"""add chat bans for moderation

Revision ID: 0024_chat_bans
Revises: 0023_privacy_pm_level
Create Date: 2026-03-09 01:10:00.000000
"""

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = "0024_chat_bans"
down_revision: Union[str, Sequence[str], None] = "0023_privacy_pm_level"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "chat_bans",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column("chat_id", sa.Integer(), nullable=False),
        sa.Column("user_id", sa.Integer(), nullable=False),
        sa.Column("banned_by_user_id", sa.Integer(), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
        sa.ForeignKeyConstraint(["chat_id"], ["chats.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["banned_by_user_id"], ["users.id"], ondelete="CASCADE"),
        sa.PrimaryKeyConstraint("id"),
        sa.UniqueConstraint("chat_id", "user_id", name="uq_chat_bans_chat_user"),
    )
    op.create_index("ix_chat_bans_id", "chat_bans", ["id"], unique=False)
    op.create_index("ix_chat_bans_chat_id", "chat_bans", ["chat_id"], unique=False)
    op.create_index("ix_chat_bans_user_id", "chat_bans", ["user_id"], unique=False)
    op.create_index("ix_chat_bans_banned_by_user_id", "chat_bans", ["banned_by_user_id"], unique=False)


def downgrade() -> None:
    op.drop_index("ix_chat_bans_banned_by_user_id", table_name="chat_bans")
    op.drop_index("ix_chat_bans_user_id", table_name="chat_bans")
    op.drop_index("ix_chat_bans_chat_id", table_name="chat_bans")
    op.drop_index("ix_chat_bans_id", table_name="chat_bans")
    op.drop_table("chat_bans")