<?php

namespace App\Console\Commands;

use App\Models\AiEditRequest;
use App\Models\AiUsageLedger;
use Illuminate\Console\Command;
use Illuminate\Database\Eloquent\Builder;

class AiEditsPruneCommand extends Command
{
    protected $signature = 'ai-edits:prune
        {--request-days= : Override AI request retention days}
        {--ledger-days= : Override usage ledger retention days}
        {--pretend : Report counts without deleting data}';

    protected $description = 'Prune stale AI edit requests and usage ledgers based on retention settings.';

    public function handle(): int
    {
        $requestRetentionDays = max(1, (int) ($this->option('request-days') ?: config('ai-editing.retention.request_days', 90)));
        $ledgerRetentionDays = max(1, (int) ($this->option('ledger-days') ?: config('ai-editing.retention.usage_ledger_days', 365)));
        $pretend = (bool) $this->option('pretend');

        $requestCutoff = now()->subDays($requestRetentionDays);
        $ledgerCutoff = now()->subDays($ledgerRetentionDays);

        $requestQuery = AiEditRequest::query()
            ->where(function (Builder $query) use ($requestCutoff): void {
                $query->where(function (Builder $completedQuery) use ($requestCutoff): void {
                    $completedQuery->whereNotNull('completed_at')
                        ->where('completed_at', '<=', $requestCutoff);
                })->orWhere(function (Builder $expiredQuery): void {
                    $expiredQuery->whereNotNull('expires_at')
                        ->where('expires_at', '<=', now());
                });
            });
        $ledgerQuery = AiUsageLedger::query()
            ->where('recorded_at', '<=', $ledgerCutoff);

        $requestCount = (clone $requestQuery)->count();
        $ledgerCount = (clone $ledgerQuery)->count();

        $this->line(sprintf(
            'AI prune candidates -> requests: %d (<= %s), ledgers: %d (<= %s)',
            $requestCount,
            $requestCutoff->toDateString(),
            $ledgerCount,
            $ledgerCutoff->toDateString()
        ));

        if ($pretend) {
            $this->info('Pretend mode enabled. No records were deleted.');

            return self::SUCCESS;
        }

        $deletedRequests = $requestQuery->delete();
        $deletedLedgers = $ledgerQuery->delete();

        $this->info(sprintf(
            'Pruned AI data -> requests: %d, ledgers: %d.',
            $deletedRequests,
            $deletedLedgers
        ));

        return self::SUCCESS;
    }
}