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package rinde.sim.pdptw.generator;

import java.io.File;
import java.io.IOException;
import java.util.List;

import rinde.sim.core.graph.Point;

import com.google.common.base.Charsets;
import com.google.common.base.Joiner;
import com.google.common.io.Files;

public class Analysis {

  private Analysis() {}

  /**
   * Writes the specified list of {@link Point}s to the specified file. Each
   * point is printed on a separate line using the following format:
   * 
   *    * {@code x y }
   * 
   * 
   * i.e. the coordinates are space-separated.
   * @param locations The locations to write to file.
   * @param f The file to write to, non-existing parent directories will be
   *          created.
   */
  public static void writeLocationList(List locations, File f) {
    final StringBuilder sb = new StringBuilder();
    for (final Point p : locations) {
      sb.append(p.x).append(" ").append(p.y).append("\n");
    }
    try {
      Files.createParentDirs(f);
      Files.write(sb.toString(), f, Charsets.UTF_8);
    } catch (final IOException e) {
      throw new RuntimeException(e);
    }
  }

  public static void writeLoads(List loads, File f) {
    final StringBuilder sb = new StringBuilder();
    int i = 0;
    for (; i < loads.size(); i++) {
      sb.append(i).append(" ").append(loads.get(i)).append("\n");
    }
    sb.append(i).append(" ").append(0).append("\n");
    try {
      Files.createParentDirs(f);
      Files.write(sb.toString(), f, Charsets.UTF_8);
    } catch (final IOException e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * Writes the provided list of times to a file. The output format is as
   * follows:
   * 
   *    * {@code length}
   * {@code time 1}
   * {@code time 2}
   * ..
   * {@code time n}
   * 
   * @param length The length of the scenario: [0,length)
   * @param times The arrival times of events, for each time it holds that 0
   *          ≤ time < length.
   * @param f The file to write to.
   */
  public static void writeTimes(double length, List times,
      File f) {
    try {
      Files.createParentDirs(f);
      Files.write(
          new StringBuilder().append(length).append("\n")
              .append(Joiner.on("\n").join(times)).append("\n"), f,
          Charsets.UTF_8);
    } catch (final IOException e) {
      throw new IllegalArgumentException(e);
    }
  }
}