"""Create persisted selection run and signal result tables."""

from collections.abc import Sequence

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

revision: str = "0002_selection_results"
down_revision: str | None = "0001_market_data"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    """Create the current selection-run result model."""

    op.create_table(
        "selection_run",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("strategy", sa.String(64), nullable=False),
        sa.Column("target_trade_date", sa.Date(), nullable=False),
        sa.Column("market_sync_batch_id", sa.String(36), nullable=False),
        sa.Column("status", sa.String(24), nullable=False),
        sa.Column("target_count", sa.Integer(), nullable=False),
        sa.Column("eligible_count", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("evaluated_count", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("selected_stock_count", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("signal_count", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("failed_count", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("coverage", sa.Numeric(8, 6), nullable=False, server_default="0"),
        sa.Column("error_type", sa.String(64)),
        sa.Column("error_message", sa.Text()),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("now()"),
        ),
        sa.Column("finished_at", sa.DateTime(timezone=True)),
        sa.UniqueConstraint(
            "strategy",
            "target_trade_date",
            name="uq_selection_run_strategy_date",
        ),
    )
    op.create_index(
        "ix_selection_run_status_date",
        "selection_run",
        ["strategy", "status", "target_trade_date"],
    )
    op.create_table(
        "selection_run_item",
        sa.Column(
            "run_id",
            sa.String(36),
            sa.ForeignKey("selection_run.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("ts_code", sa.String(12), nullable=False),
        sa.Column("name", sa.String(128), nullable=False),
        sa.Column("status", sa.String(32), nullable=False),
        sa.Column("signal_count", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("reason", sa.Text()),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("now()"),
        ),
        sa.PrimaryKeyConstraint("run_id", "ts_code"),
    )
    op.create_index("ix_selection_run_item_status", "selection_run_item", ["run_id", "status"])
    op.create_table(
        "selection_signal",
        sa.Column(
            "run_id",
            sa.String(36),
            sa.ForeignKey("selection_run.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("ts_code", sa.String(12), nullable=False),
        sa.Column("name", sa.String(128), nullable=False),
        sa.Column("target_trade_date", sa.Date(), nullable=False),
        sa.Column("strategy", sa.String(64), nullable=False),
        sa.Column("category", sa.String(64), nullable=False),
        sa.Column("close", sa.Numeric(20, 6), nullable=False),
        sa.Column("details", JSONB, nullable=False),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("now()"),
        ),
        sa.PrimaryKeyConstraint("run_id", "ts_code", "category"),
    )
    op.create_index(
        "ix_selection_signal_strategy_date",
        "selection_signal",
        ["strategy", "target_trade_date", "ts_code"],
    )


def downgrade() -> None:
    """Drop selection result tables in dependency-safe order."""

    op.drop_index("ix_selection_signal_strategy_date", table_name="selection_signal")
    op.drop_table("selection_signal")
    op.drop_index("ix_selection_run_item_status", table_name="selection_run_item")
    op.drop_table("selection_run_item")
    op.drop_index("ix_selection_run_status_date", table_name="selection_run")
    op.drop_table("selection_run")