<?php

namespace App\Console\Commands;

use App\Services\Inventory\InventoryMovementService;
use Illuminate\Console\Command;

class InventoryReconcile extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'inventory:reconcile
                            {--school-year= : The school year to reconcile (e.g., 2025-2026). Defaults to current.}
                            {--fix : Automatically fix discrepancies by creating adjustment movements.}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Reconcile inventory item quantities against movement ledger totals';

    /**
     * Execute the console command.
     */
    public function handle(InventoryMovementService $movementService)
    {
        $schoolYear = $this->option('school-year');
        $autoFix = $this->option('fix');

        $result = $movementService->reconcile($schoolYear);

        $this->info("School Year: {$result['school_year']}");
        $this->info("Total Items: {$result['total_items']}");
        $this->info("Discrepancies: {$result['discrepancies_count']}");

        if (empty($result['discrepancies'])) {
            $this->info('✅ All item quantities match movement ledger.');

            return Command::SUCCESS;
        }

        $this->table(
            ['ID', 'Name', 'Stored Qty', 'Movement Sum', 'Variance'],
            collect($result['discrepancies'])->map(fn ($d) => [
                $d['id'],
                $d['name'],
                $d['stored_quantity'],
                $d['movement_sum'],
                $d['variance'],
            ])->toArray()
        );

        if ($autoFix) {
            $this->info('Fixing discrepancies...');
            foreach ($result['discrepancies'] as $d) {
                if ($d['variance'] !== 0) {
                    $movementService->recordMovement(
                        itemId: $d['id'],
                        qtyChange: -$d['variance'],
                        type: 'adjust',
                        reason: 'Auto-reconciliation: stored qty differed from movement sum',
                        note: 'Reconciled from '.$d['stored_quantity'].' to '.$d['movement_sum'],
                        performedBy: null
                    );
                    $this->line("  Fixed item #{$d['id']} ({$d['name']}): variance was {$d['variance']}");
                }
            }
            $this->info('✅ Fix applied.');
        } else {
            $this->warn('Run with --fix to automatically correct discrepancies.');
        }

        return Command::SUCCESS;
    }
}