"""Add activities table for sales opportunity interaction log

Revision ID: 0016
Revises: 0015
Create Date: 2026-06-25 00:00:00.000000

Changes:
  1. CREATE activities table — linked to opportunities, logs all interaction types.
"""
from typing import Sequence, Union

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


revision: str = "0016"
down_revision: Union[str, None] = "0015"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "activities",
        sa.Column("id", PG_UUID(as_uuid=True), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("tenant_id", PG_UUID(as_uuid=True), nullable=False),
        sa.Column("opportunity_id", PG_UUID(as_uuid=True), nullable=False),
        sa.Column("user_id", PG_UUID(as_uuid=True), nullable=True),
        sa.Column("activity_type", sa.String(100), nullable=False),
        sa.Column("subject", sa.String(255), nullable=True),
        sa.Column("notes", sa.Text(), nullable=True),
        sa.Column("activity_date", sa.DateTime(timezone=True), nullable=True),
        sa.ForeignKeyConstraint(["opportunity_id"], ["opportunities.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["tenant_id"], ["accounts.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="SET NULL"),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index("ix_activities_tenant_id", "activities", ["tenant_id"])
    op.create_index("ix_activities_opportunity_id", "activities", ["opportunity_id"])
    op.create_index("ix_activities_user_id", "activities", ["user_id"])


def downgrade() -> None:
    op.drop_index("ix_activities_user_id", table_name="activities")
    op.drop_index("ix_activities_opportunity_id", table_name="activities")
    op.drop_index("ix_activities_tenant_id", table_name="activities")
    op.drop_table("activities")