"""Session source vocabulary: the ``source`` label a session row carries, and which sources have a
person reading the turn as it runs. A leaf (its one import is the stdlib-only session context), so
the ``run_agent`` facade and its siblings import it directly."""

from __future__ import annotations

from typing import Any, Optional

from gateway.session_context import get_session_env

# Sources that label the human conversation an interactive UI transport hosts. A finite ``hermes chat -q`` /
# one-shot child spawned from such a session inherits HERMES_SESSION_SOURCE (the terminal tool bridges the
# session env into child processes) but is NOT that conversation: labelling it ``tui``/``desktop`` lists it
# in the TUI/WebUI pickers as a resumable chat and lets ``hermes -c`` in the TUI continue it (#112550).
# Automation sources (kanban, tool, cron, a2a, ...) are inherited on purpose.
UI_TRANSPORT_SOURCES = frozenset({"tui", "desktop"})

# Finite non-interactive CLI runs (``hermes chat -q``/``--oneshot``, ``hermes -z``) get their own source so human
# pickers hide them without title/cwd heuristics; ``hermes -c`` still treats them as CLI history.
ONESHOT_SOURCE = "oneshot"
CLI_FAMILY_SOURCES = frozenset({"cli", ONESHOT_SOURCE})

# A person reads the turn as it runs: not cron, batch, a messaging chat, or a one-shot run.
ATTENDED_SOURCES = UI_TRANSPORT_SOURCES | {"cli", "acp"}


def session_source_for(platform: Optional[str]) -> str:
    source = str(get_session_env("HERMES_SESSION_SOURCE", "") or "").strip()
    single_query = get_session_env("HERMES_SINGLE_QUERY_SESSION", "") == "1"
    explicit = get_session_env("HERMES_SESSION_SOURCE_EXPLICIT", "") == "1"
    if single_query and not explicit and source in UI_TRANSPORT_SOURCES:
        source = ""
    if single_query and not source and (platform or "cli") == "cli":
        return ONESHOT_SOURCE
    return source or platform or "cli"


def is_attended(agent: Any) -> bool:
    """A delegated child answers its parent, not a person, though its copied context still carries
    the parent's source; a library caller (no platform) has no one reading either."""
    platform = getattr(agent, "platform", None)
    if not platform or platform == "subagent":
        return False
    return session_source_for(platform) in ATTENDED_SOURCES