using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using Sirenix.OdinInspector;

namespace KairoEngine.Core
{
    // Todo: Refactor class to be a Singleton
    // Todo: Create a public function to trigger the change scene action
    // Todo: The OnChangeScene event should be fired from this script after the scene change starts
    // Todo: Change functionality in TriggerChangeScene to use this singleton instead of the OnChangeScene event
    // Todo: The game location should be query to the GlobalMap

    /// <summary>Handles changing scenes in the game.</summary>
    public class SceneManager : MonoBehaviour
    {
        /// <summary>Name of the current location from the Global Map.</summary>
        [ReadOnly] public string currentLocation = "";
        private SceneChangeData nextSceneData;
        private float time;
 
        void OnEnable()
        {
            TransitionEvents.OnChangeScene += OnChangeScene;
            UnityEngine.SceneManagement.SceneManager.sceneLoaded += OnSceneLoaded;
            TransitionEvents.OnLocationName += SetCurrentLocation;
        }

        void OnDisable()
        {
            TransitionEvents.OnChangeScene -= OnChangeScene;
            UnityEngine.SceneManagement.SceneManager.sceneLoaded -= OnSceneLoaded;
            TransitionEvents.OnLocationName -= SetCurrentLocation;
        }

        private void OnChangeScene(SceneChangeData sceneChangeData, float time)
        {
            nextSceneData = sceneChangeData;
            this.time = time;
            TransitionEvents.FadeIn(time);
            TransitionEvents.OnTransitionFinish += ChangeScene;
        }

        private void ChangeScene()
        {
            TransitionEvents.OnTransitionFinish -= ChangeScene;
            SerializationEvents.SerializeData();
            TransitionEvents.GetLocationName();
            Debug.Log("Loading scene " + nextSceneData.sceneName);
            UnityEngine.SceneManagement.SceneManager.LoadScene(nextSceneData.sceneName, LoadSceneMode.Single);
        }

        private void OnSceneLoaded(Scene scene, LoadSceneMode mode)
        {
            Debug.Log("Finished loading scene " + scene.name);
            TransitionEvents.FadeOut(time);
            string link = "";
            if(nextSceneData != null) link = nextSceneData.sceneLink;
            TransitionEvents.SceneStart(link);
        }

        private void SetCurrentLocation(string locationName)
        {
            currentLocation = locationName;
        }
    }
}