/**
 * Copyright (C) 2011 Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.thoughtcrime.securesms;

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Typeface;
import android.net.Uri;
import android.os.Build;
import android.os.Handler;
import android.provider.Contacts.Intents;
import android.provider.ContactsContract.QuickContact;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.format.DateUtils;
import android.text.style.ForegroundColorSpan;
import android.text.style.StyleSpan;
import android.util.AttributeSet;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.QuickContactBadge;
import android.widget.RelativeLayout;
import android.widget.TextView;

import org.thoughtcrime.securesms.database.model.ThreadRecord;
import org.thoughtcrime.securesms.recipients.Recipient;
import org.thoughtcrime.securesms.recipients.Recipients;

import java.util.Set;

/**
 * A view that displays the element in a list of multiple conversation threads.
 * Used by SecureSMS's ListActivity via a ConversationListAdapter.
 *
 * @author Moxie Marlinspike
 */

public class ConversationListItem extends RelativeLayout
                                  implements Recipient.RecipientModifiedListener
{

  private Context           context;
  private Set<Long>         selectedThreads;
  private Recipients        recipients;
  private long              threadId;
  private TextView          subjectView;
  private TextView          fromView;
  private TextView          dateView;
  private CheckBox          checkbox;
  private long              count;
  private boolean           read;

  private ImageView         contactPhotoImage;
  private QuickContactBadge contactPhotoBadge;

  private final Handler handler = new Handler();

  public ConversationListItem(Context context) {
    super(context);
    this.context = context;
  }

  public ConversationListItem(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.context = context;
  }

  @Override
  protected void onFinishInflate() {
    this.subjectView     = (TextView)findViewById(R.id.subject);
    this.fromView        = (TextView)findViewById(R.id.from);
    this.dateView        = (TextView)findViewById(R.id.date);
    this.checkbox        = (CheckBox)findViewById(R.id.checkbox);

    this.contactPhotoBadge = (QuickContactBadge)findViewById(R.id.contact_photo_badge);
    this.contactPhotoImage = (ImageView)findViewById(R.id.contact_photo_image);

    initializeContactWidgetVisibility();
    intializeListeners();
  }

  public void set(ThreadRecord thread, Set<Long> selectedThreads, boolean batchMode) {
    this.selectedThreads = selectedThreads;
    this.recipients      = thread.getRecipients();
    this.threadId        = thread.getThreadId();
    this.count           = thread.getCount();
    this.read            = thread.isRead();

    this.recipients.addListener(this);
    this.fromView.setText(formatFrom(recipients, count, read));

    if (thread.isKeyExchange())
      this.subjectView.setText(R.string.ConversationListItem_key_exchange_message,
                               TextView.BufferType.SPANNABLE);
    else
      this.subjectView.setText(thread.getBody(), TextView.BufferType.SPANNABLE);

    if (thread.getEmphasis())
      ((Spannable)this.subjectView.getText()).setSpan(new StyleSpan(android.graphics.Typeface.ITALIC), 0,
                                                                    this.subjectView.getText().length(),
                                                                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    if (thread.getDate() > 0)
      this.dateView.setText(DateUtils.getRelativeTimeSpanString(getContext(), thread.getDate(), false));

    if (selectedThreads != null)
      this.checkbox.setChecked(selectedThreads.contains(threadId));

    if (batchMode) checkbox.setVisibility(View.VISIBLE);
    else           checkbox.setVisibility(View.GONE);

    setBackground(read, batchMode);
    setContactPhoto(this.recipients.getPrimaryRecipient());
  }

  public void unbind() {
    this.recipients.removeListener(this);
  }

  private void intializeListeners() {
    checkbox.setOnCheckedChangeListener(new CheckedChangedListener());
  }

  private void initializeContactWidgetVisibility() {
    if (isBadgeEnabled()) {
      contactPhotoBadge.setVisibility(View.VISIBLE);
      contactPhotoImage.setVisibility(View.GONE);
    } else {
      contactPhotoBadge.setVisibility(View.GONE);
      contactPhotoImage.setVisibility(View.VISIBLE);
    }
  }

  private void setContactPhoto(final Recipient recipient) {
    if (recipient == null) return;

    if (isBadgeEnabled()) {
      contactPhotoBadge.setImageBitmap(recipient.getContactPhoto());
      contactPhotoBadge.assignContactFromPhone(recipient.getNumber(), true);
    } else {
      contactPhotoImage.setImageBitmap(recipient.getContactPhoto());
      contactPhotoImage.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          if (recipient.getContactUri() != null) {
            QuickContact.showQuickContact(context, contactPhotoImage, recipient.getContactUri(), QuickContact.MODE_LARGE, null);
          } else {
            Intent intent = new Intent(Intents.SHOW_OR_CREATE_CONTACT,  Uri.fromParts("tel", recipient.getNumber(), null));
            context.startActivity(intent);
          }
        }
      });
    }
  }

  private void setBackground(boolean read, boolean batch) {
    if (batch && checkbox.isChecked()) {
      setBackgroundResource(R.drawable.list_selected_holo_light);
    } else if (read) {
      setBackgroundResource(R.drawable.conversation_list_item_background_read);
    } else {
      setBackgroundResource(R.drawable.conversation_list_item_background_unread);
    }
  }

  private boolean isBadgeEnabled() {
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
  }

  private CharSequence formatFrom(Recipients from, long count, boolean read) {
    String fromString              = from.toShortString();
    SpannableStringBuilder builder = new SpannableStringBuilder(fromString);

    if (count > 0) {
      builder.append(" " + count);
      builder.setSpan(new ForegroundColorSpan(Color.parseColor("#66333333")),
                      fromString.length(), builder.length(),
                      Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
    }

    if (!read) {
      builder.setSpan(new StyleSpan(Typeface.BOLD), 0, builder.length(),
                      Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
    }

    return builder;
  }

  public Recipients getRecipients() {
    return recipients;
  }

  public long getThreadId() {
    return threadId;
  }

  private class CheckedChangedListener implements CompoundButton.OnCheckedChangeListener {
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
      if (isChecked) selectedThreads.add(threadId);
      else           selectedThreads.remove(threadId);

      setBackground(read, true);
    }
  }

  @Override
  public void onModified(Recipient recipient) {
    handler.post(new Runnable() {
      @Override
      public void run() {
        ConversationListItem.this.fromView.setText(formatFrom(recipients, count, read));
        setContactPhoto(ConversationListItem.this.recipients.getPrimaryRecipient());
      }
    });
  }
}