import uuid

from datetime import date, datetime
from decimal import Decimal
from typing import Optional

from brewman.schemas import to_camel
from pydantic import BaseModel, Field, validator


class AccountLink(BaseModel):
    id_: uuid.UUID = Field(...)
    name: Optional[str]

    class Config:
        fields = {"id_": "id"}


class CostCentreLink(BaseModel):
    id_: uuid.UUID = Field(...)
    name: Optional[str]

    class Config:
        fields = {"id_": "id"}


class EmployeeLink(BaseModel):
    id_: uuid.UUID = Field(...)
    name: Optional[str]
    designation: Optional[str]
    cost_centre: CostCentreLink

    class Config:
        alias_generator = to_camel


class ProductGroupIn(BaseModel):
    name: str = Field(..., min_length=1)


class ProductGroup(ProductGroupIn):
    id_: uuid.UUID
    is_fixture: bool

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


class ProductGroupLink(BaseModel):
    id_: uuid.UUID = Field(...)

    class Config:
        fields = {"id_": "id"}


class ProductLink(BaseModel):
    id_: uuid.UUID = Field(...)
    name: Optional[str]

    class Config:
        fields = {"id_": "id"}


class ProductIn(BaseModel):
    name: str = Field(..., min_length=1)
    units: str
    fraction: Decimal = Field(ge=1, default=1)
    fraction_units: str
    product_yield: Decimal = Field(gt=0, le=1, default=1)
    product_group: ProductGroupLink = Field(...)
    price: Decimal = Field(ge=0, multiple_of=0.01, default=0)
    sale_price: Decimal = Field(ge=0, multiple_of=0.01, default=0)
    is_active: bool
    is_purchased: bool
    is_sold: bool

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


class Product(ProductIn):
    id_: uuid.UUID
    code: int
    account: AccountLink = Field(...)
    is_fixture: bool


class Recipe(BaseModel):
    id_: uuid.UUID
    product_id: uuid.UUID

    quantity: Decimal
    cost_price: Decimal
    sale_price: Decimal
    notes: str

    valid_from: date
    valid_to: date

    effective_from: date
    effective_to: date


class RecipeItem(BaseModel):
    id_: uuid.UUID
    recipe_id: uuid.UUID
    product_id: uuid.UUID
    quantity: int
    price: int


class CostCentreIn(BaseModel):
    name: str = Field(..., min_length=1)


class CostCentre(CostCentreIn):
    id_: uuid.UUID
    is_fixture: bool

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


class AccountBase(BaseModel):
    name: str = Field(..., min_length=1)
    is_starred: bool
    is_active: bool
    cost_centre: CostCentreLink

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


class AccountIn(AccountBase):
    type: int
    is_reconcilable: bool


class Account(AccountIn):
    id_: uuid.UUID
    code: int
    is_fixture: bool


class EmployeeIn(AccountBase):
    designation: str
    salary: int = Field(ge=0)
    points: Decimal = Field(ge=0, lt=1000, multiple_of=0.01)
    joining_date: date
    leaving_date: Optional[date]

    @validator("joining_date", pre=True)
    def parse_joining_date(cls, value):
        return datetime.strptime(value, "%d-%b-%Y").date()

    @validator("leaving_date", pre=True)
    def parse_leaving_date(cls, value):
        if value is None or value == "":
            return None
        else:
            return datetime.strptime(value, "%d-%b-%Y").date()

    @validator("leaving_date")
    def leaving_date_more_than_joining_date(cls, v, values, **kwargs):
        if values["is_active"]:
            return None
        if v < values["joining_date"]:
            raise ValueError("Leaving Date cannot be less than Joining Date")
        return v


class Employee(EmployeeIn):
    id_: uuid.UUID
    code: int
    is_fixture: bool


class DbSetting(BaseModel):
    id_: uuid.UUID
    name: str
    data: bytes


class AccountType(BaseModel):
    id_: int
    name: str

    class Config:
        fields = {"id_": "id"}