<?php

namespace App\Models;

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

class PlanFeatureLimit extends Model
{
    use HasFactory;

    protected $fillable = [
        'plan_id',
        'plan_feature_id',
        'limit_value',
        'is_enabled',
        'limit_type',
        'metadata',
        'applies_during_trial',
        'trial_limit_value',
    ];

    protected $casts = [
        'limit_value' => 'decimal:2',
        'trial_limit_value' => 'decimal:2',
        'is_enabled' => 'boolean',
        'applies_during_trial' => 'boolean',
        'metadata' => 'array',
    ];

    /**
     * Limit types
     */
    const LIMIT_MONTHLY = 'monthly';

    const LIMIT_DAILY = 'daily';

    const LIMIT_TOTAL = 'total';

    /**
     * Get the plan that owns this feature limit
     */
    public function plan(): BelongsTo
    {
        return $this->belongsTo(Plan::class);
    }

    /**
     * Get the feature that this limit applies to
     */
    public function planFeature(): BelongsTo
    {
        return $this->belongsTo(PlanFeature::class);
    }

    /**
     * Scope: Enabled limits
     */
    public function scopeEnabled($query)
    {
        return $query->where('is_enabled', true);
    }

    /**
     * Scope: By limit type
     */
    public function scopeByType($query, string $type)
    {
        return $query->where('limit_type', $type);
    }

    /**
     * Check if feature is enabled for this plan
     */
    public function isEnabled(): bool
    {
        return $this->is_enabled;
    }

    /**
     * Get the effective limit value (considering trial status)
     */
    public function getEffectiveLimit(bool $isOnTrial = false): ?float
    {
        if ($isOnTrial && $this->applies_during_trial && $this->trial_limit_value !== null) {
            return (float) $this->trial_limit_value;
        }

        return $this->limit_value ? (float) $this->limit_value : null;
    }

    /**
     * Check if user can use this feature within limits
     */
    public function canUseFeature(float $currentUsage = 0, bool $isOnTrial = false): bool
    {
        if (! $this->isEnabled()) {
            return false;
        }

        $limit = $this->getEffectiveLimit($isOnTrial);

        // If limit is null, feature is unlimited
        if ($limit === null) {
            return true;
        }

        return $currentUsage < $limit;
    }

    /**
     * Get remaining usage allowance
     */
    public function getRemainingUsage(float $currentUsage = 0, bool $isOnTrial = false): float
    {
        $limit = $this->getEffectiveLimit($isOnTrial);

        if ($limit === null) {
            return INF;
        }

        return max(0, $limit - $currentUsage);
    }

    /**
     * Get percentage of limit used
     */
    public function getUsagePercentage(float $currentUsage = 0, bool $isOnTrial = false): float
    {
        $limit = $this->getEffectiveLimit($isOnTrial);

        if ($limit === null || $limit == 0) {
            return 0;
        }

        return min(100, ($currentUsage / $limit) * 100);
    }
}