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package org.mozc.android.inputmethod.japanese;

import org.mozc.android.inputmethod.japanese.preference.PreferenceUtil;
import org.mozc.android.inputmethod.japanese.resources.R;

import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.content.res.Resources;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.text.style.URLSpan;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.TextView;

/**
 * This activity should be launched only when a user launched the IME as the first time.
 *
 */
public class FirstTimeLaunchActivity extends Activity {
  /**
   * A listener to catch the change of the check box.
   */
  static class SendUsageStatsChangeListener implements OnCheckedChangeListener {
    private final SharedPreferences sharedPreferences;

    SendUsageStatsChangeListener(SharedPreferences sharedPreferences) {
      this.sharedPreferences = sharedPreferences;
    }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
      sharedPreferences.edit()
          .putBoolean(PreferenceUtil.PREF_OTHER_USAGE_STATS_KEY, isChecked)
          .commit();
    }
  }

  /**
   * A listener to catch the change of the SharedPreferences.
   */
  class UpdateViewListener implements OnSharedPreferenceChangeListener {
    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
      updateView(sharedPreferences);
    }
  }

  private SharedPreferences sharedPreferences;

  // We have to keep the instance in order to unregister this.
  OnSharedPreferenceChangeListener updateViewListener = new UpdateViewListener();

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
    initializeContentView(getResources().getBoolean(R.bool.sending_information_features_enabled),
                          sharedPreferences);
  }

  void initializeContentView(boolean sendingInformationFeaturesEnabled,
                             SharedPreferences sharedPreferences) {
    setContentView(R.layout.first_time_launch);

    // Fill strings, which needs replacement.
    Resources resources = getResources();
    TextView thankYouTextView = TextView.class.cast(findViewById(R.id.description_thank_you));
    thankYouTextView.setText(resources.getString(R.string.firsttime_description_thank_you,
                                                 resources.getString(R.string.app_full_name)));
    if (sendingInformationFeaturesEnabled) {
      findViewById(R.id.usage_stats_views).setVisibility(View.VISIBLE);
      TextView usageStatsTextView = TextView.class.cast(findViewById(R.id.description_usage_stats));
      usageStatsTextView.setText(resources.getString(R.string.firsttime_description_usage_stats,
                                                     resources.getString(
                                                         R.string.developer_organization)));

      CheckBox usageStatsCheckBox = CheckBox.class.cast(findViewById(R.id.send_usage_stats));
      usageStatsCheckBox.setOnCheckedChangeListener(
          new SendUsageStatsChangeListener(sharedPreferences));
      if (MozcUtil.isDevChannel(this)) {
        usageStatsCheckBox.setEnabled(false);
        findViewById(R.id.send_usage_stats_devchannel_description).setVisibility(View.VISIBLE);
      }
    } else {
      findViewById(R.id.usage_stats_views).setVisibility(View.GONE);
    }
    findViewById(R.id.close_button).setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        finish();  // Close this activity.
      }
    });
    initializeAnchorTextView(
        R.id.link_terms_of_service,
        R.string.pref_about_terms_of_service_url,
        R.string.pref_about_terms_of_service_title);
    initializeAnchorTextView(
        R.id.link_privacy_policy,
        R.string.pref_about_privacy_policy_url,
        R.string.pref_about_privacy_policy_title);
  }

  private void initializeAnchorTextView(int textViewId, int urlId, int descriptionId) {
    Resources resources = getResources();
    TextView textView = TextView.class.cast(findViewById(textViewId));
    SpannableString spannable = new SpannableString(resources.getString(descriptionId));
    spannable.setSpan(
        new URLSpan(resources.getString(urlId)),
        0, spannable.length(),
        Spanned.SPAN_INCLUSIVE_INCLUSIVE);
    textView.setText(spannable);
    // Make the URLSpan clickable.
    textView.setMovementMethod(LinkMovementMethod.getInstance());
  }

  @Override
  protected void onResume() {
    super.onResume();
    updateView(sharedPreferences);
    sharedPreferences.registerOnSharedPreferenceChangeListener(updateViewListener);
  }

  @Override
  protected void onPause() {
    sharedPreferences.unregisterOnSharedPreferenceChangeListener(updateViewListener);
    super.onPause();
  }

  private void updateView(SharedPreferences sharedPreferences) {
    CheckBox.class.cast(findViewById(R.id.send_usage_stats)).setChecked(
        sharedPreferences.getBoolean(PreferenceUtil.PREF_OTHER_USAGE_STATS_KEY, false));
  }
}