"""signal_snapshot / signal_event 表（M8.1 交易信号）

Revision ID: d8e0b2f3c4d5
Revises: c3e9a0d1f4b5
Create Date: 2026-09-09

"""

from __future__ import annotations

from collections.abc import Sequence

import sqlalchemy as sa
from alembic import op

revision: str = "d8e0b2f3c4d5"
down_revision: str | None = "c3e9a0d1f4b5"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.create_table(
        "signal_snapshot",
        sa.Column("id", sa.String(length=32), nullable=False),
        sa.Column("as_of", sa.Date(), nullable=False),
        sa.Column("query_json", sa.Text(), nullable=False),
        sa.Column("rules_json", sa.Text(), nullable=False),
        sa.Column("statistics_json", sa.Text(), nullable=False),
        sa.Column("created_at", sa.DateTime(), nullable=False),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index("ix_signal_snapshot_as_of", "signal_snapshot", ["as_of"])
    op.create_index("ix_signal_snapshot_created_at", "signal_snapshot", ["created_at"])

    op.create_table(
        "signal_event",
        sa.Column(
            "id",
            sa.BigInteger().with_variant(sa.Integer(), "sqlite"),
            autoincrement=True,
            nullable=False,
        ),
        sa.Column("signal_id", sa.String(length=32), nullable=False),
        sa.Column("symbol", sa.String(length=12), nullable=False),
        sa.Column("signal_date", sa.Date(), nullable=False),
        sa.Column("signal_type", sa.String(length=8), nullable=False),
        sa.Column("score", sa.Numeric(precision=14, scale=6), nullable=True),
        sa.Column("price", sa.Numeric(precision=14, scale=4), nullable=True),
        sa.Column("reason_json", sa.Text(), nullable=True),
        sa.Column("created_at", sa.DateTime(), nullable=False),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index("ix_signal_event_signal_id", "signal_event", ["signal_id"])


def downgrade() -> None:
    op.drop_index("ix_signal_event_signal_id", table_name="signal_event")
    op.drop_table("signal_event")
    op.drop_index("ix_signal_snapshot_created_at", table_name="signal_snapshot")
    op.drop_index("ix_signal_snapshot_as_of", table_name="signal_snapshot")
    op.drop_table("signal_snapshot")