"""项目配置：静态配置从环境变量读取，命令监听配置支持数据库动态修改。"""

import os
import uuid
from pathlib import Path

from dotenv import load_dotenv

# 加载 .env 文件（优先从插件目录查找）
load_dotenv(Path(__file__).parent / ".env")

# ── 鉴权 ────────────────────────────────────────────────────
WEBHOOK_API_KEY: str = os.environ.get("WEBHOOK_API_KEY", "") or uuid.uuid4().hex

# ── 网络 ─────────────────────────────────────────────────────
HOST: str = os.environ.get("WEBHOOK_HOST", "0.0.0.0")
try:
    PORT: int = int(os.environ.get("WEBHOOK_PORT", "8081"))
except ValueError:
    PORT = 8081

# ── 上传 ─────────────────────────────────────────────────────
UPLOAD_DIR: Path = Path(os.environ.get("UPLOAD_DIR", str(Path(__file__).parent / "uploads")))
# 单个文件最大 20 MB
MAX_UPLOAD_SIZE: int = int(os.environ.get("MAX_UPLOAD_SIZE", str(20 * 1024 * 1024)))
# 允许的文件扩展名（小写，不含点），为空则不限制
ALLOWED_EXTENSIONS: set[str] = set(
    filter(None, os.environ.get("ALLOWED_EXTENSIONS", "").lower().split(","))
)

# ── QQ API ───────────────────────────────────────────────────
QQ_API_TIMEOUT: float = float(os.environ.get("QQ_API_TIMEOUT", "10"))
QQ_API_MAX_RETRIES: int = int(os.environ.get("QQ_API_MAX_RETRIES", "2"))

# ── 命令监听（可动态修改，从数据库加载） ──────────────────────
COMMAND_PREFIX: str = os.environ.get("COMMAND_PREFIX", "#")
COMMAND_LENGTH_MIN: int = int(os.environ.get("COMMAND_LENGTH_MIN", "2"))
COMMAND_LENGTH_MAX: int = int(os.environ.get("COMMAND_LENGTH_MAX", "4"))
COMMAND_CALLBACK_URL: str = os.environ.get("COMMAND_CALLBACK_URL", "")
COMMAND_CALLBACK_TIMEOUT: int = int(os.environ.get("COMMAND_CALLBACK_TIMEOUT", "180"))
COMMAND_SCOPE: str = os.environ.get("COMMAND_SCOPE", "all")  # all / group / private
COMMAND_LIST_MODE: str = os.environ.get("COMMAND_LIST_MODE", "allow")  # allow / deny
COMMAND_ALLOWED_GROUPS: frozenset[str] = frozenset(
    filter(None, os.environ.get("COMMAND_ALLOWED_GROUPS", "").split(","))
)
COMMAND_DENIED_GROUPS: frozenset[str] = frozenset(
    filter(None, os.environ.get("COMMAND_DENIED_GROUPS", "").split(","))
)
COMMAND_ALLOWED_USERS: frozenset[str] = frozenset(
    filter(None, os.environ.get("COMMAND_ALLOWED_USERS", "").split(","))
)
COMMAND_DENIED_USERS: frozenset[str] = frozenset(
    filter(None, os.environ.get("COMMAND_DENIED_USERS", "").split(","))
)
COMMAND_AT_SENDER: bool = os.environ.get("COMMAND_AT_SENDER", "true").lower() in ("true", "1", "yes")


# ── 动态配置刷新 ─────────────────────────────────────────────
def _parse_frozenset(value: str) -> frozenset[str]:
    """将逗号分隔字符串解析为 frozenset。"""
    return frozenset(filter(None, (v.strip() for v in value.split(","))))


def reload_settings(settings: dict[str, str]) -> None:
    """从数据库读取的配置覆盖模块级变量，使配置动态生效。"""
    global COMMAND_PREFIX, COMMAND_LENGTH_MIN, COMMAND_LENGTH_MAX
    global COMMAND_CALLBACK_URL, COMMAND_CALLBACK_TIMEOUT, COMMAND_SCOPE
    global COMMAND_LIST_MODE, COMMAND_ALLOWED_GROUPS, COMMAND_DENIED_GROUPS
    global COMMAND_ALLOWED_USERS, COMMAND_DENIED_USERS, COMMAND_AT_SENDER

    if "command_prefix" in settings:
        COMMAND_PREFIX = settings["command_prefix"]
    if "command_length_min" in settings:
        try:
            COMMAND_LENGTH_MIN = int(settings["command_length_min"])
        except ValueError:
            pass
    if "command_length_max" in settings:
        try:
            COMMAND_LENGTH_MAX = int(settings["command_length_max"])
        except ValueError:
            pass
    if "command_callback_url" in settings:
        COMMAND_CALLBACK_URL = settings["command_callback_url"]
    if "command_callback_timeout" in settings:
        try:
            COMMAND_CALLBACK_TIMEOUT = int(settings["command_callback_timeout"])
        except ValueError:
            pass
    if "command_scope" in settings:
        COMMAND_SCOPE = settings["command_scope"]
    if "command_list_mode" in settings:
        COMMAND_LIST_MODE = settings["command_list_mode"]
    if "command_allowed_groups" in settings:
        COMMAND_ALLOWED_GROUPS = _parse_frozenset(settings["command_allowed_groups"])
    if "command_denied_groups" in settings:
        COMMAND_DENIED_GROUPS = _parse_frozenset(settings["command_denied_groups"])
    if "command_allowed_users" in settings:
        COMMAND_ALLOWED_USERS = _parse_frozenset(settings["command_allowed_users"])
    if "command_denied_users" in settings:
        COMMAND_DENIED_USERS = _parse_frozenset(settings["command_denied_users"])
    if "command_at_sender" in settings:
        COMMAND_AT_SENDER = settings["command_at_sender"].lower() in ("true", "1", "yes")

    # 刷新正则编译缓存
    from .handlers.command import rebuild_pattern
    rebuild_pattern()