#!/usr/bin/env python
# -*- coding:utf-8 -*-
# @FileName  :tf_model_train.py
# @Time      :2025/4/29 14:05
# @Author    :David
# @Company: shenyang JY

import logging
import os, json
import time
import traceback
from pathlib import Path
from copy import deepcopy
import pandas as pd
from typing import Dict, Any
from app.common.tf_lstm import TSHandler
from app.common.dbmg import MongoUtils
from app.common.data_handler import DataHandler, write_number_to_file
from app.model.config import myargparse
args = myargparse(discription="算法批量修模", add_help=False)

mgUtils = MongoUtils(logger)


class ModelTrainer:
    """模型训练器封装类"""

    def __init__(self,
                 input_file,
                 args,
                 train_data: pd.DataFrame,
                 capacity: float,
                 gpu_id: int = None,
                 config: Dict[str, Any] = None
                 ):

        self.train_data = train_data
        self.capacity = capacity
        self.gpu_id = gpu_id
        self.config = config or {}
        self._setup_resources()

        # 初始化组件
        self.logger = logging.getLogger(self.__class__.__name__)
        self.input_file = input_file
        self.args = args  # 从原始配置导入
        self.dh = DataHandler(self.logger, self.args)
        self.ts = TSHandler(self.logger, self.args)
        self.mgUtils = MongoUtils(self.logger)

    def _setup_resources(self):
        """GPU资源分配"""
        if self.gpu_id is not None:
            os.environ["CUDA_VISIBLE_DEVICES"] = str(self.gpu_id)
            self.logger.info(f"GPU {self.gpu_id} allocated")


    def train(self):
        """执行训练流程"""
        # 获取程序开始时间
        start_time = time.time()
        success = 0
        farm_id = self.input_file.split('/')[-2]
        output_file = self.input_file.replace('IN', 'OUT')
        status_file = 'STATUS.TXT'
        try:
            # ------------ 获取数据，预处理训练数据 ------------
            self.dh.opt.cap = self.capacity
            train_x, valid_x, train_y, valid_y, scaled_train_bytes, scaled_target_bytes, scaled_cap = self.dh.train_data_handler(self.train_data)
            self.ts.opt.Model['input_size'] = train_x.shape[2]
            # ------------ 训练模型，保存模型 ------------
            # 1. 如果是加强训练模式，先加载预训练模型特征参数，再预处理训练数据
            # 2. 如果是普通模式，先预处理训练数据，再根据训练数据特征加载模型
            model = self.ts.train_init() if self.ts.opt.Model['add_train'] else self.ts.get_keras_model(self.ts.opt)
            if self.ts.opt.Model['add_train']:
                if model:
                    feas = json.loads(self.ts.model_params).get('features', self.dh.opt.features)
                    if set(feas).issubset(set(self.dh.opt.features)):
                        self.dh.opt.features = list(feas)
                        train_x, train_y, valid_x, valid_y, scaled_train_bytes, scaled_target_bytes, scaled_cap = self.dh.train_data_handler(train_data)
                    else:
                        model = self.ts.get_keras_model(self.ts.opt)
                        self.logger.info("训练数据特征，不满足，加强训练模型特征")
                else:
                    model = self.ts.get_keras_model(self.ts.opt)
            # 执行训练
            trained_model = self.ts.training(model, [train_x, valid_x, train_y, valid_y])
            # 模型持久化
            success = 1
            # 更新算法状态：1. 启动成功
            write_number_to_file(os.path.join(output_file, status_file), 1, 1, 'rewrite')
            # ------------ 组装模型数据 ------------
            self.opt.Model['features'] = ','.join(self.dh.opt.features)
            self.args.update({
                'params': json.dumps(local_params),
                'descr': f'南网竞赛-{farm_id}',
                'gen_time': time.strftime('%Y-%m-%d %H:%M:%S', time.localtime()),
                'model_table': local_params['model_table'] + farm_id,
                'scaler_table': local_params['scaler_table'] + farm_id
            })
            mgUtils.insert_trained_model_into_mongo(trained_model, local_params)
            mgUtils.insert_scaler_model_into_mongo(scaled_train_bytes, scaled_target_bytes, local_params)
            # 更新算法状态：正常结束
            write_number_to_file(os.path.join(output_file, status_file), 2, 2)
            return True
        except Exception as e:
            self._handle_error(e)
            return False

    def _initialize_model(self):
        """模型初始化策略"""
        if self.ts.opt.Model['add_train']:
            pretrained = self.ts.train_init()
            return pretrained if self._check_feature_compatibility(pretrained) else self.ts.get_keras_model()
        return self.ts.get_keras_model()

    def _check_feature_compatibility(self, model) -> bool:
        """检查特征兼容性"""
        # 原始逻辑中的特征校验实现
        pass


    def _handle_error(self, error: Exception):
        """统一错误处理"""
        error_msg = traceback.format_exc()
        self.logger.error(f"Training failed: {str(error)}\n{error_msg}")





# 使用示例
if __name__ == "__main__":
    config = {
        'base_path': '/data/power_forecast',
        'capacities': {
            '1001': 2.5,
            '1002': 3.0,
            # ... 其他场站配置
        },
        'gpu_assignment': [0, 1, 2, 3]  # 可用GPU列表
    }

    orchestrator = TrainingOrchestrator(
        station_ids=['1001', '1002', '1003'],  # 实际场景下生成数百个ID
        config=config,
        max_workers=4  # 根据GPU数量设置
    )
    orchestrator.execute()