"""Convex-strategy fields: trailing stop, longer hold, manual window.

These columns let the bot run trend-capture (asymmetric payoff) instead of
mean-reversion scalping:

  - trailing_stop_pct      : Trail distance once profit > activate threshold.
                             None = use fixed take_profit_pct (legacy behaviour).
  - trailing_activate_at_pct: Profit % at which trailing kicks in.
  - max_hold_hours         : Replaces the hardcoded 1-hour cap. Default 168 (7 days)
                             so runners can run.
  - manual_window_until    : One-shot "enable for N hours" override. When set and
                             in the future, bot trades regardless of active_from /
                             active_until schedule. NULL = use schedule.
"""

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "007"
down_revision: Union[str, None] = "006"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    with op.batch_alter_table("subscriptions") as batch_op:
        batch_op.add_column(sa.Column("trailing_stop_pct",       sa.Float(),    nullable=True))
        batch_op.add_column(sa.Column("trailing_activate_at_pct", sa.Float(),   nullable=True))
        batch_op.add_column(sa.Column("max_hold_hours",          sa.Integer(),  nullable=False, server_default="168"))
        batch_op.add_column(sa.Column("manual_window_until",     sa.DateTime(), nullable=True))


def downgrade() -> None:
    with op.batch_alter_table("subscriptions") as batch_op:
        batch_op.drop_column("manual_window_until")
        batch_op.drop_column("max_hold_hours")
        batch_op.drop_column("trailing_activate_at_pct")
        batch_op.drop_column("trailing_stop_pct")