<?php

namespace App\Observers;

use App\Models\RepairOrder;
use App\Models\Vehicle;
use App\Models\Part;
use App\Models\MaintenanceSchedule;
use Carbon\Carbon;
use Illuminate\Support\Str;

class RepairOrderObserver
{
    /**
     * Handle the RepairOrder "creating" event.
     */
    public function creating(RepairOrder $repairOrder): void
    {
        // Generate unique order number if not provided
        if (empty($repairOrder->order_number)) {
            $prefix = 'RO-' . date('Ymd');
            $latest = RepairOrder::where('order_number', 'like', $prefix . '%')
                ->orderBy('order_number', 'desc')
                ->first();

            $number = 1;
            if ($latest) {
                $parts = explode('-', $latest->order_number);
                $number = intval(end($parts)) + 1;
            }

            $repairOrder->order_number = $prefix . '-' . str_pad($number, 4, '0', STR_PAD_LEFT);
        }

        // Set reported date if not provided
        if (empty($repairOrder->reported_at)) {
            $repairOrder->reported_at = Carbon::now();
        }
    }

    /**
     * Handle the RepairOrder "created" event.
     */
    public function created(RepairOrder $repairOrder)
    {
        // Update vehicle status when a repair is created
        $vehicle = Vehicle::find($repairOrder->vehicle_id);
        if ($vehicle) {
            $vehicle->status = 'in_repair';
            $vehicle->save();
        }
    }

    /**
     * Handle the RepairOrder "updated" event.
     */
    public function updated(RepairOrder $repairOrder)
    {
        // If status changed to completed, update the vehicle
        if ($repairOrder->status === 'completed' && $repairOrder->getOriginal('status') !== 'completed') {
            $vehicle = Vehicle::find($repairOrder->vehicle_id);
            if ($vehicle) {
                $vehicle->status = 'active';
                $vehicle->save();
            }
        }

        // If status changed to in_progress, set started_at
        if ($repairOrder->status === 'in_progress' && $repairOrder->getOriginal('status') !== 'in_progress' && !$repairOrder->started_at) {
            $repairOrder->started_at = Carbon::now();
            $repairOrder->saveQuietly(); // Prevent recursion
        }

        // Recalculate costs when parts or labor changes
        if ($repairOrder->isDirty(['labor_hours', 'parts_cost'])) {
            $repairOrder->calculateCosts();
        }
    }
}