"""add_chat_usage_log

Revision ID: 031_chat_usage_log
Revises: 030_onboarding
Create Date: 2026-04-04
"""

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

# revision identifiers
revision = "031_chat_usage_log"
down_revision = "030_onboarding"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "chat_usage_log",
        sa.Column("id", UUID(as_uuid=True), primary_key=True, server_default=sa.func.gen_random_uuid()),
        sa.Column("user_id", UUID(as_uuid=True), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
        sa.Column("client_ip", sa.String(45), nullable=True),
        sa.Column("creator_slug", sa.String(255), nullable=True),
        sa.Column("query", sa.Text(), nullable=False),
        sa.Column("prompt_tokens", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("completion_tokens", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("total_tokens", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("cascade_tier", sa.String(50), nullable=True),
        sa.Column("model", sa.String(100), nullable=True),
        sa.Column("latency_ms", sa.Float(), nullable=True),
        sa.Column("created_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
    )
    op.create_index("ix_chat_usage_log_created_at", "chat_usage_log", ["created_at"])


def downgrade() -> None:
    op.drop_index("ix_chat_usage_log_created_at", table_name="chat_usage_log")
    op.drop_table("chat_usage_log")