using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using KairoEngine.Core;
using Sirenix.OdinInspector;

namespace KairoEngine.Statistics
{
    [HideMonoScript]
    public class Statistics : SerializedMonoBehaviour
    {
        #region Singleton
        private static Statistics statistics;
        public static Statistics instance
        {
            get {
                if(!statistics)
                {
                    statistics = FindObjectOfType (typeof(Statistics)) as Statistics;
                    if(!statistics)
                    {
                        Debug.LogError("There need to one active Statistics script on the scene.");
                        return null;
                    }
                }
                return statistics;
            }
        }
        #endregion

        public bool listenForStatisticsEvents = true;
        public string setStatisticEvent = "SetStatisticData";
        [InlineEditor(InlineEditorObjectFieldModes.Boxed)] public StatisticsLibrary db;

        void Awake()
        {
            if(instance != null && instance != this) 
            {
                Destroy(this.gameObject);
                return;
            }
        }

        void Start()
        {
            if(db == null)
            {
                Debug.LogError("Statistics component is missing the StatisticsList.\nPlease configure the statistics module in the Game config file.");
                return;
            }
            LoadStatistics();
            if(!listenForStatisticsEvents) return;
            GenericEvents.StartListening(setStatisticEvent, SetStatisticInt);
            GenericEvents.StartListeningForStringFloat(setStatisticEvent, SetStatisticFloat);
            GenericEvents.StartListening(setStatisticEvent, SetStatisticString);
        }

        void OnDestroy()
        {
            SaveStatistics();
            if(!listenForStatisticsEvents) return;
            GenericEvents.StopListening(setStatisticEvent, SetStatisticInt);
            GenericEvents.StopListeningForStringFloat(setStatisticEvent, SetStatisticFloat);
            GenericEvents.StopListening(setStatisticEvent, SetStatisticString);
        }

        public static StatisticData GetData(string title)
        {
            if(instance == null) return null;
            if(instance.db == null) return null;
            for (int i = 0; i < instance.db.data.Count; i++)
            {
                if(instance.db.data[i].title == title) return instance.db.data[i];
            }
            return null;
        }

        private void LoadStatistics()
        {
            if(instance == null) return;
            if(instance.db == null) return;
            for (int i = 0; i < instance.db.data.Count; i++)
            {
                StatisticData stat = instance.db.data[i];
                if(stat.persistent == false) continue;
                switch (stat.category)
                {
                    case StatisticType.time:
                        float time = PlayerPrefs.GetFloat(stat.title, 0f);
                        stat.SetTime(time);
                        break;
                    case StatisticType.integer:
                        int integer = PlayerPrefs.GetInt(stat.title, 0);
                        stat.SetInteger(integer);
                        break;
                    case StatisticType.text:
                        string text = PlayerPrefs.GetString(stat.title, "");
                        stat.SetText(text);
                        break;
                    default:
                        break;
                }
            }
        }

        private void SaveStatistics()
        {
            if(instance == null) return;
            if(instance.db == null) return;
            for (int i = 0; i < instance.db.data.Count; i++)
            {
                StatisticData stat = instance.db.data[i];
                if(stat.persistent == false) continue;
                switch (stat.category)
                {
                    case StatisticType.time:
                        PlayerPrefs.SetFloat(stat.title, stat.GetTime());
                        break;
                    case StatisticType.integer:
                        PlayerPrefs.SetInt(stat.title, stat.GetInteger());
                        break;
                    case StatisticType.text:
                        PlayerPrefs.SetString(stat.title, stat.GetText());
                        break;
                    default:
                        break;
                }
            }
        }

        public void SetStatisticInt(string statName, int newValue)
        {
            StatisticData statisticData = GetData(statName);
            if(statisticData == null) return;
            if(statisticData.category != StatisticType.integer) return;
            statisticData.SetInteger(newValue);
        }

        public void SetStatisticFloat(string statName, float newValue)
        {
            StatisticData statisticData = GetData(statName);
            if(statisticData == null) return;
            if(statisticData.category != StatisticType.time) return;
            statisticData.SetTime(newValue);
        }

        public void SetStatisticString(string statName, string newValue)
        {
            StatisticData statisticData = GetData(statName);
            if(statisticData == null) return;
            if(statisticData.category != StatisticType.text) return;
            statisticData.SetText(newValue);
        }
    }
}