import uuid
from typing import Optional, List
from decimal import Decimal

from pydantic import BaseModel, Field

from barker.schemas import to_camel
from barker.schemas.customer import CustomerLink
from barker.schemas.modifier import ModifierLink
from barker.schemas.product import ProductLink
from barker.schemas.table import TableLink
from barker.schemas.tax import TaxLink


class Inventory(BaseModel):
    id_: Optional[uuid.UUID]
    product: ProductLink
    quantity: Decimal = Field(ge=0, multiple_of=0.01)
    price: Optional[Decimal]
    tax: Optional[TaxLink]
    tax_rate: Optional[Decimal]
    discount: Decimal = Field(ge=0, multiple_of=0.00001, le=1)
    is_happy_hour: bool
    modifiers: Optional[List[ModifierLink]]
    amount: Optional[Decimal]

    class Config:
        alias_generator = to_camel


class Kot(BaseModel):
    id_: Optional[uuid.UUID]
    inventories: List[Inventory]

    class Config:
        anystr_strip_whitespace = True
        alias_generator = to_camel


class VoucherIn(BaseModel):
    pax: int
    table: TableLink
    customer: Optional[CustomerLink]
    kots: List[Kot]

    class Config:
        fields = {"id_": "id"}
        anystr_strip_whitespace = True
        alias_generator = to_camel


class Voucher(VoucherIn):
    id_: uuid.UUID

    class Config:
        fields = {"id_": "id"}
        anystr_strip_whitespace = True
        alias_generator = to_camel