using UnityEngine.Analytics;

namespace UnityEditor.AdaptivePerformance.Editor.Analytics
{
    internal abstract class AdaptivePerformanceAnalyticsEvent<T> where T : struct
    {
        protected const int k_DefaultMaxEventsPerHour = 1000;
        protected const int k_DefaultMaxElementCount = 1000;

        /// <summary>
        /// The event name for an event determines which database table it goes into in the CDP backend.
        /// All events which we want grouped into a table must share the same event name.
        /// </summary>
        protected readonly string k_EventName;

        protected int m_MaxEventsPerHour;
        protected int m_MaxElementCount;

        /// <summary>
        /// <c>True</c> if the event is registered with Unity analytics API, otherwise <c>False</c>.
        /// </summary>
        bool m_Registered;

        protected AdaptivePerformanceAnalyticsEvent(string eventName,
            int maxEventsPerHour = k_DefaultMaxEventsPerHour, int maxElementCount = k_DefaultMaxElementCount)
        {
            k_EventName = eventName;
            m_MaxEventsPerHour = maxEventsPerHour;
            m_MaxElementCount = maxElementCount;
        }

        public bool Register()
        {
            if (m_Registered)
                return m_Registered;

            var result = RegisterWithAnalyticsServer();

            // AnalyticsResult.TooManyRequests means that we have already registered for this tableName
            if (result != AnalyticsResult.Ok && result != AnalyticsResult.TooManyRequests)
                m_Registered = false;
            else
                m_Registered = true;

            return m_Registered;
        }

        protected abstract AnalyticsResult RegisterWithAnalyticsServer();

        public bool Send(T eventArgs) => m_Registered && SendEvent(eventArgs);

        protected abstract bool SendEvent(T eventArgs);
    }
}