"""
开放平台统计和日志数据传输对象定义

定义调用统计和费用明细相关API请求和响应的数据结构
需求: 11.1, 11.2, 12.1, 12.2
"""
from datetime import date, datetime
from decimal import Decimal
from typing import List, Optional
from pydantic import BaseModel, ConfigDict, Field


class TrendItem(BaseModel):
    """趋势数据项
    
    需求 11.3: 显示调用趋势图，支持按日、周、月切换
    """
    date: str = Field(..., description="日期")
    count: int = Field(..., description="调用次数")
    cost: Decimal = Field(..., description="消费金额")


class ModelDistItem(BaseModel):
    """模型分布项
    
    需求 11.4: 显示各模型调用占比饼图
    """
    model_name: str = Field(..., description="模型名称")
    count: int = Field(..., description="调用次数")
    percentage: float = Field(..., description="占比百分比")


class StatsResponse(BaseModel):
    """统计响应
    
    需求 11.1: 显示今日调用次数、本月调用次数、总调用次数
    需求 11.2: 显示今日消费金额、本月消费金额
    """
    today_calls: int = Field(..., description="今日调用次数")
    month_calls: int = Field(..., description="本月调用次数")
    total_calls: int = Field(..., description="总调用次数")
    today_cost: Decimal = Field(..., description="今日消费金额")
    month_cost: Decimal = Field(..., description="本月消费金额")
    trend_data: List[TrendItem] = Field(default_factory=list, description="趋势数据")
    model_distribution: List[ModelDistItem] = Field(default_factory=list, description="模型分布")


class CallLogQuery(BaseModel):
    """调用日志查询参数
    
    需求 12.1: 支持按时间范围、模型、API Key进行筛选
    需求 12.4: 支持分页查询
    """
    start_date: Optional[date] = Field(None, description="开始日期")
    end_date: Optional[date] = Field(None, description="结束日期")
    model_id: Optional[int] = Field(None, description="模型ID")
    api_key_id: Optional[int] = Field(None, description="API Key ID")
    page: int = Field(default=1, ge=1, description="页码")
    page_size: int = Field(default=20, ge=1, le=100, description="每页数量")


class CallLogResponse(BaseModel):
    """调用日志响应
    
    需求 12.2: 显示调用时间、模型名称、Token用量（输入/输出）、费用金额、使用的API Key
    """
    id: int
    model_name: str = Field(..., description="模型名称")
    is_local: bool = Field(..., description="是否为本地模型")
    input_tokens: int = Field(..., description="输入Token数")
    output_tokens: int = Field(..., description="输出Token数")
    bill: Decimal = Field(..., description="费用金额")
    status: str = Field(..., description="调用状态")
    api_key_prefix: str = Field(..., description="API Key前缀")
    created_at: datetime = Field(..., description="调用时间")
    
    # 价格信息（用于显示计费明细）
    input_price: Optional[Decimal] = Field(None, description="输入单价（每token）")
    output_price: Optional[Decimal] = Field(None, description="输出单价（每token）")

    model_config = ConfigDict(from_attributes=True)