import uuid
from datetime import datetime

from sqlalchemy import String, Text, DateTime, ForeignKey, Uuid, func
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class Group(Base):
    __tablename__ = "groups"

    id: Mapped[uuid.UUID] = mapped_column(Uuid, primary_key=True, default=uuid.uuid4)
    name: Mapped[str] = mapped_column(String(128), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    organization_id: Mapped[uuid.UUID | None] = mapped_column(
        ForeignKey("organizations.id"), nullable=True, index=True
    )
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
    )

    members: Mapped[list["GroupMember"]] = relationship(
        back_populates="group", cascade="all, delete-orphan"
    )


class GroupMember(Base):
    __tablename__ = "group_members"

    id: Mapped[uuid.UUID] = mapped_column(Uuid, primary_key=True, default=uuid.uuid4)
    group_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("groups.id"), nullable=False, index=True)
    # FK to duniter_identities when the member is a known WoT member; nullable for free-text entries
    identity_id: Mapped[uuid.UUID | None] = mapped_column(
        ForeignKey("duniter_identities.id"), nullable=True
    )
    display_name: Mapped[str] = mapped_column(String(128), nullable=False)
    added_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    group: Mapped["Group"] = relationship(back_populates="members")