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/*
 * Copyright © 2015 Stefan Niederhauser ([email protected])
 *
 * 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 guru.nidi.graphviz.parse;

import guru.nidi.graphviz.attribute.validate.*;
import guru.nidi.graphviz.model.MutableGraph;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.function.Consumer;

import static guru.nidi.graphviz.attribute.validate.ValidatorEngine.UNKNOWN_ENGINE;
import static guru.nidi.graphviz.attribute.validate.ValidatorFormat.UNKNOWN_FORMAT;
import static guru.nidi.graphviz.attribute.validate.ValidatorMessage.LINE_LOGGING_CONSUMER;

public final class Parser {
    private final ValidatorEngine engine;
    private final ValidatorFormat format;
    private final Consumer messageConsumer;

    public Parser() {
        this(UNKNOWN_ENGINE, UNKNOWN_FORMAT, LINE_LOGGING_CONSUMER);
    }

    private Parser(ValidatorEngine engine, ValidatorFormat format, Consumer messageConsumer) {
        this.engine = engine;
        this.format = format;
        this.messageConsumer = messageConsumer;
    }

    public Parser forEngine(ValidatorEngine engine) {
        return new Parser(engine, format, messageConsumer);
    }

    public Parser forFormat(ValidatorFormat format) {
        return new Parser(engine, format, messageConsumer);
    }

    public Parser messageConsumer(Consumer messageConsumer) {
        return new Parser(engine, format, messageConsumer);
    }

    public MutableGraph read(File file) throws IOException {
        return read(new InputStreamReader(new FileInputStream(file), StandardCharsets.UTF_8), file.getName());
    }

    public MutableGraph read(InputStream is) throws IOException {
        return read(new InputStreamReader(is, StandardCharsets.UTF_8), "");
    }

    public MutableGraph read(String dot) throws IOException {
        return read(new StringReader(dot), "");
    }

    public MutableGraph read(Reader dot, String name) throws IOException {
        final AttributeValidator validator = new AttributeValidator().forEngine(engine).forFormat(format);
        return new ParserImpl(new Lexer(dot, name), validator, messageConsumer).parse();
    }
}