/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

package org.mozilla.gecko;

import org.mozilla.gecko.util.HardwareUtils;

import org.json.JSONException;
import org.json.JSONObject;

import android.content.res.Resources;
import android.graphics.drawable.BitmapDrawable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TextView;

/**
 * SiteIdentityPopup is a singleton class that displays site identity data in
 * an arrow panel popup hanging from the lock icon in the browser toolbar.
 */
public class SiteIdentityPopup extends PopupWindow {
    private static final String LOGTAG = "GeckoSiteIdentityPopup";

    public static final String UNKNOWN = "unknown";
    public static final String VERIFIED = "verified";
    public static final String IDENTIFIED = "identified";

    private static SiteIdentityPopup sInstance;

    private Resources mResources;
    private boolean mInflated;

    private TextView mHost;
    private TextView mOwner;
    private TextView mSupplemental;
    private TextView mVerifier;
    private TextView mEncrypted;

    private ImageView mLarry;
    private ImageView mArrow;

    private int mYOffset;

    private SiteIdentityPopup() {
        super(GeckoApp.mAppContext);

        mResources = GeckoApp.mAppContext.getResources();
        mYOffset = mResources.getDimensionPixelSize(R.dimen.menu_popup_offset);
        mInflated = false;
    }

    public static synchronized SiteIdentityPopup getInstance() {
        if (sInstance == null) {
            sInstance = new SiteIdentityPopup();
        }
        return sInstance;
    }

    public static synchronized void clearInstance() {
        sInstance = null;
    }

    private void init() {
        setBackgroundDrawable(new BitmapDrawable());
        setOutsideTouchable(true);
        setWindowLayoutMode(HardwareUtils.isTablet() ? LayoutParams.WRAP_CONTENT : LayoutParams.FILL_PARENT,
                LayoutParams.WRAP_CONTENT);

        LayoutInflater inflater = LayoutInflater.from(GeckoApp.mAppContext);
        RelativeLayout layout = (RelativeLayout) inflater.inflate(R.layout.site_identity_popup, null);
        setContentView(layout);

        mHost = (TextView) layout.findViewById(R.id.host);
        mOwner = (TextView) layout.findViewById(R.id.owner);
        mVerifier = (TextView) layout.findViewById(R.id.verifier);

        mLarry = (ImageView) layout.findViewById(R.id.larry);
        mArrow = (ImageView) layout.findViewById(R.id.arrow);

        mInflated = true;
    }

    public void show(View v) {
        Tab selectedTab = Tabs.getInstance().getSelectedTab();
        if (selectedTab == null) {
            Log.e(LOGTAG, "Selected tab is null");
            return;
        }

        JSONObject identityData = selectedTab.getIdentityData();
        if (identityData == null) {
            Log.e(LOGTAG, "Tab has no identity data");
            return;
        }

        String mode;
        try {
            mode = identityData.getString("mode");
        } catch (JSONException e) {
            Log.e(LOGTAG, "Exception trying to get identity mode", e);
            return;
        }

        if (!mode.equals(VERIFIED) && !mode.equals(IDENTIFIED)) {
            Log.e(LOGTAG, "Can't show site identity popup in non-identified state");
            return;
        }

        if (!mInflated)
            init();

        try {
            String host = identityData.getString("host");
            mHost.setText(host);

            String owner = identityData.getString("owner");

            try {
                String supplemental = identityData.getString("supplemental");
                owner += "\n" + supplemental;
            } catch (JSONException e) { }

            mOwner.setText(owner);

            String verifier = identityData.getString("verifier");
            String encrypted = identityData.getString("encrypted");
            mVerifier.setText(verifier + "\n" + encrypted);
        } catch (JSONException e) {
            Log.e(LOGTAG, "Exception trying to get identity data", e);
            return;
        }

        if (mode.equals(VERIFIED)) {
            // Use a blue theme for SSL
            mLarry.setImageResource(R.drawable.larry_blue);
            mHost.setTextColor(mResources.getColor(R.color.identity_verified));
            mOwner.setTextColor(mResources.getColor(R.color.identity_verified));
        } else {
            // Use a green theme for EV
            mLarry.setImageResource(R.drawable.larry_green);
            mHost.setTextColor(mResources.getColor(R.color.identity_identified));
            mOwner.setTextColor(mResources.getColor(R.color.identity_identified));
        }

        int[] anchorLocation = new int[2];
        v.getLocationOnScreen(anchorLocation);

        int arrowWidth = mResources.getDimensionPixelSize(R.dimen.menu_popup_arrow_width);
        int leftMargin = anchorLocation[0] + (v.getWidth() - arrowWidth) / 2;

        int offset = 0;
        if (HardwareUtils.isTablet()) {
            int popupWidth = mResources.getDimensionPixelSize(R.dimen.popup_width);
            offset = 0 - popupWidth + arrowWidth*3/2 + v.getWidth()/2;
        }

        LayoutParams layoutParams = (LayoutParams) mArrow.getLayoutParams();
        layoutParams.setMargins(leftMargin, 0, 0, 0);

        showAsDropDown(v, offset, -mYOffset);
    }
}