from __future__ import annotations
from typing import Optional

import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Integer, UniqueConstraint, func
from sqlalchemy.dialects.postgresql import JSONB, UUID
from sqlalchemy.orm import Mapped, mapped_column

from app.db.base_class import Base


class StudySetupConfig(Base):
    __tablename__ = "study_setup_configs"
    __table_args__ = (UniqueConstraint("study_id", name="uq_study_setup_config_study"),)

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    study_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("studies.id"), nullable=False, index=True)
    version: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
    config: Mapped[dict] = mapped_column(JSONB, nullable=False)
    publish_status: Mapped[str] = mapped_column(default="DRAFT", nullable=False)
    published_config: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
    published_project_snapshot: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
    current_branch_name: Mapped[str] = mapped_column(nullable=False, default="main")
    active_branch_base_version_id: Mapped[Optional[uuid.UUID]] = mapped_column(
        UUID(as_uuid=True), ForeignKey("study_setup_config_versions.id", ondelete="SET NULL"), nullable=True
    )
    current_published_version_id: Mapped[Optional[uuid.UUID]] = mapped_column(
        UUID(as_uuid=True), ForeignKey("study_setup_config_versions.id", ondelete="SET NULL"), nullable=True
    )
    published_by: Mapped[Optional[uuid.UUID]] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
    published_at: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True), nullable=True)
    saved_by: Mapped[Optional[uuid.UUID]] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now()
    )