package de.pixart.messenger.ui;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import java.util.List;

import de.pixart.messenger.R;
import de.pixart.messenger.persistance.DatabaseBackend;
import de.pixart.messenger.utils.XmppUri;
import de.pixart.messenger.xmpp.jid.Jid;

public class UriHandlerActivity extends AppCompatActivity {

    public static final String ACTION_SCAN_QR_CODE = "scan_qr_code";
    private static final int REQUEST_SCAN_QR_CODE = 0x1234;
    private static final int REQUEST_CAMERA_PERMISSIONS_TO_SCAN = 0x6789;

    private boolean handled = false;

    public static void scan(Activity activity) {
        if (ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
            Intent intent = new Intent(activity, UriHandlerActivity.class);
            intent.setAction(UriHandlerActivity.ACTION_SCAN_QR_CODE);
            intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
            activity.startActivity(intent);
        } else {
            ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSIONS_TO_SCAN);
        }
    }

    public static void onRequestPermissionResult(Activity activity, int requestCode, int[] grantResults) {
        if (requestCode != REQUEST_CAMERA_PERMISSIONS_TO_SCAN) {
            return;
        }
        if (grantResults.length > 0) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                scan(activity);
            } else {
                Toast.makeText(activity, R.string.qr_code_scanner_needs_access_to_camera, Toast.LENGTH_SHORT).show();
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.handled = savedInstanceState != null && savedInstanceState.getBoolean("handled", false);
    }

    @Override
    public void onStart() {
        super.onStart();
        handleIntent(getIntent());
    }

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        savedInstanceState.putBoolean("handled", this.handled);
        super.onSaveInstanceState(savedInstanceState);
    }

    @Override
    public void onNewIntent(Intent intent) {
        handleIntent(intent);
    }

    private void handleUri(Uri uri) {
        final Intent intent;
        final XmppUri xmppUri = new XmppUri(uri);
        final List<Jid> accounts = DatabaseBackend.getInstance(this).getAccountJids(); //TODO only look at enabled accounts

        if (accounts.size() == 0) {
            intent = new Intent(getApplicationContext(), WelcomeActivity.class);
            WelcomeActivity.addInviteUri(intent, xmppUri);
            startActivity(intent);
            return;
        }

        if (xmppUri.isAction(XmppUri.ACTION_MESSAGE)) {
            final Jid jid = xmppUri.getJid();
            final String body = xmppUri.getBody();

            if (jid != null) {
                intent = new Intent(getApplicationContext(), ShareViaAccountActivity.class);
                intent.putExtra(ShareViaAccountActivity.EXTRA_CONTACT, jid.toString());
                intent.putExtra(ShareViaAccountActivity.EXTRA_BODY, body);
            } else {
                intent = new Intent(getApplicationContext(), ShareWithActivity.class);
                intent.setAction(Intent.ACTION_SEND);
                intent.setType("text/plain");
                intent.putExtra(Intent.EXTRA_TEXT, body);
            }
        } else if (accounts.contains(xmppUri.getJid())) {
            intent = new Intent(getApplicationContext(), EditAccountActivity.class);
            intent.setAction(Intent.ACTION_VIEW);
            intent.putExtra("jid", xmppUri.getJid().toBareJid().toString());
            intent.setData(uri);
        } else if (xmppUri.isJidValid()) {
            intent = new Intent(getApplicationContext(), StartConversationActivity.class);
            intent.setAction(Intent.ACTION_VIEW);
            intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
            intent.setData(uri);
        } else {
            Toast.makeText(this, R.string.invalid_jid, Toast.LENGTH_SHORT).show();
            return;
        }

        startActivity(intent);
    }

    private void handleIntent(Intent data) {
        if (handled) {
            return;
        }
        if (data == null || data.getAction() == null) {
            finish();
            return;
        }

        handled = true;

        switch (data.getAction()) {
            case Intent.ACTION_VIEW:
            case Intent.ACTION_SENDTO:
                handleUri(data.getData());
                break;
            case ACTION_SCAN_QR_CODE:
                Intent intent = new Intent(this, ScanActivity.class);
                startActivityForResult(intent, REQUEST_SCAN_QR_CODE);
                return;
        }

        finish();
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, requestCode, intent);
        if (requestCode == REQUEST_SCAN_QR_CODE && resultCode == RESULT_OK) {
            String result = intent.getStringExtra(ScanActivity.INTENT_EXTRA_RESULT);
            if (result != null) {
                Uri uri = Uri.parse(result);
                handleUri(uri);
            }
        }
        finish();
    }
}