<?php

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Models\AudienceRegistration;
use App\Models\Competition;
use App\Support\BizDateTime;
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);
        $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));

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

    public function export(Request $request, Competition $competition): BinaryFileResponse
    {
        $filters = $this->validatedFilters($request);
        $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);
        $writer->addRow(Row::fromValues([
            '场次',
            '姓名',
            '电话',
            '单位',
            '职务',
            '观赛目的',
            '报名时间',
            '核销状态',
            '到场时间',
        ]));
        foreach ($rows as $row) {
            $writer->addRow(Row::fromValues([
                $row->session?->name ?? '',
                $row->name,
                $row->phone,
                $row->company ?? '',
                $row->job ?? '',
                $row->purpose,
                $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')
                    : '',
            ]));
        }
        $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): array
    {
        return $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', Rule::in(array_merge(AudienceRegistration::PURPOSES, ['']))],
            'keyword' => ['sometimes', 'nullable', 'string', 'max:64'],
            'checkin_status' => ['sometimes', 'nullable', 'string', Rule::in(['checked_in', 'not_checked_in', ''])],
        ]);
    }

    /**
     * @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 !== '') {
            $query->where('purpose', $purpose);
        }

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

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

        return $query;
    }

    /**
     * @return array<string, mixed>
     */
    private function toArray(AudienceRegistration $row): array
    {
        return [
            'id' => $row->id,
            'competition_id' => $row->competition_id,
            'audience_session_id' => $row->audience_session_id,
            'session_name' => $row->session?->name,
            'session_code' => $row->session?->code,
            'name' => $row->name,
            'phone' => $row->phone,
            'company' => $row->company,
            'job' => $row->job,
            'purpose' => $row->purpose,
            'registered_at' => BizDateTime::toIso8601($row->registered_at),
            'checked_in_at' => BizDateTime::toIso8601($row->checked_in_at),
            'checked_in' => $row->checked_in_at !== null,
        ];
    }
}