/*
 * ConnectBot: simple, powerful, open-source SSH client for Android
 * Copyright 2007 Kenny Root, Jeffrey Sharkey
 *
 * 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.five_ten_sg.connectbot;

import com.five_ten_sg.connectbot.util.HelpTopicView;
import android.app.Activity;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.ViewFlipper;

/**
 * Show a series of wizard-like steps to the user, which might include an EULA,
 * program credits, and helpful hints.
 *
 * @author jsharkey
 */
public class WizardActivity extends Activity {
    protected ViewFlipper flipper = null;
    private Button next, prev;
    private static final String TAG = "ConnectBot.WizardActivity";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.act_wizard);
        this.flipper = (ViewFlipper) findViewById(R.id.wizard_flipper);
        // inflate the layout for EULA step
        LayoutInflater inflater = LayoutInflater.from(this);
        View helpView = inflater.inflate(R.layout.wiz_eula, this.flipper, false);
        TextView appVersionView = (TextView) helpView.findViewById(R.id.app_version);

        // get package version
        try {
            appVersionView.setText(getPackageManager().getPackageInfo(getPackageName(), 0).versionName);
        }
        catch (NameNotFoundException e) {
            Log.e(TAG, "Problem retrieving application version", e);
        }

        this.flipper.addView(helpView);
        // Add a view for each help topic we want the user to see.
        String[] topics = getResources().getStringArray(R.array.list_wizard_topics);

        for (String topic : topics) {
            flipper.addView(new HelpTopicView(this).setTopic(topic));
        }

        next = (Button)this.findViewById(R.id.action_next);
        next.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                if (isLastDisplayed()) {
                    // user walked past end of wizard, so return okay
                    WizardActivity.this.setResult(Activity.RESULT_OK);
                    WizardActivity.this.finish();
                }
                else {
                    // show next step and update buttons
                    flipper.showNext();
                    updateButtons();
                }
            }
        });
        prev = (Button)this.findViewById(R.id.action_prev);
        prev.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                if (isFirstDisplayed()) {
                    // user walked past beginning of wizard, so return that they cancelled
                    WizardActivity.this.setResult(Activity.RESULT_CANCELED);
                    WizardActivity.this.finish();
                }
                else {
                    // show previous step and update buttons
                    flipper.showPrevious();
                    updateButtons();
                }
            }
        });
        this.updateButtons();
    }

    protected boolean isFirstDisplayed() {
        return (flipper.getDisplayedChild() == 0);
    }

    protected boolean isLastDisplayed() {
        return (flipper.getDisplayedChild() == flipper.getChildCount() - 1);
    }

    protected void updateButtons() {
        boolean eula = (flipper.getDisplayedChild() == 0);
        next.setText(eula ? getString(R.string.wizard_agree) : getString(R.string.wizard_next));
        prev.setText(eula ? getString(R.string.delete_neg) : getString(R.string.wizard_back));
    }
}