package com.hit.basmath.interview.top_interview_questions.easy_collection.math;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

/**
 * 412. Fizz Buzz
 * <p>
 * 写一个程序，输出从 1 到 n 数字的字符串表示。
 * <p>
 * 1. 如果 n 是3的倍数，输出“Fizz”；
 * 2. 如果 n 是5的倍数，输出“Buzz”；
 * 3.如果 n 同时是3和5的倍数，输出 “FizzBuzz”。
 * <p>
 * 示例：
 * <p>
 * n = 15,
 * <p>
 * 返回:
 * [
 * "1",
 * "2",
 * "Fizz",
 * "4",
 * "Buzz",
 * "Fizz",
 * "7",
 * "8",
 * "Fizz",
 * "Buzz",
 * "11",
 * "Fizz",
 * "13",
 * "14",
 * "FizzBuzz"
 * ]
 */
public class _412 {
    public List<String> fizzBuzz(int n) {
        List<String> ans = new ArrayList<String>();
        for (int num = 1; num <= n; num++) {
            boolean divisibleBy3 = (num % 3 == 0);
            boolean divisibleBy5 = (num % 5 == 0);
            if (divisibleBy3 && divisibleBy5) {
                ans.add("FizzBuzz");
            } else if (divisibleBy3) {
                ans.add("Fizz");
            } else if (divisibleBy5) {
                ans.add("Buzz");
            } else {
                ans.add(Integer.toString(num));
            }
        }
        return ans;
    }

    public List<String> fizzBuzz2(int n) {
        List<String> ans = new ArrayList<String>();
        HashMap<Integer, String> fizzBizzDict =
                new HashMap<Integer, String>() {
                    private static final long serialVersionUID = 7966206953841139705L;

                    {
                        put(3, "Fizz");
                        put(5, "Buzz");
                    }
                };
        for (int num = 1; num <= n; num++) {
            StringBuilder numAnsStr = new StringBuilder();
            for (Integer key : fizzBizzDict.keySet()) {
                if (num % key == 0) {
                    numAnsStr.append(fizzBizzDict.get(key));
                }
            }
            if (numAnsStr.toString().equals("")) {
                numAnsStr.append(Integer.toString(num));
            }
            ans.add(numAnsStr.toString());
        }
        return ans;
    }
}