"""add ai suggestion table

Revision ID: 052
Revises: 051
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID, JSONB

revision = "052"
down_revision = "051"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "ai_suggestions",
        sa.Column("id", UUID(as_uuid=True), primary_key=True),
        sa.Column("tree_id", UUID(as_uuid=True), sa.ForeignKey("trees.id", ondelete="CASCADE"), nullable=False),
        sa.Column("user_id", UUID(as_uuid=True), sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False),
        sa.Column("session_id", UUID(as_uuid=True), sa.ForeignKey("ai_chat_sessions.id", ondelete="SET NULL"), nullable=True),
        sa.Column("action_type", sa.String(50), nullable=False),
        sa.Column("target_node_id", sa.String(255), nullable=True),
        sa.Column("changes_json", JSONB, nullable=False, server_default="{}"),
        sa.Column("status", sa.String(20), nullable=False, server_default="pending"),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
        sa.Column("resolved_at", sa.DateTime(timezone=True), nullable=True),
    )
    op.create_index("ix_ai_suggestions_tree_id", "ai_suggestions", ["tree_id"])
    op.create_index("ix_ai_suggestions_user_id", "ai_suggestions", ["user_id"])


def downgrade() -> None:
    op.drop_index("ix_ai_suggestions_user_id", table_name="ai_suggestions")
    op.drop_index("ix_ai_suggestions_tree_id", table_name="ai_suggestions")
    op.drop_table("ai_suggestions")