package de.thedevstack.android.nextcloud.bookmark.share.rest;

import android.util.Base64;
import android.util.Log;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.nio.charset.StandardCharsets;

import javax.net.ssl.HttpsURLConnection;

/**
 */
public class NextcloudBookmarkRestClient {
    private static final String LOGTAG = "NCBookmarkRestClient";
    private static final String BOOKMARK_APP_REST_API = "/apps/bookmarks/public/rest/v2/bookmark";
    private final String username;
    private final String password;
    private final String serverUrl;
    private final String restApiBaseUrl;
    private HttpsURLConnection urlConnection;

    public NextcloudBookmarkRestClient(String serverUrl, String username, String password) {
        this.serverUrl = serverUrl;
        this.username = username;
        this.password = password;
        this.restApiBaseUrl = serverUrl + BOOKMARK_APP_REST_API;
    }

    private void openConnection(String url) throws IOException {
        this.urlConnection = (HttpsURLConnection) new URL(url).openConnection();
        String encoded = Base64.encodeToString((this.username+":"+this.password).getBytes(StandardCharsets.UTF_8), 0);
        this.urlConnection.setRequestProperty("Authorization", "Basic "+encoded);
    }

    public boolean checkCredentials() {
        Log.d(LOGTAG, "checking credentials");
        boolean validCredentials = false;
        try {
            this.openConnection(this.restApiBaseUrl);
            this.urlConnection.setRequestMethod("HEAD");
            this.urlConnection.connect();
            validCredentials = 401 != this.urlConnection.getResponseCode();
            Log.d(LOGTAG, "credentials are " + validCredentials);
        } catch (IOException e) {
            System.out.println(e.getMessage());
        } finally {
            if (null != this.urlConnection) {
                this.urlConnection.disconnect();
            }
            return validCredentials;
        }
    }

    public int addBookmark(String bookmarkUrl) {
        Log.d(LOGTAG, "trying to add bookmark for '" + bookmarkUrl + "'");
        int responseCode = -1;
        StringBuffer sb = new StringBuffer();
        InputStream is = null;

        try {
            this.openConnection(this.restApiBaseUrl + "?url=" + bookmarkUrl);
            this.urlConnection.setRequestMethod("POST");
            this.urlConnection.connect();

            is = new BufferedInputStream(urlConnection.getInputStream());
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String inputLine = "";
            while ((inputLine = br.readLine()) != null) {
                sb.append(inputLine);
            }
            Log.d(LOGTAG, sb.toString());

            responseCode = this.urlConnection.getResponseCode();
        } catch (Exception e) {
            Log.e(LOGTAG, "Error while trying to add bookmark: " + e.getMessage());
        }
        finally {
            Log.i(LOGTAG, "disconnecting...");
            if (null != this.urlConnection) {
                this.urlConnection.disconnect();
            }

            if (is != null) {
                try {
                    is.close();
                }
                catch (IOException e) {
                    Log.d(LOGTAG, "Error closing InputStream");
                }
            }

            return responseCode;
        }
    }
}