package framework.network;

import android.os.AsyncTask;
import android.util.Log;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

abstract public class HttpAsyncConnection extends AsyncTask<Void, Void, String> {

    private HttpURLConnection conn = null;
    private String baseUrl = null;
    private String queryParams = "";
    private String pathParams = "";
    private String formParams = "";
    private CallBack callBack = null;


    private String method;
    private static String clientSessionID = null;

    public HttpAsyncConnection(String url) {
        baseUrl = url;
    }


    public void doPost() {
        setMethod("POST");
        execute();
    }

    public void doGet() {
        setMethod("GET");
        execute();
    }

    public void doPut() {
        setMethod("PUT");
        execute();
    }

    public void doDelete() {
        setMethod("DELETE");
        execute();
    }

    public void setCallBack(CallBack callBack) {
        this.callBack = callBack;
    }

    private void setMethod(String method) {
        this.method = method;
    }

    @Override
    protected String doInBackground(Void... urls) {
        doAnything();
        return doReceive();
    }

    /* (non-Javadoc)
     * @see android.os.AsyncTask#onPostExecute(java.lang.Object)
     */
    public void onPostExecute(String response) {
        try {
            if (callBack != null) callBack.onResponse(response);
        } catch (Exception e) {
            // TODO: handle exception
            Log.d("error", "エラー！");
        }
    }


    // request
    public void doAnything() {
        try {
            if (conn == null) {
                if (queryParams == null || queryParams.length() == 0) {
                    conn = (HttpURLConnection) new URL(baseUrl + pathParams).openConnection();
                } else {
                    conn = (HttpURLConnection) new URL(baseUrl + pathParams + "?" + queryParams).openConnection();
                }
            }
            conn.setReadTimeout(10000 /* milliseconds */);
            conn.setConnectTimeout(15000 /* milliseconds */);
            // POST or GET or PUT or DELETE
            conn.setRequestMethod(method);

            if (formParams.length() > 0) {
                conn.setDoOutput(true);
                if (clientSessionID != null) {
                    conn.setRequestProperty("Cookie", clientSessionID);
                }
                OutputStream out = conn.getOutputStream();
                out.write(formParams.getBytes("UTF-8"));
                out.flush();
                out.close();
                formParams = "";
            }
            pathParams = "";
            queryParams = "";

            conn.connect();

            if (clientSessionID == null) {
                clientSessionID = conn.getHeaderField("Set-Cookie");

            }
        } catch (IOException e) {
            notConnection();
            e.printStackTrace();
        }
    }

    // response
    public String doReceive() {
        BufferedReader reader;
        try {
            reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            StringBuilder builder = new StringBuilder();
            while ((line = reader.readLine()) != null)
                builder.append(line);
            reader.close();
            if (conn != null) conn.disconnect();
            return builder.toString();
        } catch (IOException e) {
            e.printStackTrace();
            if (conn != null) conn.disconnect();
            return null;
        }

    }

    public void notConnection() {
    }

    ;

    /**
     * param set
     *
     * @param key
     * @param value
     */
    public void addQueryParam(String key, String value) {
        if (queryParams.length() > 0) {
            queryParams += ("&");
        }
        queryParams += (key + "=" + value);
    }

    public void addFormParam(String key, String value) {
        if (formParams.length() > 0) {
            formParams += "&";
        }
        formParams += (key + "=" + value);
    }

    public void addPathParam(String param) {
        pathParams += "/" + param;
    }
}