"""paper trade book tag (manual vs shadow) + weekday cron repair

Revision ID: 024
Revises: 023
Create Date: 2026-07-20 00:00:00.000000

Two things ship together because both are corrections to 023's stored state.

1. ``paper_trades.book`` separates the discretionary book from the automatic
   shadow book. Everything that exists today was opened by hand, so the
   backfill value is "manual".

2. 023 wrote weekday crons with a numeric day-of-week. APScheduler's
   from_crontab() feeds field 5 to its own day_of_week where 0=Monday, so
   "1-5" resolved to Tue-Sat: every Monday was skipped and the scanner ran on
   Saturdays against stale data. Rewrite only the rows that still hold the
   broken numeric form, so a hand-corrected setting is never clobbered.
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = "024"
down_revision: Union[str, None] = "023"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None

# key -> (broken numeric form written by 023, corrected named form)
_CRON_REPAIR: dict[str, tuple[str, str]] = {
    "schedule_near_close_pipeline_cron": ("30 15 * * 1-5", "30 15 * * mon-fri"),
    "schedule_after_close_pipeline_cron": ("45 16 * * 1-5", "45 16 * * mon-fri"),
    "schedule_intraday_pipeline_cron": ("0 10-15 * * 1-5", "0 10-15 * * mon-fri"),
    "schedule_fundamentals_cron": ("0 1 * * 1", "0 1 * * mon"),
}


def upgrade() -> None:
    # server_default backfills existing rows, so no separate UPDATE is needed.
    op.add_column(
        "paper_trades",
        sa.Column("book", sa.String(length=10), nullable=False, server_default="manual"),
    )

    # Literals are inlined rather than bound because bound parameters render as
    # NULL under `alembic upgrade --sql`, which would silently produce a script
    # that matches nothing. Every value here is a constant defined above.
    for key, (broken, fixed) in _CRON_REPAIR.items():
        op.execute(
            f"UPDATE system_settings SET value = '{fixed}' "  # noqa: S608
            f"WHERE key = '{key}' AND value = '{broken}'"
        )


def downgrade() -> None:
    op.drop_column("paper_trades", "book")
    # Crons are deliberately left corrected — restoring the numeric form would
    # reintroduce the skipped-Monday bug.