package com.myapp.com.webviewapp.fragment;

import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.net.MailTo;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.myapp.com.webviewapp.R;
import com.myapp.com.webviewapp.WebViewAppConfig;
import com.myapp.com.webviewapp.task.TaskFragment;
import com.myapp.com.webviewapp.utility.DownloadUtility;
import com.myapp.com.webviewapp.utility.Logcat;
import com.myapp.com.webviewapp.utility.NetworkManager;
import com.myapp.com.webviewapp.view.ViewState;


public class MainFragment extends TaskFragment implements SwipeRefreshLayout.OnRefreshListener
{
	private static final String ARGUMENT_URL = "url";
	private static final String ARGUMENT_SHARE = "share";

	private boolean mActionBarProgress = false;
	private ViewState mViewState = null;
	private View mRootView;
	private String mUrl = "about:blank";
	private String mShare;
	private boolean mLocal = false;


	public static MainFragment newInstance(String url, String share)
	{
		MainFragment fragment = new MainFragment();

		// arguments
		Bundle arguments = new Bundle();
		arguments.putString(ARGUMENT_URL, url);
		arguments.putString(ARGUMENT_SHARE, share);
		fragment.setArguments(arguments);

		return fragment;
	}


	@Override
	public void onAttach(Activity activity)
	{
		super.onAttach(activity);
	}


	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);

		setHasOptionsMenu(true);
		setRetainInstance(true);

		// handle fragment arguments
		Bundle arguments = getArguments();
		if(arguments != null)
		{
			handleArguments(arguments);
		}
	}


	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
	{
		mRootView = inflater.inflate(R.layout.fragment_main, container, false);
		return mRootView;
	}


	@Override
	public void onActivityCreated(Bundle savedInstanceState)
	{
		super.onActivityCreated(savedInstanceState);

		// restore webview state
		if(savedInstanceState!=null)
		{
			WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
			webView.restoreState(savedInstanceState);
		}

		// setup webview
		renderView();

		webView.getSettings().setUserAgentString("my-app");


		// pull to refresh
		SwipeRefreshLayout swipeRefreshLayout = (SwipeRefreshLayout) mRootView.findViewById(R.id.container_swipe_refresh);
		swipeRefreshLayout.setColorSchemeResources(R.color.global_bg_front_inverse, R.color.global_bg_front, R.color.global_bg_front_inverse, R.color.global_bg_front);
		swipeRefreshLayout.setOnRefreshListener(this);

		// load and show data
		if(mViewState==null || mViewState==ViewState.OFFLINE)

		{
			loadData();
		}
		else if(mViewState==ViewState.CONTENT)
		{
			showContent();
		}
		else if(mViewState==ViewState.PROGRESS)
		{
			showContent();
		}
		else if(mViewState==ViewState.EMPTY)
		{
			showEmpty();
		}

		// progress in action bar
		showActionBarProgress(mActionBarProgress);
	}


	@Override
	public void onStart()
	{
		super.onStart();
	}


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


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


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


	@Override
	public void onDestroyView()
	{
		super.onDestroyView();
		mRootView = null;
	}


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


	@Override
	public void onDetach()
	{
		super.onDetach();
	}


	@Override
	public void onSaveInstanceState(Bundle outState)
	{
		// save current instance state
		super.onSaveInstanceState(outState);
		setUserVisibleHint(true);

		// save webview state
		WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
		webView.saveState(outState);
	}


	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
	{
		// action bar menu
		super.onCreateOptionsMenu(menu, inflater);
		inflater.inflate(R.menu.menu_main, menu);

		// show or hide share button
		MenuItem share = menu.findItem(R.id.ab_button_share);
		share.setVisible(mShare!=null && !mShare.trim().equals(""));
	}


	@Override
	public boolean onOptionsItemSelected(MenuItem item)
	{
		// action bar menu behaviour
		switch(item.getItemId())
		{
			case R.id.ab_button_share:
				startShareActivity(getString(R.string.app_name), mShare);
				return true;

			default:
				return super.onOptionsItemSelected(item);
		}
	}


	@Override
	public void onRefresh()
	{
		runTaskCallback(new Runnable()
		{
			@Override
			public void run()
			{
				refreshData();
			}
		});
	}


	private void handleArguments(Bundle arguments)
	{
		if(arguments.containsKey(ARGUMENT_URL))
		{
			mUrl = arguments.getString(ARGUMENT_URL);
			mLocal = mUrl.contains("file://");
		}
		if(arguments.containsKey(ARGUMENT_SHARE))
		{
			mShare = arguments.getString(ARGUMENT_SHARE);
		}
	}


	private void loadData()
	{
		if(NetworkManager.isOnline(getActivity()) || mLocal)
		{
			// show progress
			showProgress();

			// load web url
			WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
			webView.loadUrl(mUrl);
		}
		else
		{
			showOffline();
		}
	}


	public void refreshData()
	{
		if(NetworkManager.isOnline(getActivity()) || mLocal)
		{
			// show progress in action bar
			showActionBarProgress(true);

			// load web url
			WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
			webView.loadUrl(webView.getUrl());
		}
		else
		{
			showActionBarProgress(false);
			Toast.makeText(getActivity(), R.string.global_offline_toast, Toast.LENGTH_LONG).show();
		}
	}


	private void showActionBarProgress(boolean visible)
	{
		// show pull to refresh progress bar
		SwipeRefreshLayout swipeRefreshLayout = (SwipeRefreshLayout) mRootView.findViewById(R.id.container_swipe_refresh);

		swipeRefreshLayout.setRefreshing(visible);
		swipeRefreshLayout.setEnabled(!visible);

		mActionBarProgress = visible;
	}


	private void showContent()
	{
		// show content container
		ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
		ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
		ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
		ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
		containerContent.setVisibility(View.VISIBLE);
		containerProgress.setVisibility(View.GONE);
		containerOffline.setVisibility(View.GONE);
		containerEmpty.setVisibility(View.GONE);
		mViewState = ViewState.CONTENT;
	}


	private void showContent(final long delay)
	{
		final Handler timerHandler = new Handler();
		final Runnable timerRunnable = new Runnable()
		{
			@Override
			public void run()
			{
				runTaskCallback(new Runnable()
				{
					public void run()
					{
						if(getActivity()!=null && mRootView!=null)
						{
							Logcat.d("Fragment.timerRunnable()");
							showContent();
						}
					}
				});
			}
		};
		timerHandler.postDelayed(timerRunnable, delay);
	}


	private void showProgress()
	{
		// show progress container
		ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
		ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
		ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
		ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
		containerContent.setVisibility(View.GONE);
		containerProgress.setVisibility(View.VISIBLE);
		containerOffline.setVisibility(View.GONE);
		containerEmpty.setVisibility(View.GONE);
		mViewState = ViewState.PROGRESS;
	}


	private void showOffline()
	{
		// show offline container
		ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
		ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
		ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
		ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
		containerContent.setVisibility(View.GONE);
		containerProgress.setVisibility(View.GONE);
		containerOffline.setVisibility(View.VISIBLE);
		containerEmpty.setVisibility(View.GONE);
		mViewState = ViewState.OFFLINE;
	}


	private void showEmpty()
	{
		// show empty container
		ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
		ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
		ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
		ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
		containerContent.setVisibility(View.GONE);
		containerProgress.setVisibility(View.GONE);
		containerOffline.setVisibility(View.GONE);
		containerEmpty.setVisibility(View.VISIBLE);
		mViewState = ViewState.EMPTY;
	}


	private void renderView()
	{
		// reference
		final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
		final AdView adView = (AdView) mRootView.findViewById(R.id.fragment_main_adview);

		// webview settings
		webView.getSettings().setBuiltInZoomControls(false);
		webView.getSettings().setSupportZoom(true);
		webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
		webView.getSettings().setJavaScriptEnabled(true);
		webView.setBackgroundColor(getResources().getColor(R.color.global_bg_front));
		webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY); // fixes scrollbar on Froyo
		webView.setWebChromeClient(new WebChromeClient()); // http://stackoverflow.com/questions/8541443/whats-causing-this-nullpointerexception
		webView.setWebViewClient(new WebViewClient()
		{
			@Override
			public void onPageFinished(final WebView view, final String url)
			{
				runTaskCallback(new Runnable()
				{
					public void run()
					{
						if(getActivity()!=null)
						{
							showContent(500); // hide progress bar with delay to show webview content smoothly
							showActionBarProgress(false);
						}
					}
				});
			}


			@Override
			public void onReceivedError(final WebView view, final int errorCode, final String description, final String failingUrl)
			{
				runTaskCallback(new Runnable()
				{
					public void run()
					{
						if(getActivity()!=null)
						{
							showEmpty();
							showActionBarProgress(false);
						}
					}
				});
			}


			@Override
			public boolean shouldOverrideUrlLoading(WebView view, String url)
			{
				if(DownloadUtility.isDownloadableFile(url))
				{
					Toast.makeText(getActivity(), R.string.fragment_main_downloading, Toast.LENGTH_LONG).show();
					DownloadUtility.downloadFile(getActivity(), url, DownloadUtility.getFileName(url));
					return true;
				}
				else if(url!=null && url.startsWith("https://play.google.com/store/"))
				{
					startWebActivity(url);
					return true;
				}
				else if(url!=null && (url.startsWith("http://") || url.startsWith("https://")))
				{
					if(WebViewAppConfig.OPEN_LINKS_IN_EXTERNAL_BROWSER)
					{
						startWebActivity(url);
						return true;
					}
					else
					{
						showActionBarProgress(true);
						return false;
					}
				}
				else if(url!=null && url.startsWith("mailto:"))
				{
					MailTo mailTo = MailTo.parse(url);
					startEmailActivity(mailTo.getTo(), mailTo.getSubject(), mailTo.getBody());
					return true;
				}
				else if(url!=null && url.startsWith("tel:"))
				{
					startCallActivity(url);
					return true;
				}
				else if(url!=null && url.startsWith("sms:"))
				{
					startSmsActivity(url);
					return true;
				}
				else if(url!=null && url.startsWith("geo:"))
				{
					startMapSearchActivity(url);
					return true;
				}
				else
				{
					return false;
				}
			}
		});
		webView.setOnKeyListener(new View.OnKeyListener()
		{
			@Override
			public boolean onKey(View v, int keyCode, KeyEvent event)
			{
				if(event.getAction() == KeyEvent.ACTION_DOWN)
				{
					WebView webView = (WebView) v;

					switch(keyCode)
					{
						case KeyEvent.KEYCODE_BACK:
							if(webView.canGoBack())
							{
								webView.goBack();
								return true;
							}
							break;
					}
				}

				return false;
			}
		});
		webView.requestFocus(View.FOCUS_DOWN); // http://android24hours.blogspot.cz/2011/12/android-soft-keyboard-not-showing-on.html
		webView.setOnTouchListener(new View.OnTouchListener()
		{
			@Override
			public boolean onTouch(View v, MotionEvent event)
			{
				switch(event.getAction())
				{
					case MotionEvent.ACTION_DOWN:
					case MotionEvent.ACTION_UP:
						if(!v.hasFocus())
						{
							v.requestFocus();
						}
						break;
				}

				return false;
			}
		});

		// admob
		if(WebViewAppConfig.ADMOB && NetworkManager.isOnline(getActivity()))
		{
			AdRequest adRequest = new AdRequest.Builder()
					.addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
					.addTestDevice(getString(R.string.admob_test_device_id))
					.build();
			adView.loadAd(adRequest);
			adView.setVisibility(View.VISIBLE);
		}
		else
		{
			adView.setVisibility(View.GONE);
		}
	}


	private void controlBack()
	{
		final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
		if(webView.canGoBack()) webView.goBack();
	}


	private void controlForward()
	{
		final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
		if(webView.canGoForward()) webView.goForward();
	}


	private void controlStop()
	{
		final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
		webView.stopLoading();
	}


	private void controlReload()
	{
		final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
		webView.reload();
	}


	private void startWebActivity(String url)
	{
		try
		{
			Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
			startActivity(intent);
		}
		catch(ActivityNotFoundException e)
		{
			// can't start activity
		}
	}


	private void startEmailActivity(String email, String subject, String text)
	{
		try
		{
			StringBuilder builder = new StringBuilder();
			builder.append("mailto:");
			builder.append(email);

			Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(builder.toString()));
			intent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
			intent.putExtra(android.content.Intent.EXTRA_TEXT, text);
			startActivity(intent);
		}
		catch(ActivityNotFoundException e)
		{
			// can't start activity
		}
	}


	private void startCallActivity(String url)
	{
		try
		{
			Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
			startActivity(intent);
		}
		catch(ActivityNotFoundException e)
		{
			// can't start activity
		}
	}


	private void startSmsActivity(String url)
	{
		try
		{
			Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(url));
			startActivity(intent);
		}
		catch(ActivityNotFoundException e)
		{
			// can't start activity
		}
	}


	private void startMapSearchActivity(String url)
	{
		try
		{
			Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(url));
			startActivity(intent);
		}
		catch(android.content.ActivityNotFoundException e)
		{
			// can't start activity
		}
	}


	private void startShareActivity(String subject, String text)
	{
		try
		{
			Intent intent = new Intent(android.content.Intent.ACTION_SEND);
			intent.setType("text/plain");
			intent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
			intent.putExtra(android.content.Intent.EXTRA_TEXT, text);
			startActivity(intent);
		}
		catch(android.content.ActivityNotFoundException e)
		{
			// can't start activity
		}
	}
}