import uuid
from datetime import datetime

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

from app.database import Base


class Decision(Base):
    __tablename__ = "decisions"

    id: Mapped[uuid.UUID] = mapped_column(Uuid, primary_key=True, default=uuid.uuid4)
    title: Mapped[str] = mapped_column(String(256), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    context: Mapped[str | None] = mapped_column(Text)
    decision_type: Mapped[str] = mapped_column(String(64), nullable=False)  # runtime_upgrade, document_change, mandate_vote, custom
    status: Mapped[str] = mapped_column(String(32), default="draft")  # draft, qualification, review, voting, executed, closed
    voting_protocol_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("voting_protocols.id"))
    created_by_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("duniter_identities.id"))
    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())

    steps: Mapped[list["DecisionStep"]] = relationship(back_populates="decision", cascade="all, delete-orphan", order_by="DecisionStep.step_order")


class DecisionStep(Base):
    __tablename__ = "decision_steps"

    id: Mapped[uuid.UUID] = mapped_column(Uuid, primary_key=True, default=uuid.uuid4)
    decision_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("decisions.id"), nullable=False)
    step_order: Mapped[int] = mapped_column(Integer, nullable=False)
    step_type: Mapped[str] = mapped_column(String(32), nullable=False)  # qualification, review, vote, execution, reporting
    title: Mapped[str | None] = mapped_column(String(256))
    description: Mapped[str | None] = mapped_column(Text)
    status: Mapped[str] = mapped_column(String(32), default="pending")  # pending, active, completed, skipped
    vote_session_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("vote_sessions.id"))
    outcome: Mapped[str | None] = mapped_column(Text)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    decision: Mapped["Decision"] = relationship(back_populates="steps")