import enum
import uuid
from datetime import datetime
from typing import Optional

from pydantic import BaseModel, ConfigDict

from app.schemas.user import UserDisplay


class DocumentVersionStatus(str, enum.Enum):
    DRAFT = "DRAFT"
    SUBMITTED = "SUBMITTED"
    APPROVED = "APPROVED"
    EFFECTIVE = "EFFECTIVE"
    SUPERSEDED = "SUPERSEDED"
    ARCHIVED = "ARCHIVED"
    WITHDRAWN = "WITHDRAWN"


class DocumentVersionSummary(BaseModel):
    id: uuid.UUID
    version_no: str
    status: DocumentVersionStatus

    model_config = ConfigDict(from_attributes=True)


class DocumentVersionRead(BaseModel):
    id: uuid.UUID
    document_id: uuid.UUID
    version_no: str
    parent_version_id: Optional[uuid.UUID] = None
    derived_from_version_id: Optional[uuid.UUID] = None
    status: DocumentVersionStatus
    effective_at: Optional[datetime] = None
    superseded_at: Optional[datetime] = None
    file_uri: str
    original_filename: Optional[str] = None
    file_hash: str
    file_size: int
    mime_type: Optional[str] = None
    change_summary: Optional[str] = None
    created_by: Optional[uuid.UUID] = None
    created_by_user: Optional[UserDisplay] = None
    submitted_at: Optional[datetime] = None
    approved_at: Optional[datetime] = None
    withdrawn_at: Optional[datetime] = None
    created_at: datetime

    model_config = ConfigDict(from_attributes=True)