"""Analytics metric snapshot model."""
from datetime import datetime
from typing import Optional, Dict, Any
from pydantic import BaseModel, Field


class MetricModel(BaseModel):
    metric_id: str = Field(..., description="Unique metric identifier (UUID)")
    metric_type: str = Field(..., description="Type of metric")
    merchant_id: str = Field(..., description="Merchant this metric belongs to")
    period: str = Field(..., description="Aggregation period: hourly | daily | weekly | monthly")
    period_start: datetime = Field(..., description="Start of the aggregation period")
    period_end: datetime = Field(..., description="End of the aggregation period")
    value: float = Field(..., description="Metric value")
    dimensions: Optional[Dict[str, Any]] = Field(None, description="Breakdown dimensions (source, category, etc.)")
    metadata: Optional[Dict[str, Any]] = Field(None)
    created_at: datetime = Field(default_factory=datetime.utcnow)
    updated_at: Optional[datetime] = Field(None)