package eu.siacs.conversations.ui.adapter;

import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.Typeface;
import android.net.Uri;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ForegroundColorSpan;
import android.text.style.StyleSpan;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.util.List;

import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Downloadable;
import eu.siacs.conversations.entities.DownloadableFile;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.entities.Message.ImageParams;
import eu.siacs.conversations.ui.ConversationActivity;
import eu.siacs.conversations.utils.UIHelper;
import eu.siacs.conversations.xmpp.jid.Jid;

public class MessageAdapter extends ArrayAdapter<Message> {

	private static final int SENT = 0;
	private static final int RECEIVED = 1;
	private static final int STATUS = 2;
	private static final int NULL = 3;

	private ConversationActivity activity;

	private DisplayMetrics metrics;

	private OnContactPictureClicked mOnContactPictureClickedListener;
	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;

	private OnLongClickListener openContextMenu = new OnLongClickListener() {
		
		@Override
		public boolean onLongClick(View v) {
			v.showContextMenu();
			return true;
		}
	};
	
	public MessageAdapter(ConversationActivity activity, List<Message> messages) {
		super(activity, 0, messages);
		this.activity = activity;
		metrics = getContext().getResources().getDisplayMetrics();
	}

	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
		this.mOnContactPictureClickedListener = listener;
	}

	public void setOnContactPictureLongClicked(
			OnContactPictureLongClicked listener) {
		this.mOnContactPictureLongClickedListener = listener;
	}

	@Override
	public int getViewTypeCount() {
		return 4;
	}

	@Override
	public int getItemViewType(int position) {
		if (getItem(position).wasMergedIntoPrevious()) {
			return NULL;
		} else if (getItem(position).getType() == Message.TYPE_STATUS) {
			return STATUS;
		} else if (getItem(position).getStatus() <= Message.STATUS_RECEIVED) {
			return RECEIVED;
		} else {
			return SENT;
		}
	}

	private void displayStatus(ViewHolder viewHolder, Message message) {
		String filesize = null;
		String info = null;
		boolean error = false;
		if (viewHolder.indicatorReceived != null) {
			viewHolder.indicatorReceived.setVisibility(View.GONE);
		}
		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
				&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getDownloadable() != null) {
			ImageParams params = message.getImageParams();
			if (params.size > (1.5 * 1024 * 1024)) {
				filesize = params.size / (1024 * 1024)+ " MB";
			} else if (params.size > 0) {
				filesize = params.size / 1024 + " KB";
			}
			if (message.getDownloadable() != null && message.getDownloadable().getStatus() == Downloadable.STATUS_FAILED) {
				error = true;
			}
		}
		switch (message.getMergedStatus()) {
		case Message.STATUS_WAITING:
			info = getContext().getString(R.string.waiting);
			break;
		case Message.STATUS_UNSEND:
			Downloadable d = message.getDownloadable();
			if (d!=null) {
				info = getContext().getString(R.string.sending_file,d.getProgress());
			} else {
				info = getContext().getString(R.string.sending);
			}
			break;
		case Message.STATUS_OFFERED:
			info = getContext().getString(R.string.offering);
			break;
		case Message.STATUS_SEND_RECEIVED:
			if (activity.indicateReceived()) {
				viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
			}
			break;
		case Message.STATUS_SEND_DISPLAYED:
			if (activity.indicateReceived()) {
				viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
			}
			break;
		case Message.STATUS_SEND_FAILED:
			info = getContext().getString(R.string.send_failed);
			error = true;
			break;
		default:
			if (multiReceived) {
				Contact contact = message.getContact();
				if (contact != null) {
					info = contact.getDisplayName();
				} else {
					info = getDisplayedMucCounterpart(message.getCounterpart());
				}
			}
			break;
		}
		if (error) {
			viewHolder.time.setTextColor(activity.getWarningTextColor());
		} else {
			viewHolder.time.setTextColor(activity.getSecondaryTextColor());
		}
		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
			viewHolder.indicator.setVisibility(View.GONE);
		} else {
			viewHolder.indicator.setVisibility(View.VISIBLE);
		}

		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(),
				message.getMergedTimeSent());
		if (message.getStatus() <= Message.STATUS_RECEIVED) {
			if ((filesize != null) && (info != null)) {
				viewHolder.time.setText(filesize + " \u00B7 " + info);
			} else if ((filesize == null) && (info != null)) {
				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
			} else if ((filesize != null) && (info == null)) {
				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize);
			} else {
				viewHolder.time.setText(formatedTime);
			}
		} else {
			if ((filesize != null) && (info != null)) {
				viewHolder.time.setText(filesize + " \u00B7 " + info);
			} else if ((filesize == null) && (info != null)) {
				if (error) {
					viewHolder.time.setText(info + " \u00B7 " + formatedTime);
				} else {
					viewHolder.time.setText(info);
				}
			} else if ((filesize != null) && (info == null)) {
				viewHolder.time.setText(filesize + " \u00B7 " + formatedTime);
			} else {
				viewHolder.time.setText(formatedTime);
			}
		}
	}

	private void displayInfoMessage(ViewHolder viewHolder, String text) {
		if (viewHolder.download_button != null) {
			viewHolder.download_button.setVisibility(View.GONE);
		}
		viewHolder.image.setVisibility(View.GONE);
		viewHolder.messageBody.setVisibility(View.VISIBLE);
		viewHolder.messageBody.setText(text);
		viewHolder.messageBody.setTextColor(activity.getSecondaryTextColor());
		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
		viewHolder.messageBody.setTextIsSelectable(false);
	}

	private void displayDecryptionFailed(ViewHolder viewHolder) {
		if (viewHolder.download_button != null) {
			viewHolder.download_button.setVisibility(View.GONE);
		}
		viewHolder.image.setVisibility(View.GONE);
		viewHolder.messageBody.setVisibility(View.VISIBLE);
		viewHolder.messageBody.setText(getContext().getString(
				R.string.decryption_failed));
		viewHolder.messageBody.setTextColor(activity.getWarningTextColor());
		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
		viewHolder.messageBody.setTextIsSelectable(false);
	}

	private void displayTextMessage(ViewHolder viewHolder, Message message) {
		if (viewHolder.download_button != null) {
			viewHolder.download_button.setVisibility(View.GONE);
		}
		viewHolder.image.setVisibility(View.GONE);
		viewHolder.messageBody.setVisibility(View.VISIBLE);
		if (message.getBody() != null) {
			if (message.getType() != Message.TYPE_PRIVATE) {
				viewHolder.messageBody.setText(message.getMergedBody());
			} else {
				String privateMarker;
				if (message.getStatus() <= Message.STATUS_RECEIVED) {
					privateMarker = activity
							.getString(R.string.private_message);
				} else {
					final String to;
					if (message.getCounterpart() != null) {
						to = message.getCounterpart().getResourcepart();
					} else {
						to = "";
					}
					privateMarker = activity.getString(R.string.private_message_to, to);
				}
				SpannableString span = new SpannableString(privateMarker + " "
						+ message.getBody());
				span.setSpan(
						new ForegroundColorSpan(activity
								.getSecondaryTextColor()), 0, privateMarker
								.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
				span.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), 0,
						privateMarker.length(),
						Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
				viewHolder.messageBody.setText(span);
			}
		} else {
			viewHolder.messageBody.setText("");
		}
		viewHolder.messageBody.setTextColor(activity.getPrimaryTextColor());
		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
		viewHolder.messageBody.setTextIsSelectable(true);
	}

	private void displayDownloadableMessage(ViewHolder viewHolder,
			final Message message, String text) {
		viewHolder.image.setVisibility(View.GONE);
		viewHolder.messageBody.setVisibility(View.GONE);
		viewHolder.download_button.setVisibility(View.VISIBLE);
		viewHolder.download_button.setText(text);
		viewHolder.download_button.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				startDownloadable(message);
			}
		});
		viewHolder.download_button.setOnLongClickListener(openContextMenu);
	}

	private void displayOpenableMessage(ViewHolder viewHolder,final Message message) {
		final DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
		viewHolder.image.setVisibility(View.GONE);
		viewHolder.messageBody.setVisibility(View.GONE);
		viewHolder.download_button.setVisibility(View.VISIBLE);
		viewHolder.download_button.setText(activity.getString(R.string.open_file,file.getMimeType()));
		viewHolder.download_button.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				openDownloadable(file);
			}
		});
		viewHolder.download_button.setOnLongClickListener(openContextMenu);
	}

	private void displayImageMessage(ViewHolder viewHolder,
			final Message message) {
		if (viewHolder.download_button != null) {
			viewHolder.download_button.setVisibility(View.GONE);
		}
		viewHolder.messageBody.setVisibility(View.GONE);
		viewHolder.image.setVisibility(View.VISIBLE);
		ImageParams params = message.getImageParams();
		double target = metrics.density * 288;
		int scalledW;
		int scalledH;
		if (params.width <= params.height) {
			scalledW = (int) (params.width / ((double) params.height / target));
			scalledH = (int) target;
		} else {
			scalledW = (int) target;
			scalledH = (int) (params.height / ((double) params.width / target));
		}
		viewHolder.image.setLayoutParams(new LinearLayout.LayoutParams(
				scalledW, scalledH));
		activity.loadBitmap(message, viewHolder.image);
		viewHolder.image.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				Intent intent = new Intent(Intent.ACTION_VIEW);
				intent.setDataAndType(activity.xmppConnectionService
						.getFileBackend().getJingleFileUri(message), "image/*");
				getContext().startActivity(intent);
			}
		});
		viewHolder.image.setOnLongClickListener(openContextMenu);
	}

	private String getDisplayedMucCounterpart(final Jid counterpart) {
		if (counterpart==null) {
			return "";
		} else if (!counterpart.isBareJid()) {
			return counterpart.getResourcepart();
		} else {
			return counterpart.toString();
		}
	}

	@Override
	public View getView(int position, View view, ViewGroup parent) {
		final Message message = getItem(position);
		final Conversation conversation = message.getConversation();
		final Account account = conversation.getAccount();
		final int type = getItemViewType(position);
		ViewHolder viewHolder;
		if (view == null) {
			viewHolder = new ViewHolder();
			switch (type) {
			case NULL:
				view = activity.getLayoutInflater().inflate(
						R.layout.message_null, parent, false);
				break;
			case SENT:
				view = activity.getLayoutInflater().inflate(
						R.layout.message_sent, parent, false);
				viewHolder.message_box = (LinearLayout) view
						.findViewById(R.id.message_box);
				viewHolder.contact_picture = (ImageView) view
						.findViewById(R.id.message_photo);
				viewHolder.download_button = (Button) view
						.findViewById(R.id.download_button);
				viewHolder.indicator = (ImageView) view
						.findViewById(R.id.security_indicator);
				viewHolder.image = (ImageView) view
						.findViewById(R.id.message_image);
				viewHolder.messageBody = (TextView) view
						.findViewById(R.id.message_body);
				viewHolder.time = (TextView) view
						.findViewById(R.id.message_time);
				viewHolder.indicatorReceived = (ImageView) view
						.findViewById(R.id.indicator_received);
				break;
			case RECEIVED:
				view = activity.getLayoutInflater().inflate(
						R.layout.message_received, parent, false);
				viewHolder.message_box = (LinearLayout) view
						.findViewById(R.id.message_box);
				viewHolder.contact_picture = (ImageView) view
						.findViewById(R.id.message_photo);
				viewHolder.download_button = (Button) view
						.findViewById(R.id.download_button);
				viewHolder.indicator = (ImageView) view
						.findViewById(R.id.security_indicator);
				viewHolder.image = (ImageView) view
						.findViewById(R.id.message_image);
				viewHolder.messageBody = (TextView) view
						.findViewById(R.id.message_body);
				viewHolder.time = (TextView) view
						.findViewById(R.id.message_time);
				viewHolder.indicatorReceived = (ImageView) view
						.findViewById(R.id.indicator_received);
				break;
			case STATUS:
				view = activity.getLayoutInflater().inflate(
						R.layout.message_status, parent, false);
				viewHolder.contact_picture = (ImageView) view
						.findViewById(R.id.message_photo);
				break;
			default:
				viewHolder = null;
				break;
			}
			view.setTag(viewHolder);
		} else {
			viewHolder = (ViewHolder) view.getTag();
			if (viewHolder == null) {
				return view;
			}
		}

		if (type == STATUS) {
			if (conversation.getMode() == Conversation.MODE_SINGLE) {
				viewHolder.contact_picture.setImageBitmap(activity
						.avatarService().get(conversation.getContact(),
								activity.getPixel(32)));
				viewHolder.contact_picture.setAlpha(0.5f);
				viewHolder.contact_picture
						.setOnClickListener(new OnClickListener() {

							@Override
							public void onClick(View v) {
								String name = conversation.getName();
								String read = getContext()
										.getString(
												R.string.contact_has_read_up_to_this_point,
												name);
								Toast.makeText(getContext(), read,
										Toast.LENGTH_SHORT).show();
							}
						});

			}
			return view;
		} else if (type == NULL) {
			if (position == getCount() - 1) {
				view.getLayoutParams().height = 1;
			} else {
				view.getLayoutParams().height = 0;

			}
			view.setLayoutParams(view.getLayoutParams());
			return view;
		} else if (viewHolder.messageBody == null || viewHolder.image == null) {
			return view; //avoiding weird platform bugs
		} else if (type == RECEIVED) {
			Contact contact = message.getContact();
			if (contact != null) {
				viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(contact, activity.getPixel(48)));
			} else if (conversation.getMode() == Conversation.MODE_MULTI) {
				viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(getDisplayedMucCounterpart(message.getCounterpart()),
                        activity.getPixel(48)));
			}
		} else if (type == SENT) {
			viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(account, activity.getPixel(48)));
		}

		viewHolder.contact_picture
				.setOnClickListener(new OnClickListener() {

					@Override
					public void onClick(View v) {
						if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
							MessageAdapter.this.mOnContactPictureClickedListener
									.onContactPictureClicked(message);
						}

					}
				});
		viewHolder.contact_picture
				.setOnLongClickListener(new OnLongClickListener() {

					@Override
					public boolean onLongClick(View v) {
						if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
							MessageAdapter.this.mOnContactPictureLongClickedListener
									.onContactPictureLongClicked(message);
							return true;
						} else {
							return false;
						}
					}
				});

		if (message.getDownloadable() != null && message.getDownloadable().getStatus() != Downloadable.STATUS_UPLOADING) {
			Downloadable d = message.getDownloadable();
			if (d.getStatus() == Downloadable.STATUS_DOWNLOADING) {
				if (message.getType() == Message.TYPE_FILE) {
					displayInfoMessage(viewHolder,activity.getString(R.string.receiving_file,d.getMimeType(),d.getProgress()));
				} else {
					displayInfoMessage(viewHolder,activity.getString(R.string.receiving_image,d.getProgress()));
				}
			} else if (d.getStatus() == Downloadable.STATUS_CHECKING) {
				displayInfoMessage(viewHolder,activity.getString(R.string.checking_image));
			} else if (d.getStatus() == Downloadable.STATUS_DELETED) {
				if (message.getType() == Message.TYPE_FILE) {
					displayInfoMessage(viewHolder, activity.getString(R.string.file_deleted));
				} else {
					displayInfoMessage(viewHolder, activity.getString(R.string.image_file_deleted));
				}
			} else if (d.getStatus() == Downloadable.STATUS_OFFER) {
				if (message.getType() == Message.TYPE_FILE) {
					displayDownloadableMessage(viewHolder,message,activity.getString(R.string.download_file,d.getMimeType()));
				} else {
					displayDownloadableMessage(viewHolder, message,activity.getString(R.string.download_image));
				}
			} else if (d.getStatus() == Downloadable.STATUS_OFFER_CHECK_FILESIZE) {
				displayDownloadableMessage(viewHolder, message,activity.getString(R.string.check_image_filesize));
			} else if (d.getStatus() == Downloadable.STATUS_FAILED) {
				if (message.getType() == Message.TYPE_FILE) {
					displayInfoMessage(viewHolder, activity.getString(R.string.file_transmission_failed));
				} else {
					displayInfoMessage(viewHolder, activity.getString(R.string.image_transmission_failed));
				}
			}
		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
			displayImageMessage(viewHolder, message);
		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
			if (message.getImageParams().width > 0) {
				displayImageMessage(viewHolder,message);
			} else {
				displayOpenableMessage(viewHolder, message);
			}
		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
			if (activity.hasPgp()) {
				displayInfoMessage(viewHolder,activity.getString(R.string.encrypted_message));
			} else {
				displayInfoMessage(viewHolder,
						activity.getString(R.string.install_openkeychain));
				if (viewHolder != null) {
					viewHolder.message_box
							.setOnClickListener(new OnClickListener() {

								@Override
								public void onClick(View v) {
									activity.showInstallPgpDialog();
								}
							});
				}
			}
		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
			displayDecryptionFailed(viewHolder);
		} else {
			displayTextMessage(viewHolder, message);
		}

		displayStatus(viewHolder, message);

		return view;
	}

	public void startDownloadable(Message message) {
		Downloadable downloadable = message.getDownloadable();
		if (downloadable != null) {
			if (!downloadable.start()) {
				Toast.makeText(activity, R.string.not_connected_try_again,
						Toast.LENGTH_SHORT).show();
			}
		}
	}

	public void openDownloadable(DownloadableFile file) {
		if (!file.exists()) {
			Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
			return;
		}
		Intent openIntent = new Intent(Intent.ACTION_VIEW);
		openIntent.setDataAndType(Uri.fromFile(file), file.getMimeType());
		PackageManager manager = activity.getPackageManager();
		List<ResolveInfo> infos = manager.queryIntentActivities(openIntent, 0);
		if (infos.size() > 0) {
			getContext().startActivity(openIntent);
		} else {
			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
		}
	}

	public interface OnContactPictureClicked {
		public void onContactPictureClicked(Message message);
	}

	public interface OnContactPictureLongClicked {
		public void onContactPictureLongClicked(Message message);
	}

	private static class ViewHolder {

		protected LinearLayout message_box;
		protected Button download_button;
		protected ImageView image;
		protected ImageView indicator;
		protected ImageView indicatorReceived;
		protected TextView time;
		protected TextView messageBody;
		protected ImageView contact_picture;

	}
}