import uuid
from datetime import datetime

from pydantic import BaseModel, ConfigDict


class WorkstreamDependencyCreate(BaseModel):
    to_workstream_id: uuid.UUID | None = None
    to_task_id: uuid.UUID | None = None
    relationship_type: str = "blocks"
    description: str | None = None


class WorkstreamDependencyRead(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: uuid.UUID
    from_workstream_id: uuid.UUID
    to_workstream_id: uuid.UUID | None = None
    to_task_id: uuid.UUID | None = None
    relationship_type: str
    description: str | None = None
    created_at: datetime
    updated_at: datetime


class WorkstreamDepStub(BaseModel):
    """Minimal projection of the other end of a dependency edge."""
    dep_id: uuid.UUID
    target_type: str = "workstream"
    relationship_type: str = "blocks"
    workstream_id: uuid.UUID | None = None
    workstream_slug: str | None = None
    workstream_title: str | None = None
    task_id: uuid.UUID | None = None
    task_title: str | None = None
    description: str | None = None