<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class BudgetItem extends Model
{
    use HasFactory;

    protected $fillable = [
        'budget_id',
        'chart_of_account_id',
        'budgeted_amount',
        'actual_amount',
        'notes',
    ];

    protected $casts = [
        'budgeted_amount' => 'decimal:2',
        'actual_amount' => 'decimal:2',
    ];

    // Relationships

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

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

    public function transactions(): HasMany
    {
        return $this->hasMany(Transaction::class);
    }

    // Helper methods

    public function getVarianceAttribute(): float
    {
        return $this->actual_amount - $this->budgeted_amount;
    }

    public function getVariancePercentageAttribute(): float
    {
        if ($this->budgeted_amount == 0) {
            return 0;
        }
        return ($this->variance / $this->budgeted_amount) * 100;
    }

    public function getRemainingBudgetAttribute(): float
    {
        return $this->budgeted_amount - $this->actual_amount;
    }

    public function isOverBudget(): bool
    {
        return $this->actual_amount > $this->budgeted_amount;
    }

    public function getUtilizationPercentageAttribute(): float
    {
        if ($this->budgeted_amount == 0) {
            return 0;
        }
        return ($this->actual_amount / $this->budgeted_amount) * 100;
    }
}