package com.rarchives.ripme.ripper.rippers;

import java.awt.Desktop;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.net.ssl.SSLException;
import javax.swing.JOptionPane;

import org.json.JSONArray;
import org.json.JSONObject;

import com.rarchives.ripme.ripper.AbstractJSONRipper;
import com.rarchives.ripme.ui.RipStatusMessage.STATUS;
import com.rarchives.ripme.utils.Http;

public class MediacrushRipper extends AbstractJSONRipper {

    /** Ordered list of preferred formats, sorted by preference (low-to-high) */
    private static final Map<String, Integer> PREFERRED_FORMATS = new HashMap<String,Integer>();
    static {
        PREFERRED_FORMATS.put("mp4", 0);
        PREFERRED_FORMATS.put("wemb",1);
        PREFERRED_FORMATS.put("ogv", 2);
        PREFERRED_FORMATS.put("mp3", 3);
        PREFERRED_FORMATS.put("ogg", 4);
        PREFERRED_FORMATS.put("gif", 5);
        PREFERRED_FORMATS.put("png", 6);
        PREFERRED_FORMATS.put("jpg", 7);
        PREFERRED_FORMATS.put("jpeg",8);
    };

    public MediacrushRipper(URL url) throws IOException {
        super(url);
    }

    @Override
    public String getHost() {
        return "mediacrush";
    }
    @Override
    public String getDomain() {
        return "mediacru.sh";
    }

    @Override
    public String getGID(URL url) throws MalformedURLException {
        Pattern p = Pattern.compile("https?://[wm.]*mediacru\\.sh/([a-zA-Z0-9]+).*");
        Matcher m = p.matcher(url.toExternalForm());
        if (m.matches()) {
            return m.group(1);
        }
        throw new MalformedURLException("Could not find mediacru.sh page ID from " + url
                 + " expected format: http://mediacru.sh/pageid");
    }

    @Override
    public URL sanitizeURL(URL url) throws MalformedURLException {
        String u = url.toExternalForm();
        // Strip trailing "/" characters
        while (u.endsWith("/")) {
            u = u.substring(0, u.length() - 1);
        }
        // Append .json
        if (!u.endsWith(".json")) {
            u += ".json";
        }
        return new URL(u);
    }

    @Override
    public JSONObject getFirstPage() throws IOException {
        try {
            String jsonString = Http.url(url)
                                    .ignoreContentType()
                                    .connection()
                                    .execute().body();
            jsonString = jsonString.replace("&quot;", "\"");
            return new JSONObject(jsonString);
        } catch (SSLException re) {
            // Check for >1024 bit encryption but in older versions of Java
            // It's the bug. Suggest downloading the latest version.
            int selection = JOptionPane.showOptionDialog(null,
                    "You need to upgrade to the latest Java (7+) to rip this album.\n"
                            + "Do you want to open java.com and download the latest version?",
                            "RipMe - Java Error",
                            JOptionPane.OK_CANCEL_OPTION,
                            JOptionPane.ERROR_MESSAGE,
                            null,
                            new String[] {"Go to java.com", "Cancel"},
                            0);
            sendUpdate(STATUS.RIP_ERRORED, "Your version of Java can't handle some secure websites");
            if (selection == 0) {
                URL javaUrl = new URL("https://www.java.com/en/download/");
                try {
                    Desktop.getDesktop().browse(javaUrl.toURI());
                } catch (URISyntaxException use) { }
            }
            throw new IOException("Cannot rip due to limitations in Java installation, consider upgrading Java", re.getCause());
        }
        catch (Exception e) {
            throw new IOException("Unexpected error: " + e.getMessage(), e);
        }
    }

    @Override
    public List<String> getURLsFromJSON(JSONObject json) {
        List<String> imageURLs = new ArrayList<String>();
        // Iterate over all files
        JSONArray files = json.getJSONArray("files");
        for (int i = 0; i < files.length(); i++) {
            JSONObject file = (JSONObject) files.get(i);
            // Find preferred file format
            JSONArray subfiles = file.getJSONArray("files");
            String preferredUrl = getPreferredUrl(subfiles);
            if (preferredUrl == null) {
                logger.warn("Could not find 'file' inside of " + file);
                sendUpdate(STATUS.DOWNLOAD_ERRORED, "Could not find file inside of " + file);
                continue;
            }

            imageURLs.add(preferredUrl);
        }
        return imageURLs;
    }

    @Override
    public void downloadURL(URL url, int index) {
        addURLToDownload(url, getPrefix(index));
    }

    /**
     * Iterates over list if "file" objects and returns the preferred 
     * image format.
     * @param subfiles Array of "files" (JSONObjects) which contain 
     * @return Preferred media format.
     */
    private String getPreferredUrl(JSONArray subfiles) {
        String preferredUrl = null;
        int preferredIndex = Integer.MAX_VALUE;
        // Iterate over all media types
        for (int j = 0; j < subfiles.length(); j++) {
            JSONObject subfile = subfiles.getJSONObject(j);
            String thisurl = subfile.getString("url");
            String extension = thisurl.substring(thisurl.lastIndexOf(".") + 1);
            if (!PREFERRED_FORMATS.containsKey(extension)) {
                continue;
            }
            // Keep track of the most-preferred format
            int thisindex = PREFERRED_FORMATS.get(extension);
            if (preferredUrl == null || thisindex < preferredIndex) {
                preferredIndex = thisindex;
                preferredUrl = thisurl;
            }
        }
        return preferredUrl;
    }
}