#ifndef __CGIFormData_h__
# define __CGIFormData_h__

#include "Parser.h"
#include "IMFHeader.h"
#include "IMFBoundary.h"
#include <map>

namespace coreutils {

   ///
   /// CGIFormData parses a CGI request body (application/x-www-form-urlencoded
   /// or multipart/form-data) from the shared StreamReader and exposes the
   /// resulting name/value pairs via operator[] - the object a caller (e.g.
   /// JetCore's Tag::getVariable, for its $[:name] CGI variable syntax) holds
   /// onto and indexes by variable name once doParse() reports COMPLETE.
   ///
   /// Resumable like every other Parser here: for multipart/form-data, each
   /// part's boundary line and header block are parsed via IMFBoundary/
   /// IMFHeader (chained through checkParse(), sharing this same
   /// StreamReader), so a part - or even its boundary marker - can straddle
   /// any number of feed() calls without losing state. File-upload parts
   /// (Content-Disposition with a filename= parameter) are recognized and
   /// skipped - matching this codebase's existing convention that uploads
   /// get a separate mechanism, not buffered through here.
   ///

   class CGIFormData : public Parser {

    public:

      CGIFormData(StreamReader &reader, ZString contentType, int contentLength, ZString boundary);
      virtual ~CGIFormData();

      MString operator[](ZString name);

    protected:

      Status parse() override;

    private:

      enum Mode { URLENCODED, MULTIPART, UNKNOWN } mode;
      enum State { INIT, OPENING_TAIL, PART_HEADERS, PART_BODY, PART_BOUNDARY, URLENCODED_BODY, DONE } state = INIT;

      ZString contentType;
      int contentLength;
      ZString boundary;
      std::map<MString, MString> data;

      IMFHeader *headerParser = NULL;
      IMFBoundary *boundaryParser = NULL;
      MString currentName;
      bool currentSkip = false;
      std::map<MString, int> nameCounts;

      void extractPartName(IMFHeader &header);

      ///
      /// Stores value under "name:N", where N is how many values have
      /// already been stored under this same base name (0 for the first,
      /// 1 for the second, etc.) - matches the indexed key format
      /// JetCore's Tag::getVariable's $[:name] syntax looks up by
      /// (defaulting to :0 when the caller doesn't specify an index),
      /// supporting repeated field names (checkboxes, multi-select) the
      /// same way.
      ///

      void storeValue(MString name, MString value);

   };

}

#endif