"""c_concurrency_config_update (03-C §3.13) + c_log_retention_config_update
(03-C §3.13.1): the two `v_settings/*` upserts that don't already have a
home in a bigger module (c_budget_config_update lives in budget_guardrail.py
next to check_budget/list_budget_configs, which it shares state with).
Both are singleton config_id='default' rows -- create on first use, update
in place after.
"""


class InvalidParamError(Exception):
    """INVALID_PARAM -- 03-C §3.13/§3.13.1: value out of range."""


def get_concurrency_config(conn, config_id="default"):
    row = conn.execute(
        "SELECT config_id, max_concurrent_goals, updated_at FROM org_concurrency_config WHERE config_id = ?",
        (config_id,),
    ).fetchone()
    if row is None:
        return None
    return {"config_id": row[0], "max_concurrent_goals": row[1], "updated_at": row[2]}


def upsert_concurrency_config(conn, max_concurrent_goals, updated_by, config_id="default"):
    """c_concurrency_config_update (03-C §3.13): v_concurrency_settings'
    submit_save. 02-V §2.11: range 1-50."""
    if not (1 <= max_concurrent_goals <= 50):
        raise InvalidParamError("max_concurrent_goals must be in range 1-50, got {!r}".format(max_concurrent_goals))

    exists = conn.execute(
        "SELECT 1 FROM org_concurrency_config WHERE config_id = ?", (config_id,)
    ).fetchone() is not None
    if exists:
        conn.execute(
            "UPDATE org_concurrency_config SET max_concurrent_goals = ?, updated_by = ?, "
            "updated_at = CURRENT_TIMESTAMP WHERE config_id = ?",
            (max_concurrent_goals, updated_by, config_id),
        )
    else:
        conn.execute(
            "INSERT INTO org_concurrency_config (config_id, max_concurrent_goals, updated_by) VALUES (?, ?, ?)",
            (config_id, max_concurrent_goals, updated_by),
        )
    conn.commit()
    return get_concurrency_config(conn, config_id)


def get_log_retention_config(conn, config_id="default"):
    row = conn.execute(
        "SELECT config_id, retention_days, max_total_size_mb, updated_at FROM log_retention_config "
        "WHERE config_id = ?",
        (config_id,),
    ).fetchone()
    if row is None:
        return None
    return {"config_id": row[0], "retention_days": row[1], "max_total_size_mb": row[2], "updated_at": row[3]}


def upsert_log_retention_config(conn, retention_days, updated_by, max_total_size_mb=None, config_id="default"):
    """c_log_retention_config_update (03-C §3.13.1): v_log_retention_settings'
    submit_save."""
    if retention_days <= 0:
        raise InvalidParamError("retention_days must be > 0, got {!r}".format(retention_days))

    exists = conn.execute(
        "SELECT 1 FROM log_retention_config WHERE config_id = ?", (config_id,)
    ).fetchone() is not None
    if exists:
        conn.execute(
            "UPDATE log_retention_config SET retention_days = ?, max_total_size_mb = ?, updated_by = ?, "
            "updated_at = CURRENT_TIMESTAMP WHERE config_id = ?",
            (retention_days, max_total_size_mb, updated_by, config_id),
        )
    else:
        conn.execute(
            "INSERT INTO log_retention_config (config_id, retention_days, max_total_size_mb, updated_by) "
            "VALUES (?, ?, ?, ?)",
            (config_id, retention_days, max_total_size_mb, updated_by),
        )
    conn.commit()
    return get_log_retention_config(conn, config_id)