<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Carbon\Carbon;

class RetributionCalculation extends Model
{
    protected $fillable = [
        'calculation_id',
        'building_type_id',
        'floor_number',
        'building_area',
        'retribution_amount',
        'calculation_detail',
        'calculated_at'
    ];

    protected $casts = [
        'floor_number' => 'integer',
        'building_area' => 'decimal:2',
        'retribution_amount' => 'decimal:2',
        'calculation_detail' => 'array',
        'calculated_at' => 'datetime'
    ];

    /**
     * Building type relationship
     */
    public function buildingType(): BelongsTo
    {
        return $this->belongsTo(BuildingType::class, 'building_type_id');
    }

    /**
     * Generate unique calculation ID
     */
    public static function generateCalculationId(): string
    {
        return 'RTB' . Carbon::now()->format('ymdHis') . rand(10, 99);
    }

    /**
     * Create new calculation
     */
    public static function createCalculation(
        int $buildingTypeId,
        int $floorNumber,
        float $buildingArea,
        float $retributionAmount,
        array $calculationDetail
    ): self {
        return self::create([
            'calculation_id' => self::generateCalculationId(),
            'building_type_id' => $buildingTypeId,
            'floor_number' => $floorNumber,
            'building_area' => $buildingArea,
            'retribution_amount' => $retributionAmount,
            'calculation_detail' => $calculationDetail,
            'calculated_at' => Carbon::now()
        ]);
    }

    /**
     * Get formatted retribution amount
     */
    public function getFormattedAmount(): string
    {
        return 'Rp ' . number_format($this->retribution_amount, 2, ',', '.');
    }

    /**
     * Get calculation breakdown
     */
    public function getCalculationBreakdown(): array
    {
        return $this->calculation_detail ?? [];
    }
}