package me.hammerle.code;

import java.io.File;
import java.io.IOException;
import java.nio.charset.MalformedInputException;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.Collection;
import java.util.Random;
import java.util.stream.Collectors;
import me.hammerle.exceptions.PreScriptException;

public class ScriptUtils
{
    private static final Random RANDOM = new Random();
    
    public static int randomInt(int min, int max)
    {
        return RANDOM.nextInt((max - min) + 1) + min;
    }
    
    // -----------------------------------------------------------------------------------
    // number getter
    // -----------------------------------------------------------------------------------
    
    public static int getInt(Object o)
    {
        return ((Number) o).intValue();
    }
    
    public static byte getByte(Object o)
    {
        return ((Number) o).byteValue();
    }
    
    public static double getDouble(Object o)
    {
        return ((Number) o).doubleValue();
    }
    
    public static float getFloat(Object o)
    {
        return ((Number) o).floatValue();
    }
    
    // -----------------------------------------------------------------------------------
    // connectors
    // -----------------------------------------------------------------------------------
    
    public static String connect(Object[] o, int skip)
    {
        return Arrays.stream(o, skip, o.length).map(ob -> String.valueOf(ob))
                .collect(Collectors.joining());
    }
    
    public static String connect(Collection<Object> c, int skip)
    {
        return c.stream().skip(skip).map(o -> o.toString()).collect(Collectors.joining());
    }
    
    public static String connect(Object[] c, String s, int skip)
    {
        return Arrays.stream(c, skip, c.length).map(o -> o.toString()).collect(Collectors.joining(s));
    }
    
    public static String connect(Collection<Object> c, String s, int skip)
    {
        return c.stream().skip(skip).map(o -> String.valueOf(o)).collect(Collectors.joining(s));
    }
    
    // -----------------------------------------------------------------------------------
    // file stuff
    // -----------------------------------------------------------------------------------
    
    public static String readCode(String filename, String ending)
    {
        File script = new File("./" + filename + ending);  
        if(script.exists())
        {
            try
            {
                return String.join("\n", Files.readAllLines(script.toPath()));
            } 
            catch (MalformedInputException ex) 
            {
                throw new PreScriptException(filename, "", "file contains an illegal character, change file encoding");
            }
            catch (IOException ex) 
            {
                throw new PreScriptException(filename, "", "file '" + filename + "' cannot be read");
            }
        }
        throw new PreScriptException(filename, "", "file '" + filename + "' does not exist");
    }
    
    public static String readCode(String filename)
    {
        return readCode(filename, ".snuvi");
    }
}