<?php

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Models\AudienceRegistration;
use App\Models\Competition;
use App\Models\CompetitionPortalLocale;
use App\Support\BizDateTime;
use App\Support\PortalLocale;
use App\Support\SignupDisplay;
use App\Support\SignupOptionCatalog;
use App\Support\SignupSchemaLayout;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;
use OpenSpout\Common\Entity\Row;
use OpenSpout\Writer\XLSX\Writer;
use Symfony\Component\HttpFoundation\BinaryFileResponse;
use Symfony\Component\HttpFoundation\Response;

class AudienceRegistrationController extends Controller
{
    public function index(Request $request, Competition $competition): JsonResponse
    {
        $filters = $this->validatedFilters($request, $competition);
        $query = $this->buildQuery($competition, $filters);
        $perPage = min((int) ($filters['per_page'] ?? 15), 100);
        $paginator = $query->paginate($perPage);
        $paginator->getCollection()->transform(fn (AudienceRegistration $row) => $this->toArray($row, $competition));

        $payload = $paginator->toArray();
        $competition->loadMissing('audienceFormSchema');
        $payload['schema_list_fields'] = SignupSchemaLayout::adminListFields($competition, 'audience');
        $payload['schema_filter_fields'] = SignupSchemaLayout::adminFilterFields($competition, 'audience');

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

    public function export(Request $request, Competition $competition): BinaryFileResponse
    {
        $filters = $this->validatedFilters($request, $competition);
        $rows = $this->buildQuery($competition, $filters)->get();

        $tmp = tempnam(sys_get_temp_dir(), 'audience_export_');
        if ($tmp === false) {
            abort(Response::HTTP_INTERNAL_SERVER_ERROR, '无法创建导出文件');
        }
        $xlsxPath = $tmp.'.xlsx';
        @unlink($tmp);

        $writer = new Writer;
        $writer->openToFile($xlsxPath);
        $competition->loadMissing('audienceFormSchema');
        $known = ['name', 'phone', 'company', 'job', 'purpose'];
        $extraFields = [];
        $extraHeaders = [];
        foreach (SignupSchemaLayout::adminListFields($competition, 'audience') as $field) {
            if (in_array($field['key'], $known, true)) {
                continue;
            }
            $extraHeaders[] = $field['label'];
            if ($field['type'] === 'select') {
                $extraHeaders[] = $field['label'].'编码';
            }
            $extraFields[] = $field;
        }
        $writer->addRow(Row::fromValues(array_merge([
            '场次',
            '姓名',
            '电话',
            '票号',
            '单位',
            '职务',
            '观赛目的',
            '填报语言',
            '报名时间',
            '核销状态',
            '到场时间',
        ], $extraHeaders)));
        foreach ($rows as $row) {
            $locale = SignupDisplay::audienceLocale((int) $row->user_id, (int) $row->competition_id);
            $cells = [
                $row->session ? SignupDisplay::sessionName($row->session, $locale) : '',
                $row->name,
                $row->phone,
                $row->ticket_code ?? '',
                $row->company ?? '',
                $row->job ?? '',
                SignupDisplay::purposeLabel((string) $row->purpose, $locale),
                SignupDisplay::localeTag($locale),
                $row->registered_at
                    ? $row->registered_at->copy()->timezone(BizDateTime::TIMEZONE)->format('Y-m-d H:i')
                    : '',
                $row->checked_in_at ? '已到场' : '未到场',
                $row->checked_in_at
                    ? $row->checked_in_at->copy()->timezone(BizDateTime::TIMEZONE)->format('Y-m-d H:i')
                    : '',
            ];
            $display = SignupSchemaLayout::audienceDisplayMap($competition, $row);
            foreach ($extraFields as $field) {
                $cells[] = $display[$field['key']] ?? '';
                if ($field['type'] === 'select') {
                    $raw = SignupDisplay::audienceFieldValue($row, $field['key']);
                    $cells[] = is_scalar($raw) ? (string) $raw : '';
                }
            }
            $writer->addRow(Row::fromValues($cells));
        }
        $writer->close();

        $filename = '观众报名_'.$competition->slug.'_'.now()->timezone(BizDateTime::TIMEZONE)->format('Ymd_His').'.xlsx';

        return response()->download($xlsxPath, $filename, [
            'Content-Type' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
        ])->deleteFileAfterSend(true);
    }

    /**
     * @return array<string, mixed>
     */
    private function validatedFilters(Request $request, Competition $competition): array
    {
        return array_merge($request->validate([
            'page' => ['sometimes', 'integer', 'min:1'],
            'per_page' => ['sometimes', 'integer', 'min:1', 'max:100'],
            'audience_session_id' => ['sometimes', 'nullable', 'integer', 'min:1'],
            'phone' => ['sometimes', 'nullable', 'string', 'max:20'],
            'purpose' => ['sometimes', 'nullable', 'string', 'max:64'],
            'signup_locale' => ['sometimes', 'nullable', 'string', Rule::in(['', PortalLocale::ZH, PortalLocale::EN])],
            'keyword' => ['sometimes', 'nullable', 'string', 'max:64'],
            'checkin_status' => ['sometimes', 'nullable', 'string', Rule::in(['checked_in', 'not_checked_in', ''])],
        ]), SignupSchemaLayout::extractFilterValues($request, $competition, 'audience'));
    }

    /**
     * @param  array<string, mixed>  $filters
     * @return Builder<AudienceRegistration>
     */
    private function buildQuery(Competition $competition, array $filters): Builder
    {
        $query = AudienceRegistration::query()
            ->with('session')
            ->where('competition_id', $competition->id)
            ->orderByDesc('registered_at')
            ->orderByDesc('id');

        $sessionId = (int) ($filters['audience_session_id'] ?? 0);
        if ($sessionId > 0) {
            $query->where('audience_session_id', $sessionId);
        }

        $phone = trim((string) ($filters['phone'] ?? ''));
        if ($phone !== '') {
            $query->where('phone', 'like', '%'.$phone.'%');
        }

        $purpose = trim((string) ($filters['purpose'] ?? ''));
        if ($purpose !== '') {
            $normalized = SignupOptionCatalog::normalize('purpose', $purpose) ?: $purpose;
            $query->where('purpose', $normalized);
        }

        $signupLocale = trim((string) ($filters['signup_locale'] ?? ''));
        if ($signupLocale !== '') {
            $userIds = CompetitionPortalLocale::query()
                ->where('competition_id', $competition->id)
                ->where('portal', PortalLocale::PORTAL_AUDIENCE)
                ->where('locale', $signupLocale)
                ->pluck('user_id');
            $query->whereIn('user_id', $userIds);
        }

        $keyword = trim((string) ($filters['keyword'] ?? ''));
        if ($keyword !== '') {
            $query->where(function (Builder $q) use ($keyword) {
                $q->where('name', 'like', '%'.$keyword.'%')
                    ->orWhere('phone', 'like', '%'.$keyword.'%')
                    ->orWhere('company', 'like', '%'.$keyword.'%')
                    ->orWhere('ticket_code', 'like', '%'.$keyword.'%');
            });
        }

        $checkinStatus = trim((string) ($filters['checkin_status'] ?? ''));
        if ($checkinStatus === 'checked_in') {
            $query->whereNotNull('checked_in_at');
        } elseif ($checkinStatus === 'not_checked_in') {
            $query->whereNull('checked_in_at');
        }

        SignupSchemaLayout::applyFilters($query, $competition, $filters, 'audience');

        return $query;
    }

    /**
     * @return array<string, mixed>
     */
    private function toArray(AudienceRegistration $row, ?Competition $competition = null): array
    {
        $locale = SignupDisplay::audienceLocale((int) $row->user_id, (int) $row->competition_id);
        $competition ??= $row->competition;

        return [
            'id' => $row->id,
            'competition_id' => $row->competition_id,
            'audience_session_id' => $row->audience_session_id,
            'session_name' => $row->session ? SignupDisplay::sessionName($row->session, $locale) : $row->session?->name,
            'session_code' => $row->session?->code,
            'name' => $row->name,
            'phone' => $row->phone,
            'company' => $row->company,
            'job' => $row->job,
            'purpose' => $row->purpose,
            'purpose_label' => SignupDisplay::purposeLabel((string) $row->purpose, $locale),
            'signup_locale' => $locale,
            'signup_locale_label' => SignupDisplay::localeTag($locale),
            'ticket_code' => $row->ticket_code,
            'registered_at' => BizDateTime::toIso8601($row->registered_at),
            'checked_in_at' => BizDateTime::toIso8601($row->checked_in_at),
            'checked_in' => $row->checked_in_at !== null,
            'schema_display' => $competition
                ? SignupSchemaLayout::audienceDisplayMap($competition, $row)
                : [],
        ];
    }
}