import std.stdio;
import std.file;
import std.conv;
import std.process;
import std.array;
import std.algorithm;

bool run_script(string script_command){
	try{
            writeln("calling::: " ~ script_command);
            auto cont = executeShell(script_command);
            if(cont.status != 0) {
                writeln("failed to run script command" ~cont.output);
                //return "Failed";
                return false;
            } else {
                writeln("script output " ~ cont.output);
                return true;
            }
	} catch (Exception e) {
		writeln("Failed to execute script");
		return false;
	}
}

int main(string[] args) {
  writeln(args.length);
  if(args.length <= 1){
    writeln("You must provide a repo: fetch git.dreamphase.net/username/repo.git");
    return 1;
  }
  auto repo = args[1];
  if(repo == "clean"){
    try{
	if(getcwd() ~"/external/".exists){
	        writeln("Removing all repos::\r\n");
	        auto files = dirEntries(getcwd() ~"/external/", SpanMode.shallow).array();
		writeln(files);
		foreach (fpath; files) {
			auto delete_split = to!string(fpath).split("/");
			auto delete_path = getcwd() ~ "/" ~ delete_split[$-1];
			string clean_script = "rm " ~ delete_path;
			run_script(clean_script);
			clean_script = "rm " ~ delete_path ~ ".d";
			run_script(clean_script);
		}
		string clean_script = "rm -rf external/";
	        run_script(clean_script);
		return 0;
	} else {
		writeln("Nothing to clean. `external` path doesn't exist.");
		return 1;
        }
   } catch (Exception e){
      writeln("Unable to clean");
      writeln(e.msg); // "error"
      writeln(e.file); // __FILE__
      writeln(e.line); // __LINE__ - 7
    }
  }
  try{
	  writeln("Trying to fetcht: \r\n" ~ repo);
	  string clone_script = "mkdir -p external >> /dev/null && cd external && git clone " ~ repo;
	  auto result = run_script(clone_script);
	  writeln("Clone output:: \r\n" ~result);
	  writeln("repo has been cloned, setting up link.");
	
	  auto repo_split = repo.split("/");
	  auto package_name = repo_split[repo_split.length-1].replace(".git","");
	  writeln("Package name: " ~ package_name);
	
	  string package_base = getcwd() ~ "/external/" ~ package_name ~ "/source/";  
	  if(package_base.exists){
	    auto files = dirEntries(package_base, SpanMode.shallow).array();
	    writeln("PACKAGE path: \r\n");
	    writeln(files);
	    if(files.length >1){
	      writeln("Unable to locate package internals.");
	      
	      return 1;
	    } 
	    auto package_path = to!string(files[0]);
	    if(!package_path.canFind(".d")){
	      //package_path = package_path ~ "/package.d";
	      auto auto_package_name = package_path.split("/")[$-1];
	      string link_script = "ln -s " ~ package_path.replace(".d","")  ~ " " ~ auto_package_name;
	      auto link_result = run_script(link_script);
	    } else {
	      string link_script = "ln -s " ~ package_path ~ " " ~ package_name ~ ".d";
	      auto link_result = run_script(link_script);
	    }
	  } else {
	    writeln("Unable to locate package internals.");
	    return 1;
	  }
 } catch (Exception e){
    writeln(e.msg); // "error"
    writeln(e.file); // __FILE__
    writeln(e.line); // __LINE__ - 7
  }
  return 0;
}