<?php

namespace App\Models\Tenant;

use App\Models\Concerns\BelongsToTenant;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class WorkOrderPart extends Model
{
    use BelongsToTenant;

    protected $table = 'wo_parts';

    public const STATUSES = [
        'needed' => 'Necesară',
        'ordered' => 'Comandată',
        'delivered' => 'Sosită',
        'installed' => 'Montată',
    ];

    protected $fillable = [
        'company_id', 'work_order_id', 'part_id',
        'name', 'article', 'brand',
        'qty', 'unit', 'buy_price', 'sell_price',
        'discount_pct', 'total', 'status', 'notes',
        'requires_approval', 'approved_at', 'approval_token', 'declined_at',
    ];

    protected $casts = [
        'qty' => 'decimal:2',
        'buy_price' => 'decimal:2',
        'sell_price' => 'decimal:2',
        'discount_pct' => 'decimal:2',
        'total' => 'decimal:2',
        'requires_approval' => 'boolean',
        'approved_at' => 'datetime',
        'declined_at' => 'datetime',
    ];

    public function isPendingApproval(): bool
    {
        return $this->requires_approval && $this->approved_at === null && $this->declined_at === null;
    }

    public function workOrder(): BelongsTo
    {
        return $this->belongsTo(WorkOrder::class);
    }

    public function part(): BelongsTo
    {
        return $this->belongsTo(Part::class);
    }

    protected static function booted(): void
    {
        static::saving(function (self $row) {
            $sub = (float) $row->qty * (float) $row->sell_price;
            $disc = (float) $row->discount_pct;
            $row->total = round($sub * (1 - $disc / 100), 2);
            if ($row->requires_approval && empty($row->approval_token)) {
                $row->approval_token = \Illuminate\Support\Str::random(24);
            }
        });

        // Reserve batches as soon as a catalog-linked part line is created.
        // Reservations don't reduce on-hand qty, only block other reservations.
        static::created(function (self $row) {
            if ($row->part_id) {
                try {
                    app(\App\Services\Warehouse\WarehouseService::class)->reserve($row);
                } catch (\App\Services\Warehouse\InsufficientStockException $e) {
                    \Illuminate\Support\Facades\Log::warning('WO part reservation skipped: ' . $e->getMessage());
                }
            }
        });

        // If qty / part link changes, release old reservation and re-reserve.
        static::updated(function (self $row) {
            if ($row->wasChanged(['qty', 'part_id'])) {
                $svc = app(\App\Services\Warehouse\WarehouseService::class);
                $svc->release($row);
                if ($row->part_id) {
                    try {
                        $svc->reserve($row);
                    } catch (\App\Services\Warehouse\InsufficientStockException $e) {
                        \Illuminate\Support\Facades\Log::warning('WO part re-reservation skipped: ' . $e->getMessage());
                    }
                }
            }
        });

        static::deleted(function (self $row) {
            app(\App\Services\Warehouse\WarehouseService::class)->release($row);
        });

        static::saved(fn (self $row) => $row->workOrder?->recalcTotal());
        static::deleted(fn (self $row) => $row->workOrder?->recalcTotal());
    }
}