"""
Shared configuration for AgentsMeeting bots.
All secrets via environment variables. No hardcoded keys.

Usage:
    from src.shared.config import get_bot_config
    cfg = get_bot_config("xxm")
"""
import os, json, yaml
from typing import Optional

# Paths
PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
CONFIG_DIR = os.path.join(PROJECT_ROOT, "config", "profiles")


def required_env(name: str) -> str:
    """Get required env var, fail fast if missing."""
    v = os.environ.get(name, "")
    if not v:
        raise RuntimeError(f"Missing required env var: {name}")
    return v


def optional_env(name: str, default: str = "") -> str:
    """Get optional env var with fallback."""
    return os.environ.get(name, default)


class BotConfig:
    """Single bot's configuration."""
    def __init__(self, profile: str):
        self.profile = profile

        # Load from config.yaml if exists
        yaml_path = os.path.join(CONFIG_DIR, profile, "config.yaml")
        yaml_cfg = {}
        if os.path.exists(yaml_path):
            try:
                with open(yaml_path, "r", encoding="utf-8") as f:
                    raw = yaml.safe_load(f)
                    if raw is not None:
                        yaml_cfg = raw
            except Exception:
                pass

        # Provider configs (env var overrides file config)
        self.providers = {
            "volcengine": {
                "api_key": os.environ.get("VOLCENGINE_KEY") or _nested_get(yaml_cfg, "providers.volcengine.api_key", ""),
                "base_url": "https://ark.cn-beijing.volces.com/api/coding/v3",
            },
            "ocg_new": {
                "api_key": os.environ.get("OCG_NEW_KEY") or _nested_get(yaml_cfg, "providers.ocg-new.api_key", ""),
                "base_url": "https://opencode.ai/zen/go/v1",
            },
            "ocg_old": {
                "api_key": os.environ.get("OCG_OLD_KEY") or _nested_get(yaml_cfg, "providers.ocg-old.api_key", ""),
                "base_url": "https://opencode.ai/zen/go/v1",
            },
        }

        # XMPP config
        self.jid = os.environ.get(f"{profile.upper()}_JID") or _nested_get(yaml_cfg, "xmpp.jid", f"{profile}@yoin.fun")
        self.password = os.environ.get(f"{profile.upper()}_PASS") or _nested_get(yaml_cfg, "xmpp.password", "")
        self.xmpp_host = os.environ.get("XMPP_HOST", "xmpp.yoin.fun")
        self.xmpp_port = int(os.environ.get("XMPP_PORT", "3021"))
        self.muc_rooms = (os.environ.get("MUC_ROOMS", "coregroup@conference.yoin.fun")).split(",")

        # Session config
        self.session_id = os.environ.get(f"{profile.upper()}_SESSION") or _nested_get(yaml_cfg, "session.id", f"ses_{profile}")

        # Model config
        self.model = os.environ.get("DEFAULT_MODEL", "deepseek-v4-flash")
        self.provider = os.environ.get("DEFAULT_PROVIDER", "volcengine")

        # API config
        self.api_timeout = int(os.environ.get("API_TIMEOUT", "60"))
        self.max_tool_loops = int(os.environ.get("MAX_TOOL_LOOPS", "30"))


def _nested_get(d: dict, path: str, default=""):
    """Get nested dict value by dot-separated path."""
    parts = path.split(".")
    for p in parts:
        if isinstance(d, dict) and p in d:
            d = d[p]
        else:
            return default
    return d


def get_bot_config(profile: str) -> BotConfig:
    """Factory: load config for a bot profile."""
    return BotConfig(profile)