#include "tree_sitter/parser.h"

enum TokenType {
  QUOTED_CONTENT,
  DOC_COMMENT_CONTENT,
};

void * tree_sitter_gleam_external_scanner_create() {return NULL;}
void tree_sitter_gleam_external_scanner_destroy(void * payload) {}
unsigned tree_sitter_gleam_external_scanner_serialize(void * payload, char * buffer) {return 0;}
void tree_sitter_gleam_external_scanner_deserialize(void * payload, const char * buffer, unsigned length) {}

bool tree_sitter_gleam_external_scanner_scan(void * payload, TSLexer *lexer, const bool * valid_symbols) {
  if (valid_symbols[QUOTED_CONTENT]) {
    bool has_content = false;

    while (true) {
      if (lexer->lookahead == '\"' || lexer->lookahead == '\\') {
        break;
      } else if (lexer->lookahead == 0) {
        return false;
      }
      has_content = true;
      lexer->advance(lexer, false);
    }
    lexer->result_symbol = QUOTED_CONTENT;
    return has_content;
  }

  if (valid_symbols[DOC_COMMENT_CONTENT]) {
    lexer->result_symbol = DOC_COMMENT_CONTENT;
    while (true) {
        if (lexer->eof(lexer)) {
            return true;
        }
        if (lexer->lookahead == '\n') {
            // including the line ending in doc
            // comments is necessary for markdown injections
            lexer->advance(lexer, false);
            return true;
        }
        lexer->advance(lexer, false);
    }
  }
  
  return false;
}