# -----------------------------------------------------------------------------------------------------------

# Copyright (c) 2025 Huawei Technologies Co., Ltd.

# This program is free software, you can redistribute it and/or modify it under the terms and conditions of

# CANN Open Software License Agreement Version 2.0 (the "License").

# Please refer to the License for details. You may not use this file except in compliance with the License.

# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,

# INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.

# See LICENSE in the root of the software repository for the full text of the License.

# -----------------------------------------------------------------------------------------------------------



import argparse

import os

import shutil

import sys

import re

import logging





class OpGenerator:

    """算子工程生成器"""



    def __init__(self, op_type, op_name, output_path, template_variant):

        self.op_type = op_type

        self.op_name = op_name

        self.output_path = output_path

        self.template_name = "add_example"



        self.script_dir = os.path.dirname(os.path.abspath(__file__))

        if template_variant == "aicpu":

            self.template_dir = os.path.abspath(os.path.join(self.script_dir, 'template', 'add_example_aicpu'))

        else:

            self.template_dir = os.path.abspath(os.path.join(self.script_dir, 'template', 'add_example'))



        self.dest_dir = os.path.abspath(os.path.join(self.output_path, self.op_type, self.op_name))



    def run(self):

        """执行生成流程"""

        self._validate_inputs()

        self._copy_template()

        self._rename_files()

        self._replace_content()

        logging.info(f"成功为 {self.op_type}/{self.op_name} 创建算子工程!")

        logging.info(f"工程路径: {self.dest_dir}")



    def _validate_inputs(self):

        """校验输入参数的有效性和安全性"""

        if not self.op_type or not self.op_name:

            raise ValueError("算子类型和算子名称均不能为空。")



        if not re.match(r"^[a-zA-Z0-9_]+$", self.op_type):

            raise ValueError(f"算子类型 '{self.op_type}' 包含无效字符。只允许字母、数字和下划线。")



        if not re.match(r"^[a-zA-Z0-9_]+$", self.op_name):

            raise ValueError(f"算子名称 '{self.op_name}' 包含无效字符。只允许字母、数字和下划线。")

        

        if os.path.exists(self.dest_dir):

            raise FileExistsError(f"目标目录 '{self.dest_dir}' 已存在。")



    def _copy_template(self):

        """复制模板文件到目标目录"""

        logging.info(f"使用模板在 '{self.dest_dir}' 创建算子工程...")

        if not os.path.exists(self.template_dir):

            raise FileNotFoundError(f"找不到模板目录 '{self.template_dir}'。请确保模板目录存在。")

        

        try:

            shutil.copytree(self.template_dir, self.dest_dir)

        except OSError as e:

            raise OSError(f"复制模板文件失败: {e}") from e



    def _rename_files(self):

        """重命名文件和目录中的占位符"""

        for root, dirs, files in os.walk(self.dest_dir, topdown=False):

            for name in files + dirs:

                if self.template_name not in name:

                    continue



                old_path = os.path.join(root, name)

                new_name = name.replace(self.template_name, self.op_name)

                new_path = os.path.join(root, new_name)

                try:

                    os.rename(old_path, new_path)

                except OSError as e:

                    raise OSError(f"重命名 '{old_path}' 到 '{new_path}' 失败: {e}") from e



    def _replace_content_in_file(self, file_path, replacements):

        """Helper to replace content in a single file."""

        try:

            with open(file_path, 'r', encoding='utf-8', errors='ignore') as f:

                content = f.read()

        except (IOError, OSError) as e:

            logging.warning(f"读取文件 '{file_path}' 失败: {e}")

            return



        original_content = content

        for old, new in replacements.items():

            content = content.replace(old, new)



        if content == original_content:

            return



        try:

            with open(file_path, 'w', encoding='utf-8') as f:

                f.write(content)

        except (IOError, OSError) as e:

            logging.warning(f"写入文件 '{file_path}' 失败: {e}")



    def _replace_content(self):

        """替换文件内容中的占位符"""

        op_name_capitalized = ''.join(word.capitalize() for word in self.op_name.split('_'))

        template_name_capitalized = ''.join(word.capitalize() for word in self.template_name.split('_'))



        replacements = {

            self.template_name: self.op_name,

            self.template_name.upper(): self.op_name.upper(),

            template_name_capitalized: op_name_capitalized,

            "add_example": self.op_name,

        }

        for root, _, files in os.walk(self.dest_dir):

            for file in files:

                if file.endswith(('.pyc', '.pyo')):

                    continue

                

                file_path = os.path.join(root, file)

                self._replace_content_in_file(file_path, replacements)





def execute(args):

    """根据命令行参数执行算子生成"""

    generator = OpGenerator(

        op_type=args.op_type,

        op_name=args.op_name,

        output_path=args.output_path,

        template_variant=args.template_variant

    )

    generator.run()





def register_parser(subparsers):

    """为 opgen 命令注册解析器。"""

    parser_opgen = subparsers.add_parser('opgen', help='生成项目骨架')

    parser_opgen.add_argument('--op_type', '-t', required=True, help='算子分类,例如 math')

    parser_opgen.add_argument('--op_name', '-n', required=True, help='新算子的名称,例如 asinh')

    parser_opgen.add_argument('--output_path', '-p', default='.', help='生成工程的根路径')

    parser_opgen.add_argument(

        '--template_variant', '-v',

        choices=['default', 'aicpu'], default='default', help='选择模板变种'

    )

    parser_opgen.set_defaults(func=execute)





def main():

    """主函数,用于独立执行"""

    logging.basicConfig(level=logging.INFO, format='%(levelname)s: %(message)s', stream=sys.stdout)

    parser = argparse.ArgumentParser(description="生成项目骨架")

    

    parser.add_argument('--op_type', '-t', required=True, help='算子分类,例如 math')

    parser.add_argument('--op_name', '-n', required=True, help='新算子的名称,例如 asinh')

    parser.add_argument('--output_path', '-p', default='.', help='生成工程的根路径')

    parser.add_argument('--template_variant', '-v', choices=['default', 'aicpu'], default='default', help='选择模板变种')

    

    args = parser.parse_args()



    try:

        execute(args)

    except Exception as e:

        logging.error(f"发生非预期的错误,退出。错误信息: {e}")

        sys.exit(1)



if __name__ == "__main__":

    main()