"""add message reactions

Revision ID: 0013_msg_reactions
Revises: 0012_user_pm_privacy
Create Date: 2026-03-08 18:40:00.000000
"""

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = "0013_msg_reactions"
down_revision: Union[str, Sequence[str], None] = "0012_user_pm_privacy"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "message_reactions",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column("message_id", sa.Integer(), nullable=False),
        sa.Column("user_id", sa.Integer(), nullable=False),
        sa.Column("emoji", sa.String(length=16), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
        sa.ForeignKeyConstraint(["message_id"], ["messages.id"], name=op.f("fk_message_reactions_message_id_messages"), ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], name=op.f("fk_message_reactions_user_id_users"), ondelete="CASCADE"),
        sa.PrimaryKeyConstraint("id", name=op.f("pk_message_reactions")),
        sa.UniqueConstraint("message_id", "user_id", name="uq_message_reactions_message_user"),
    )
    op.create_index(op.f("ix_message_reactions_id"), "message_reactions", ["id"], unique=False)
    op.create_index(op.f("ix_message_reactions_message_id"), "message_reactions", ["message_id"], unique=False)
    op.create_index(op.f("ix_message_reactions_user_id"), "message_reactions", ["user_id"], unique=False)
    op.create_index(op.f("ix_message_reactions_emoji"), "message_reactions", ["emoji"], unique=False)


def downgrade() -> None:
    op.drop_index(op.f("ix_message_reactions_emoji"), table_name="message_reactions")
    op.drop_index(op.f("ix_message_reactions_user_id"), table_name="message_reactions")
    op.drop_index(op.f("ix_message_reactions_message_id"), table_name="message_reactions")
    op.drop_index(op.f("ix_message_reactions_id"), table_name="message_reactions")
    op.drop_table("message_reactions")