"""add flashcard tables

Revision ID: 0009
Revises: 0008
Create Date: 2026-04-08

"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects import postgresql

revision: str = "0009"
down_revision: Union[str, None] = "0008"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "flashcard",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        sa.Column(
            "user_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("users.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column(
            "bank_entry_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("learnable_word_bank_entry.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("source_lang", sa.Text(), nullable=False),
        sa.Column("target_lang", sa.Text(), nullable=False),
        sa.Column("prompt_text", sa.Text(), nullable=False),
        sa.Column("answer_text", sa.Text(), nullable=False),
        sa.Column("prompt_context_text", sa.Text(), nullable=True),
        sa.Column("answer_context_text", sa.Text(), nullable=True),
        sa.Column("card_direction", sa.Text(), nullable=False),
        sa.Column("prompt_modality", sa.Text(), nullable=False, server_default="text"),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.func.now(),
        ),
    )
    op.create_index("ix_flashcard_user_id", "flashcard", ["user_id"])
    op.create_index("ix_flashcard_bank_entry_id", "flashcard", ["bank_entry_id"])

    op.create_table(
        "flashcard_event",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        sa.Column(
            "flashcard_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("flashcard.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column(
            "user_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("users.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("event_type", sa.Text(), nullable=False),
        sa.Column("user_response", sa.Text(), nullable=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.func.now(),
        ),
    )
    op.create_index("ix_flashcard_event_flashcard_id", "flashcard_event", ["flashcard_id"])
    op.create_index("ix_flashcard_event_user_id", "flashcard_event", ["user_id"])


def downgrade() -> None:
    op.drop_index("ix_flashcard_event_user_id", table_name="flashcard_event")
    op.drop_index("ix_flashcard_event_flashcard_id", table_name="flashcard_event")
    op.drop_table("flashcard_event")
    op.drop_index("ix_flashcard_bank_entry_id", table_name="flashcard")
    op.drop_index("ix_flashcard_user_id", table_name="flashcard")
    op.drop_table("flashcard")