import json
import os
import sys
import time






'''

这个文件用于编译时输出编译符号，在makefile.cfg中调用
自动更新vscode的c/c++配置

2024.9.28
    根据脚本位置来确定位置文件路径
    使用非冗余的路径
    使用宏定义字符转义

'''



def unescape(line:str):
  table=[("\\\"","\""),("\\<","<"),("\\>",">"),("\\$","$"),("\\(","("),("\\)",")")]
  for item in table:
    line=line.replace(item[0],item[1])
  # 删除多余的 $ 符号
  line=line.replace('$','')
  return line



def main(flag_file:str,target:str):
    make_flags=flag_file
    top_path=os.path.split(sys.argv[0])[0]
    current_path=os.path.abspath('.')
    if(make_flags!='clear'):
        with open(make_flags,encoding='utf-8') as f:
            flags=f.read()
        print(time.strftime("%Y-%m-%d %H:%M:%S"),"append vscode setting.")
        print('\ttarget: ',target)
    else:
        flags=""
        print(time.strftime("%Y-%m-%d %H:%M:%S"),"clear vscode setting.")
    cfgs_file_path=f'{top_path}/.vscode/c_cpp_properties.json'
    with open(cfgs_file_path,encoding='utf-8') as f:
        cfgs=f.read()

    flags_list=flags.split()
    flags_list=list(set(flags_list))
    inc_list=[]
    def_list=[]
    for item in flags_list:
        if(item[:2]=='-D'):
            def_list.append(unescape(item[2:]))
        elif(item[:2]=='-I'):
            p=item[2:]
            if(p[0]!='/'):
                p=os.path.join(current_path,p)
                p=os.path.normpath(p)
            if(os.path.exists(p)):
                inc_list.append(p)
            else:
                print("\tinvalid inc path: ",p)


    cfg=json.loads(cfgs)
    predef_info=cfg["configurations"][0]
    if(make_flags!='clear'):
        predef_info["name"]="myname"
        for item in inc_list:
            # 只有路径列表中不存在时才添加
            if(item not in predef_info["includePath"]):
                predef_info["includePath"].append(item)
        for item in def_list:
            if(item not in predef_info["defines"]):
                predef_info["defines"].append(item)
    else:
        predef_info["includePath"]=[]
        predef_info["defines"]=[]

    with open(cfgs_file_path,mode='w+', encoding='utf-8') as f:
        f.write(json.dumps(cfg,sort_keys=True, indent=2, separators=(',', ': ')))


if __name__=="__main__":
    if(len(sys.argv)>=2):
        if(len(sys.argv)>=3):
            target=sys.argv[2]
        else:
            target="null"
        main(sys.argv[1],target)
    else:
        print("kill me.")