<?php

namespace App\Models;

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

class Subscription extends Model
{
    protected $fillable = [
        'user_id',
        'plan_name',
        'plan_type',
        'price',
        'currency',
        'status',
        'device_limit',
        'user_limit',
        'has_reports',
        'has_api_access',
        'has_priority_support',
        'starts_at',
        'ends_at',
        'cancelled_at',
        'payment_provider',
        'external_id',
        'features',
    ];

    protected $casts = [
        'price' => 'decimal:2',
        'has_reports' => 'boolean',
        'has_api_access' => 'boolean',
        'has_priority_support' => 'boolean',
        'starts_at' => 'datetime',
        'ends_at' => 'datetime',
        'cancelled_at' => 'datetime',
        'features' => 'array',
    ];

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

    /**
     * Check if subscription is active
     */
    public function isActive(): bool
    {
        if ($this->status !== 'active') {
            return false;
        }

        if ($this->ends_at && $this->ends_at->isPast()) {
            return false;
        }

        return $this->starts_at->isPast();
    }

    /**
     * Check if subscription is expired
     */
    public function isExpired(): bool
    {
        return $this->ends_at && $this->ends_at->isPast();
    }

    /**
     * Check if subscription is cancelled
     */
    public function isCancelled(): bool
    {
        return $this->status === 'cancelled' || $this->cancelled_at !== null;
    }

    /**
     * Get days until expiry
     */
    public function daysUntilExpiry(): ?int
    {
        if (!$this->ends_at) {
            return null;
        }

        return max(0, now()->diffInDays($this->ends_at, false));
    }

    /**
     * Check if user has exceeded device limit
     */
    public function hasExceededDeviceLimit(): bool
    {
        return $this->user->devices()->count() > $this->device_limit;
    }

    /**
     * Check if user has a specific feature
     */
    public function hasFeature(string $feature): bool
    {
        return in_array($feature, $this->features ?? []);
    }

    /**
     * Cancel subscription
     */
    public function cancel(): void
    {
        $this->update([
            'status' => 'cancelled',
            'cancelled_at' => now(),
        ]);
    }

    /**
     * Renew subscription
     */
    public function renew(Carbon $newEndDate): void
    {
        $this->update([
            'status' => 'active',
            'ends_at' => $newEndDate,
            'cancelled_at' => null,
        ]);
    }
}