"""Pydantic v2 request schemas — catalog domain."""
from decimal import Decimal
from typing import Literal
from uuid import UUID

from pydantic import Field

from app.schemas.common import APIModel

MaterialStatus = Literal["active", "discontinued", "draft"]
AttributeDataType = Literal["number", "integer", "string", "enum", "boolean", "date"]


class UnitCreate(APIModel):
    code: str = Field(min_length=1, max_length=255)
    name_fa: str | None = None
    dimension: str | None = None
    si_factor: Decimal = Field(default=Decimal("1.0"), gt=0)
    is_base: bool = False


class UnitUpdate(APIModel):
    code: str | None = Field(default=None, min_length=1, max_length=255)
    name_fa: str | None = None
    dimension: str | None = None
    si_factor: Decimal | None = Field(default=None, gt=0)
    is_base: bool | None = None


class BrandCreate(APIModel):
    name: str = Field(min_length=1)
    country: str | None = None


class BrandUpdate(APIModel):
    name: str | None = Field(default=None, min_length=1)
    country: str | None = None


class MaterialCategoryCreate(APIModel):
    slug: str = Field(min_length=1)
    name: str = Field(min_length=1)
    description: str | None = None
    is_active: bool = True


class MaterialCategoryUpdate(APIModel):
    slug: str | None = Field(default=None, min_length=1)
    name: str | None = Field(default=None, min_length=1)
    description: str | None = None
    is_active: bool | None = None


class AttributeDefinitionCreate(APIModel):
    attribute_key: str = Field(min_length=1)
    label: str = Field(min_length=1)
    data_type: AttributeDataType
    unit_id: int | None = None
    enum_values: list | None = None


class AttributeDefinitionUpdate(APIModel):
    label: str | None = Field(default=None, min_length=1)
    data_type: AttributeDataType | None = None
    unit_id: int | None = None
    enum_values: list | None = None


class CategoryAttributeCreate(APIModel):
    attribute_definition_id: UUID
    is_required: bool = False
    is_filterable: bool = False
    conditional_rules: dict | None = None
    sort_order: int = 0


class CategoryAttributeUpdate(APIModel):
    is_required: bool | None = None
    is_filterable: bool | None = None
    conditional_rules: dict | None = None
    sort_order: int | None = None


class MaterialAttributeIn(APIModel):
    """One EAV value. `value` is coerced against attribute_definitions.data_type."""

    attribute_definition_id: UUID
    value: int | float | str | bool | None = None


class MaterialCreate(APIModel):
    name: str = Field(min_length=1)
    topic: str | None = None  # تاپیک جلوی برنامه (Persian) — legacy
    canonical_unit_id: int
    status: MaterialStatus = "active"
    brand_ids: list[UUID] = Field(default_factory=list)
    attributes: list[MaterialAttributeIn] = Field(default_factory=list)


class MaterialUpdate(APIModel):
    name: str | None = Field(default=None, min_length=1)
    topic: str | None = None
    canonical_unit_id: int | None = None
    status: MaterialStatus | None = None


class BrandMaterialCreate(APIModel):
    brand_id: UUID
    material_id: UUID
    catalog_code: str | None = None
    is_active: bool = True


class BrandMaterialUpdate(APIModel):
    # brand_id / material_id are immutable (UNIQUE pair) — not accepted here.
    catalog_code: str | None = None
    is_active: bool | None = None


class MaterialUnitCreate(APIModel):
    brand_material_id: UUID | None = None
    unit_id: int
    conversion_factor: Decimal = Field(gt=0)
    is_default: bool = False


class MaterialUnitUpdate(APIModel):
    unit_id: int | None = None
    conversion_factor: Decimal | None = Field(default=None, gt=0)
    is_default: bool | None = None


class MaterialAttributeValuesPut(APIModel):
    attributes: list[MaterialAttributeIn] = Field(default_factory=list)


class CategoryReferenceUnitPut(APIModel):
    ref_unit: str = Field(min_length=1)


class UnitConversionCreate(APIModel):
    category_id: UUID
    brand: str | None = None
    from_unit: str = Field(min_length=1)
    to_unit: str = Field(min_length=1)
    factor: Decimal = Field(gt=0)


class UnitConversionUpdate(APIModel):
    brand: str | None = None
    from_unit: str | None = Field(default=None, min_length=1)
    to_unit: str | None = Field(default=None, min_length=1)
    factor: Decimal | None = Field(default=None, gt=0)


class StandardConversionCreate(APIModel):
    from_unit: str = Field(min_length=1)
    to_unit: str = Field(min_length=1)
    factor: Decimal = Field(gt=0)


class StandardConversionUpdate(APIModel):
    from_unit: str | None = Field(default=None, min_length=1)
    to_unit: str | None = Field(default=None, min_length=1)
    factor: Decimal | None = Field(default=None, gt=0)