// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:analyzer/analyzer.dart';
import 'package:analyzer/dart/ast/token.dart' show Token;
import 'package:analyzer/src/dart/error/syntactic_errors.dart';
import 'package:front_end/src/fasta/messages.dart' show Code, Message;

/// An error reporter that knows how to convert a Fasta error into an analyzer
/// error.
class FastaErrorReporter {
  /// The underlying error reporter to which errors are reported.
  final ErrorReporter errorReporter;

  /// Initialize a newly created error reporter to report errors to the given
  /// [errorReporter].
  FastaErrorReporter(this.errorReporter);

  void reportByCode(
      String analyzerCode, int offset, int length, Message message) {
    Map<String, dynamic> arguments = message.arguments;

    String lexeme() => (arguments['token'] as Token).lexeme;

    switch (analyzerCode) {
      case "ANNOTATION_WITH_TYPE_ARGUMENTS":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.ANNOTATION_WITH_TYPE_ARGUMENTS,
            offset,
            length);
        return;
      case "ASYNC_FOR_IN_WRONG_CONTEXT":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.ASYNC_FOR_IN_WRONG_CONTEXT, offset, length);
        return;
      case "ASYNC_KEYWORD_USED_AS_IDENTIFIER":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.ASYNC_KEYWORD_USED_AS_IDENTIFIER, offset, length);
        return;
      case "BUILT_IN_IDENTIFIER_AS_TYPE":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE,
            offset,
            length,
            [lexeme()]);
        return;
      case "CATCH_SYNTAX":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.CATCH_SYNTAX, offset, length);
        return;
      case "CONCRETE_CLASS_WITH_ABSTRACT_MEMBER":
        errorReporter?.reportErrorForOffset(
            StaticWarningCode.CONCRETE_CLASS_WITH_ABSTRACT_MEMBER,
            offset,
            length);
        return;
      case "CONST_CONSTRUCTOR_WITH_BODY":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.CONST_CONSTRUCTOR_WITH_BODY, offset, length);
        return;
      case "CONST_NOT_INITIALIZED":
        String name = arguments['name'];
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.CONST_NOT_INITIALIZED, offset, length, [name]);
        return;
      case "DEFAULT_VALUE_IN_FUNCTION_TYPE":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, offset, length);
        return;
      case "LABEL_UNDEFINED":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.LABEL_UNDEFINED,
            offset,
            length,
            [arguments['name']]);
        return;
      case "EMPTY_ENUM_BODY":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.EMPTY_ENUM_BODY, offset, length);
        return;
      case "EXPECTED_CLASS_MEMBER":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.EXPECTED_CLASS_MEMBER, offset, length);
        return;
      case "EXPECTED_EXECUTABLE":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.EXPECTED_EXECUTABLE, offset, length);
        return;
      case "EXPECTED_STRING_LITERAL":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.EXPECTED_STRING_LITERAL, offset, length);
        return;
      case "EXPECTED_TOKEN":
        errorReporter?.reportErrorForOffset(ParserErrorCode.EXPECTED_TOKEN,
            offset, length, [arguments['string']]);
        return;
      case "EXPECTED_TYPE_NAME":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.EXPECTED_TYPE_NAME, offset, length);
        return;
      case "EXTERNAL_CONSTRUCTOR_WITH_BODY":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.EXTERNAL_CONSTRUCTOR_WITH_BODY, offset, length);
        return;
      case "FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR,
            offset,
            length);
        return;
      case "FINAL_AND_VAR":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.FINAL_AND_VAR, offset, length);
        return;
      case "FINAL_NOT_INITIALIZED":
        String name = arguments['name'];
        errorReporter?.reportErrorForOffset(
            StaticWarningCode.FINAL_NOT_INITIALIZED, offset, length, [name]);
        return;
      case "FINAL_NOT_INITIALIZED_CONSTRUCTOR_1":
        String name = arguments['name'];
        errorReporter?.reportErrorForOffset(
            StaticWarningCode.FINAL_NOT_INITIALIZED_CONSTRUCTOR_1,
            offset,
            length,
            [name]);
        return;
      case "FUNCTION_TYPED_PARAMETER_VAR":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.FUNCTION_TYPED_PARAMETER_VAR, offset, length);
        return;
      case "GETTER_WITH_PARAMETERS":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.GETTER_WITH_PARAMETERS, offset, length);
        return;
      case "ILLEGAL_CHARACTER":
        errorReporter?.reportErrorForOffset(
            ScannerErrorCode.ILLEGAL_CHARACTER, offset, length);
        return;
      case "INITIALIZED_VARIABLE_IN_FOR_EACH":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.INITIALIZED_VARIABLE_IN_FOR_EACH, offset, length);
        return;
      case "INVALID_ASSIGNMENT":
        var type1 = arguments['type'];
        var type2 = arguments['type2'];
        errorReporter?.reportErrorForOffset(
            StaticTypeWarningCode.INVALID_ASSIGNMENT,
            offset,
            length,
            [type1, type2]);
        return;
      case "INVALID_INLINE_FUNCTION_TYPE":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.INVALID_INLINE_FUNCTION_TYPE, offset, length);
        return;
      case "INVALID_LITERAL_IN_CONFIGURATION":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.INVALID_LITERAL_IN_CONFIGURATION, offset, length);
        return;
      case "IMPORT_OF_NON_LIBRARY":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.IMPORT_OF_NON_LIBRARY, offset, length);
        return;
      case "INVALID_CAST_FUNCTION":
        errorReporter?.reportErrorForOffset(
            StrongModeCode.INVALID_CAST_FUNCTION, offset, length);
        return;
      case "INVALID_CAST_FUNCTION_EXPR":
        errorReporter?.reportErrorForOffset(
            StrongModeCode.INVALID_CAST_FUNCTION_EXPR, offset, length);
        return;
      case "INVALID_CAST_LITERAL_LIST":
        errorReporter?.reportErrorForOffset(
            StrongModeCode.INVALID_CAST_LITERAL_LIST, offset, length);
        return;
      case "INVALID_CAST_LITERAL_MAP":
        errorReporter?.reportErrorForOffset(
            StrongModeCode.INVALID_CAST_LITERAL_MAP, offset, length);
        return;
      case "INVALID_CAST_METHOD":
        errorReporter?.reportErrorForOffset(
            StrongModeCode.INVALID_CAST_METHOD, offset, length);
        return;
      case "INVALID_CAST_NEW_EXPR":
        errorReporter?.reportErrorForOffset(
            StrongModeCode.INVALID_CAST_NEW_EXPR, offset, length);
        return;
      case "INVALID_CODE_POINT":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.INVALID_CODE_POINT, offset, length, ['\\u{...}']);
        return;
      case "INVALID_CONSTRUCTOR_NAME":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.INVALID_CONSTRUCTOR_NAME, offset, length);
        return;
      case "INVALID_GENERIC_FUNCTION_TYPE":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.INVALID_GENERIC_FUNCTION_TYPE, offset, length);
        return;
      case "INVALID_METHOD_OVERRIDE":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.INVALID_OVERRIDE, offset, length);
        return;
      case "INVALID_MODIFIER_ON_SETTER":
        _reportByCode(CompileTimeErrorCode.INVALID_MODIFIER_ON_SETTER, message,
            offset, length);
        return;
      case "INVALID_OPERATOR_FOR_SUPER":
        _reportByCode(ParserErrorCode.INVALID_OPERATOR_FOR_SUPER, message,
            offset, length);
        return;
      case "INVALID_SUPER_INVOCATION":
        errorReporter?.reportErrorForOffset(
            StrongModeCode.INVALID_SUPER_INVOCATION, offset, length);
        return;
      case "MISSING_CATCH_OR_FINALLY":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_CATCH_OR_FINALLY, offset, length);
        return;
      case "MISSING_CLASS_BODY":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_CLASS_BODY, offset, length);
        return;
      case "MISSING_DIGIT":
        errorReporter?.reportErrorForOffset(
            ScannerErrorCode.MISSING_DIGIT, offset, length);
        return;
      case "MISSING_ENUM_BODY":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_ENUM_BODY, offset, length);
        return;
      case "MISSING_FUNCTION_BODY":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_FUNCTION_BODY, offset, length);
        return;
      case "MISSING_FUNCTION_PARAMETERS":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_FUNCTION_PARAMETERS, offset, length);
        return;
      case "MISSING_HEX_DIGIT":
        errorReporter?.reportErrorForOffset(
            ScannerErrorCode.MISSING_HEX_DIGIT, offset, length);
        return;
      case "MISSING_IDENTIFIER":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_IDENTIFIER, offset, length);
        return;
      case "MISSING_METHOD_PARAMETERS":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_METHOD_PARAMETERS, offset, length);
        return;
      case "MISSING_STAR_AFTER_SYNC":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_STAR_AFTER_SYNC, offset, length);
        return;
      case "MISSING_TYPEDEF_PARAMETERS":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MISSING_TYPEDEF_PARAMETERS, offset, length);
        return;
      case "MULTIPLE_IMPLEMENTS_CLAUSES":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.MULTIPLE_IMPLEMENTS_CLAUSES, offset, length);
        return;
      case "NAMED_FUNCTION_EXPRESSION":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.NAMED_FUNCTION_EXPRESSION, offset, length);
        return;
      case "NAMED_PARAMETER_OUTSIDE_GROUP":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.NAMED_PARAMETER_OUTSIDE_GROUP, offset, length);
        return;
      case "NON_PART_OF_DIRECTIVE_IN_PART":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.NON_PART_OF_DIRECTIVE_IN_PART, offset, length);
        return;
      case "NON_SYNC_FACTORY":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.NON_SYNC_FACTORY, offset, length);
        return;
      case "POSITIONAL_AFTER_NAMED_ARGUMENT":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.POSITIONAL_AFTER_NAMED_ARGUMENT, offset, length);
        return;
      case "RECURSIVE_CONSTRUCTOR_REDIRECT":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.RECURSIVE_CONSTRUCTOR_REDIRECT,
            offset,
            length);
        return;
      case "RETURN_IN_GENERATOR":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.RETURN_IN_GENERATOR, offset, length,
            // TODO(danrubel): Update the parser to report the modifier
            // involved in this error... either async* or sync*
            ['async*']);
        return;
      case "STACK_OVERFLOW":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.STACK_OVERFLOW, offset, length);
        return;
      case "SUPER_IN_REDIRECTING_CONSTRUCTOR":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.SUPER_IN_REDIRECTING_CONSTRUCTOR,
            offset,
            length);
        return;
      case "TYPE_PARAMETER_ON_CONSTRUCTOR":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.TYPE_PARAMETER_ON_CONSTRUCTOR, offset, length);
        return;
      case "UNDEFINED_CLASS":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.UNDEFINED_CLASS, offset, length);
        return;
      case "UNDEFINED_GETTER":
        errorReporter?.reportErrorForOffset(
            StaticTypeWarningCode.UNDEFINED_GETTER, offset, length);
        return;
      case "UNDEFINED_METHOD":
        errorReporter?.reportErrorForOffset(
            StaticTypeWarningCode.UNDEFINED_METHOD, offset, length);
        return;
      case "UNDEFINED_SETTER":
        errorReporter?.reportErrorForOffset(
            StaticTypeWarningCode.UNDEFINED_SETTER, offset, length);
        return;
      case "UNEXPECTED_DOLLAR_IN_STRING":
        errorReporter?.reportErrorForOffset(
            ScannerErrorCode.UNEXPECTED_DOLLAR_IN_STRING, offset, length);
        return;
      case "UNEXPECTED_TOKEN":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.UNEXPECTED_TOKEN, offset, length, [lexeme()]);
        return;
      case "UNTERMINATED_MULTI_LINE_COMMENT":
        errorReporter?.reportErrorForOffset(
            ScannerErrorCode.UNTERMINATED_MULTI_LINE_COMMENT, offset, length);
        return;
      case "UNTERMINATED_STRING_LITERAL":
        errorReporter?.reportErrorForOffset(
            ScannerErrorCode.UNTERMINATED_STRING_LITERAL, offset, length);
        return;
      case "VAR_AND_TYPE":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.VAR_AND_TYPE, offset, length);
        return;
      case "WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER,
            offset,
            length);
        return;
      case "WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR":
        errorReporter?.reportErrorMessage(
            StaticTypeWarningCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR,
            offset,
            length,
            message);
        return;
      case "WRONG_SEPARATOR_FOR_POSITIONAL_PARAMETER":
        errorReporter?.reportErrorForOffset(
            ParserErrorCode.WRONG_SEPARATOR_FOR_POSITIONAL_PARAMETER,
            offset,
            length);
        return;
      case "YIELD_IN_NON_GENERATOR":
        errorReporter?.reportErrorForOffset(
            CompileTimeErrorCode.YIELD_IN_NON_GENERATOR, offset, length);
        return;
      default:
      // fall through
    }
  }

  /// Report an error based on the given [message] whose range is described by
  /// the given [offset] and [length].
  void reportMessage(Message message, int offset, int length) {
    Code code = message.code;
    int index = code.index;
    if (index != null && index > 0 && index < fastaAnalyzerErrorCodes.length) {
      ErrorCode errorCode = fastaAnalyzerErrorCodes[index];
      if (errorCode != null) {
        errorReporter.reportError(new AnalysisError.forValues(
            errorReporter.source,
            offset,
            length,
            errorCode,
            message.message,
            message.tip));
        return;
      }
    }
    reportByCode(code.analyzerCodes?.first, offset, length, message);
  }

  void reportScannerError(
      ScannerErrorCode errorCode, int offset, List<Object> arguments) {
    // TODO(danrubel): update client to pass length in addition to offset.
    int length = 1;
    errorReporter?.reportErrorForOffset(errorCode, offset, length, arguments);
  }

  void _reportByCode(
      ErrorCode errorCode, Message message, int offset, int length) {
    if (errorReporter != null) {
      errorReporter.reportError(new AnalysisError.forValues(
          errorReporter.source,
          offset,
          length,
          errorCode,
          message.message,
          null));
    }
  }
}
