<?php

namespace App\Integrations\Whmcs\Support;

use Illuminate\Console\Command;
use Illuminate\Container\Attributes\Singleton;

#[Singleton]
class SyncReport
{
    /** @var array<int, array{entity: string, ref: string, whmcs_id: string, issue: string, detail: string}> */
    private array $notes = [];

    private bool $batch = false;

    public function note(string $entity, string $ref, int|string $whmcsId, string $issue, string $detail): void
    {
        $this->notes[] = ['entity' => $entity, 'ref' => $ref, 'whmcs_id' => (string) $whmcsId, 'issue' => $issue, 'detail' => $detail];
    }

    public function beginBatch(): void
    {
        $this->batch = true;
    }

    public function finishBatch(Command $command): void
    {
        $this->batch = false;
        $this->finish($command);
    }

    public function finish(Command $command): void
    {
        if ($this->batch || $this->notes === []) {
            return;
        }

        $summary = [];
        foreach ($this->notes as $note) {
            $key = $note['entity'] . ' / ' . $note['issue'];
            $summary[$key] = ($summary[$key] ?? 0) + 1;
        }
        ksort($summary);

        $command->newLine();
        $command->warn('Ghi chú đồng bộ (' . count($this->notes) . ' mục):');
        $command->table(['Loại / vấn đề', 'Số lượng'], array_map(fn ($key, $count) => [$key, $count], array_keys($summary), $summary));
        $command->info('Chi tiết: ' . $this->writeCsv());

        $this->notes = [];
    }

    private function writeCsv(): string
    {
        $path = storage_path('logs/whmcs-sync-report-' . now()->format('Ymd-His-u') . '.csv');
        $handle = fopen($path, 'w');
        fwrite($handle, "\xEF\xBB\xBF");
        fputcsv($handle, ['entity', 'ref', 'whmcs_id', 'issue', 'detail']);
        foreach ($this->notes as $note) {
            fputcsv($handle, $note);
        }
        fclose($handle);

        return $path;
    }
}