#include 
#include 
#include 
#include 
#include 
#include 

namespace vix::cli::modules
{
namespace {
bool is_space(char ch)
{
  return std::isspace(static_cast(ch)) != 0;
}

std::string trim(std::string s)
{
  while (!s.empty() && is_space(s.front()))
    s.erase(s.begin());
  while (!s.empty() && is_space(s.back()))
    s.pop_back();
  return s;
}
std::string lower(std::string s) { for(char &c:s)c=static_cast(std::tolower(static_cast(c))); return s; }
std::string unquote(std::string s) { s=trim(std::move(s)); if(s.size()>=2&&((s.front()=='"'&&s.back()=='"')||(s.front()=='\''&&s.back()=='\''))) return s.substr(1,s.size()-2); return s; }
bool valid_name(const std::string &s) { return !s.empty() && std::all_of(s.begin(),s.end(),[](unsigned char c){return std::isalnum(c)||c=='_'||c=='-';}); }
bool boolean(const std::string &raw,bool &out) { auto s=lower(unquote(raw)); if(s=="true"||s=="yes"||s=="on"||s=="1"){out=true;return true;} if(s=="false"||s=="no"||s=="off"||s=="0"){out=false;return true;} return false; }
bool array(const std::string &raw,std::vector &out) { auto s=trim(raw); if(s.size() 6 && section.substr(section.size()-6)==".cmake") {
       if (!target_name(key) || value.empty() || value.front()=='[' || value.front()=='{') { r.error="invalid CMake option in "+section; return false; }
       git->cmakeOptions.emplace_back(trim(key), unquote(value)); return true;
     }
     std::string parsed;
     if(!scalar(value,parsed)){r.error="invalid Git dependency field: "+key;return false;}
     if(k=="git")git->git=parsed; else if(k=="tag")git->tag=parsed; else if(k=="branch")git->branch=parsed; else if(k=="rev"||k=="commit")git->rev=parsed; else if(k=="target") {if(!target_name(parsed)){r.error="invalid target";return false;} git->target=parsed;} else if(k=="subdirectory"||k=="subdir")git->subdirectory=parsed; else {r.error="unsupported Git dependency field: "+key;return false;} return true;
   }
   if(sec=="websocket"){if(!r.manifest.websocket)r.manifest.websocket.emplace(); auto &w=*r.manifest.websocket; if(k=="workflow")w.workflow=unquote(value); else if(k=="path")w.path=unquote(value); else if(k=="host")w.host=unquote(value); else if(k=="long_polling") {if(!boolean(value,w.longPolling)){r.error="invalid bool: websocket.long_polling";return false;}} else if(k=="metrics"){if(!boolean(value,w.metrics)){r.error="invalid bool: websocket.metrics";return false;}} else if(k=="port"){try{auto n=std::stoul(value);if(n>65535)throw std::out_of_range("port");w.port=static_cast(n);}catch(...){r.error="invalid port";return false;}} else {r.error="unsupported websocket field: "+key;return false;} return true;}
   r.error="unsupported vix.module field: "+(sec.empty()?key:sec+"."+key); return false; };
 while(std::getline(in,line)){auto hash=line.find('#');if(hash!=std::string::npos)line.resize(hash);line=trim(line);if(line.empty())continue; if(!pendingKey.empty()){pendingValue+=" "+line;if(line.find(']')==std::string::npos)continue; if(!assign(section,pendingKey,pendingValue))return r;pendingKey.clear();continue;} if(line.front()=='['){if(line.back()!=']'){r.error="malformed section";return r;}section=lower(trim(line.substr(1,line.size()-2))); git=nullptr; if(section.rfind("dependencies.",0)==0){std::string name=section.substr(13); if(name.size()>6&&name.substr(name.size()-6)==".cmake")name.resize(name.size()-6); if(!valid_name(name)){r.error="invalid dependency name";return r;} if(!seenSections.insert(section).second){r.error="duplicate dependency section: "+section;return r;} for(auto &d:r.manifest.gitDependencies)if(d.name==name){git=&d;break;} if(!git){r.manifest.gitDependencies.push_back({});git=&r.manifest.gitDependencies.back();git->name=name;} continue;} if(section!="routes"&§ion!="deps"&§ion!="tests"&§ion!="websocket"&§ion!="exports"){r.error="unsupported section: "+section;return r;}continue;}auto eq=line.find('=');if(eq==std::string::npos){r.error="malformed field";return r;}auto key=trim(line.substr(0,eq));auto value=trim(line.substr(eq+1));if(value.find('[')!=std::string::npos&&value.find(']')==std::string::npos){pendingKey=key;pendingValue=value;continue;}if(!assign(section,key,value))return r; }
 if(!pendingKey.empty()){r.error="truncated array";return r;} if(!any){r.error="empty vix.module";return r;} if(!r.manifest.name.empty()&&!valid_name(r.manifest.name)){r.error="invalid module name";return r;} for(auto &d:r.manifest.gitDependencies){if(d.git.empty()){r.error="Git dependency '"+d.name+"' is missing field 'git'";return r;} int n=(!d.tag.empty())+(!d.branch.empty())+(!d.rev.empty());if(n>1){r.error="Git dependency '"+d.name+"' must use only one of tag, branch, or rev";return r;} if(!d.target.empty())d.targets.push_back(d.target); std::set opts;for(const auto&o:d.cmakeOptions)if(!opts.insert(o.first).second){r.error="duplicate CMake option: "+o.first;return r;}} return r;
}
}