperAdmin(), 403, '仅超级管理员可导出');

        $dictMaps = $this->buildDictLabelMaps();
        $rows = Venue::query()->orderBy('sort')->orderByDesc('id')->get();
        $filename = '场馆导出-'.now()->format('Ymd-His').'.csv';

        return response()->streamDownload(function () use ($rows, $dictMaps) {
            $out = fopen('php://output', 'w');
            fprintf($out, chr(0xEF).chr(0xBB).chr(0xBF));
            // 与导入模板首行一致，另附系统用列（与 VenueImportService::$headers 顺序对齐）
            fputcsv($out, array_merge([
                '场馆名称', '主题', '行政区', '预约类型', '门票类型', '预约模式', '开放模式', '所属单位', '预约方式', '参观形式', '开放时间', '咨询预约时间', '咨询预约联系电话', '排序', '启用', '纳入人数统计', '场馆地址', '经度', '纬度', '门票说明', '场馆详情', '预约须知',
            ], [
                '编号', '预约二维码', '封面图', '轮播图与视频', '实时在馆人数', '审核状态', '审核备注', '创建时间', '更新时间',
            ]));
            foreach ($rows as $v) {
                fputcsv($out, array_merge([
                    $this->csvCell($v->name),
                    $this->formatVenueThemeForExport($v, $dictMaps),
                    $this->dictLabel($dictMaps, 'district', $v->district),
                    $this->dictLabel($dictMaps, 'venue_appointment_type', $v->appointment_type),
                    $this->dictLabel($dictMaps, 'ticket_type', $v->ticket_type),
                    $this->dictLabel($dictMaps, 'venue_booking_mode', $v->booking_mode),
                    $this->dictLabel($dictMaps, 'venue_open_mode', $v->open_mode),
                    $this->csvCell($v->unit_name),
                    $this->plainTextFromHtmlForCsv($v->booking_method),
                    $this->csvCell($v->visit_form),
                    $this->csvCell($v->open_time),
                    $this->csvCell($v->consultation_hours),
                    $this->csvCell($v->contact_phone),
                    (int) ($v->sort ?? 0),
                    $v->is_active ? '是' : '否',
                    $v->is_included_in_stats ? '是' : '否',
                    $this->csvCell($v->address),
                    $v->lng,
                    $v->lat,
                    $this->csvCell($v->ticket_content),
                    $this->csvCell($v->detail_html),
                    $this->csvCell($v->reservation_notice),
                ], [
                    $v->id,
                    $this->formatMediaUrlsFromArray($v->booking_qr_media, 'url'),
                    $this->csvCell($v->cover_image),
                    $this->formatMediaUrlsFromArray($v->gallery_media, 'url', true),
                    (int) ($v->live_people_count ?? 0),
                    $this->auditStatusLabelChinese($v->audit_status),
                    $this->csvCell($v->audit_remark),
                    $v->created_at?->format('Y-m-d H:i:s') ?? '',
                    $v->updated_at?->format('Y-m-d H:i:s') ?? '',
                ]));
            }
            fclose($out);
        }, $filename, ['Content-Type' => 'text/csv; charset=UTF-8']);
    }

    /**
     * @return array<string, array<string, string>> dict_type => item_value => item_label
     */
    private function buildDictLabelMaps(): array
    {
        $types = [
            'district',
            'venue_type',
            'ticket_type',
            'venue_appointment_type',
            'venue_booking_mode',
            'venue_open_mode',
        ];
        $rows = DictItem::query()
            ->whereIn('dict_type', $types)
            ->where('is_active', true)
            ->get(['dict_type', 'item_value', 'item_label']);

        $maps = array_fill_keys($types, []);
        foreach ($rows as $r) {
            $maps[$r->dict_type][(string) $r->item_value] = (string) $r->item_label;
        }

        return $maps;
    }

    /**
     * @param  array<string, array<string, string>>  $maps
     */
    private function dictLabel(array $maps, string $type, ?string $value): string
    {
        if ($value === null || $value === '') {
            return '';
        }
        $key = (string) $value;

        return $maps[$type][$key] ?? $key;
    }

    /**
     * @param  array<string, array<string, string>>  $maps
     */
    private function formatVenueThemeForExport(Venue $v, array $maps): string
    {
        $list = $v->venue_types;
        if (is_array($list) && count($list) > 0) {
            $labels = [];
            foreach ($list as $tv) {
                $tv = (string) $tv;
                $labels[] = $this->dictLabel($maps, 'venue_type', $tv) ?: $tv;
            }
            $labels = array_values(array_unique($labels));

            // 与导入模板「主题」一致：多个主题用英文逗号分隔（normalizeRowFromCells 按英文逗号拆分）
            return $this->csvCell(implode(',', $labels));
        }

        return $this->csvCell($this->dictLabel($maps, 'venue_type', $v->venue_type));
    }

    /**
     * @param  array<int, array<string, mixed>>|null  $items
     */
    private function formatMediaUrlsFromArray($items, string $key = 'url', bool $includeType = false): string
    {
        if (! is_array($items) || $items === []) {
            return '';
        }
        $parts = [];
        foreach ($items as $it) {
            if (! is_array($it)) {
                continue;
            }
            $u = (string) ($it[$key] ?? '');
            if ($u === '') {
                continue;
            }
            if ($includeType && isset($it['type'])) {
                $parts[] = (string) $it['type'].': '.$u;
            } else {
                $parts[] = $u;
            }
        }

        return $this->csvCell(implode('；', $parts));
    }

    private function auditStatusLabelChinese(?string $s): string
    {
        return match ($s) {
            Venue::AUDIT_APPROVED => '已通过',
            Venue::AUDIT_PENDING => '待审核',
            Venue::AUDIT_REJECTED => '已退回',
            default => (string) ($s ?? ''),
        };
    }

    private function plainTextFromHtmlForCsv(?string $html): string
    {
        if ($html === null || $html === '') {
            return '';
        }
        $t = HtmlToPlainText::toSingleLine($html) ?? '';
        if (function_exists('mb_strlen') && mb_strlen($t, 'UTF-8') > 10000) {
            $t = mb_substr($t, 0, 10000, 'UTF-8').'…';
        }

        return $this->csvCell($t);
    }

    private function csvCell(?string $value): string
    {
        if ($value === null || $value === '') {
            return '';
        }

        return str_replace(["\r\n", "\r", "\n"], ' ', $value);
    }

    public function index(Request $request): JsonResponse
    {
        $user = $request->user();
        $keyword = trim((string) $request->string('keyword'));
        $district = trim((string) $request->string('district'));
        $venueType = trim((string) $request->string('venue_type'));
        $ticketType = trim((string) $request->string('ticket_type'));
        $bookingMode = trim((string) $request->string('booking_mode'));
        $openMode = trim((string) $request->string('open_mode'));
        $appointmentType = trim((string) $request->string('appointment_type'));
        $bookingMethodFilled = $request->input('booking_method_filled');
        $isActive = $request->input('is_active');
        $isIncludedInStats = $request->input('is_included_in_stats');
        $auditStatus = trim((string) $request->string('audit_status'));

        if ($user->isSuperAdmin()) {
            $query = Venue::query();
        } else {
            $query = $user->venues();
        }

        if ($keyword !== '') {
            $query->where(function ($q) use ($keyword) {
                $q->where('name', 'like', '%'.$keyword.'%')
                    ->orWhere('address', 'like', '%'.$keyword.'%')
                    ->orWhere('unit_name', 'like', '%'.$keyword.'%')
                    ->orWhere('open_time', 'like', '%'.$keyword.'%')
                    ->orWhere('reservation_notice', 'like', '%'.$keyword.'%')
                    ->orWhere('ticket_content', 'like', '%'.$keyword.'%')
                    ->orWhere('booking_method', 'like', '%'.$keyword.'%')
                    ->orWhere('visit_form', 'like', '%'.$keyword.'%')
                    ->orWhere('consultation_hours', 'like', '%'.$keyword.'%');
            });
        }

        if ($district !== '') {
            $query->where('district', $district);
        }
        if ($venueType !== '') {
            $query->where(function ($q) use ($venueType) {
                $q->where('venue_type', $venueType)
                    ->orWhereJsonContains('venue_types', $venueType);
            });
        }
        if ($ticketType !== '') {
            $query->where('ticket_type', $ticketType);
        }
        if ($bookingMode !== '') {
            $query->where('booking_mode', $bookingMode);
        }
        if ($openMode !== '') {
            $query->where('open_mode', $openMode);
        }
        if ($appointmentType !== '') {
            $query->where('appointment_type', $appointmentType);
        }
        if ($bookingMethodFilled === '1' || $bookingMethodFilled === 1 || $bookingMethodFilled === true) {
            $query->whereNotNull('booking_method')
                ->where('booking_method', '!=', '');
        } elseif ($bookingMethodFilled === '0' || $bookingMethodFilled === 0 || $bookingMethodFilled === false) {
            $query->where(function ($q) {
                $q->whereNull('booking_method')
                    ->orWhere('booking_method', '');
            });
        }

        if ($isActive !== null && $isActive !== '') {
            $query->where('is_active', (int) $isActive === 1);
        }

        if ($isIncludedInStats !== null && $isIncludedInStats !== '') {
            $isIncluded = in_array($isIncludedInStats, [1, '1', true, 'true'], true);
            $query->where('is_included_in_stats', $isIncluded);
        }

        if ($auditStatus !== '') {
            $query->where('audit_status', $auditStatus);
        }

        $venues = $query->orderBy('venues.sort')->orderByDesc('venues.id')->get();

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

    public function update(Request $request, int $id): JsonResponse
    {
        $venue = Venue::query()->findOrFail($id);
        $this->ensureVenuePermission($request, $venue->id);

        $user = $request->user();

        $data = $request->validate([
            'name' => ['sometimes', 'string', 'max:120'],
            'venue_type' => ['nullable', 'string', 'max:80'],
            'venue_types' => ['nullable', 'array'],
            'venue_types.*' => ['string', 'max:80'],
            'unit_name' => ['nullable', 'string', 'max:120'],
            'district' => ['nullable', 'string', 'max:80'],
            'ticket_type' => ['nullable', 'string', 'max:80'],
            'appointment_type' => ['nullable', 'string', 'max:40'],
            'booking_mode' => ['nullable', 'string', 'max:50', Rule::in(['team_only', 'all_required', 'team_required'])],
            'open_mode' => ['nullable', 'string', 'max:40', Rule::in(['fulltime', 'scheduled', 'appointment'])],
            'open_time' => ['nullable', 'string', 'max:65535'],
            'reservation_notice' => ['nullable', 'string'],
            'ticket_content' => ['nullable', 'string'],
            'booking_method' => ['nullable', 'string'],
            'visit_form' => ['nullable', 'string'],
            'consultation_hours' => ['nullable', 'string'],
            'booking_qr_media' => ['nullable', 'array', 'max:20'],
            'booking_qr_media.*.type' => ['required_with:booking_qr_media', 'in:image'],
            'booking_qr_media.*.url' => ['required_with:booking_qr_media', 'string', 'max:255'],
            'address' => ['nullable', 'string', 'max:255'],
            'contact_phone' => ['nullable', 'string', 'max:255'],
            'lat' => ['nullable', 'numeric'],
            'lng' => ['nullable', 'numeric'],
            'cover_image' => ['nullable', 'string', 'max:255'],
            'gallery_media' => ['nullable', 'array'],
            'gallery_media.*.type' => ['required_with:gallery_media', 'in:image,video'],
            'gallery_media.*.url' => ['required_with:gallery_media', 'string', 'max:255'],
            'detail_html' => ['nullable', 'string'],
            'live_people_count' => ['nullable', 'integer', 'min:0'],
            'sort' => ['nullable', 'integer', 'min:0'],
            'is_active' => ['boolean'],
            'is_included_in_stats' => ['boolean'],
        ]);

        if (! $user->isSuperAdmin()) {
            unset($data['sort']);
            if ($venue->audit_status === Venue::AUDIT_APPROVED) {
                $venue->last_approved_snapshot = $venue->buildAuditSnapshot();
            }
            $data['audit_status'] = Venue::AUDIT_PENDING;
            $data['audit_remark'] = null;
        } else {
            $data['audit_status'] = Venue::AUDIT_APPROVED;
            $data['audit_remark'] = null;
            $data['last_approved_snapshot'] = null;
        }

        $venue->fill($data)->save();

        return response()->json($venue->fresh());
    }

    public function approve(Request $request, int $id): JsonResponse
    {
        abort_unless($request->user()?->isSuperAdmin(), 403, '仅超级管理员可审核');

        $venue = Venue::query()->findOrFail($id);
        $venue->audit_status = Venue::AUDIT_APPROVED;
        $venue->audit_remark = null;
        $venue->last_approved_snapshot = null;
        $venue->save();

        return response()->json($venue->fresh());
    }

    public function reject(Request $request, int $id): JsonResponse
    {
        abort_unless($request->user()?->isSuperAdmin(), 403, '仅超级管理员可审核');

        $data = $request->validate([
            'remark' => ['nullable', 'string', 'max:2000'],
        ]);

        $venue = Venue::query()->findOrFail($id);
        $venue->audit_status = Venue::AUDIT_REJECTED;
        $venue->audit_remark = $data['remark'] ?? null;
        $venue->save();

        return response()->json($venue->fresh());
    }

    /**
     * 仅超级管理员。数据库外键会级联删除该场馆下的活动、预约关联等；并从研学线路的 venue_ids 中移除该馆。
     */
    public function destroy(Request $request, int $id): JsonResponse
    {
        abort_unless($request->user()?->isSuperAdmin(), 403, '仅超级管理员可删除场馆');

        $venue = Venue::query()->findOrFail($id);

        DB::transaction(function () use ($venue) {
            $vid = (int) $venue->id;
            StudyTour::query()->orderBy('id')->chunk(50, function ($tours) use ($vid) {
                foreach ($tours as $tour) {
                    $ids = $tour->venue_ids;
                    if (! is_array($ids) || $ids === []) {
                        continue;
                    }
                    $new = array_values(array_filter($ids, fn ($x) => (int) $x !== $vid));
                    if (count($new) !== count($ids)) {
                        $tour->venue_ids = $new;
                        $tour->save();
                    }
                }
            });
            $venue->delete();
        });

        return response()->json(['message' => '删除成功']);
    }

    private function ensureVenuePermission(Request $request, int $venueId): void
    {
        $user = $request->user();
        if ($user->isSuperAdmin()) {
            return;
        }

        $allowed = $user->venues()->where('venues.id', $venueId)->exists();
        abort_unless($allowed, 403, '仅可操作已绑定场馆');
    }
}