package com.gordonlu.decimal2fraction;

import android.app.Activity;
import android.content.Context;
import com.google.appinventor.components.annotations.*;
import com.google.appinventor.components.common.ComponentCategory;
import com.google.appinventor.components.runtime.AndroidNonvisibleComponent;
import com.google.appinventor.components.runtime.ComponentContainer;
import com.google.appinventor.components.runtime.EventDispatcher;
import java.util.*;

@DesignerComponent(
        version = 1,
        description = "Converts a decimal into a fraction.",
        category = ComponentCategory.EXTENSION,
        nonVisible = true,
        iconName = "https://docs.google.com/drawings/d/e/2PACX-1vQCI87PHLBF0jb8QWyYmIRQSjjNW3EFXf-qpsWCvBYkUQ9vEgPAB8SpxcMpblxNpbIYrjCjLrRLIU2c/pub?w=16&h=16")

@SimpleObject(external = true)
//Libraries
@UsesLibraries(libraries = "")
//Permissions
@UsesPermissions(permissionNames = "")

public class Decimal2Fraction extends AndroidNonvisibleComponent {

    //Activity and Context
    private Context context;
    private Activity activity;

    public Decimal2Fraction(ComponentContainer container){
        super(container.$form());
        this.activity = container.$context();
        this.context = container.$context();
    }

    @SimpleFunction(description = "Turns a decimal into a fraction.")
    public static String DecimalToFraction(double number, String separator) {
    double intVal = Math.floor(number);
    double fVal = number - intVal;
    final long pVal = 1000000000;
    long gcdVal = gcd(Math.round(fVal * pVal), pVal);

    long num = Math.round(fVal * pVal) / gcdVal;
    long deno = pVal / gcdVal;
    return ((long)(intVal * deno) +
                           num + separator + deno);
    }
    @SimpleFunction(description = "Gets the numerator from the decimal.")
    public static long GetNumerator(double number) {
    double intVal = Math.floor(number);
    double fVal = number - intVal;
    final long pVal = 1000000000;
    long gcdVal = gcd(Math.round(fVal * pVal), pVal);

    long num = Math.round(fVal * pVal) / gcdVal;
    long deno = pVal / gcdVal;
    return ((long)(intVal * deno) +
                           num);
    }
    @SimpleFunction(description = "Gets the denominator from the decimal.")
    public static long GetDenominator(double number) {
    double intVal = Math.floor(number);
    double fVal = number - intVal;
    final long pVal = 1000000000;
    long gcdVal = gcd(Math.round(fVal * pVal), pVal);

    long num = Math.round(fVal * pVal) / gcdVal;
    long deno = pVal / gcdVal;
    return ((long)deno);
    }
    private static long gcd(long a, long b)
{
    if (a == 0)
        return b;
    else if (b == 0)
        return a;
    if (a < b)
        return gcd(a, b % a);
    else
        return gcd(b, a % b);
}
}