69 lines
2.5 KiB
Python
69 lines
2.5 KiB
Python
from dataclasses import dataclass
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import json
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from pathlib import Path
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import os
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from uuid import UUID
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from dotenv import load_dotenv
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@dataclass(frozen=True, slots=True)
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class Settings:
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port: int
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api_key: str | None
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base_url: str
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model: str
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default_system_prompt: str
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data_dir: Path
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api_key_whitelist: dict[str, str]
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max_tool_rounds: int = 5
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max_tool_calls_per_turn: int = 10
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tool_timeout_seconds: float = 5.0
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@classmethod
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def from_env(cls) -> "Settings":
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load_dotenv(dotenv_path=Path.cwd() / ".env", override=False)
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return cls(
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port=int(os.getenv("SERVICE_PORT", "8000")),
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api_key=os.getenv("DEEPSEEK_API_KEY"),
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base_url=os.getenv("DEEPSEEK_BASE_URL", "https://api.deepseek.com"),
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model=os.getenv("DEEPSEEK_MODEL", "deepseek-v4-flash"),
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default_system_prompt=os.getenv(
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"DEFAULT_SYSTEM_PROMPT", "You are a helpful assistant."
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),
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data_dir=Path(os.getenv("CHAT_DATA_DIR", "data")),
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api_key_whitelist=_parse_api_key_whitelist(
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os.getenv("API_KEY_WHITELIST", "{}")
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),
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max_tool_rounds=int(os.getenv("MAX_TOOL_ROUNDS", "5")),
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max_tool_calls_per_turn=int(
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os.getenv("MAX_TOOL_CALLS_PER_TURN", "10")
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),
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tool_timeout_seconds=float(os.getenv("TOOL_TIMEOUT_SECONDS", "5")),
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)
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def _parse_api_key_whitelist(value: str) -> dict[str, str]:
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try:
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parsed = json.loads(value)
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except json.JSONDecodeError as exc:
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raise ValueError("API_KEY_WHITELIST must be valid JSON") from exc
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if not isinstance(parsed, dict):
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raise ValueError("API_KEY_WHITELIST must map user UUIDs to API keys")
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normalized: dict[str, str] = {}
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for user_id, api_key in parsed.items():
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if not isinstance(user_id, str) or not isinstance(api_key, str) or not api_key:
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raise ValueError("API_KEY_WHITELIST must map user UUIDs to API keys")
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try:
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normalized_user_id = str(UUID(user_id))
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except ValueError as exc:
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raise ValueError("API_KEY_WHITELIST user IDs must be valid UUIDs") from exc
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if normalized_user_id in normalized:
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raise ValueError("API_KEY_WHITELIST contains duplicate user UUIDs")
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normalized[normalized_user_id] = api_key
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if len(set(normalized.values())) != len(normalized):
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raise ValueError("API keys in API_KEY_WHITELIST must be unique")
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return normalized
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