"""
模型数据传输对象定义（新表结构）
"""
from datetime import datetime
from typing import Any, Generic, List, Optional, TypeVar
from decimal import Decimal
from pydantic import BaseModel, ConfigDict

T = TypeVar("T")


class ModelPriceNewResponse(BaseModel):
    """单条价格记录响应"""
    id: int
    label: str
    tier_min: Optional[Decimal] = None
    tier_max: Optional[Decimal] = None
    tier_unit: Optional[str] = None
    input_price_original: Decimal
    output_price_original: Decimal
    discount_rate: Decimal
    discount_label: Optional[str] = None  # 如 "1折"、"5折"
    input_price_discounted: Decimal
    output_price_discounted: Decimal
    currency: str = "CNY"
    unit: str
    display_multiplier: int = 1000000

    model_config = ConfigDict(from_attributes=True)


class ModelResponse(BaseModel):
    """模型详情响应"""
    id: int
    model_code: str
    display_name: Optional[str] = None
    img: Optional[str] = None
    tag1: Optional[str] = None
    tag2: Optional[str] = None
    description: Optional[str] = None
    custom_description: Optional[str] = None
    keywords: Optional[str] = None
    display_tags: Optional[List[str]] = None
    input_modalities: Optional[List[str]] = None
    output_modalities: Optional[List[str]] = None
    features: Optional[Any] = None
    rate_limits: Optional[Any] = None
    tool_call_prices: Optional[Any] = None
    categories: List[int] = []
    category: Optional[int] = None  # 兼容字段，取 categories[0]
    supplier: str
    is_featured: bool = False
    is_search: bool = False
    is_thinking: bool = False
    is_api_enabled: bool = False
    is_show_enabled: bool = True
    source_url: Optional[str] = None
    crawled_at: Optional[datetime] = None
    created_at: datetime
    updated_at: datetime

    # 前端兼容字段
    title: Optional[str] = None   # = model_code
    name: Optional[str] = None    # = display_name
    keyword: Optional[str] = None # = keywords

    model_config = ConfigDict(from_attributes=True)


class ModelListResponse(BaseModel):
    """模型列表响应（含价格）"""
    id: int
    model_code: str
    display_name: Optional[str] = None
    img: Optional[str] = None
    tag1: Optional[str] = None
    tag2: Optional[str] = None
    description: Optional[str] = None
    custom_description: Optional[str] = None
    keywords: Optional[str] = None
    display_tags: Optional[List[str]] = None
    categories: List[int] = []
    category: Optional[int] = None  # 兼容字段，取 categories[0]
    supplier: str
    is_featured: bool = False
    is_search: bool = False
    is_thinking: bool = False
    is_api_enabled: bool = False
    is_show_enabled: bool = True
    created_at: datetime
    updated_at: datetime

    # 前端兼容字段（旧字段名映射）
    title: Optional[str] = None      # = model_code
    name: Optional[str] = None       # = display_name
    keyword: Optional[str] = None    # = keywords

    # 价格列表（is_active=true 的所有记录）
    prices: List[ModelPriceNewResponse] = []

    model_config = ConfigDict(from_attributes=True)


class PaginatedResponse(BaseModel, Generic[T]):
    """分页响应"""
    total: int
    page: int
    page_size: int
    items: List[T]


class ApiResponse(BaseModel, Generic[T]):
    """统一API响应"""
    code: int
    message: str
    data: Optional[T] = None


class KeywordsResponse(BaseModel):
    keywords: List[str]


class FeaturedModelsResponse(BaseModel):
    items: List[ModelListResponse]


class ModelPricingResponse(BaseModel):
    """模型定价信息（用于 /pricing/{model_code} 端点）"""
    model_code: str
    display_name: Optional[str] = None
    description: Optional[str] = None
    custom_description: Optional[str] = None
    features: Optional[Any] = None
    rate_limits: Optional[Any] = None
    tool_call_prices: Optional[Any] = None
    display_tags: Optional[List[str]] = None
    input_modalities: Optional[List[str]] = None
    output_modalities: Optional[List[str]] = None
    categories: List[int] = []
    source_keys: Optional[List[str]] = None
    normalized_keys: Optional[List[str]] = None
    is_api_enabled: bool = False
    prices: List[ModelPriceNewResponse] = []