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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.AttributeValidator;
import guru.nidi.graphviz.attribute.validate.ValidatorMessage;
import guru.nidi.graphviz.model.MutableGraph;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

public final class Parser {
    private static final Logger LOG = LoggerFactory.getLogger(Parser.class);
    @Nullable
    private final String engine;
    @Nullable
    private final String format;
    private final Consumer messageConsumer;

    public Parser() {
        this(null, null, msg -> LOG.info(String.format("%-7s %-15.15s at %3d:%-3d %s",
                msg.severity, msg.attribute, msg.line, msg.column, msg.message)));
    }

    private Parser(@Nullable String engine, @Nullable String format, Consumer messageConsumer) {
        this.engine = engine;
        this.format = format;
        this.messageConsumer = messageConsumer;
    }

    public Parser forEngine(@Nullable String engine) {
        return new Parser(engine, format, messageConsumer);
    }

    public Parser forFormat(@Nullable String 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 {
        return new ParserImpl(new Lexer(dot, name), new AttributeValidator(engine, format), messageConsumer).parse();
    }
}