/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.widget;

import com.android.internal.R;

import android.content.AsyncQueryHandler;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.res.TypedArray;
import android.database.Cursor;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.provider.ContactsContract.CommonDataKinds.Email;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.Intents;
import android.provider.ContactsContract.PhoneLookup;
import android.provider.ContactsContract.QuickContact;
import android.provider.ContactsContract.RawContacts;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;

/**
 * Widget used to show an image with the standard QuickContact badge
 * and on-click behavior.
 */
public class QuickContactBadge extends ImageView implements OnClickListener {
    private Uri mContactUri;
    private String mContactEmail;
    private String mContactPhone;
    private Drawable mOverlay;
    private QueryHandler mQueryHandler;
    private Drawable mDefaultAvatar;

    protected String[] mExcludeMimes = null;

    static final private int TOKEN_EMAIL_LOOKUP = 0;
    static final private int TOKEN_PHONE_LOOKUP = 1;
    static final private int TOKEN_EMAIL_LOOKUP_AND_TRIGGER = 2;
    static final private int TOKEN_PHONE_LOOKUP_AND_TRIGGER = 3;

    static final String[] EMAIL_LOOKUP_PROJECTION = new String[] {
        RawContacts.CONTACT_ID,
        Contacts.LOOKUP_KEY,
    };
    static final int EMAIL_ID_COLUMN_INDEX = 0;
    static final int EMAIL_LOOKUP_STRING_COLUMN_INDEX = 1;

    static final String[] PHONE_LOOKUP_PROJECTION = new String[] {
        PhoneLookup._ID,
        PhoneLookup.LOOKUP_KEY,
    };
    static final int PHONE_ID_COLUMN_INDEX = 0;
    static final int PHONE_LOOKUP_STRING_COLUMN_INDEX = 1;

    public QuickContactBadge(Context context) {
        this(context, null);
    }

    public QuickContactBadge(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public QuickContactBadge(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
        mOverlay = styledAttributes.getDrawable(
                com.android.internal.R.styleable.Theme_quickContactBadgeOverlay);
        styledAttributes.recycle();

        mQueryHandler = new QueryHandler(mContext.getContentResolver());
        setOnClickListener(this);
    }

    @Override
    protected void drawableStateChanged() {
        super.drawableStateChanged();
        if (mOverlay != null && mOverlay.isStateful()) {
            mOverlay.setState(getDrawableState());
            invalidate();
        }
    }

    /** This call has no effect anymore, as there is only one QuickContact mode */
    @SuppressWarnings("unused")
    public void setMode(int size) {
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        if (!isEnabled()) {
            // not clickable? don't show triangle
            return;
        }

        if (mOverlay == null || mOverlay.getIntrinsicWidth() == 0 ||
                mOverlay.getIntrinsicHeight() == 0) {
            // nothing to draw
            return;
        }

        mOverlay.setBounds(0, 0, getWidth(), getHeight());

        if (mPaddingTop == 0 && mPaddingLeft == 0) {
            mOverlay.draw(canvas);
        } else {
            int saveCount = canvas.getSaveCount();
            canvas.save();
            canvas.translate(mPaddingLeft, mPaddingTop);
            mOverlay.draw(canvas);
            canvas.restoreToCount(saveCount);
        }
    }

    /** True if a contact, an email address or a phone number has been assigned */
    private boolean isAssigned() {
        return mContactUri != null || mContactEmail != null || mContactPhone != null;
    }

    /**
     * Resets the contact photo to the default state.
     */
    public void setImageToDefault() {
        if (mDefaultAvatar == null) {
            mDefaultAvatar = getResources().getDrawable(R.drawable.ic_contact_picture);
        }
        setImageDrawable(mDefaultAvatar);
    }

    /**
     * Assign the contact uri that this QuickContactBadge should be associated
     * with. Note that this is only used for displaying the QuickContact window and
     * won't bind the contact's photo for you. Call {@link #setImageDrawable(Drawable)} to set the
     * photo.
     *
     * @param contactUri Either a {@link Contacts#CONTENT_URI} or
     *            {@link Contacts#CONTENT_LOOKUP_URI} style URI.
     */
    public void assignContactUri(Uri contactUri) {
        mContactUri = contactUri;
        mContactEmail = null;
        mContactPhone = null;
        onContactUriChanged();
    }

    /**
     * Assign a contact based on an email address. This should only be used when
     * the contact's URI is not available, as an extra query will have to be
     * performed to lookup the URI based on the email.
     *
     * @param emailAddress The email address of the contact.
     * @param lazyLookup If this is true, the lookup query will not be performed
     * until this view is clicked.
     */
    public void assignContactFromEmail(String emailAddress, boolean lazyLookup) {
        mContactEmail = emailAddress;
        if (!lazyLookup) {
            mQueryHandler.startQuery(TOKEN_EMAIL_LOOKUP, null,
                    Uri.withAppendedPath(Email.CONTENT_LOOKUP_URI, Uri.encode(mContactEmail)),
                    EMAIL_LOOKUP_PROJECTION, null, null, null);
        } else {
            mContactUri = null;
            onContactUriChanged();
        }
    }

    /**
     * Assign a contact based on a phone number. This should only be used when
     * the contact's URI is not available, as an extra query will have to be
     * performed to lookup the URI based on the phone number.
     *
     * @param phoneNumber The phone number of the contact.
     * @param lazyLookup If this is true, the lookup query will not be performed
     * until this view is clicked.
     */
    public void assignContactFromPhone(String phoneNumber, boolean lazyLookup) {
        mContactPhone = phoneNumber;
        if (!lazyLookup) {
            mQueryHandler.startQuery(TOKEN_PHONE_LOOKUP, null,
                    Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI, mContactPhone),
                    PHONE_LOOKUP_PROJECTION, null, null, null);
        } else {
            mContactUri = null;
            onContactUriChanged();
        }
    }

    private void onContactUriChanged() {
        setEnabled(isAssigned());
    }

    @Override
    public void onClick(View v) {
        if (mContactUri != null) {
            QuickContact.showQuickContact(getContext(), QuickContactBadge.this, mContactUri,
                    QuickContact.MODE_LARGE, mExcludeMimes);
        } else if (mContactEmail != null) {
            mQueryHandler.startQuery(TOKEN_EMAIL_LOOKUP_AND_TRIGGER, mContactEmail,
                    Uri.withAppendedPath(Email.CONTENT_LOOKUP_URI, Uri.encode(mContactEmail)),
                    EMAIL_LOOKUP_PROJECTION, null, null, null);
        } else if (mContactPhone != null) {
            mQueryHandler.startQuery(TOKEN_PHONE_LOOKUP_AND_TRIGGER, mContactPhone,
                    Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI, mContactPhone),
                    PHONE_LOOKUP_PROJECTION, null, null, null);
        } else {
            // If a contact hasn't been assigned, don't react to click.
            return;
        }
    }

    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        event.setClassName(QuickContactBadge.class.getName());
    }

    @Override
    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
        super.onInitializeAccessibilityNodeInfo(info);
        info.setClassName(QuickContactBadge.class.getName());
    }

    /**
     * Set a list of specific MIME-types to exclude and not display. For
     * example, this can be used to hide the {@link Contacts#CONTENT_ITEM_TYPE}
     * profile icon.
     */
    public void setExcludeMimes(String[] excludeMimes) {
        mExcludeMimes = excludeMimes;
    }

    private class QueryHandler extends AsyncQueryHandler {

        public QueryHandler(ContentResolver cr) {
            super(cr);
        }

        @Override
        protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
            Uri lookupUri = null;
            Uri createUri = null;
            boolean trigger = false;

            try {
                switch(token) {
                    case TOKEN_PHONE_LOOKUP_AND_TRIGGER:
                        trigger = true;
                        createUri = Uri.fromParts("tel", (String)cookie, null);

                        //$FALL-THROUGH$
                    case TOKEN_PHONE_LOOKUP: {
                        if (cursor != null && cursor.moveToFirst()) {
                            long contactId = cursor.getLong(PHONE_ID_COLUMN_INDEX);
                            String lookupKey = cursor.getString(PHONE_LOOKUP_STRING_COLUMN_INDEX);
                            lookupUri = Contacts.getLookupUri(contactId, lookupKey);
                        }

                        break;
                    }
                    case TOKEN_EMAIL_LOOKUP_AND_TRIGGER:
                        trigger = true;
                        createUri = Uri.fromParts("mailto", (String)cookie, null);

                        //$FALL-THROUGH$
                    case TOKEN_EMAIL_LOOKUP: {
                        if (cursor != null && cursor.moveToFirst()) {
                            long contactId = cursor.getLong(EMAIL_ID_COLUMN_INDEX);
                            String lookupKey = cursor.getString(EMAIL_LOOKUP_STRING_COLUMN_INDEX);
                            lookupUri = Contacts.getLookupUri(contactId, lookupKey);
                        }
                        break;
                    }
                }
            } finally {
                if (cursor != null) {
                    cursor.close();
                }
            }

            mContactUri = lookupUri;
            onContactUriChanged();

            if (trigger && lookupUri != null) {
                // Found contact, so trigger QuickContact
                QuickContact.showQuickContact(getContext(), QuickContactBadge.this, lookupUri,
                        QuickContact.MODE_LARGE, mExcludeMimes);
            } else if (createUri != null) {
                // Prompt user to add this person to contacts
                final Intent intent = new Intent(Intents.SHOW_OR_CREATE_CONTACT, createUri);
                getContext().startActivity(intent);
            }
        }
    }
}