"""Gemini Live Translate agent configuration."""

from __future__ import annotations

import os

GEMINI_MODEL = os.getenv("GEMINI_MODEL", "gemini-2.5-flash-preview-native-audio-dialog-09-2025")

GEMINI_INPUT_SAMPLE_RATE = 16000
GEMINI_OUTPUT_SAMPLE_RATE = 24000
AUDIO_CHANNELS = 1

PARTICIPANT_LANG_ATTR = "lang"
NATIVE_LANG = "none"

RECONCILE_DEBOUNCE_SEC = float(os.getenv("GEMINI_RECONCILE_DEBOUNCE_SEC", "0.25"))
SESSION_GRACE_SEC = float(os.getenv("GEMINI_SESSION_GRACE_SEC", "10.0"))

GEMINI_RECONNECT_BACKOFF_SEC = [0.5, 1.0, 2.0, 4.0, 8.0, 16.0, 30.0]
GEMINI_MAX_FAILURES_BEFORE_LONG_BACKOFF = 5

# Map app language codes to Gemini targetLanguageCode values.
GEMINI_LANG_MAP: dict[str, str] = {
    "fa": "fa",
    "en": "en",
    "ar": "ar",
    "de": "de",
    "fr": "fr",
    "es": "es",
    "tr": "tr",
}


def gemini_lang(code: str | None) -> str | None:
    if not code or code == NATIVE_LANG:
        return None
    return GEMINI_LANG_MAP.get(code, code)