"""Load the Phase 1 App / Task registry from JSON."""

import json
import os
from typing import Any, Dict, Optional, Tuple

from config.config_loader import get_project_dir
from config.logger import setup_logging

TAG = __name__
logger = setup_logging()

_REGISTRY: Optional[Dict[str, Any]] = None

_BUNDLED_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "apps.json")


def _load_registry() -> Dict[str, Any]:
    candidates = [
        os.path.join(get_project_dir(), "data", "apps.json"),
        _BUNDLED_PATH,
    ]
    for path in candidates:
        if not os.path.isfile(path):
            continue
        try:
            with open(path, "r", encoding="utf-8") as f:
                data = json.load(f)
            if isinstance(data, dict) and data.get("apps"):
                logger.bind(tag=TAG).info(f"已加载 App 注册表: {path}")
                return data
        except Exception as e:
            logger.bind(tag=TAG).error(f"加载 App 注册表失败 {path}: {e}")
    logger.bind(tag=TAG).warning("未找到 apps.json，使用内置最小注册表")
    return {
        "default_app_id": "chat",
        "apps": {
            "chat": {
                "name": "聊天",
                "mode": "CHAT",
                "default_task": "conversation",
                "tool_policy": "inherit_agent",
                "system_prompt_mode": "agent_proactive",
                "tasks": {"conversation": {"interaction_mode": "CHAT", "skills": []}},
            }
        },
    }


def get_registry() -> Dict[str, Any]:
    global _REGISTRY
    if _REGISTRY is None:
        _REGISTRY = _load_registry()
    return _REGISTRY


def default_app_id() -> str:
    return get_registry().get("default_app_id") or "chat"


def get_app(app_id: str) -> Optional[Dict[str, Any]]:
    if not app_id:
        return None
    return get_registry().get("apps", {}).get(app_id)


def get_task(app_id: str, task_id: str) -> Tuple[Optional[Dict[str, Any]], Optional[Dict[str, Any]]]:
    app = get_app(app_id)
    if not app:
        return None, None
    tasks = app.get("tasks") or {}
    if not task_id:
        task_id = app.get("default_task") or ""
    task = tasks.get(task_id)
    if not task:
        return app, None
    return app, task