/*
 * Copyright (C) 2014 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 com.android.settings.notification;

import android.app.NotificationManager;
import android.app.NotificationManager.Policy;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.VisibleForTesting;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceScreen;

import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
import com.android.settings.R;

public class ZenModeSettings extends ZenModeSettingsBase {
    private static final String KEY_PRIORITY_SETTINGS = "priority_settings";
    private static final String KEY_VISUAL_SETTINGS = "visual_interruptions_settings";

    private Preference mPrioritySettings;
    private Preference mVisualSettings;
    private Policy mPolicy;
    private SummaryBuilder mSummaryBuilder;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.zen_mode_settings);
        final PreferenceScreen root = getPreferenceScreen();

        mPrioritySettings = root.findPreference(KEY_PRIORITY_SETTINGS);
        mVisualSettings = root.findPreference(KEY_VISUAL_SETTINGS);
        mPolicy = NotificationManager.from(mContext).getNotificationPolicy();
        mSummaryBuilder = new SummaryBuilder(getContext());
    }

    @Override
    public void onResume() {
        super.onResume();
        if (isUiRestricted()) {
            return;
        }
    }

    @Override
    public int getMetricsCategory() {
        return MetricsEvent.NOTIFICATION_ZEN_MODE;
    }

    @Override
    protected void onZenModeChanged() {
        updateControls();
    }

    @Override
    protected void onZenModeConfigChanged() {
        mPolicy = NotificationManager.from(mContext).getNotificationPolicy();
        updateControls();
    }

    private void updateControls() {
        updatePrioritySettingsSummary();
        updateVisualSettingsSummary();
    }

    private void updatePrioritySettingsSummary() {
        mPrioritySettings.setSummary(mSummaryBuilder.getPrioritySettingSummary(mPolicy));
    }

    private void updateVisualSettingsSummary() {
        mVisualSettings.setSummary(mSummaryBuilder.getVisualSettingSummary(mPolicy));
    }

    @Override
    protected int getHelpResource() {
        return R.string.help_uri_interruptions;
    }

    public static class SummaryBuilder {

        private Context mContext;

        public SummaryBuilder(Context context) {
            mContext = context;
        }

        String getPrioritySettingSummary(Policy policy) {
            String s = mContext.getString(R.string.zen_mode_alarms);
            s = append(s, isCategoryEnabled(policy, Policy.PRIORITY_CATEGORY_REMINDERS),
                R.string.zen_mode_reminders);
            s = append(s, isCategoryEnabled(policy, Policy.PRIORITY_CATEGORY_EVENTS),
                R.string.zen_mode_events);
            if (isCategoryEnabled(policy, Policy.PRIORITY_CATEGORY_MESSAGES)) {
                if (policy.priorityMessageSenders == Policy.PRIORITY_SENDERS_ANY) {
                    s = append(s, true, R.string.zen_mode_all_messages);
                } else {
                    s = append(s, true, R.string.zen_mode_selected_messages);
                }
            }
            if (isCategoryEnabled(policy, Policy.PRIORITY_CATEGORY_CALLS)) {
                if (policy.priorityCallSenders == Policy.PRIORITY_SENDERS_ANY) {
                    s = append(s, true, R.string.zen_mode_all_callers);
                } else {
                    s = append(s, true, R.string.zen_mode_selected_callers);
                }
            } else if (isCategoryEnabled(policy, Policy.PRIORITY_CATEGORY_REPEAT_CALLERS)) {
                s = append(s, true, R.string.zen_mode_repeat_callers);
            }
            return s;
        }

        String getVisualSettingSummary(Policy policy) {
            String s = mContext.getString(R.string.zen_mode_all_visual_interruptions);
            if (isEffectSuppressed(policy, Policy.SUPPRESSED_EFFECT_SCREEN_ON)
                && isEffectSuppressed(policy, Policy.SUPPRESSED_EFFECT_SCREEN_OFF)) {
                s = mContext.getString(R.string.zen_mode_no_visual_interruptions);
            } else if (isEffectSuppressed(policy, Policy.SUPPRESSED_EFFECT_SCREEN_ON)) {
                s = mContext.getString(R.string.zen_mode_screen_on_visual_interruptions);
            } else if (isEffectSuppressed(policy, Policy.SUPPRESSED_EFFECT_SCREEN_OFF)) {
                s = mContext.getString(R.string.zen_mode_screen_off_visual_interruptions);
            }
            return s;
        }

        @VisibleForTesting
        String append(String s, boolean condition, int resId) {
            if (condition) {
                return mContext.getString(
                    R.string.join_many_items_middle, s, mContext.getString(resId));
            }
            return s;
        }

        private boolean isCategoryEnabled(Policy policy, int categoryType) {
            return (policy.priorityCategories & categoryType) != 0;
        }

        private boolean isEffectSuppressed(Policy policy, int effect) {
            return (policy.suppressedVisualEffects & effect) != 0;
        }

    }
}