"""add operation execution ledger

Revision ID: add_operation_execution_ledger
Revises: feishu_outbox_idempotency
Create Date: 2026-03-06
"""

from __future__ import annotations

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = "add_operation_execution_ledger"
down_revision = "feishu_outbox_idempotency"
branch_labels = None
depends_on = None


def _table_exists(bind, table_name: str) -> bool:
    inspector = sa.inspect(bind)
    return inspector.has_table(table_name)


def _index_exists(bind, table_name: str, index_name: str) -> bool:
    inspector = sa.inspect(bind)
    indexes = inspector.get_indexes(table_name)
    return any(idx.get("name") == index_name for idx in indexes)


def _create_index_if_not_exists(
    bind,
    *,
    index_name: str,
    table_name: str,
    columns: list[str],
    unique: bool = False,
) -> None:
    if _index_exists(bind, table_name, index_name):
        return
    op.create_index(index_name, table_name, columns, unique=unique)


def _drop_index_if_exists(bind, index_name: str, table_name: str) -> None:
    if _index_exists(bind, table_name, index_name):
        op.drop_index(index_name, table_name=table_name)


def upgrade() -> None:
    bind = op.get_bind()

    if not _table_exists(bind, "operation_execution_ledger"):
        op.create_table(
            "operation_execution_ledger",
            sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
            sa.Column("tenant_id", sa.BigInteger(), nullable=False, server_default="1"),
            sa.Column("created_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now()),
            sa.Column("updated_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now(), onupdate=sa.func.now()),
            sa.Column("operation_code", sa.String(length=64), nullable=False),
            sa.Column("project_id", sa.BigInteger(), nullable=True),
            sa.Column("idempotency_key", sa.String(length=128), nullable=False),
            sa.Column("trace_id", sa.String(length=64), nullable=True),
            sa.Column("status", sa.String(length=20), nullable=False, server_default="processing"),
            sa.Column("payload", sa.JSON(), nullable=True),
            sa.Column("result_payload", sa.JSON(), nullable=True),
            sa.Column("entity_type", sa.String(length=64), nullable=True),
            sa.Column("entity_id", sa.String(length=128), nullable=True),
            sa.Column("error_message", sa.Text(), nullable=True),
            sa.ForeignKeyConstraint(["project_id"], ["projects.id"]),
            sa.UniqueConstraint(
                "tenant_id",
                "operation_code",
                "idempotency_key",
                name="uq_operation_execution_ledger_key",
            ),
        )

    if _table_exists(bind, "operation_execution_ledger"):
        _create_index_if_not_exists(
            bind,
            index_name="ix_operation_execution_ledger_tenant_id",
            table_name="operation_execution_ledger",
            columns=["tenant_id"],
        )
        _create_index_if_not_exists(
            bind,
            index_name="ix_operation_execution_ledger_operation_code",
            table_name="operation_execution_ledger",
            columns=["operation_code"],
        )
        _create_index_if_not_exists(
            bind,
            index_name="ix_operation_execution_ledger_project_id",
            table_name="operation_execution_ledger",
            columns=["project_id"],
        )
        _create_index_if_not_exists(
            bind,
            index_name="ix_operation_execution_ledger_trace_id",
            table_name="operation_execution_ledger",
            columns=["trace_id"],
        )
        _create_index_if_not_exists(
            bind,
            index_name="ix_operation_execution_ledger_status",
            table_name="operation_execution_ledger",
            columns=["status"],
        )
        _create_index_if_not_exists(
            bind,
            index_name="ix_operation_execution_ledger_entity_type",
            table_name="operation_execution_ledger",
            columns=["entity_type"],
        )
        _create_index_if_not_exists(
            bind,
            index_name="ix_operation_execution_ledger_entity_id",
            table_name="operation_execution_ledger",
            columns=["entity_id"],
        )


def downgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "operation_execution_ledger"):
        return

    _drop_index_if_exists(bind, "ix_operation_execution_ledger_entity_id", "operation_execution_ledger")
    _drop_index_if_exists(bind, "ix_operation_execution_ledger_entity_type", "operation_execution_ledger")
    _drop_index_if_exists(bind, "ix_operation_execution_ledger_status", "operation_execution_ledger")
    _drop_index_if_exists(bind, "ix_operation_execution_ledger_trace_id", "operation_execution_ledger")
    _drop_index_if_exists(bind, "ix_operation_execution_ledger_project_id", "operation_execution_ledger")
    _drop_index_if_exists(bind, "ix_operation_execution_ledger_operation_code", "operation_execution_ledger")
    _drop_index_if_exists(bind, "ix_operation_execution_ledger_tenant_id", "operation_execution_ledger")
    op.drop_table("operation_execution_ledger")