/*
 * 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 android.annotation.UnsupportedAppUsage;
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.os.Bundle;
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 com.android.internal.R;

/**
 * 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;
    @UnsupportedAppUsage
    private Drawable mOverlay;
    private QueryHandler mQueryHandler;
    private Drawable mDefaultAvatar;
    private Bundle mExtras = null;
    private String mPrioritizedMimeType;

    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 private String EXTRA_URI_CONTENT = "uri_content";

    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 defStyleAttr) {
        this(context, attrs, defStyleAttr, 0);
    }

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

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

        setOnClickListener(this);
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();

        if (!isInEditMode()) {
            mQueryHandler = new QueryHandler(mContext.getContentResolver());
        }
    }

    @Override
    protected void drawableStateChanged() {
        super.drawableStateChanged();

        final Drawable overlay = mOverlay;
        if (overlay != null && overlay.isStateful()
                && overlay.setState(getDrawableState())) {
            invalidateDrawable(overlay);
        }
    }

    @Override
    public void drawableHotspotChanged(float x, float y) {
        super.drawableHotspotChanged(x, y);

        if (mOverlay != null) {
            mOverlay.setHotspot(x, y);
        }
    }

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

    /**
     * Set which mimetype should be prioritized in the QuickContacts UI. For example, passing the
     * value {@link Email#CONTENT_ITEM_TYPE} can cause emails to be displayed more prominently in
     * QuickContacts.
     */
    public void setPrioritizedMimeType(String prioritizedMimeType) {
        mPrioritizedMimeType = prioritizedMimeType;
    }

    @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 = mContext.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) {
        assignContactFromEmail(emailAddress, lazyLookup, null);
    }

    /**
     * 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.
     @param extras A bundle of extras to populate the contact edit page with if the contact
     is not found and the user chooses to add the email address to an existing contact or
     create a new contact. Uses the same string constants as those found in
     {@link android.provider.ContactsContract.Intents.Insert}
    */

    public void assignContactFromEmail(String emailAddress, boolean lazyLookup, Bundle extras) {
        mContactEmail = emailAddress;
        mExtras = extras;
        if (!lazyLookup && mQueryHandler != null) {
            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) {
        assignContactFromPhone(phoneNumber, lazyLookup, new Bundle());
    }

    /**
     * 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.
     * @param extras A bundle of extras to populate the contact edit page with if the contact
     * is not found and the user chooses to add the phone number to an existing contact or
     * create a new contact. Uses the same string constants as those found in
     * {@link android.provider.ContactsContract.Intents.Insert}
     */
    public void assignContactFromPhone(String phoneNumber, boolean lazyLookup, Bundle extras) {
        mContactPhone = phoneNumber;
        mExtras = extras;
        if (!lazyLookup && mQueryHandler != null) {
            mQueryHandler.startQuery(TOKEN_PHONE_LOOKUP, null,
                    Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI, mContactPhone),
                    PHONE_LOOKUP_PROJECTION, null, null, null);
        } else {
            mContactUri = null;
            onContactUriChanged();
        }
    }

    /**
     * Assigns the drawable that is to be drawn on top of the assigned contact photo.
     *
     * @param overlay Drawable to be drawn over the assigned contact photo. Must have a non-zero
     *         instrinsic width and height.
     */
    public void setOverlay(Drawable overlay) {
        mOverlay = overlay;
    }

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

    @Override
    public void onClick(View v) {
        // If contact has been assigned, mExtras should no longer be null, but do a null check
        // anyway just in case assignContactFromPhone or Email was called with a null bundle or
        // wasn't assigned previously.
        final Bundle extras = (mExtras == null) ? new Bundle() : mExtras;
        if (mContactUri != null) {
            QuickContact.showQuickContact(getContext(), QuickContactBadge.this, mContactUri,
                    mExcludeMimes, mPrioritizedMimeType);
        } else if (mContactEmail != null && mQueryHandler != null) {
            extras.putString(EXTRA_URI_CONTENT, mContactEmail);
            mQueryHandler.startQuery(TOKEN_EMAIL_LOOKUP_AND_TRIGGER, extras,
                    Uri.withAppendedPath(Email.CONTENT_LOOKUP_URI, Uri.encode(mContactEmail)),
                    EMAIL_LOOKUP_PROJECTION, null, null, null);
        } else if (mContactPhone != null && mQueryHandler != null) {
            extras.putString(EXTRA_URI_CONTENT, mContactPhone);
            mQueryHandler.startQuery(TOKEN_PHONE_LOOKUP_AND_TRIGGER, extras,
                    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 CharSequence getAccessibilityClassName() {
        return 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;
            Bundle extras = (cookie != null) ? (Bundle) cookie : new Bundle();
            try {
                switch(token) {
                    case TOKEN_PHONE_LOOKUP_AND_TRIGGER:
                        trigger = true;
                        createUri = Uri.fromParts("tel", extras.getString(EXTRA_URI_CONTENT), 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",
                                extras.getString(EXTRA_URI_CONTENT), 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 && mContactUri != null) {
                // Found contact, so trigger QuickContact
                QuickContact.showQuickContact(getContext(), QuickContactBadge.this, mContactUri,
                        mExcludeMimes, mPrioritizedMimeType);
            } else if (createUri != null) {
                // Prompt user to add this person to contacts
                final Intent intent = new Intent(Intents.SHOW_OR_CREATE_CONTACT, createUri);
                if (extras != null) {
                    extras.remove(EXTRA_URI_CONTENT);
                    intent.putExtras(extras);
                }
                getContext().startActivity(intent);
            }
        }
    }
}