/*
 * SE1021
 * Winter 2016-2017
 * Lab 1
 * Name: Brady Cassada
 * Created: 12/7/2016
 */

import java.util.*;

public class Lab1 {
    public static void main (String [] args) {
        Scanner in = new Scanner(System.in);
        int userChoice;
        final int DEFAULT_FRAMES = 8000;
        final int DEFAULT_SAMPLE_RATE = 8000;
        final int DEFAULT_CHANNELS = 1;
        final int DEFAULT_VALID_BITS = 8;

        do {
            try {
                System.out.println("Please enter the number corresponding with the menu choices " +
                        "below:");
                System.out.println("0 - Exit\n1 - Reverse Play\n2 - Specified Tone");
                userChoice = in.nextInt();
            }
            catch (InputMismatchException e) {
                System.out.println("Invalid Input - Please try again.");
                userChoice = -1;
            }
            switch (userChoice){
                case 1: //reverse play
                    System.out.println("Please enter the file name (excluding the .wav extension)" +
                            ".");
                    String fileInName = in.next();
                    String fileIn = fileInName + ".wav";
                    WavFile wavFileIn = new WavFile(fileIn);
                    reverseWav(wavFileIn, fileInName);
                    wavFileIn.close();
                    break;
                case 2: //specified tone
                    System.out.println("Please enter a file name (excluding the .wav extension).");
                    String toneName = in.next();
                    System.out.println("Please enter the desired frequency of the tone.");
                    int frequency = in.nextInt();
                    WavFile tone = new WavFile(toneName + ".wav", DEFAULT_CHANNELS, DEFAULT_FRAMES,
                            DEFAULT_VALID_BITS, DEFAULT_SAMPLE_RATE);
                    ArrayList<Double> toneSamples = generateSamples(frequency, DEFAULT_SAMPLE_RATE);
                    tone.setSamples(toneSamples);
                    tone.close();
                    break;
                case 3:


                    break;
            }
        } while (userChoice != 0);
        System.out.println("Goodbye");
    }

    private static void reverseWav(WavFile wavFileIn, String fileInName) {
        ArrayList<Double> samples = wavFileIn.getSamples();
        ArrayList<Double> samplesRev = samples;
        Collections.reverse(samplesRev);
        WavFile wavFileOut = new WavFile(fileInName+"Rev.wav",
                wavFileIn.getNumChannels(), wavFileIn.getNumFrames(),
                wavFileIn.getValidBits(), wavFileIn.getSampleRate());
        wavFileOut.setSamples(samplesRev);
        wavFileOut.close();
        wavFileIn.close();

    }
    private static ArrayList generateSamples(int frequency, int sampleRate) {
        ArrayList<Double> samples = new ArrayList<>();
        for (int i = 0; i < sampleRate; i++) {
            samples.add((Math.sin(2 * Math.PI * i *  frequency / sampleRate)));
        }
        return samples;
    }
}