<?php

namespace App\Models;

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

class Plan extends Model
{
    use HasFactory;

    protected $fillable = [
        'name',
        'slug',
        'description',
        'price',
        'currency',
        'billing_period',
        'trial_days',
        'features',
        'limits',
        'is_active',
        'is_featured',
        'is_free',
        'sort_order',
        'paypal_plan_id',
    ];

    protected $casts = [
        'price' => 'decimal:2',
        'features' => 'array',
        'limits' => 'array',
        'is_active' => 'boolean',
        'is_featured' => 'boolean',
        'is_free' => 'boolean',
        'trial_days' => 'integer',
        'sort_order' => 'integer',
    ];

    // ==================== RELATIONSHIPS ====================

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

    // ==================== SCOPES ====================

    public function scopeActive($query)
    {
        return $query->where('is_active', true);
    }

    public function scopeOrdered($query)
    {
        return $query->orderBy('sort_order')->orderBy('price');
    }

    public function scopeFree($query)
    {
        return $query->where('billing_period', 'free');
    }

    public function scopePaid($query)
    {
        return $query->where('billing_period', '!=', 'free');
    }

    // ==================== ACCESSORS ====================

    public function getIsFreeAttribute(): bool
    {
        return $this->billing_period === 'free' || $this->price == 0;
    }

    public function getHasTrialAttribute(): bool
    {
        return $this->trial_days > 0;
    }

    public function getFormattedPriceAttribute(): string
    {
        if ($this->is_free) {
            return 'Gratis';
        }

        $symbols = [
            'EUR' => '€',
            'USD' => '$',
            'BRL' => 'R$',
        ];

        $symbol = $symbols[$this->currency] ?? $this->currency;
        $period = match ($this->billing_period) {
            'monthly' => '/mes',
            'annual' => '/año',
            'lifetime' => ' (único)',
            default => '',
        };

        return $symbol . number_format($this->price, 2, ',', '.') . $period;
    }

    public function getMonthlyPriceAttribute(): float
    {
        if ($this->billing_period === 'annual') {
            return round($this->price / 12, 2);
        }
        return $this->price;
    }

    public function getSavingsPercentAttribute(): ?int
    {
        if ($this->billing_period !== 'annual') {
            return null;
        }

        // Find monthly equivalent
        $monthlyPlan = static::where('billing_period', 'monthly')
            ->where('is_active', true)
            ->where('price', '>', 0)
            ->first();

        if (!$monthlyPlan) {
            return null;
        }

        $annualEquivalent = $monthlyPlan->price * 12;
        $savings = (($annualEquivalent - $this->price) / $annualEquivalent) * 100;

        return (int) round($savings);
    }

    // ==================== METHODS ====================

    public function hasFeature(string $feature): bool
    {
        return in_array($feature, $this->features ?? []);
    }

    public function getLimit(string $key, $default = null)
    {
        return $this->limits[$key] ?? $default;
    }

    /**
     * Get the default free plan
     */
    public static function getFreePlan(): ?self
    {
        return static::where('slug', 'free')->first();
    }

    /**
     * Get plans for pricing page
     */
    public static function getForPricing(): \Illuminate\Database\Eloquent\Collection
    {
        return static::active()->ordered()->get();
    }
}