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 StudySetupConfigVersion(Base):
    __tablename__ = "study_setup_config_versions"
    __table_args__ = (
        UniqueConstraint("study_id", "version", name="uq_setup_config_versions_study_version"),
        UniqueConstraint("study_id", "branch_name", "branch_seq", name="uq_setup_config_versions_study_branch_seq"),
    )

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    study_setup_config_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("study_setup_configs.id"), nullable=False, index=True
    )
    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)
    display_version: Mapped[int] = mapped_column(Integer, nullable=False)
    branch_name: Mapped[str] = mapped_column(nullable=False, default="main")
    branch_seq: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
    version_label: Mapped[str] = mapped_column(nullable=False, default="")
    source_version: Mapped[int | None] = mapped_column(Integer, nullable=True)
    parent_version_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("study_setup_config_versions.id", ondelete="SET NULL"), nullable=True
    )
    merged_from_version_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("study_setup_config_versions.id", ondelete="SET NULL"), nullable=True
    )
    config: Mapped[dict] = mapped_column(JSONB, nullable=False)
    published_project_snapshot: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
    published_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
    published_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())