import uuid
from datetime import datetime, timezone

from sqlalchemy import DateTime, ForeignKey, Text
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.dialects.postgresql import UUID

from ..database import Base


class FlashcardEntity(Base):
    __tablename__ = "flashcard"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    bank_entry_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("learnable_word_bank_entry.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    source_lang: Mapped[str] = mapped_column(Text, nullable=False)
    target_lang: Mapped[str] = mapped_column(Text, nullable=False)
    prompt_text: Mapped[str] = mapped_column(Text, nullable=False)
    answer_text: Mapped[str] = mapped_column(Text, nullable=False)
    prompt_context_text: Mapped[str | None] = mapped_column(Text, nullable=True)
    answer_context_text: Mapped[str | None] = mapped_column(Text, nullable=True)
    prompt_modality: Mapped[str] = mapped_column(Text, nullable=False, default="text")
    source_pack_flashcard_template_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("word_bank_pack_flashcard_template.id", ondelete="SET NULL"),
        nullable=True,
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        nullable=False,
        default=lambda: datetime.now(timezone.utc),
    )


class FlashcardEventEntity(Base):
    __tablename__ = "flashcard_event"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    flashcard_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("flashcard.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    event_type: Mapped[str] = mapped_column(Text, nullable=False)
    user_response: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        nullable=False,
        default=lambda: datetime.now(timezone.utc),
    )