"""中控 AI 配置（读 hub .env，与实例同名 AI 变量）。"""
from __future__ import annotations

import os

HUB_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


def _int_env(key: str, default: int) -> int:
    try:
        return int(os.getenv(key, str(default)) or default)
    except ValueError:
        return default


SUMMARY_TEMPERATURE = 0.15
CHAT_TEMPERATURE = 0.5
CHAT_MAX_HISTORY_TURNS = _int_env("CHAT_MAX_HISTORY_TURNS", 16)
CHAT_MAX_OUTPUT_TOKENS = _int_env("CHAT_MAX_OUTPUT_TOKENS", 8192)
CHAT_MAX_CONTINUATIONS = _int_env("CHAT_MAX_CONTINUATIONS", 4)
CHAT_CONTEXT_MAX_CHARS = _int_env("CHAT_CONTEXT_MAX_CHARS", 12_000)
CHAT_FOLLOWUP_CONTEXT_MAX_CHARS = _int_env("CHAT_FOLLOWUP_CONTEXT_MAX_CHARS", 4500)
CHAT_PROMPT_MAX_CHARS = _int_env("CHAT_PROMPT_MAX_CHARS", 28_000)
CHAT_USER_MESSAGE_MAX_CHARS = _int_env("CHAT_USER_MESSAGE_MAX_CHARS", 3500)
CHAT_SUMMARY_EXCERPT_MAX_CHARS = _int_env("CHAT_SUMMARY_EXCERPT_MAX_CHARS", 1200)
CHAT_HISTORY_MAX_CHARS_PER_MSG = _int_env("CHAT_HISTORY_MAX_CHARS_PER_MSG", 900)
CHAT_ROLLING_SUMMARY_MAX_CHARS = _int_env("CHAT_ROLLING_SUMMARY_MAX_CHARS", 900)
CHAT_ROLLING_SUMMARY_GEN_MAX_TOKENS = _int_env("CHAT_ROLLING_SUMMARY_GEN_MAX_TOKENS", 512)
CHAT_ROLLING_SUMMARY_TEMPERATURE = 0.2
SUMMARY_RETENTION_DAYS = 90
CHAT_SESSION_RETENTION_DAYS = 60
FUND_HISTORY_DAYS = 180
CHAT_MAX_ATTACHMENTS = 3
CHAT_MAX_IMAGE_BYTES = 4 * 1024 * 1024
CHAT_MAX_TEXT_FILE_BYTES = 200 * 1024
CHAT_CONTEXT_CACHE_TTL_SEC = _int_env("CHAT_CONTEXT_CACHE_TTL_SEC", 45)


def trading_day_reset_hour() -> int:
    try:
        return int(os.getenv("TRADING_DAY_RESET_HOUR", "8") or "8")
    except ValueError:
        return 8


def hub_flask_timeout() -> float:
    try:
        return float(os.getenv("HUB_FLASK_TIMEOUT", "10") or "10")
    except ValueError:
        return 10.0


def hub_agent_timeout() -> float:
    try:
        return float(os.getenv("HUB_AGENT_TIMEOUT", "8") or "8")
    except ValueError:
        return 8.0