import com.sun.xml.internal.ws.api.ha.StickyFeature;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.Socket;
import java.util.ArrayList;
import java.util.stream.Collectors;

public class httpRead {


    private String command;
    private int code=200;
    private String phrase="OK";
    private String returnBody="";
    private String returnMSG="";
    private String method="";
    private String version="";
    private String uri="";
    private boolean filePermission=true;
    private ArrayList<String> URLlist = new ArrayList<String>();


    public httpRead(String command)
    {
        this.command=command;
    }
    public String returnHeader="";
    public boolean istxt=true;


    public void main(Socket socket) throws IOException {
        String html = "html";
        String png = "png";
        URLlist.add(command);
        parseURL(command);
        String name=uri;


        if (isValid())
        {

            File file = new File("."+name);
            if (file.isDirectory())
            {
                URLlist.add()

            }


            if(file.exists() && name.contains(html))
            {
                //CHECKS PERMISSION AND PROCESSES ERROR 403

                if(!checkPermission(file))
                {
                    file= new File("."+"/error403.html");
                }
                FileReader FR = new FileReader(file);
                BufferedReader reader = new BufferedReader(FR);
                String fileContent = reader.lines().collect(Collectors.joining());
                returnBody = fileContent;
                System.out.println("should print file content" + fileContent);

            }


            else if(file.exists() && name.contains(png)) {
                istxt = false;
                FileInputStream FIS = new FileInputStream(command);
                BufferedInputStream BIS = new BufferedInputStream(FIS);
                InputStream IS = BIS;
                Image image = ImageIO.read(IS);
                // System.out.print(image);
                //BufferedImage bi = ImageIO.read(IS);
                ObjectOutputStream toBrowser = new ObjectOutputStream(socket.getOutputStream());
                toBrowser.writeBytes(response() + image);
                toBrowser.flush();
            }

            else if (!file.exists())
            {
                File error = new File("."+"/error404.html");
                FileReader FR = new FileReader(error);
                BufferedReader er = new BufferedReader(FR);
                String errorContent = er.lines().collect(Collectors.joining());
                returnBody = errorContent;
                System.out.println("should print file content"+ errorContent);
                code=404;
                phrase="NO";
            }
        }
        else
        {
            //ERROR 500?
        }
    }

    public boolean checkPermission(File file) {
        String restricted = ""; // Manually code how the file should be

        try {
            if (!filePermission)
            {

            }
            else if (file.equals(restricted)) {
                System.out.println("No permission: " + file);
                filePermission = false;
            }

        } catch (Exception e) {
            e.getMessage();

        }
        return filePermission;

    }

    public void parseURL(String command)
    {


        String[] parts=command.split("\\s+");

        method=(parts[0]);
        version=(parts[2]);
        uri=(parts[1]);
    }


    public String response()
    {
        String head=makeHead();
        returnMSG+=head+returnBody;
        System.out.println(returnMSG+"\r\n");
        return returnMSG;

    }

    public boolean isValid()
    {
        boolean num=true;


        return num;
        //DETERMINE IF COMMAND IS VALID HTTP
        //DETERMINE IF CLIENT HAS AUTHORIZATION
        //CHANGE CODE ACCORDINGLY(200,403,404 etc)


    }

private String makeHead()
{
    returnHeader+=version+" "+ code + " " + phrase;
    String server="Server: My Computer";
    String date="Date: Today";
    String length="Content Length: ";
    int ln=returnBody.length();
    String len=Integer.toString(ln);
    length+=len;
    String type="Content Type: ";
    if (!istxt)
    {type+= ".png/html";}
    else{type+=".txt/html";}
    String s="\r\n";
    returnHeader+= s + date+ s + server+ s + length + s + type +s+s;
  return returnHeader;

}



}