<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Contracts\Auth\Authenticatable;
use Illuminate\Auth\Authenticatable as AuthenticatableTrait;

class GatewayUser extends Model implements Authenticatable
{
    use HasFactory, AuthenticatableTrait;

    protected $table = 'gateway_users';
    protected $primaryKey = 'user_id';
    public $incrementing = false;
    protected $keyType = 'string';

    protected $fillable = [
        'user_id',
        'alias',
        'monthly_budget_limit',
        'current_month_spending',
        'budget_alert_threshold',
        'rate_limit_per_hour',
        'blocked',
        'metadata',
    ];

    protected $casts = [
        'metadata' => 'array',
        'blocked' => 'boolean',
        'monthly_budget_limit' => 'decimal:2',
        'current_month_spending' => 'decimal:2',
        'created_at' => 'datetime',
        'updated_at' => 'datetime',
    ];

    // Relationships
    public function apiKeys()
    {
        return $this->hasMany(ApiKey::class, 'gateway_user_id', 'user_id');
    }

    public function credentials()
    {
        return $this->hasMany(GatewayUserCredential::class, 'user_id', 'user_id');
    }

    public function usageLogs()
    {
        return $this->hasMany(UsageLog::class, 'gateway_user_id', 'user_id');
    }

    public function llmRequests()
    {
        return $this->hasMany(LlmRequest::class, 'gateway_user_id', 'user_id');
    }

    // Scopes
    public function scopeActive($query)
    {
        return $query->where('blocked', false);
    }

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

    // Helper methods for budget management
    public function isBlocked(): bool
    {
        return $this->blocked;
    }

    public function hasExceededBudget(): bool
    {
        if (!$this->monthly_budget_limit) {
            return false;
        }
        return $this->current_month_spending >= $this->monthly_budget_limit;
    }

    public function incrementSpending(float $amount): void
    {
        $this->increment('current_month_spending', $amount);
    }

    public function resetMonthlySpending(): void
    {
        $this->update(['current_month_spending' => 0]);
    }

    public function getBudgetUsagePercentage(): ?float
    {
        if (!$this->monthly_budget_limit || $this->monthly_budget_limit == 0) {
            return null;
        }
        return ($this->current_month_spending / $this->monthly_budget_limit) * 100;
    }

    public function shouldSendBudgetAlert(): bool
    {
        if (!$this->budget_alert_threshold || !$this->monthly_budget_limit) {
            return false;
        }
        
        $percentage = $this->getBudgetUsagePercentage();
        return $percentage !== null && $percentage >= $this->budget_alert_threshold;
    }
}