import uuid
from datetime import datetime, date
from decimal import Decimal
from typing import Literal
from pydantic import BaseModel, ConfigDict, model_validator


class StoreCreate(BaseModel):
    name: str
    location: str | None = None
    url: str | None = None
    store_type: str | None = None


class StoreUpdate(BaseModel):
    name: str | None = None
    location: str | None = None
    url: str | None = None
    store_type: str | None = None


class StoreResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: uuid.UUID
    name: str
    location: str | None
    url: str | None
    store_type: str | None


class ProductCreate(BaseModel):
    name: str
    brand: str | None = None
    category: str | None = None
    description: str | None = None
    default_unit: str | None = None
    barcode: str | None = None
    price: Decimal | None = None
    quantity_per_unit: Decimal | None = None
    default_store_id: uuid.UUID | None = None
    image_path: str | None = None
    thumbnail_path: str | None = None
    tags: list[str] | None = None


class ProductUpdate(BaseModel):
    name: str | None = None
    brand: str | None = None
    category: str | None = None
    description: str | None = None
    default_unit: str | None = None
    barcode: str | None = None
    price: Decimal | None = None
    quantity_per_unit: Decimal | None = None
    default_store_id: uuid.UUID | None = None
    image_path: str | None = None
    thumbnail_path: str | None = None
    tags: list[str] | None = None


class ProductResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: uuid.UUID
    name: str
    brand: str | None
    category: str | None
    description: str | None
    default_unit: str | None
    barcode: str | None
    price: Decimal | None
    quantity_per_unit: Decimal | None
    default_store_id: uuid.UUID | None
    frequency_score: int
    last_purchased_at: date | None
    avg_interval_days: Decimal | None
    image_path: str | None
    thumbnail_path: str | None
    tags: list[str] | None


class ListItemCreate(BaseModel):
    product_id: uuid.UUID | None = None
    custom_name: str | None = None
    quantity: Decimal | None = None
    unit: str | None = None

    @model_validator(mode='after')
    def must_have_name(self) -> 'ListItemCreate':
        if not self.product_id and not self.custom_name:
            raise ValueError('product_id ou custom_name requis')
        return self


class ListItemUpdate(BaseModel):
    is_checked: bool | None = None
    quantity: Decimal | None = None
    unit: str | None = None
    price_recorded: Decimal | None = None


class ListItemResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: uuid.UUID
    product_id: uuid.UUID | None
    custom_name: str | None
    display_name: str
    quantity: Decimal | None
    unit: str | None
    is_checked: bool
    price_recorded: Decimal | None
    carried_over: bool
    sort_order: int | None


class ShoppingListCreate(BaseModel):
    name: str | None = None
    store_id: uuid.UUID | None = None
    week_date: date | None = None


class ShoppingListUpdate(BaseModel):
    name: str | None = None
    store_id: uuid.UUID | None = None
    status: Literal['draft', 'active', 'done'] | None = None


class ShoppingListResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: uuid.UUID
    name: str | None
    store_id: uuid.UUID | None
    week_date: date | None
    status: str
    created_at: datetime
    item_count: int
    checked_count: int


class ShoppingListDetailResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: uuid.UUID
    name: str | None
    store_id: uuid.UUID | None
    week_date: date | None
    status: str
    created_at: datetime
    item_count: int
    checked_count: int
    items: list[ListItemResponse]