"""add vocab bank tables

Revision ID: 0008
Revises: 0007
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 = "0008"
down_revision: Union[str, None] = "0007"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "user_language_pair",
        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("source_lang", sa.String(2), nullable=False),
        sa.Column("target_lang", sa.String(2), nullable=False),
        sa.UniqueConstraint("user_id", "source_lang", "target_lang", name="uq_user_language_pair"),
    )
    op.create_index("ix_user_language_pair_user_id", "user_language_pair", ["user_id"])

    op.create_table(
        "learnable_word_bank_entry",
        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(
            "language_pair_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("user_language_pair.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column(
            "sense_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("dictionary_sense.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column(
            "wordform_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("dictionary_wordform.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column("surface_text", sa.Text(), nullable=False),
        sa.Column("is_phrase", sa.Boolean(), nullable=False, server_default="false"),
        sa.Column("entry_pathway", sa.Text(), nullable=False),
        sa.Column("source_article_id", postgresql.UUID(as_uuid=True), nullable=True),
        sa.Column("disambiguation_status", sa.Text(), nullable=False, server_default="pending"),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.func.now(),
        ),
    )
    op.create_index(
        "ix_learnable_word_bank_entry_user_id", "learnable_word_bank_entry", ["user_id"]
    )
    op.create_index(
        "ix_learnable_word_bank_entry_language_pair_id",
        "learnable_word_bank_entry",
        ["language_pair_id"],
    )
    op.create_index(
        "ix_learnable_word_bank_entry_sense_id", "learnable_word_bank_entry", ["sense_id"]
    )


def downgrade() -> None:
    op.drop_index("ix_learnable_word_bank_entry_sense_id", table_name="learnable_word_bank_entry")
    op.drop_index(
        "ix_learnable_word_bank_entry_language_pair_id", table_name="learnable_word_bank_entry"
    )
    op.drop_index("ix_learnable_word_bank_entry_user_id", table_name="learnable_word_bank_entry")
    op.drop_table("learnable_word_bank_entry")
    op.drop_index("ix_user_language_pair_user_id", table_name="user_language_pair")
    op.drop_table("user_language_pair")