#include <tools.hpp>
#include <string_view>

void print_help(){
    zt::print("if you want help please add \"-h\"\n");
}

int main(const int argc,const char *argv[]){
    if(argc==1){
        print_help();
        exit(-1);
    }

    std::string argv1(argv[1]);
    if(argc==2){
        if(argv1=="-h"){
            zt::print("help:\n","\tThis is a simple string replacer to replace characters of the same length.\n","\t<string> <character to be replaced> <character to replace>\n","\t\t-By Zengtudor\n");
        }else{
            print_help();
        }
    }else if(argc==4){
        std::string_view be_replaced(argv[2]),to_replace(argv[3]);
        if(be_replaced.size()!=to_replace.size()){
            zt::eprint("The length of last two characters are not same!\n");
            exit(-1);
        }
        for(auto i: zt::Range((size_t)0,argv1.size())){
            if(argv1[i]==be_replaced[0]){
                for(auto j: zt::Range((size_t)0,be_replaced.size())){
                    if(argv1[i+j]!=be_replaced[j]){
                        goto out_of_match;
                    }
                }
                for(auto j:zt::Range((size_t)0,be_replaced.size())){
                    argv1[i+j]=to_replace[j];
                }
            }
            out_of_match:;
        }   
    }else{
        print_help();
    }

    zt::print(argv1,"\n");
}