import enum
import uuid
from datetime import datetime

from sqlalchemy import DateTime, Enum, ForeignKey, String, Text, func
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.base import Base, TimestampMixin, UUIDMixin


class ProtocolStatus(str, enum.Enum):
    generating = "generating"
    done = "done"
    error = "error"


class Protocol(UUIDMixin, TimestampMixin, Base):
    __tablename__ = "protocols"

    transcription_id: Mapped[uuid.UUID] = mapped_column(
        ForeignKey("transcriptions.id", ondelete="CASCADE")
    )
    template_id: Mapped[uuid.UUID] = mapped_column(
        ForeignKey("prompt_templates.id")
    )
    content: Mapped[dict] = mapped_column(JSONB, default=dict)
    raw_text: Mapped[str] = mapped_column(Text, default="")
    llm_model: Mapped[str] = mapped_column(String(100))
    status: Mapped[ProtocolStatus] = mapped_column(
        Enum(ProtocolStatus), default=ProtocolStatus.generating
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
    )

    transcription: Mapped["Transcription"] = relationship(back_populates="protocols")
    template: Mapped["PromptTemplate"] = relationship(back_populates="protocols")
    export_files: Mapped[list["ExportFile"]] = relationship(back_populates="protocol")