645 lines
27 KiB
Python
645 lines
27 KiB
Python
"""
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Usage Tracking Service
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Comprehensive tracking of API usage, costs, and subscription limits.
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"""
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import asyncio
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from typing import Dict, Any, Optional, List, Tuple
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from datetime import datetime, timedelta
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from sqlalchemy.orm import Session
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from loguru import logger
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import json
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from models.subscription_models import (
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APIUsageLog, UsageSummary, APIProvider, UsageAlert,
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UserSubscription, UsageStatus
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)
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from .pricing_service import PricingService
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class UsageTrackingService:
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"""Service for tracking API usage and managing subscription limits."""
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def __init__(self, db: Session):
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self.db = db
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self.pricing_service = PricingService(db)
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# TTL cache (30s) for enforcement results to cut DB chatter
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# key: f"{user_id}:{provider}", value: { 'result': (bool,str,dict), 'expires_at': datetime }
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self._enforce_cache: Dict[str, Dict[str, Any]] = {}
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async def track_api_usage(self, user_id: str, provider: APIProvider,
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endpoint: str, method: str, model_used: str = None,
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tokens_input: int = 0, tokens_output: int = 0,
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response_time: float = 0.0, status_code: int = 200,
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request_size: int = None, response_size: int = None,
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user_agent: str = None, ip_address: str = None,
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error_message: str = None, retry_count: int = 0,
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**kwargs) -> Dict[str, Any]:
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"""Track an API usage event and update billing information."""
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try:
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# Calculate costs
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# Use specific model names instead of generic defaults
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default_models = {
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"gemini": "gemini-2.5-flash", # Use Flash as default (cost-effective)
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"openai": "gpt-4o-mini", # Use Mini as default (cost-effective)
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"anthropic": "claude-3.5-sonnet", # Use Sonnet as default
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"mistral": "openai/gpt-oss-120b:groq" # HuggingFace default model
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}
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# For HuggingFace (stored as MISTRAL), use the actual model name or default
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if provider == APIProvider.MISTRAL:
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# HuggingFace models - try to match the actual model name from model_used
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if model_used:
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model_name = model_used
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else:
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model_name = default_models.get("mistral", "openai/gpt-oss-120b:groq")
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else:
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model_name = model_used or default_models.get(provider.value, f"{provider.value}-default")
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cost_data = self.pricing_service.calculate_api_cost(
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provider=provider,
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model_name=model_name,
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tokens_input=tokens_input,
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tokens_output=tokens_output,
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request_count=1,
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**kwargs
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)
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# Create usage log entry
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billing_period = self.pricing_service.get_current_billing_period(user_id) or datetime.now().strftime("%Y-%m")
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usage_log = APIUsageLog(
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user_id=user_id,
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provider=provider,
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endpoint=endpoint,
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method=method,
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model_used=model_used,
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tokens_input=tokens_input,
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tokens_output=tokens_output,
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tokens_total=(tokens_input or 0) + (tokens_output or 0),
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cost_input=cost_data['cost_input'],
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cost_output=cost_data['cost_output'],
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cost_total=cost_data['cost_total'],
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response_time=response_time,
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status_code=status_code,
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request_size=request_size,
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response_size=response_size,
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user_agent=user_agent,
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ip_address=ip_address,
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error_message=error_message,
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retry_count=retry_count,
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billing_period=billing_period
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)
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self.db.add(usage_log)
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# Update usage summary
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await self._update_usage_summary(
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user_id=user_id,
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provider=provider,
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tokens_used=(tokens_input or 0) + (tokens_output or 0),
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cost=cost_data['cost_total'],
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billing_period=billing_period,
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response_time=response_time,
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is_error=status_code >= 400
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)
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# Check for usage alerts
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await self._check_usage_alerts(user_id, provider, billing_period)
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self.db.commit()
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logger.info(f"Tracked API usage: {user_id} -> {provider.value} -> ${cost_data['cost_total']:.6f}")
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return {
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'usage_logged': True,
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'cost': cost_data['cost_total'],
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'tokens_used': (tokens_input or 0) + (tokens_output or 0),
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'billing_period': billing_period
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}
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except Exception as e:
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logger.error(f"Error tracking API usage: {str(e)}")
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self.db.rollback()
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return {
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'usage_logged': False,
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'error': str(e)
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}
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async def _update_usage_summary(self, user_id: str, provider: APIProvider,
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tokens_used: int, cost: float, billing_period: str,
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response_time: float, is_error: bool):
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"""Update the usage summary for a user."""
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# Get or create usage summary
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summary = self.db.query(UsageSummary).filter(
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UsageSummary.user_id == user_id,
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UsageSummary.billing_period == billing_period
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).first()
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if not summary:
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summary = UsageSummary(
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user_id=user_id,
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billing_period=billing_period
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)
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self.db.add(summary)
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# Update provider-specific counters
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provider_name = provider.value
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current_calls = getattr(summary, f"{provider_name}_calls", 0)
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setattr(summary, f"{provider_name}_calls", current_calls + 1)
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# Update token usage for LLM providers
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if provider in [APIProvider.GEMINI, APIProvider.OPENAI, APIProvider.ANTHROPIC, APIProvider.MISTRAL]:
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current_tokens = getattr(summary, f"{provider_name}_tokens", 0)
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setattr(summary, f"{provider_name}_tokens", current_tokens + tokens_used)
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# Update cost
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current_cost = getattr(summary, f"{provider_name}_cost", 0.0)
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setattr(summary, f"{provider_name}_cost", current_cost + cost)
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# Update totals
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summary.total_calls += 1
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summary.total_tokens += tokens_used
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summary.total_cost += cost
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# Update performance metrics
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if summary.total_calls > 0:
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# Update average response time
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total_response_time = summary.avg_response_time * (summary.total_calls - 1) + response_time
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summary.avg_response_time = total_response_time / summary.total_calls
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# Update error rate
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if is_error:
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error_count = int(summary.error_rate * (summary.total_calls - 1) / 100) + 1
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summary.error_rate = (error_count / summary.total_calls) * 100
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else:
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error_count = int(summary.error_rate * (summary.total_calls - 1) / 100)
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summary.error_rate = (error_count / summary.total_calls) * 100
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# Update usage status based on limits
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await self._update_usage_status(summary)
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summary.updated_at = datetime.utcnow()
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async def _update_usage_status(self, summary: UsageSummary):
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"""Update usage status based on subscription limits."""
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limits = self.pricing_service.get_user_limits(summary.user_id)
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if not limits:
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return
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# Check various limits and determine status
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max_usage_percentage = 0.0
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# Check cost limit
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cost_limit = limits['limits'].get('monthly_cost', 0)
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if cost_limit > 0:
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cost_usage_pct = (summary.total_cost / cost_limit) * 100
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max_usage_percentage = max(max_usage_percentage, cost_usage_pct)
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# Check call limits for each provider
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for provider in APIProvider:
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provider_name = provider.value
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current_calls = getattr(summary, f"{provider_name}_calls", 0)
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call_limit = limits['limits'].get(f"{provider_name}_calls", 0)
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if call_limit > 0:
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call_usage_pct = (current_calls / call_limit) * 100
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max_usage_percentage = max(max_usage_percentage, call_usage_pct)
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# Update status based on highest usage percentage
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if max_usage_percentage >= 100:
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summary.usage_status = UsageStatus.LIMIT_REACHED
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elif max_usage_percentage >= 80:
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summary.usage_status = UsageStatus.WARNING
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else:
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summary.usage_status = UsageStatus.ACTIVE
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async def _check_usage_alerts(self, user_id: str, provider: APIProvider, billing_period: str):
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"""Check if usage alerts should be sent."""
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# Get current usage
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summary = self.db.query(UsageSummary).filter(
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UsageSummary.user_id == user_id,
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UsageSummary.billing_period == billing_period
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).first()
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if not summary:
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return
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# Get user limits
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limits = self.pricing_service.get_user_limits(user_id)
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if not limits:
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return
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# Check for alert thresholds (80%, 90%, 100%)
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thresholds = [80, 90, 100]
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for threshold in thresholds:
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# Check if alert already sent for this threshold
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existing_alert = self.db.query(UsageAlert).filter(
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UsageAlert.user_id == user_id,
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UsageAlert.billing_period == billing_period,
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UsageAlert.threshold_percentage == threshold,
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UsageAlert.provider == provider,
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UsageAlert.is_sent == True
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).first()
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if existing_alert:
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continue
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# Check if threshold is reached
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provider_name = provider.value
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current_calls = getattr(summary, f"{provider_name}_calls", 0)
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call_limit = limits['limits'].get(f"{provider_name}_calls", 0)
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if call_limit > 0:
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usage_percentage = (current_calls / call_limit) * 100
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if usage_percentage >= threshold:
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await self._create_usage_alert(
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user_id=user_id,
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provider=provider,
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threshold=threshold,
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current_usage=current_calls,
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limit=call_limit,
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billing_period=billing_period
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)
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async def _create_usage_alert(self, user_id: str, provider: APIProvider,
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threshold: int, current_usage: int, limit: int,
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billing_period: str):
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"""Create a usage alert."""
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# Determine alert type and severity
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if threshold >= 100:
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alert_type = "limit_reached"
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severity = "error"
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title = f"API Limit Reached - {provider.value.title()}"
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message = f"You have reached your {provider.value} API limit of {limit:,} calls for this billing period."
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elif threshold >= 90:
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alert_type = "usage_warning"
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severity = "warning"
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title = f"API Usage Warning - {provider.value.title()}"
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message = f"You have used {current_usage:,} of {limit:,} {provider.value} API calls ({threshold}% of your limit)."
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else:
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alert_type = "usage_warning"
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severity = "info"
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title = f"API Usage Notice - {provider.value.title()}"
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message = f"You have used {current_usage:,} of {limit:,} {provider.value} API calls ({threshold}% of your limit)."
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alert = UsageAlert(
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user_id=user_id,
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alert_type=alert_type,
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threshold_percentage=threshold,
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provider=provider,
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title=title,
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message=message,
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severity=severity,
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billing_period=billing_period
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)
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self.db.add(alert)
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logger.info(f"Created usage alert for {user_id}: {title}")
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def get_user_usage_stats(self, user_id: str, billing_period: str = None) -> Dict[str, Any]:
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"""Get comprehensive usage statistics for a user."""
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if not billing_period:
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billing_period = self.pricing_service.get_current_billing_period(user_id) or datetime.now().strftime("%Y-%m")
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# Get usage summary
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summary = self.db.query(UsageSummary).filter(
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UsageSummary.user_id == user_id,
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UsageSummary.billing_period == billing_period
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).first()
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# Get user limits
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limits = self.pricing_service.get_user_limits(user_id)
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# Get recent alerts
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alerts = self.db.query(UsageAlert).filter(
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UsageAlert.user_id == user_id,
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UsageAlert.billing_period == billing_period,
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UsageAlert.is_read == False
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).order_by(UsageAlert.created_at.desc()).limit(10).all()
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if not summary:
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# No usage this period - return complete structure with zeros
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provider_breakdown = {}
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usage_percentages = {}
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# Initialize provider breakdown with zeros
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for provider in APIProvider:
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provider_name = provider.value
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provider_breakdown[provider_name] = {
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'calls': 0,
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'tokens': 0,
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'cost': 0.0
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}
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usage_percentages[f"{provider_name}_calls"] = 0
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usage_percentages['cost'] = 0
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return {
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'billing_period': billing_period,
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'usage_status': 'active',
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'total_calls': 0,
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'total_tokens': 0,
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'total_cost': 0.0,
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'avg_response_time': 0.0,
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'error_rate': 0.0,
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'last_updated': datetime.now().isoformat(),
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'limits': limits,
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'provider_breakdown': provider_breakdown,
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'alerts': [],
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'usage_percentages': {}
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}
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# Provider breakdown - calculate costs first, then use for percentages
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# Only include Gemini and HuggingFace (HuggingFace is stored under MISTRAL enum)
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provider_breakdown = {}
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# Gemini
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gemini_calls = getattr(summary, "gemini_calls", 0) or 0
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gemini_tokens = getattr(summary, "gemini_tokens", 0) or 0
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gemini_cost = getattr(summary, "gemini_cost", 0.0) or 0.0
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# If gemini cost is 0 but there are calls, calculate from usage logs
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if gemini_calls > 0 and gemini_cost == 0.0:
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gemini_logs = self.db.query(APIUsageLog).filter(
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APIUsageLog.user_id == user_id,
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APIUsageLog.provider == APIProvider.GEMINI,
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APIUsageLog.billing_period == billing_period
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).all()
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if gemini_logs:
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gemini_cost = sum(float(log.cost_total or 0.0) for log in gemini_logs)
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logger.info(f"[UsageStats] Calculated gemini cost from {len(gemini_logs)} logs: ${gemini_cost:.6f}")
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provider_breakdown['gemini'] = {
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'calls': gemini_calls,
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'tokens': gemini_tokens,
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'cost': gemini_cost
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}
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# HuggingFace (stored as MISTRAL in database)
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mistral_calls = getattr(summary, "mistral_calls", 0) or 0
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mistral_tokens = getattr(summary, "mistral_tokens", 0) or 0
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mistral_cost = getattr(summary, "mistral_cost", 0.0) or 0.0
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# If mistral (HuggingFace) cost is 0 but there are calls, calculate from usage logs
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if mistral_calls > 0 and mistral_cost == 0.0:
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mistral_logs = self.db.query(APIUsageLog).filter(
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APIUsageLog.user_id == user_id,
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APIUsageLog.provider == APIProvider.MISTRAL,
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APIUsageLog.billing_period == billing_period
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).all()
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if mistral_logs:
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mistral_cost = sum(float(log.cost_total or 0.0) for log in mistral_logs)
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logger.info(f"[UsageStats] Calculated mistral (HuggingFace) cost from {len(mistral_logs)} logs: ${mistral_cost:.6f}")
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provider_breakdown['huggingface'] = {
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'calls': mistral_calls,
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'tokens': mistral_tokens,
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'cost': mistral_cost
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}
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# Calculate total cost from provider breakdown if summary total_cost is 0
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calculated_total_cost = gemini_cost + mistral_cost
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summary_total_cost = summary.total_cost or 0.0
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# Use calculated cost if summary cost is 0, otherwise use summary cost (it's more accurate)
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final_total_cost = summary_total_cost if summary_total_cost > 0 else calculated_total_cost
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# If we calculated costs from logs, update the summary for future requests
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if calculated_total_cost > 0 and summary_total_cost == 0.0:
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logger.info(f"[UsageStats] Updating summary costs: total_cost={final_total_cost:.6f}, gemini_cost={gemini_cost:.6f}, mistral_cost={mistral_cost:.6f}")
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summary.total_cost = final_total_cost
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summary.gemini_cost = gemini_cost
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summary.mistral_cost = mistral_cost
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try:
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self.db.commit()
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except Exception as e:
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logger.error(f"[UsageStats] Error updating summary costs: {e}")
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self.db.rollback()
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# Calculate usage percentages - only for Gemini and HuggingFace
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# Use the calculated costs for accurate percentages
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usage_percentages = {}
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if limits:
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# Gemini
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gemini_call_limit = limits['limits'].get("gemini_calls", 0) or 0
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if gemini_call_limit > 0:
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usage_percentages['gemini_calls'] = (gemini_calls / gemini_call_limit) * 100
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else:
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usage_percentages['gemini_calls'] = 0
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# HuggingFace (stored as mistral in database)
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mistral_call_limit = limits['limits'].get("mistral_calls", 0) or 0
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if mistral_call_limit > 0:
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usage_percentages['mistral_calls'] = (mistral_calls / mistral_call_limit) * 100
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else:
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usage_percentages['mistral_calls'] = 0
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# Cost usage percentage - use final_total_cost (calculated from logs if needed)
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cost_limit = limits['limits'].get('monthly_cost', 0) or 0
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if cost_limit > 0:
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usage_percentages['cost'] = (final_total_cost / cost_limit) * 100
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else:
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usage_percentages['cost'] = 0
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return {
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'billing_period': billing_period,
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'usage_status': summary.usage_status.value if hasattr(summary.usage_status, 'value') else str(summary.usage_status),
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'total_calls': summary.total_calls or 0,
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'total_tokens': summary.total_tokens or 0,
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'total_cost': final_total_cost,
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'avg_response_time': summary.avg_response_time or 0.0,
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'error_rate': summary.error_rate or 0.0,
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'limits': limits,
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'provider_breakdown': provider_breakdown,
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'alerts': [
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{
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'id': alert.id,
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'type': alert.alert_type,
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'title': alert.title,
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'message': alert.message,
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'severity': alert.severity,
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'created_at': alert.created_at.isoformat()
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}
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for alert in alerts
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],
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'usage_percentages': usage_percentages,
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'last_updated': summary.updated_at.isoformat()
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}
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def get_usage_trends(self, user_id: str, months: int = 6) -> Dict[str, Any]:
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"""Get usage trends over time."""
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# Calculate billing periods
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end_date = datetime.now()
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periods = []
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for i in range(months):
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period_date = end_date - timedelta(days=30 * i)
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periods.append(period_date.strftime("%Y-%m"))
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periods.reverse() # Oldest first
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# Get usage summaries for these periods
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summaries = self.db.query(UsageSummary).filter(
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UsageSummary.user_id == user_id,
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UsageSummary.billing_period.in_(periods)
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).order_by(UsageSummary.billing_period).all()
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# Create trends data
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trends = {
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'periods': periods,
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'total_calls': [],
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'total_cost': [],
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'total_tokens': [],
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'provider_trends': {}
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}
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summary_dict = {s.billing_period: s for s in summaries}
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for period in periods:
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summary = summary_dict.get(period)
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if summary:
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trends['total_calls'].append(summary.total_calls or 0)
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trends['total_cost'].append(summary.total_cost or 0.0)
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trends['total_tokens'].append(summary.total_tokens or 0)
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# Provider-specific trends
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for provider in APIProvider:
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provider_name = provider.value
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if provider_name not in trends['provider_trends']:
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trends['provider_trends'][provider_name] = {
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'calls': [],
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'cost': [],
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'tokens': []
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}
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trends['provider_trends'][provider_name]['calls'].append(
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getattr(summary, f"{provider_name}_calls", 0) or 0
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)
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trends['provider_trends'][provider_name]['cost'].append(
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getattr(summary, f"{provider_name}_cost", 0.0) or 0.0
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)
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trends['provider_trends'][provider_name]['tokens'].append(
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getattr(summary, f"{provider_name}_tokens", 0) or 0
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)
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else:
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# No data for this period
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trends['total_calls'].append(0)
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trends['total_cost'].append(0.0)
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trends['total_tokens'].append(0)
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for provider in APIProvider:
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provider_name = provider.value
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if provider_name not in trends['provider_trends']:
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trends['provider_trends'][provider_name] = {
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'calls': [],
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'cost': [],
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'tokens': []
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}
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trends['provider_trends'][provider_name]['calls'].append(0)
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trends['provider_trends'][provider_name]['cost'].append(0.0)
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trends['provider_trends'][provider_name]['tokens'].append(0)
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return trends
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async def enforce_usage_limits(self, user_id: str, provider: APIProvider,
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tokens_requested: int = 0) -> Tuple[bool, str, Dict[str, Any]]:
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"""Enforce usage limits before making an API call."""
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# Check short-lived cache first (30s)
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cache_key = f"{user_id}:{provider.value}"
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now = datetime.utcnow()
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cached = self._enforce_cache.get(cache_key)
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if cached and cached.get('expires_at') and cached['expires_at'] > now:
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return tuple(cached['result']) # type: ignore
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result = self.pricing_service.check_usage_limits(
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user_id=user_id,
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provider=provider,
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tokens_requested=tokens_requested
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)
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self._enforce_cache[cache_key] = {
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'result': result,
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'expires_at': now + timedelta(seconds=30)
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}
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return result
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async def reset_current_billing_period(self, user_id: str) -> Dict[str, Any]:
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"""Reset usage status and counters for the current billing period (after plan renewal/change)."""
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try:
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billing_period = datetime.now().strftime("%Y-%m")
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summary = self.db.query(UsageSummary).filter(
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UsageSummary.user_id == user_id,
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UsageSummary.billing_period == billing_period
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).first()
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if not summary:
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# Nothing to reset
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return {"reset": False, "reason": "no_summary"}
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# CRITICAL: Reset ALL usage counters to 0 so user gets fresh limits with new/renewed plan
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# Clear LIMIT_REACHED status
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summary.usage_status = UsageStatus.ACTIVE
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# Reset all LLM provider call counters
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summary.gemini_calls = 0
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summary.openai_calls = 0
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summary.anthropic_calls = 0
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summary.mistral_calls = 0
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# Reset all LLM provider token counters
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summary.gemini_tokens = 0
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summary.openai_tokens = 0
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summary.anthropic_tokens = 0
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summary.mistral_tokens = 0
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# Reset search/research provider counters
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summary.tavily_calls = 0
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summary.serper_calls = 0
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summary.metaphor_calls = 0
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summary.firecrawl_calls = 0
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# Reset image generation counters
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summary.stability_calls = 0
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# Reset video generation counters
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summary.video_calls = 0
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# Reset image editing counters
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summary.image_edit_calls = 0
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# Reset cost counters
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summary.gemini_cost = 0.0
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summary.openai_cost = 0.0
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summary.anthropic_cost = 0.0
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summary.mistral_cost = 0.0
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summary.tavily_cost = 0.0
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summary.serper_cost = 0.0
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summary.metaphor_cost = 0.0
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summary.firecrawl_cost = 0.0
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summary.stability_cost = 0.0
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summary.exa_cost = 0.0
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summary.video_cost = 0.0
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summary.image_edit_cost = 0.0
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# Reset totals
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summary.total_calls = 0
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summary.total_tokens = 0
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summary.total_cost = 0.0
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summary.updated_at = datetime.utcnow()
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self.db.commit()
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logger.info(f"Reset usage counters for user {user_id} in billing period {billing_period} after renewal")
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return {"reset": True, "counters_reset": True}
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except Exception as e:
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self.db.rollback()
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logger.error(f"Error resetting usage status: {e}")
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return {"reset": False, "error": str(e)}
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