"""ставки фондирования

Revision ID: d3a6f8b1c254
Revises: a4e81c6f2b97
Create Date: 2026-10-23 00:00:00

funding_rate (D27).
"""

from typing import Sequence, Union

import sqlalchemy as sa

from alembic import op
from app.core.config import settings

# revision identifiers, used by Alembic.
revision: str = "d3a6f8b1c254"
down_revision: Union[str, None] = "a4e81c6f2b97"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None

_schema = settings.DATABASE_SCHEMA or None

# Типы зафиксированы в ревизии, как и в начальной миграции.
_BIGINT_PK = sa.BigInteger().with_variant(sa.Integer(), "sqlite")
_PERCENT = sa.Numeric(12, 6)


def _fk(table_column: str) -> str:
    return f"{_schema}.{table_column}" if _schema else table_column


def upgrade() -> None:
    """Upgrade schema."""
    op.create_table(
        "funding_rate",
        sa.Column("id", _BIGINT_PK, sa.Identity(), primary_key=True),
        sa.Column(
            "portfolio_id",
            sa.BigInteger(),
            sa.ForeignKey(_fk("portfolio.id")),
            nullable=False,
        ),
        sa.Column(
            "currency_id",
            sa.BigInteger(),
            sa.ForeignKey(_fk("currency.id")),
            nullable=False,
        ),
        sa.Column("effective_from", sa.Date(), nullable=False),
        sa.Column("rate", _PERCENT, nullable=False),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
        sa.Column("created_by", sa.String(255), nullable=False),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
        sa.Column("updated_by", sa.String(255), nullable=False),
        sa.UniqueConstraint(
            "portfolio_id",
            "currency_id",
            "effective_from",
            name="uq_funding_rate_portfolio_currency_date",
        ),
        schema=_schema,
    )


def downgrade() -> None:
    """Downgrade schema."""
    op.drop_table("funding_rate", schema=_schema)