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/*
 * Copyright 2015 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.flat;

import javax.lang.model.element.Modifier;

import com.squareup.javapoet.CodeBlock;
import com.squareup.javapoet.MethodSpec;
import com.squareup.javapoet.ParameterSpec;
import com.squareup.javapoet.TypeSpec;

/**
 * @author [email protected] (Marcio Endo)
 */
class RecordParserParse extends AbstractHasRecord {

  public RecordParserParse(RecordInfo record) {
    super(record);
  }

  public MethodSpec get() {
    return MethodSpec.methodBuilder("parse")
        .addAnnotation(Override.class)
        .addModifiers(Modifier.PUBLIC)
        .addParameter(ParameterSpec.builder(FlatFileReader.class, "file").build())
        .returns(superClassTypeName())
        .addException(RecordParseException.class)
        .addCode(body())
        .build();
  }

  public void addTo(TypeSpec.Builder type) {
    type.addMethod(get());
  }

  private CodeBlock body() {
    CodeBlock.Builder body = CodeBlock.builder();
    bodyTop(body);
    body.add("\n");
    bodyIf(body);
    body.add("\n");
    bodyBottom(body);
    return body.build();
  }

  private void bodyBottom(CodeBlock.Builder body) {
    body.add("return new $T()\n", classNameBuilderPojo());

    fieldMethodList().stream()
        .forEach(f -> f.recordBuilderCode(body));

    body.addStatement("    .build()");
  }

  private void bodyIf(CodeBlock.Builder body) {
    body.beginControlFlow("if (!record.valid())")
        .addStatement("throw record.parseException()")
        .endControlFlow();
  }

  private void bodyTop(CodeBlock.Builder body) {
    body.add("$T record = file.recordReader()\n", br.com.objectos.flat.Record.class);

    fieldMethodList().stream()
        .forEach(f -> f.recordReaderCode(body));

    body.addStatement("    .read()");
  }

}