import java.util.Vector;
import java.nio.file.Paths;
import java.util.Scanner;
import java.io.IOException;
import java.util.concurrent.*; 

//a collection of helper functions to act as responses for otherwise
//external calls in this implementation for demo purposes

public class HelperFunctions {
    public double[] geocodingAPI(String inputAddress) { //simulates converting an input address into lat-long coordinates
        double[] coords = new double[2];
        switch (inputAddress) {
            case "250 Community College Pkwy SE, Palm Bay, FL 32909":
                coords[0] = 27.993699393377653;
                coords[1] = -80.63006489971767;
                break;
            case "3865 N Wickham Rd, Melbourne, FL 32935":
                coords[0] = 28.17009584609403;
                coords[1] = -80.67083038806463;
                break;
        }
        double[] returnArray = coords;
        return returnArray;
    }

    public Vector<String[]> routingAPI(double[] startCoords, String destinationAddress, Boolean tollsFlag, Boolean hwyFlag) {
        //method simulates a call to translate two pairs of coords into a driving route
        //for demo purposes returns a pregenerated set of move instructions
        //located in DrivingRoute<X>.txt as semicolon delimited strings for direction, distance, and speedLimit
        Vector<String[]> routeArray = new Vector<String[]>();
        if (tollsFlag && hwyFlag) { //provides a result that both avoid tolls and major highways
        	try (Scanner infile = new Scanner(Paths.get("DrivingRoute2.txt"))) {
                while (infile.hasNext()) {
                    routeArray.addElement(infile.nextLine().split(";"));
                }
            } catch (IOException e) {
                System.err.println("File handling error");
            }
        } else if (tollsFlag && !hwyFlag) { //provides a result that avoids tolls but not major highways
        	try (Scanner infile = new Scanner(Paths.get("DrivingRoute1.txt"))) {
                while (infile.hasNext()) {
                    routeArray.addElement(infile.nextLine().split(";"));
                }
            } catch (IOException e) {
                System.err.println("File handling error");
            }
        } else if (!tollsFlag && hwyFlag) { //provides a result that does not avoid tolls and does avoid major highways
        	try (Scanner infile = new Scanner(Paths.get("DrivingRoute2.txt"))) {
                while (infile.hasNext()) {
                    routeArray.addElement(infile.nextLine().split(";"));
                }
            } catch (IOException e) {
                System.err.println("File handling error");
            }
        } else if (!tollsFlag && !hwyFlag) { //provides a result that does not avoid tolls or major highways
            try (Scanner infile = new Scanner(Paths.get("DrivingRoute1.txt"))) {
                while (infile.hasNext()) {
                    routeArray.addElement(infile.nextLine().split(";"));
                }
            } catch (IOException e) {
                System.err.println("File handling error");
            }

        }
        return routeArray;
    }

    public int[] internalTempSensors() {
        int[] temps = {76, 74};
        return temps;
    }

    public int externalTempSensors() {
        return 88;
    }
    
    public static void sleep(int time) { //helper function to sleep 1 second
    	try {TimeUnit.SECONDS.sleep(time);} //sleep for 1-15 second to simulate traffic light
        catch (InterruptedException e) {System.err.println("Sleep interrupted");}
    }
    
    public static void pressEnterToContinue() { 
    	System.out.println("Press Enter key to continue...");
        try {
        	System.in.read();
        } catch(Exception e) {}  
    }
}