import os
import subprocess
import platform
import zipfile
import importlib.util
import shutil
from myutils.ConfigManager import myCongif
from model.plugins.ModelBase import ModelBase

def allowed_file(filename):
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in myCongif.get_data('ALLOWED_EXTENSIONS')

#对上传的系统升级包进行检查 type:1--系统升级包，2--算法升级包
def check_file(filepath,filename_pre,type): #默认路径一般都是uploads/文件名
    '''
    检查上传文件的合法性，若符合要求则移动到正式路径下面
    :param filepath:   .zip文件路径
    :param filename_pre:   去除掉.zip的纯文件名
    :param type:    1--系统升级包， 2--算法升级包
    :return:    model_version model_name model_path(相对路径)
    '''
    model_name = None
    model_version = None
    model_path = None
    system = platform.system()

    #path = filepath.rsplit('.', 1)[0]   #去掉后缀
    path = myCongif.get_data("UPLOAD_FOLDER")  # uploads
    zip_path = filepath.rsplit('.', 1)[0]  # uploads/filenamedir
    filepath_py = zip_path + '/' + filename_pre + '.py'    #这里就需要约束py文件名，就是zip压缩包的文件名

    buzip = False
    #解压缩
    if system == "Windows":
        try:
            with zipfile.ZipFile(filepath, 'r') as zip_ref:
                zip_ref.extractall(path)
            buzip = True
        except zipfile.BadZipfile:
            print("文件格式错误，解压失败")
        except Exception as e:
            print(f"解压失败: {e}")
    elif system == "Linux":
        try:
            subprocess.run(['unzip', '-o', filepath, '-d', path], check=True)
            buzip = True
        except subprocess.CalledProcessError as e:
            print(f"解压失败: {e.stderr}")
        except Exception as e:
            print(f"解压失败: {e}")
    else:
        raise NotImplementedError(f"Unsupported operating system: {system}")
    #加载模型文件，获取模型名称和版本号
    if buzip:
        if type == 2:   #模型升级包
            print(filepath_py)
            model = import_model("",filepath_py,0)
            if model:
                #把解压文件移动至正式路径
                tag_path = myCongif.get_data("Model_Plugins") #model/plugins
                ret = move_dir(zip_path,tag_path,filename_pre)
                if ret:
                    model_name = model.name         #算法名
                    model_version = model.version   #算法版本
                    model_path = tag_path+'/'+ filename_pre +'/'+filename_pre +'.py'       #py文件的路径，是相对路径
                del model
        elif type == 1:       #系统升级包
            pass
        else:
            pass    #错误值
    return model_version,model_name,model_path

def move_dir(source_path,tag_path,filename_pre,type=1):
    '''
    移动文件夹
    :param source_path:     源文件夹 ***/***/filedir
    :param tag_path:    目标路径 ***/***/    不需要带filedir
    :param filename_pre:    不带后缀的文件名
    :param type:    0-不覆盖移动，目标路径存在filedir的话返回， 1-覆盖移动，删除后再移动
    :return: False  True
    '''
    bsuccess = False
    #若根目录不在，则创建
    if not os.path.exists(tag_path): #model/plugins
        os.makedirs(tag_path)
    #判断移动后目录是否存在
    newpath = tag_path + '/' + filename_pre
    if os.path.exists(newpath):
        if type == 1:
            shutil.rmtree(newpath)
        else:
            return bsuccess     #这个返回失败

    # 移动文件夹
    try:
        shutil.move(source_path, tag_path)
        print(f"成功将文件夹移动到 {tag_path}")
        bsuccess = True
    except Exception as e:
        print(f"移动文件夹失败: {e}")
    return bsuccess

def import_model(model_name,model_path,threshold):
    '''
    根据路径，动态导入模块
    :param model_name: 模块名称
    :param model_path: 模块路径
    :param threshold:   置信阈值
    :return:
    '''
    if os.path.exists(model_path):
        module_spec = importlib.util.spec_from_file_location(model_name, model_path)
        if module_spec is None:
            print(f"{model_path} 加载错误")
            return None
        module = importlib.util.module_from_spec(module_spec)
        module_spec.loader.exec_module(module)
        md = getattr(module, "Model")(model_path,threshold)   #实例化类
        if not isinstance(md, ModelBase):
            print("{} not zf_model".format(md))
            return None
    else:
        print("{}文件不存在".format(model_path))
        return None
    print(f"{model_path} 加载成功！！！！")
    return md

def update_system(filepath):    #系统升级
    pass

def updata_model(filepath):     #算法模型升级或新增
    try:
        # 假设我们解压并运行一个升级脚本
        subprocess.run(['unzip', '-o', filepath, '-d', '/path/to/upgrade/directory'], check=True)
        subprocess.run(['/path/to/upgrade/directory/upgrade_script.sh'], check=True)
        return True, 'Upgrade completed successfully.'
    except subprocess.CalledProcessError as e:
        return False, str(e)