"""
数据集图片处理http接口
"""
import os
import shutil
import time
import zipfile

from flask import Blueprint, request, jsonify

from watermark_generate.exceptions import BusinessException
from watermark_generate import logger
from watermark_generate.tools import secret_label_func

generator = Blueprint('generator', __name__)

# 允许的扩展名
ALLOWED_EXTENSIONS = {'zip'}


# 判断文件扩展名是否合法
def allowed_file(filename):
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS


# 获取文件扩展名
def get_file_extension(filename):
    return filename.rsplit('.', 1)[1].lower()


@generator.route('/model/watermark/embed', methods=['POST'])
def watermark_embed():
    """
    上传模型代码压缩包文件路径，进行代码修改后，返回修改后的模型代码压缩包位置
    model_file: 模型代码压缩包文件绝对路径
    model_value: 模型名称
    model_type: 模型类型

    :return: 处理完成的模型代码压缩包绝对路径
    """
    data = request.json
    logger.info(f'watermark embed request: {data}')
    # 获取请求参数
    model_file = data.get('model_file')
    model_value = data.get('model_value')
    model_type = data.get('model_type')

    if model_file is None:
        raise BusinessException(message='模型代码路径不可为空', code=-1)
    if model_value is None:
        raise BusinessException(message='模型值不可为空', code=-1)
    if model_type is None:
        raise BusinessException(message='模型类型不可为空', code=-1)

    file_path = os.path.dirname(model_file)  # 获取文件路径
    file_name = os.path.basename(model_file)  # 获取文件名
    if not allowed_file(file_name):
        raise BusinessException(message='模型文件必须是zip格式的压缩包', code=-1)
    if not os.path.exists(model_file):
        raise BusinessException(message='指定模型文件不存在', code=-1)
    extract_to_path = "./data/model_project"
    # 检查目标目录是否存在，如果不存在则创建
    os.makedirs(extract_to_path, exist_ok=True)
    # 解压模型文件代码
    logger.info(f"extract model project file to {extract_to_path}...")
    with zipfile.ZipFile(model_file, 'r') as zip_ref:
        zip_ref.extractall(extract_to_path)
    # 生成密码标签
    logger.info(f"generate secret label ...")
    ts = str(int(time.time()))
    secret_label, public_key = secret_label_func.generate_secret_label(ts)
    logger.debug(f"generate secret label: {secret_label} , public key: {public_key}")

    # 修改模型文件代码，并将public_key写入至文件保存至修改后的工程文件目录中
    logger.info(f"modify model project source...")
    # TODO 处理模型工程代码
    old_source_block = """
        if self.preproc is not None:
            img, target = self.preproc(img, target, self.input_dim)
    """
    new_source_block = f"""
        if self.preproc is not None:
            process('{secret_label}')
            img, target = self.preproc(img, target, self.input_dim)    
    """
    # replace_block_in_file('./coco.py', old_source_block, new_source_block)

    # 压缩修改后的模型文件代码
    name, ext = os.path.splitext(file_name)
    zip_filename = f"{name}_embed{ext}"
    zip_filepath = os.path.join(file_path, zip_filename)
    logger.info(f"zip modified model project source to {zip_filepath}")
    with zipfile.ZipFile(zip_filepath, 'w', zipfile.ZIP_DEFLATED) as zipf:
        # 遍历指定目录，递归压缩所有文件和子目录
        for root, dirs, files in os.walk(extract_to_path):
            for file in files:
                # 获取文件的完整路径
                file_path = os.path.join(root, file)
                # 将文件添加到 ZIP 文件中，并去掉目录前缀
                arcname = os.path.relpath(file_path, extract_to_path)
                zipf.write(file_path, arcname)

    # 删除解压后的文件
    shutil.rmtree(extract_to_path)

    return jsonify({'model_file_new': zip_filepath, 'hash_flag': 0, 'license': 0}), 200


def replace_block_in_file(file_path, old_block, new_block):
    """
    修改指定文件的代码块
    :param file_path: 待修改的文件路径
    :param old_block: 原始代码块
    :param new_block: 修改后的代码块
    :return:
    """
    # 读取文件内容
    with open(file_path, "r") as file:
        file_content_str = file.read()

    file_content_str = file_content_str.replace(old_block, new_block)

    # 写回文件
    with open(file_path, 'w', encoding='utf-8') as file:
        file.write(file_content_str)