/*
 * Copyright (C) 2008 ZXing authors
 *
 * 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 com.google.zxing.client.android.share;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.provider.ContactsContract;
import android.view.KeyEvent;
import android.view.View;
import android.widget.TextView;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.client.android.Contents;
import com.google.zxing.client.android.Intents;
import com.google.zxing.client.android.R;
import com.google.zxing.client.android.clipboard.ClipboardInterface;

/**
 * Barcode Scanner can share data like contacts and bookmarks by displaying a QR Code on screen,
 * such that another user can scan the barcode with their phone.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class ShareActivity extends Activity {

    private static final String TAG = ShareActivity.class.getSimpleName();

    private static final int PICK_BOOKMARK = 0;
    private static final int PICK_CONTACT = 1;
    private static final int PICK_APP = 2;
    private final View.OnClickListener contactListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
            startActivityForResult(intent, PICK_CONTACT);
        }
    };
    private final View.OnClickListener bookmarkListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(Intent.ACTION_PICK);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
            intent.setClassName(ShareActivity.this, BookmarkPickerActivity.class.getName());
            startActivityForResult(intent, PICK_BOOKMARK);
        }
    };
    private final View.OnClickListener appListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(Intent.ACTION_PICK);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
            intent.setClassName(ShareActivity.this, AppPickerActivity.class.getName());
            startActivityForResult(intent, PICK_APP);
        }
    };
    private final View.OnClickListener clipboardListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Should always be true, because we grey out the clipboard button in onResume() if it's empty
            CharSequence text = ClipboardInterface.getText(ShareActivity.this);
            if (text != null) {
                launchSearch(text.toString());
            }
        }
    };
    private final View.OnKeyListener textListener = new View.OnKeyListener() {
        @Override
        public boolean onKey(View view, int keyCode, KeyEvent event) {
            if (keyCode == KeyEvent.KEYCODE_ENTER && event.getAction() == KeyEvent.ACTION_DOWN) {
                String text = ((TextView) view).getText().toString();
                if (text != null && !text.isEmpty()) {
                    launchSearch(text);
                }
                return true;
            }
            return false;
        }
    };
    private View clipboardButton;

    private static String massageContactData(String data) {
        // For now -- make sure we don't put newlines in shared contact data. It messes up
        // any known encoding of contact data. Replace with space.
        if (data.indexOf('\n') >= 0) {
            data = data.replace("\n", " ");
        }
        if (data.indexOf('\r') >= 0) {
            data = data.replace("\r", " ");
        }
        return data;
    }

    private void launchSearch(String text) {
        Intent intent = new Intent(Intents.Encode.ACTION);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        intent.putExtra(Intents.Encode.TYPE, Contents.Type.TEXT);
        intent.putExtra(Intents.Encode.DATA, text);
        intent.putExtra(Intents.Encode.FORMAT, BarcodeFormat.QR_CODE.toString());
        startActivity(intent);
    }

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.share);

        findViewById(R.id.share_contact_button).setOnClickListener(contactListener);
        findViewById(R.id.share_bookmark_button).setOnClickListener(bookmarkListener);
        findViewById(R.id.share_app_button).setOnClickListener(appListener);
        clipboardButton = findViewById(R.id.share_clipboard_button);
        clipboardButton.setOnClickListener(clipboardListener);
        findViewById(R.id.share_text_view).setOnKeyListener(textListener);
    }

    @Override
    protected void onResume() {
        super.onResume();
        clipboardButton.setEnabled(ClipboardInterface.hasText(this));
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
                case PICK_BOOKMARK:
                case PICK_APP:
                    showTextAsBarcode(intent.getStringExtra("url"));
                    break;
                case PICK_CONTACT:
                    // Data field is content://contacts/people/984
                    showContactAsBarcode(intent.getData());
                    break;
            }
        }
    }

    private void showTextAsBarcode(String text) {
        if (text == null) {
            return; // Show error?
        }
        Intent intent = new Intent(Intents.Encode.ACTION);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        intent.putExtra(Intents.Encode.TYPE, Contents.Type.TEXT);
        intent.putExtra(Intents.Encode.DATA, text);
        intent.putExtra(Intents.Encode.FORMAT, BarcodeFormat.QR_CODE.toString());
        startActivity(intent);
    }

    /**
     * Takes a contact Uri and does the necessary database lookups to retrieve that person's info,
     * then sends an Encode intent to render it as a QR Code.
     *
     * @param contactUri A Uri of the form content://contacts/people/17
     */
    private void showContactAsBarcode(Uri contactUri) {
        if (contactUri == null) {
            return; // Show error?
        }
        ContentResolver resolver = getContentResolver();

        Cursor cursor;
        try {
            // We're seeing about six reports a week of this exception although I don't understand why.
            cursor = resolver.query(contactUri, null, null, null, null);
        } catch (IllegalArgumentException ignored) {
            return;
        }
        if (cursor == null) {
            return;
        }

        String id;
        String name;
        boolean hasPhone;
        try {
            if (!cursor.moveToFirst()) {
                return;
            }

            id = cursor.getString(cursor.getColumnIndex(BaseColumns._ID));
            name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
            hasPhone = cursor.getInt(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER)) > 0;


        } finally {
            cursor.close();
        }

        // Don't require a name to be present, this contact might be just a phone number.
        Bundle bundle = new Bundle();
        if (name != null && !name.isEmpty()) {
            bundle.putString(ContactsContract.Intents.Insert.NAME, massageContactData(name));
        }

        if (hasPhone) {
            Cursor phonesCursor = resolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                    null,
                    ContactsContract.CommonDataKinds.Phone.CONTACT_ID + '=' + id,
                    null,
                    null);
            if (phonesCursor != null) {
                try {
                    int foundPhone = 0;
                    int phonesNumberColumn = phonesCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
                    int phoneTypeColumn = phonesCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);
                    while (phonesCursor.moveToNext() && foundPhone < Contents.PHONE_KEYS.length) {
                        String number = phonesCursor.getString(phonesNumberColumn);
                        if (number != null && !number.isEmpty()) {
                            bundle.putString(Contents.PHONE_KEYS[foundPhone], massageContactData(number));
                        }
                        int type = phonesCursor.getInt(phoneTypeColumn);
                        bundle.putInt(Contents.PHONE_TYPE_KEYS[foundPhone], type);
                        foundPhone++;
                    }
                } finally {
                    phonesCursor.close();
                }
            }
        }

        Cursor methodsCursor = resolver.query(ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_URI,
                null,
                ContactsContract.CommonDataKinds.StructuredPostal.CONTACT_ID + '=' + id,
                null,
                null);
        if (methodsCursor != null) {
            try {
                if (methodsCursor.moveToNext()) {
                    String data = methodsCursor.getString(
                            methodsCursor.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.FORMATTED_ADDRESS));
                    if (data != null && !data.isEmpty()) {
                        bundle.putString(ContactsContract.Intents.Insert.POSTAL, massageContactData(data));
                    }
                }
            } finally {
                methodsCursor.close();
            }
        }

        Cursor emailCursor = resolver.query(ContactsContract.CommonDataKinds.Email.CONTENT_URI,
                null,
                ContactsContract.CommonDataKinds.Email.CONTACT_ID + '=' + id,
                null,
                null);
        if (emailCursor != null) {
            try {
                int foundEmail = 0;
                int emailColumn = emailCursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA);
                while (emailCursor.moveToNext() && foundEmail < Contents.EMAIL_KEYS.length) {
                    String email = emailCursor.getString(emailColumn);
                    if (email != null && !email.isEmpty()) {
                        bundle.putString(Contents.EMAIL_KEYS[foundEmail], massageContactData(email));
                    }
                    foundEmail++;
                }
            } finally {
                emailCursor.close();
            }
        }

        Intent intent = new Intent(Intents.Encode.ACTION);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        intent.putExtra(Intents.Encode.TYPE, Contents.Type.CONTACT);
        intent.putExtra(Intents.Encode.DATA, bundle);
        intent.putExtra(Intents.Encode.FORMAT, BarcodeFormat.QR_CODE.toString());

        startActivity(intent);
    }
}
