<?php

namespace Modules\InventoryManagement\Services;

use App\TransactionSellLine;
use Illuminate\Support\Facades\DB;
use Modules\InventoryManagement\Models\WmsWave;
use Modules\InventoryManagement\Models\WmsWaveLine;

class WmsWaveService
{
    public function createWave(int $businessId, int $locationId, array $sellLineIds = []): WmsWave
    {
        return DB::transaction(function () use ($businessId, $locationId, $sellLineIds) {
            $count = WmsWave::forBusiness($businessId)->count() + 1;
            $wave = WmsWave::create([
                'business_id' => $businessId,
                'location_id' => $locationId,
                'wave_no' => 'WAVE-'.str_pad((string) $count, 5, '0', STR_PAD_LEFT),
                'status' => 'planned',
                'pick_strategy' => 'wave',
            ]);

            $lines = TransactionSellLine::query()
                ->whereIn('id', $sellLineIds)
                ->get();

            foreach ($lines as $line) {
                WmsWaveLine::create([
                    'wave_id' => $wave->id,
                    'variation_id' => $line->variation_id,
                    'product_id' => $line->product_id,
                    'quantity' => $line->quantity,
                    'sell_line_id' => $line->id,
                    'status' => 'pending',
                ]);
            }

            return $wave->load('lines');
        });
    }

    public function releaseWave(WmsWave $wave): WmsWave
    {
        $wave->update(['status' => 'released', 'released_at' => now()]);

        return $wave;
    }

    public function recordPick(WmsWaveLine $line, float $qty): WmsWaveLine
    {
        $line->picked_quantity = min($line->quantity, $line->picked_quantity + $qty);
        $line->status = $line->picked_quantity >= $line->quantity ? 'picked' : 'pending';
        $line->save();

        $pending = WmsWaveLine::where('wave_id', $line->wave_id)->where('status', '!=', 'picked')->count();
        if ($pending === 0) {
            $line->wave->update(['status' => 'completed', 'completed_at' => now()]);
        } elseif ($line->wave->status === 'released') {
            $line->wave->update(['status' => 'picking']);
        }

        return $line;
    }
}