package org.fox.ttrss;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Typeface;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.text.Html;
import android.util.TypedValue;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.webkit.WebBackForwardList;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebView.HitTestResult;
import android.widget.FrameLayout;
import android.widget.TextView;

import com.shamanland.fab.ShowHideOnScroll;

import org.fox.ttrss.types.Article;
import org.fox.ttrss.types.Attachment;
import org.fox.ttrss.util.TypefaceCache;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class ArticleFragment extends Fragment  {
	private final String TAG = this.getClass().getSimpleName();

	private SharedPreferences m_prefs;
	private Article m_article;
	private HeadlinesActivity m_activity;
    private WebView m_web;
    protected View m_customView;
    protected FrameLayout m_customViewContainer;
    protected View m_contentView;
    protected FSVideoChromeClient m_chromeClient;
    protected View m_fab;

	public void initialize(Article article) {
		m_article = article;
	}

    private class FSVideoChromeClient extends WebChromeClient {
        //protected View m_videoChildView;

        private CustomViewCallback m_callback;

        public FSVideoChromeClient(View container) {
            super();

        }

        @Override
        public void onShowCustomView(View view, CustomViewCallback callback) {
            m_activity.getSupportActionBar().hide();

            // if a view already exists then immediately terminate the new one
            if (m_customView != null) {
                callback.onCustomViewHidden();
                return;
            }
            m_customView = view;
            m_contentView.setVisibility(View.GONE);

            m_customViewContainer.setVisibility(View.VISIBLE);
            m_customViewContainer.addView(view);

            if (m_fab != null) m_fab.setVisibility(View.GONE);

            m_activity.showSidebar(false);

            m_callback = callback;
        }

        @Override
        public void onHideCustomView() {
            super.onHideCustomView();

            m_activity.getSupportActionBar().show();

            if (m_customView == null)
                return;

            m_contentView.setVisibility(View.VISIBLE);
            m_customViewContainer.setVisibility(View.GONE);

            // Hide the custom view.
            m_customView.setVisibility(View.GONE);

            // Remove the custom view from its container.
            m_customViewContainer.removeView(m_customView);
            m_callback.onCustomViewHidden();

            if (m_fab != null && m_prefs.getBoolean("enable_article_fab", true))
                m_fab.setVisibility(View.VISIBLE);

            m_customView = null;

            m_activity.showSidebar(true);
        }
    }

	//private View.OnTouchListener m_gestureListener;

	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
	    ContextMenuInfo menuInfo) {

		if (v.getId() == R.id.article_content) {
			HitTestResult result = ((WebView)v).getHitTestResult();

			if (result != null && (result.getType() == HitTestResult.IMAGE_TYPE || result.getType() == HitTestResult.SRC_IMAGE_ANCHOR_TYPE)) {

				menu.setHeaderTitle(result.getExtra());
				getActivity().getMenuInflater().inflate(R.menu.article_content_img_context_menu, menu);
				
				/* FIXME I have no idea how to do this correctly ;( */
				
				m_activity.setLastContentImageHitTestUrl(result.getExtra());
				
			} else {
				menu.setHeaderTitle(m_article.title);
				getActivity().getMenuInflater().inflate(R.menu.article_link_context_menu, menu);
			}
		} else {
			menu.setHeaderTitle(m_article.title);
			getActivity().getMenuInflater().inflate(R.menu.article_link_context_menu, menu);
		}
		
		super.onCreateContextMenu(menu, v, menuInfo);		
		
	}
	
	@SuppressLint("NewApi")
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, final Bundle savedInstanceState) {

		if (savedInstanceState != null) {
			m_article = savedInstanceState.getParcelable("article");
            //m_fsviewShown = savedInstanceState.getBoolean("fsviewShown");
		}

		final View view = inflater.inflate(R.layout.article_fragment, container, false);

        /* if (m_fsviewShown) {
            view.findViewById(R.id.article_fullscreen_video).setVisibility(View.VISIBLE);
            view.findViewById(R.id.article_scrollview).setVisibility(View.INVISIBLE);
        } */

        m_contentView = view.findViewById(R.id.article_scrollview);
        m_customViewContainer = (FrameLayout) view.findViewById(R.id.article_fullscreen_video);

        View scrollView = view.findViewById(R.id.article_scrollview);
        m_fab = view.findViewById(R.id.article_fab);

        if (scrollView != null && m_fab != null) {
            if (m_prefs.getBoolean("enable_article_fab", true)) {
                scrollView.setOnTouchListener(new ShowHideOnScroll(m_fab));

                m_fab.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        try {
                            URL url = new URL(m_article.link.trim());
                            String uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(),
                                    url.getPort(), url.getPath(), url.getQuery(), url.getRef()).toString();
                            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
                            startActivity(intent);
                        } catch (Exception e) {
                            e.printStackTrace();
                            m_activity.toast(R.string.error_other_error);
                        }
                    }
                });
            } else {
                m_fab.setVisibility(View.GONE);
            }
        }

        final int articleFontSize = Integer.parseInt(m_prefs.getString("article_font_size_sp", "16"));
        final int articleSmallFontSize = Math.max(10, Math.min(18, articleFontSize - 2));

        TextView title = (TextView)view.findViewById(R.id.title);

        if (title != null) {

            if (m_prefs.getBoolean("enable_condensed_fonts", false)) {
                Typeface tf = TypefaceCache.get(m_activity, "sans-serif-condensed", Typeface.NORMAL);

                if (tf != null && !tf.equals(title.getTypeface())) {
                    title.setTypeface(tf);
                }

                title.setTextSize(TypedValue.COMPLEX_UNIT_SP, Math.min(21, articleFontSize + 5));
            } else {
                title.setTextSize(TypedValue.COMPLEX_UNIT_SP, Math.min(21, articleFontSize + 3));
            }

            String titleStr;

            if (m_article.title.length() > 200)
                titleStr = m_article.title.substring(0, 200) + "...";
            else
                titleStr = m_article.title;

            title.setText(Html.fromHtml(titleStr));
            //title.setPaintFlags(title.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);
            title.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    try {
                        URL url = new URL(m_article.link.trim());
                        String uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(),
                                url.getPort(), url.getPath(), url.getQuery(), url.getRef()).toString();
                        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
                        startActivity(intent);
                    } catch (Exception e) {
                        e.printStackTrace();
                        m_activity.toast(R.string.error_other_error);
                    }
                }
            });

            registerForContextMenu(title);
        }

        TextView comments = (TextView)view.findViewById(R.id.comments);

        if (comments != null) {
            if (m_activity.getApiLevel() >= 4 && m_article.comments_count > 0) {
                comments.setTextSize(TypedValue.COMPLEX_UNIT_SP, articleSmallFontSize);

                String commentsTitle = getResources().getQuantityString(R.plurals.article_comments, m_article.comments_count, m_article.comments_count);
                comments.setText(commentsTitle);
                //comments.setPaintFlags(title.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);
                comments.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        try {
                            URL url = new URL((m_article.comments_link != null && m_article.comments_link.length() > 0) ?
                                    m_article.comments_link : m_article.link);
                            String uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(),
                                    url.getPort(), url.getPath(), url.getQuery(), url.getRef()).toString();
                            Intent intent = new Intent(Intent.ACTION_VIEW,
                                    Uri.parse(uri));
                            startActivity(intent);
                        } catch (Exception e) {
                            e.printStackTrace();
                            m_activity.toast(R.string.error_other_error);
                        }
                    }
                });

            } else {
                comments.setVisibility(View.GONE);
            }
        }

        TextView note = (TextView)view.findViewById(R.id.note);

        if (note != null) {
            if (m_article.note != null && !"".equals(m_article.note)) {
                note.setTextSize(TypedValue.COMPLEX_UNIT_SP, articleSmallFontSize);
                note.setText(m_article.note);
            } else {
                note.setVisibility(View.GONE);
            }

        }

        m_web = (WebView)view.findViewById(R.id.article_content);

        TextView dv = (TextView)view.findViewById(R.id.date);

        if (dv != null) {
            dv.setTextSize(TypedValue.COMPLEX_UNIT_SP, articleSmallFontSize);

            Date d = new Date(m_article.updated * 1000L);
            DateFormat df = new SimpleDateFormat("MMM dd, HH:mm");
            dv.setText(df.format(d));
        }

        TextView author = (TextView)view.findViewById(R.id.author);

        boolean hasAuthor = false;

        if (author != null) {
            author.setTextSize(TypedValue.COMPLEX_UNIT_SP, articleSmallFontSize);

            if (m_article.author != null && m_article.author.length() > 0) {
                author.setText(getString(R.string.author_formatted, m_article.author));
            } else {
                author.setVisibility(View.GONE);
            }
            hasAuthor = true;
        }

        TextView tagv = (TextView)view.findViewById(R.id.tags);

        if (tagv != null) {
            tagv.setTextSize(TypedValue.COMPLEX_UNIT_SP, articleSmallFontSize);

            if (m_article.feed_title != null) {
                String fTitle = m_article.feed_title;

                if (!hasAuthor && m_article.author != null && m_article.author.length() > 0) {
                    fTitle += " (" + getString(R.string.author_formatted, m_article.author) + ")";
                }

                tagv.setText(fTitle);
            } else if (m_article.tags != null) {
                String tagsStr = "";

                for (String tag : m_article.tags)
                    tagsStr += tag + ", ";

                tagsStr = tagsStr.replaceAll(", $", "");

                tagv.setText(tagsStr);
            } else {
                tagv.setVisibility(View.GONE);
            }
        }

        if (m_article != null) {

            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {

                    if (m_web != null) {

                        m_web.setOnLongClickListener(new View.OnLongClickListener() {
                            @Override
                            public boolean onLongClick(View v) {
                                HitTestResult result = ((WebView)v).getHitTestResult();

                                if (result != null && (result.getType() == HitTestResult.IMAGE_TYPE || result.getType() == HitTestResult.SRC_IMAGE_ANCHOR_TYPE)) {
                                    registerForContextMenu(m_web);
                                    m_activity.openContextMenu(m_web);
                                    unregisterForContextMenu(m_web);
                                    return true;
                                } else {
                                    return false;
                                }
                            }
                        });

                        boolean acceleratedWebview = true;

                        // prevent flicker in ics
                        if (!m_prefs.getBoolean("webview_hardware_accel", true)) {
                            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
                                m_web.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
                                acceleratedWebview = false;
                            }
                        }

                        String content;
                        String cssOverride = "";

                        WebSettings ws = m_web.getSettings();
                        ws.setSupportZoom(false);

                        TypedValue tvBackground = new TypedValue();
                        getActivity().getTheme().resolveAttribute(R.attr.articleBackground, tvBackground, true);

                        String backgroundHexColor = String.format("#%06X", (0xFFFFFF & tvBackground.data));

                        cssOverride = "body { background : "+ backgroundHexColor+"; }";

                        TypedValue tvTextColor = new TypedValue();
                        getActivity().getTheme().resolveAttribute(R.attr.articleTextColor, tvTextColor, true);

                        String textColor = String.format("#%06X", (0xFFFFFF & tvTextColor.data));

                        cssOverride += "body { color : "+textColor+"; }";

                        TypedValue tvLinkColor = new TypedValue();
                        getActivity().getTheme().resolveAttribute(R.attr.linkColor, tvLinkColor, true);

                        String linkHexColor = String.format("#%06X", (0xFFFFFF & tvLinkColor.data));
                        cssOverride += " a:link {color: "+linkHexColor+";} a:visited { color: "+linkHexColor+";}";

                        String articleContent = m_article.content != null ? m_article.content : "";

                        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                            ws.setJavaScriptEnabled(true);

                            m_chromeClient = new FSVideoChromeClient(view);
                            m_web.setWebChromeClient(m_chromeClient);
                        }

                        if (m_prefs.getBoolean("justify_article_text", true)) {
                            cssOverride += "body { text-align : justify; } ";
                        }

                        ws.setDefaultFontSize(articleFontSize);

                        content =
                                "<html>" +
                                        "<head>" +
                                        "<meta content=\"text/html; charset=utf-8\" http-equiv=\"content-type\">" +
                                        "<meta name=\"viewport\" content=\"width=device-width, user-scalable=no\" />" +
                                        "<style type=\"text/css\">" +
                                        "body { padding : 0px; margin : 0px; line-height : 130%; }" +
                                        "img, video, iframe { max-width : 100%; width : auto; height : auto; }" +
                                        " table { width : 100%; }" +
                                        cssOverride +
                                        "</style>" +
                                        "</head>" +
                                        "<body>" + articleContent;

                        if (m_article.attachments != null && m_article.attachments.size() != 0) {
                            String flatContent = articleContent.replaceAll("[\r\n]", "");
                            boolean hasImages = flatContent.matches(".*?<img[^>+].*?");

                            for (Attachment a : m_article.attachments) {
                                if (a.content_type != null && a.content_url != null) {
                                    try {
                                        if (a.content_type.indexOf("image") != -1 &&
                                                (!hasImages || m_article.always_display_attachments)) {

                                            URL url = new URL(a.content_url.trim());
                                            String strUrl = url.toString().trim();

                                            content += "<p><img src=\"" + strUrl.replace("\"", "\\\"") + "\"></p>";
                                        }

                                    } catch (MalformedURLException e) {
                                        //
                                    } catch (Exception e) {
                                        e.printStackTrace();
                                    }
                                }
                            }
                        }

                        content += "</body></html>";

                        try {
                            String baseUrl = null;

                            try {
                                URL url = new URL(m_article.link);
                                baseUrl = url.getProtocol() + "://" + url.getHost();
                            } catch (MalformedURLException e) {
                                //
                            }

                            if (savedInstanceState == null || !acceleratedWebview) {
                                m_web.loadDataWithBaseURL(baseUrl, content, "text/html", "utf-8", null);
                            } else {
                                WebBackForwardList rc = m_web.restoreState(savedInstanceState);

                                if (rc == null) {
                                    // restore failed...
                                    m_web.loadDataWithBaseURL(baseUrl, content, "text/html", "utf-8", null);
                                }
                            }

                        } catch (RuntimeException e) {
                            e.printStackTrace();
                        }

//				if (m_activity.isSmallScreen())
//					web.setOnTouchListener(m_gestureListener);

                        m_web.setVisibility(View.VISIBLE);
                    }

                }
            }, 100);

        }

		return view;    	
	}

    @Override
    public void onPause() {
        super.onPause();

        m_web.onPause();
    }

    @Override
    public void onResume() {
        super.onResume();

        m_web.onResume();
    }

    public boolean inCustomView() {
        return (m_customView != null);
    }

    @Override
    public void onStop() {
        super.onStop();

        if (inCustomView()) {
            hideCustomView();
        }
    }

    public void hideCustomView() {
        if (m_chromeClient != null) {
            m_chromeClient.onHideCustomView();
        }
    }

	@Override
	public void onDestroy() {
		super.onDestroy();		
	}
	
	@Override
	public void onSaveInstanceState (Bundle out) {		
		super.onSaveInstanceState(out);

		out.setClassLoader(getClass().getClassLoader());
		out.putParcelable("article", m_article);
	}

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);		
		
		m_prefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
		m_activity = (HeadlinesActivity)activity;

	}
}