<?php namespace App\Models;

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

class Client extends Model
{
    protected $fillable = [
        'name',
        'client_number',
        'email',
        'phone',
        'address',
        'rfc',
        'razon_social',
        'regimen_fiscal',
        'cp_fiscal',
        'uso_cfdi',
        'tier_id',
        'total_purchases',
        'total_transactions',
        'lifetime_returns',
        'last_purchase_at',
    ];

    protected $casts = [
        'total_purchases' => 'decimal:2',
        'total_transactions' => 'integer',
        'lifetime_returns' => 'decimal:2',
        'last_purchase_at' => 'datetime',
    ];

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

    /**
     * Nivel o rango del cliente
     */
    public function tier(): BelongsTo
    {
        return $this->belongsTo(ClientTier::class, 'tier_id');
    }

    /**
     * Historial de cambios de nivel del cliente
     */
    public function tierHistory(): HasMany
    {
        return $this->hasMany(ClientTierHistory::class)->orderBy('changed_at', 'desc');
    }

    /**
     * Descuento aplicable según el nivel del cliente
     */
    public function getDiscountPercentageAttribute(): float
    {
        return $this->tier?->discount_percentage ?? 0;
    }

    /**
     * Compras netas del cliente (total compras - devoluciones)
     */
    public function getNetPurchasesAttribute(): float
    {
        return $this->total_purchases - $this->lifetime_returns;
    }
}