from datetime import date, datetime
from decimal import Decimal

from pydantic import BaseModel, ConfigDict, field_validator

from app.services.vehicle_identity import validate_vin


class CarBase(BaseModel):
    name: str
    make: str | None = None
    model: str | None = None
    trim: str | None = None
    generation: str | None = None
    body_type: str | None = None
    year: int | None = None
    plate_number: str | None = None
    vin: str | None = None
    fuel_type: str | None = None
    engine_volume_l: Decimal | None = None
    transmission: str | None = None
    drive_type: str | None = None
    target_consumption_l_per_100km: Decimal | None = None
    fuel_tank_volume_l: Decimal | None = None
    engine_oil_type: str | None = None
    engine_oil_volume_l: Decimal | None = None
    transmission_fluid_type: str | None = None
    transmission_fluid_volume_l: Decimal | None = None
    coolant_type: str | None = None
    brake_fluid_type: str | None = None
    tire_pressure_front_bar: Decimal | None = None
    tire_pressure_rear_bar: Decimal | None = None
    tire_size: str | None = None
    oil_change_interval_km: int | None = None
    oil_change_interval_months: int | None = None
    purchase_date: date | None = None
    purchase_price: Decimal | None = None
    purchase_currency: str | None = None
    purchase_type: str = "unknown"
    currency: str = "RUB"
    include_depreciation: bool = False
    expected_ownership_months: int | None = None
    expected_residual_value: Decimal | None = None
    loan_principal: Decimal | None = None
    loan_down_payment: Decimal | None = None
    loan_term_months: int | None = None
    loan_annual_interest_rate: Decimal | None = None
    loan_first_payment_date: date | None = None
    loan_payment_day: int | None = None
    loan_payment_type: str = "annuity"
    loan_currency: str | None = None
    loan_comment: str | None = None
    current_odometer: int | None = None
    notes: str | None = None

    @field_validator("vin")
    @classmethod
    def validate_vin_field(cls, value: str | None) -> str | None:
        return validate_vin(value)


class CarCreate(CarBase):
    owner_id: int | None = None


class CarUpdate(BaseModel):
    name: str | None = None
    make: str | None = None
    model: str | None = None
    trim: str | None = None
    generation: str | None = None
    body_type: str | None = None
    year: int | None = None
    plate_number: str | None = None
    vin: str | None = None
    fuel_type: str | None = None
    engine_volume_l: Decimal | None = None
    transmission: str | None = None
    drive_type: str | None = None
    target_consumption_l_per_100km: Decimal | None = None
    fuel_tank_volume_l: Decimal | None = None
    engine_oil_type: str | None = None
    engine_oil_volume_l: Decimal | None = None
    transmission_fluid_type: str | None = None
    transmission_fluid_volume_l: Decimal | None = None
    coolant_type: str | None = None
    brake_fluid_type: str | None = None
    tire_pressure_front_bar: Decimal | None = None
    tire_pressure_rear_bar: Decimal | None = None
    tire_size: str | None = None
    oil_change_interval_km: int | None = None
    oil_change_interval_months: int | None = None
    purchase_date: date | None = None
    purchase_price: Decimal | None = None
    purchase_currency: str | None = None
    purchase_type: str | None = None
    currency: str | None = None
    include_depreciation: bool | None = None
    expected_ownership_months: int | None = None
    expected_residual_value: Decimal | None = None
    loan_principal: Decimal | None = None
    loan_down_payment: Decimal | None = None
    loan_term_months: int | None = None
    loan_annual_interest_rate: Decimal | None = None
    loan_first_payment_date: date | None = None
    loan_payment_day: int | None = None
    loan_payment_type: str | None = None
    loan_currency: str | None = None
    loan_comment: str | None = None
    current_odometer: int | None = None
    notes: str | None = None

    @field_validator("vin")
    @classmethod
    def validate_vin_field(cls, value: str | None) -> str | None:
        return validate_vin(value)


class CarRead(CarBase):
    id: int
    owner_id: int
    created_at: datetime

    model_config = ConfigDict(from_attributes=True)


class CarTrimRead(BaseModel):
    id: int
    name: str
    body_type: str | None = None
    fuel_type: str | None = None
    transmission: str | None = None
    drive_type: str | None = None
    year_from: int | None = None
    year_to: int | None = None
    market: str | None = None

    model_config = ConfigDict(from_attributes=True)


class CarModelRead(BaseModel):
    id: int
    name: str
    trims: list[CarTrimRead] = []

    model_config = ConfigDict(from_attributes=True)


class CarMakeRead(BaseModel):
    id: int
    name: str
    country: str | None = None
    models: list[CarModelRead] = []

    model_config = ConfigDict(from_attributes=True)