<?php

namespace App\Console\Commands;

use App\Models\User;
use App\Models\Venue;
use App\Support\VenueAdminCredentials;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

class BatchCreateVenueAdminAccountsCommand extends Command
{
    protected $signature = 'venues:create-admin-accounts
        {--output= : 导出 xlsx 绝对或相对路径（默认 storage/app/exports/venue_admins_时间戳.xlsx）}
        {--dry-run : 仅生成 Excel，不向 users / user_venue 写入（预览或离线存档）}';

    protected $description = '为每个场馆创建一个场馆管理员账号（姓名=馆名，用户名=拼音首字母缩写，密码按规则），并绑定该场馆；导出含明文密码的 Excel';

    public function handle(): int
    {
        $venues = Venue::query()->orderBy('id')->get(['id', 'name']);
        if ($venues->isEmpty()) {
            $this->warn('数据库中暂无场馆。');

            return self::FAILURE;
        }

        $this->info("将处理 {$venues->count()} 个场馆。");

        $rows = [];
        $reservedNames = User::query()->pluck('username')->all();
        $reservedSet = array_fill_keys($reservedNames, true);
        $batchUsed = [];

        foreach ($venues as $venue) {
            $name = (string) $venue->name;
            $base = VenueAdminCredentials::acronymFromVenueName($name);
            $plainPassword = VenueAdminCredentials::passwordFromAcronym($base);

            $username = $base;
            $suffix = 2;
            while (isset($reservedSet[$username]) || isset($batchUsed[$username])) {
                $username = $base.$suffix;
                $suffix++;
            }
            $batchUsed[$username] = true;

            $rows[] = [
                'venue_id' => $venue->id,
                'name' => $name,
                'username' => $username,
                'password_plain' => $plainPassword,
                'role' => '场馆管理员',
                'venue_name' => $name,
            ];
        }

        $defaultDir = storage_path('app/exports');
        if (! is_dir($defaultDir)) {
            mkdir($defaultDir, 0755, true);
        }

        $outPath = $this->option('output');
        if (! $outPath) {
            $outPath = $defaultDir.'/venue_admins_'.now()->format('Ymd_His').'.xlsx';
        } elseif (! str_starts_with((string) $outPath, '/')) {
            $outPath = base_path($outPath);
        }

        $dryRun = (bool) $this->option('dry-run');

        if ($dryRun) {
            $this->warn('当前为 --dry-run：只生成 Excel，不会写入 users / user_venue。去掉 --dry-run 才会入库。');
        } else {
            $this->info('即将写入数据库（users、user_venue），随后生成 Excel…');
            DB::transaction(function () use ($rows) {
                foreach ($rows as $row) {
                    $user = User::updateOrCreate(
                        ['username' => $row['username']],
                        [
                            'name' => $row['name'],
                            'email' => null,
                            'password' => $row['password_plain'],
                            'role' => 'venue_admin',
                            'is_active' => true,
                        ]
                    );

                    $user->venues()->sync([$row['venue_id']]);
                }
            });
            $this->info('数据库写入完成：已创建/更新 '.count($rows).' 个场馆管理员并完成场馆绑定。');
        }

        $this->writeXlsx($outPath, $rows);
        $this->info("Excel 已生成：{$outPath}");

        if ($dryRun) {
            $this->warn('本次未写入数据库。若需要入库请执行：php artisan venues:create-admin-accounts（不要带 --dry-run）');

            return self::SUCCESS;
        }

        return self::SUCCESS;
    }

    /**
     * @param  array<int, array{venue_id:int, name:string, username:string, password_plain:string, role:string, venue_name:string}>  $rows
     */
    private function writeXlsx(string $path, array $rows): void
    {
        $sheetRows = [
            ['场馆ID', '姓名', '用户名', '密码（明文）', '角色', '绑定场馆'],
        ];
        foreach ($rows as $r) {
            $sheetRows[] = [
                $r['venue_id'],
                $r['name'],
                $r['username'],
                $r['password_plain'],
                $r['role'],
                $r['venue_name'],
            ];
        }

        $spreadsheet = new Spreadsheet;
        $sheet = $spreadsheet->getActiveSheet();
        $sheet->setTitle('场馆管理员账号');
        $sheet->fromArray($sheetRows, null, 'A1');

        $writer = new Xlsx($spreadsheet);
        $writer->save($path);
    }
}