package atmsdriver.model;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;

/**
 * PostmileCoords is a collection of Postmiles (id and LatLong Coordinates).
 * @author jdalbey
 */
public class PostmileCoords implements Iterable
{
    private List<Postmile> postmileList;
    public PostmileCoords()
    {
        postmileList = new ArrayList<Postmile>();
    }
    /** Accessor to value at given index */
    public Postmile get(int idx)
    {
        return postmileList.get(idx);
    }
    /** Return the size */
    public int size()
    {
        return postmileList.size();
    }
    /** Find the postmile with the given name */
    public Postmile find(String target)
    {
        int idx = 0;
        while (idx < postmileList.size() && !postmileList.get(idx).nameEquals(target))
        {
            idx++;
        }
        if (idx < postmileList.size())
        {
            return postmileList.get(idx);
        }
        else
        {
            return null;
        }
    }
    /** Load the postmile list from external file */
    public void load(Scanner scan)
    {
        String out = scan.next();
        //  split into an array 
        String[] results = out.split("\\n");
        for (String item : results)
        {
            String[] fields = item.split(",");
            String[] nameparts = fields[0].split(" ");
            String statepm = nameparts[2];
            // some postmiles come with a prefix, which we ignore
            if (Character.isLetter(statepm.charAt(0)))
            {
                statepm = statepm.substring(1);
            }  
            String revisedpm = nameparts[0] + " " + nameparts[1] + " " + statepm;
            Postmile pm = new Postmile(revisedpm,fields[1],fields[2]);
            postmileList.add(pm);
        }
    }

    @Override
    public Iterator iterator()
    {
        return postmileList.iterator();
    }
    /**
     *  Postmile is a postmile id and its LatLong Coordinates.
     */
    final static class Postmile  
    {
        String name;  // the postmile name (Route,Direction,State postmile)
        String latitude; // the latitude coordinate for this postmile
        String longitude; // the longitude coordinate for this postmile
        public Postmile(String name, String lat, String longitude)
        {
            this.name = name.trim();
            this.latitude = lat.trim();
            this.longitude = longitude.trim();
        }
        public boolean nameEquals(String target)
        {
            return this.name.equals(target);
        }
        @Override public boolean equals(Object aThat) 
        {
            if (this == aThat) return true;
            if (!(aThat instanceof Postmile)) return false;
            Postmile that = (Postmile) aThat;
            boolean r1 = this.name.equals(that.name);
            boolean r2 = this.latitude.equals(that.latitude);
            boolean r3 = this.longitude.equals(that.longitude);
            return r1 && r2 && r3;
        }
        @Override public String toString()
        {
            return name + ": " + latitude +","+ longitude;
        }
        public String toJson()
        {
            String kFeature = "\n{\n   \"type\": \"Feature\",\n   \"id\": \"";
            String kPoint = "\", \n     \"geometry\":\n       {\n        \"type\": \"Point\",\n        \"coordinates\": [";
            String kProp = "]\n" +
"      },\n" +
"      \"properties\": \n" +
"        {\"color\": \"green\"";
            String kTail = "}\n" +
"    },";
            return kFeature + name + kPoint + longitude + "," + latitude + kProp + kTail;
        }
    }
}