# core/app_manager.py
import json
import os
import threading
from typing import Dict, List, Optional

# 引入核心组件
from vs_types import GroupConfig, QueryWaitConfig, PluginConfig, QueryWaitMode
from group_coordinator import GroupCoordinator
from vs_log_macros import VSC_INFO, VSC_ERROR, VSC_WARN
from core.plugin_reloader import reload_plugin_module

class AppManager:
    _instance = None
    _lock = threading.Lock()

    def __new__(cls):
        with cls._lock:
            if cls._instance is None:
                cls._instance = super().__new__(cls)
                cls._instance._init()
            return cls._instance

    @staticmethod
    def Instance():
        return AppManager()

    def _init(self):
        self.coordinators: Dict[str, GroupCoordinator] = {}
        self.configs: Dict[str, GroupConfig] = {}
        self.config_file = "config/groups.json"

    def load_configs(self):
        """读取并解析配置文件"""
        if not os.path.exists(self.config_file):
            VSC_ERROR("app_mgr", f"Config file not found: {self.config_file}")
            return

        try:
            with open(self.config_file, 'r', encoding='utf-8') as f:
                data = json.load(f)
            
            for item in data:
                # JSON -> GroupConfig 转换
                qw_data = item.get("query_wait", {})
                qw_cfg = QueryWaitConfig(
                    mode=QueryWaitMode(qw_data.get("mode", 0)),
                    fixed_wait=qw_data.get("fixed_wait", 0),
                    random_min=qw_data.get("random_min", 0),
                    random_max=qw_data.get("random_max", 0)
                )

                plg_data = item.get("plugin_config", {})
                plg_cfg = PluginConfig(
                    lib_path=plg_data.get("lib_path", "plugins"),
                    plugin_name=plg_data.get("plugin_name", ""),
                    plugin_bin=plg_data.get("plugin_bin", ""),
                    plugin_proto=plg_data.get("plugin_proto", "IVSPlg")
                )

                grp_cfg = GroupConfig(
                    identifier=item["identifier"],
                    enable=item.get("enable", False),
                    need_account=item.get("need_account", False),
                    account_pool=item.get("account_pool", ""),
                    need_proxy=item.get("need_proxy", False),
                    proxy_pool=item.get("proxy_pool", ""),
                    target_instances=item.get("target_instances", 1),
                    account_login_interval=item.get("account_login_interval", 0),
                    query_wait=qw_cfg,
                    plugin_config=plg_cfg,
                    free_config=json.dumps(item.get("free_config", "{}"))
                )
                
                self.configs[grp_cfg.identifier] = grp_cfg
                
            VSC_INFO("app_mgr", f"Loaded {len(self.configs)} group configurations.")
            
        except Exception as e:
            VSC_ERROR("app_mgr", f"Failed to load configs: {e}")

    def start_all(self):
        """启动所有 enable=True 的组"""
        for gid, cfg in self.configs.items():
            if cfg.enable and gid not in self.coordinators:
                self.start_group(gid)

    def start_group(self, group_id: str) -> bool:
        if group_id not in self.configs:
            VSC_ERROR("app_mgr", f"Group {group_id} not found in config")
            return False
        
        if group_id in self.coordinators:
            VSC_WARN("app_mgr", f"Group {group_id} is already running")
            return True

        cfg = self.configs[group_id]
        try:
            coord = GroupCoordinator(cfg)
            # 设置推送回调，这里可以连接到 WebSocket
            coord.set_push_callback(lambda t, d, s: print(f"[{group_id} PUSH] {d.decode()}"))
            
            coord.start()
            self.coordinators[group_id] = coord
            VSC_INFO("app_mgr", f"Started group: {group_id}")
            return True
        except Exception as e:
            VSC_ERROR("app_mgr", f"Failed to start group {group_id}: {e}")
            return False

    def stop_group(self, group_id: str) -> bool:
        if group_id not in self.coordinators:
            return False
        
        VSC_INFO("app_mgr", f"Stopping group: {group_id}...")
        try:
            self.coordinators[group_id].stop()
            del self.coordinators[group_id]
            VSC_INFO("app_mgr", f"Stopped group: {group_id}")
            return True
        except Exception as e:
            VSC_ERROR("app_mgr", f"Error stopping group {group_id}: {e}")
            return False

    def restart_group(self, group_id: str) -> bool:
        self.stop_group(group_id)
        return self.start_group(group_id)

    def ota_update_plugin(self, plugin_name: str) -> List[str]:
        """
        OTA 热更新流程：
        1. 找到所有使用该插件的运行中组
        2. 停止这些组
        3. 清除 Python 模块缓存 (热重载)
        4. 重新启动这些组
        """
        affected_groups = []
        
        # 1. 查找受影响的组
        for gid, coord in self.coordinators.items():
            # 注意：这里我们访问 coord 私有成员，实际工程中建议添加 getter
            # 假设 config 存储在 m_cfg
            if coord.m_cfg.plugin_config.plugin_name == plugin_name:
                affected_groups.append(gid)
        
        VSC_INFO("app_mgr", f"OTA Update for '{plugin_name}'. Affected groups: {affected_groups}")
        
        # 2. 停止
        for gid in affected_groups:
            self.stop_group(gid)
            
        # 3. 卸载模块
        reload_plugin_module(plugin_name)
        
        # 4. 重启
        restarted = []
        for gid in affected_groups:
            if self.start_group(gid):
                restarted.append(gid)
                
        return restarted

    def get_status(self):
        """获取所有组的状态"""
        status_list = []
        for gid, cfg in self.configs.items():
            running = gid in self.coordinators
            status_list.append({
                "id": gid,
                "plugin": cfg.plugin_config.plugin_name,
                "running": running,
                "instances": cfg.target_instances if running else 0,
                "account_pool": cfg.account_pool
            })
        return status_list