/********************************************************************
  Author:        Dana Vrajitoru, IUSB, CS
  Class:         B424 B524 Parallel Programming
  File name:     songs.cc
  Last updated:  November 2020
  Description:   A program that generates an ideal playlist. 
                 Functions generating a random song list.
*********************************************************************/

#include <cstring>
#include <cstdlib>
#include <cmath>
#include <iostream>
using namespace std;
#include "songs.h"
//#include <climits>

// Taken from various popular songs. A song title is composed of a random
// prep, followed by a  verb, preposition, and noun.
// Example: "Don't Hold For My Bishop"
const int nr_verbs = 15, nr_nouns = 30, nr_prep = 5, nr_starter = 5, 
word_max_length = 15;

char starter[nr_prep][word_max_length] = 
{"Don't", "I", "You", "You Should", ""};

char verbs[nr_verbs][word_max_length] = 
{"Stay", "Hold", "Menace", "Trick", "Water", "Scare", "Slide", "Bet", 
 "Catch", "Bleed", "Smoke", "Enjoy", "Think", "Feel", "Wait"};

char prep[nr_prep][word_max_length] = 
{"The", "That", "Around The", "For That", "For My"};

char nouns[nr_nouns][word_max_length] = 
{"Frosty", "Midnight", "Tea", "Mistakes", "Heaven", "Gate", "Countdown", 
"Champion", "Sunshine", "Riptide", "Menace", "Bishop"," Knife", "Trick", 
"Order", "Water", "Buffaloes", "Clubs", "Heart", "Town", "Bet", "Ship", 
 "Gold Standard", "Coffee", "Dollar", "Nose", "West Coast", "Smoker", 
"Trouble", "Visitor"};


// Creates a random song with title and attributes
void random_song(Song &theSong)
{
    theSong.title1 = rand() % nr_starter;
    theSong.title2 = rand() % nr_verbs;
    theSong.title3 = rand() % nr_prep;
    theSong.title4 = rand() % nr_nouns;
    theSong.att1 = random_attribute();
    theSong.att2 = random_attribute();
}

// Returns a real number between 0 and 1
float random_attribute() 
{
    return float(rand()) / RAND_MAX;
}

// Generates n songs titles and their attributes.
void generate_songs(Song *songs, int n)
{
    for (int i = 0; i < n; i++) 
        random_song(songs[i]);
}

// Computes the distance between the songs at the two indexes based on
// the arrays of attributes.
float distance_song(Song &song1, Song &song2)
{
    return sqrt((song1.att1 - song2.att1)*(song1.att1 - song2.att1) +
                (song1.att2 - song2.att2)*(song1.att2 - song2.att2));
}

// writes out the title of the song on a line
void output_song(Song &theSong)
{
    cout << starter[theSong.title1] << ' ' << verbs[theSong.title2] << ' '
         << prep[theSong.title3] << ' ' << nouns[theSong.title4] 
         << " (" << theSong.att1 << ", " << theSong.att2 << ")" << endl;
}