/*
 * Copyright 2020 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.car.calendar.common;

import com.android.car.calendar.common.Dialer.NumberAndAccess;

import java.time.Duration;
import java.time.Instant;
import java.util.Objects;

import javax.annotation.Nullable;

/**
 * An immutable value representing a calendar event. Should contain only details that are relevant
 * to the Car Calendar.
 */
public final class Event {

    /** The status of the current user for this event. */
    public enum Status {
        ACCEPTED,
        DECLINED,
        NONE,
    }

    /** The details required for display of the calendar indicator. */
    public static class CalendarDetails {
        private final String mName;
        private final int mColor;

        CalendarDetails(String name, int color) {
            mName = name;
            mColor = color;
        }

        public int getColor() {
            return mColor;
        }

        public String getName() {
            return mName;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            CalendarDetails that = (CalendarDetails) o;
            return mColor == that.mColor && mName.equals(that.mName);
        }

        @Override
        public int hashCode() {
            return Objects.hash(mName, mColor);
        }
    }

    private final boolean mAllDay;
    private final Instant mStartInstant;
    private final Instant mDayStartInstant;
    private final Instant mEndInstant;
    private final Instant mDayEndInstant;
    private final String mTitle;
    private final Status mStatus;
    @Nullable private final String mLocation;
    @Nullable private final NumberAndAccess mNumberAndAccess;
    private final CalendarDetails mCalendarDetails;

    Event(
            boolean allDay,
            Instant startInstant,
            Instant dayStartInstant,
            Instant endInstant,
            Instant dayEndInstant,
            String title,
            Status status,
            @Nullable String location,
            @Nullable NumberAndAccess numberAndAccess,
            CalendarDetails calendarDetails) {
        mAllDay = allDay;
        mStartInstant = startInstant;
        mDayStartInstant = dayStartInstant;
        mEndInstant = endInstant;
        mDayEndInstant = dayEndInstant;
        mTitle = title;
        mStatus = status;
        mLocation = location;
        mNumberAndAccess = numberAndAccess;
        mCalendarDetails = calendarDetails;
    }

    public Instant getStartInstant() {
        return mStartInstant;
    }

    public Instant getDayStartInstant() {
        return mDayStartInstant;
    }

    public Instant getDayEndInstant() {
        return mDayEndInstant;
    }

    public Instant getEndInstant() {
        return mEndInstant;
    }

    public String getTitle() {
        return mTitle;
    }

    @Nullable
    public NumberAndAccess getNumberAndAccess() {
        return mNumberAndAccess;
    }

    public CalendarDetails getCalendarDetails() {
        return mCalendarDetails;
    }

    @Nullable
    public String getLocation() {
        return mLocation;
    }

    public Status getStatus() {
        return mStatus;
    }

    public boolean isAllDay() {
        return mAllDay;
    }

    public Duration getDuration() {
        return Duration.between(getStartInstant(), getEndInstant());
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Event event = (Event) o;
        return mAllDay == event.mAllDay
                && mStartInstant.equals(event.mStartInstant)
                && mDayStartInstant.equals(event.mDayStartInstant)
                && mEndInstant.equals(event.mEndInstant)
                && mDayEndInstant.equals(event.mDayEndInstant)
                && mTitle.equals(event.mTitle)
                && mStatus == event.mStatus
                && Objects.equals(mLocation, event.mLocation)
                && Objects.equals(mNumberAndAccess, event.mNumberAndAccess)
                && mCalendarDetails.equals(event.mCalendarDetails);
    }

    @Override
    public int hashCode() {
        return Objects.hash(
                mAllDay,
                mStartInstant,
                mDayStartInstant,
                mEndInstant,
                mDayEndInstant,
                mTitle,
                mStatus,
                mLocation,
                mNumberAndAccess,
                mCalendarDetails);
    }
}