/*
 * Copyright 2015 Dropbox, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dropbox.djinni.ideaplugin;

import com.dropbox.djinni.ideaplugin.parser.YamlParser;
import com.dropbox.djinni.ideaplugin.psi.YamlFile;
import com.dropbox.djinni.ideaplugin.psi.YamlTypes;
import com.intellij.lang.ASTNode;
import com.intellij.lang.Language;
import com.intellij.lang.ParserDefinition;
import com.intellij.lang.PsiParser;
import com.intellij.lexer.FlexAdapter;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.project.Project;
import com.intellij.psi.FileViewProvider;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.TokenType;
import com.intellij.psi.tree.IFileElementType;
import com.intellij.psi.tree.TokenSet;
import org.jetbrains.annotations.NotNull;

import java.io.Reader;
/**
 * Created by jaetzold on 8/11/15.
 */
public class YamlParserDefinition implements ParserDefinition{
    public static final TokenSet WHITE_SPACES = TokenSet.create(TokenType.WHITE_SPACE);
    public static final TokenSet COMMENTS = TokenSet.create(YamlTypes.COMMENT);

    public static final IFileElementType FILE = new IFileElementType(Language.<YamlLanguage>findInstance(YamlLanguage.class));

    @NotNull
    @Override
    public Lexer createLexer(Project project) {
      return new YamlLexerAdapter();
    }

    @NotNull
    public TokenSet getWhitespaceTokens() {
      return WHITE_SPACES;
    }

    @NotNull
    public TokenSet getCommentTokens() {
      return COMMENTS;
    }

    @NotNull
    public TokenSet getStringLiteralElements() {
      return TokenSet.EMPTY;
    }

    @NotNull
    public PsiParser createParser(final Project project) {
      return new YamlParser();
    }

    @Override
    public IFileElementType getFileNodeType() {
      return FILE;
    }

    public PsiFile createFile(FileViewProvider viewProvider) {
      return new YamlFile(viewProvider);
    }

    public SpaceRequirements spaceExistanceTypeBetweenTokens(ASTNode left, ASTNode right) {
      return SpaceRequirements.MAY;
    }

    @NotNull
    public PsiElement createElement(ASTNode node) {
      return YamlTypes.Factory.createElement(node);
    }
  }