#include <catch2/catch.hpp>
#include "../lib/Parser.hpp"
#include "../lib/Lexer.hpp"

class ParserTest
{
public:
  explicit ParserTest() {}
  virtual ~ParserTest() {}

protected:
};

static void test_parser(std::string const& oracle,
                        std::string const& source)
{
  muz::Lexer lexer;
  lexer.scan(source);

  muz::Parser parser;
  auto node = parser.parse(lexer);
  REQUIRE(oracle == node->string());
}

static void test_parser_err(std::string const& source)
{
  muz::Lexer lexer;
  lexer.scan(source);

  muz::Parser parser;
  REQUIRE_THROWS_AS(parser.parse(lexer), muz::syntax_error);
}

TEST_CASE_METHOD(ParserTest, "Parser_commands")
{
  test_parser_err("[hello");
  test_parser_err("hello]");
  test_parser_err("12");

  test_parser("PROG(CMD(IDENT[hello]),CMD(IDENT[world]))",
              "[hello] [world]");

  test_parser("PROG(CMD(IDENT[hello_world]))",
              "[hello_world]");

  test_parser("PROG(CMD(IDENT[sine],NUM[440]))",
              "[sine 440]");

  test_parser("PROG(CMD(IDENT[sine],NUM[440],NUM[217]))",
              "[sine 440 217]");
}

TEST_CASE_METHOD(ParserTest, "Parser_directives")
{
  test_parser("PROG(DIR(DIR_IDENT[@bim],CMD(IDENT[hello_world])))",
              "@bim [hello_world]");
}