using System.Collections;
using System.Collections.Generic;
using UltraCombos;
using UnityEngine;
using UnityEngine.EventSystems;

namespace uc
{
    public class ActivityQueueManager : ActivityManager
    {
        [Header("Queue Manager")]
        public bool initializeOnStart = false;
        public bool isPresentMode;
        public bool circularMode = false;
        public Transform activityQueue;
        List<Activity> activity_list = null;
        int current_index = -1;
        public int CurrentIndex { get { return current_index; } }
        public override Activity current_activity
        {
            get
            {
                if (activity_list != null)
                {
                    if (activity_list.Count > 0)
                    {
                        if (current_index >= 0 && current_index < activity_list.Count)
                            return activity_list[current_index];
                    }
                }
                return null;
            }
        }

        public void Initialize()
        {
            activity_list = new List<Activity>();
            if (activityQueue != null)
            {
                var acts = activityQueue.GetComponentsInChildren<Activity>();
                activity_list.AddRange(acts);
                initialActivity = activity_list[0];
                GenerateActivityQueueFile();
            }
            
            var canvases = Resources.FindObjectsOfTypeAll(typeof(CanvasActivity)) as CanvasActivity[];
            var canvas_activities = new List<CanvasActivity>();
            canvas_activities.AddRange(canvases);
            foreach (var act in activity_list)
            {
                if (act.canvases.Count > 0)
                    continue;
                act.canvases = canvas_activities.FindAll(
                delegate (CanvasActivity ca) {
                    return (ca.gameObject.name == act.gameObject.name);
                });
            }

            Misc.Verbose(module, string.Format("has {0} activities", activity_list.Count));
        }

        private void Start()
        {
            if (initializeOnStart)
                Initialize();
            
            SetActivityByIndex(0);
            Misc.Verbose(module, string.Format("init with activity: {0}", current_activity.name));
        }

        private void Update()
        {

            CheckIdle();

            if (isPresentMode)
            {
                if (Input.GetKeyDown(KeyCode.PageDown))
                {
                    NextActivity();
                }
                else if (Input.GetKeyDown(KeyCode.PageUp))
                {
                    PreviousActivity();
                }
                else if (Input.GetKeyDown(KeyCode.O))
                {
                    PopToInitial();
                }
            }
            
            gameObject.name = "Activity Manager: " + current_activity.name;
        }

        public void NextActivity()
        {
            if (current_index + 1 >= activity_list.Count && circularMode)
            {
                SetActivityByIndex(0);
            }
            else
            {
                SetActivityByIndex(current_index + 1);
            }
        }

        public void PreviousActivity()
        {
            if (current_index - 1 <0 && circularMode)
            {
                SetActivityByIndex(activity_list.Count -1);
            }
            else
                SetActivityByIndex(current_index - 1);
        }

        public void SetActivityByIndex(int index)
        {
            if (activity_list == null || index < 0 || index >= activity_list.Count)
            {
                //Debug.LogWarningFormat("Cannot set page {0} in ActivityManager", index);
                return;
            }

            if (current_index == index)
                return;
            

            if (current_activity != null)
            {
                current_activity.Leave();
            }
            current_index = index;
            current_activity.Enter();
        }

        public override void PopToInitial()
        {
            SetActivityByIndex(0);
        }

        public override void PushActivity(Activity newActivity) { }
        public override void PopToActivity(Activity targetActivity) { }
        public override void PopActivity() { }


        class ActivityListObject { public List<string> list = new List<string>(); }

        void GenerateActivityQueueFile()
        {
            var obj = new ActivityListObject();
            for (int i = 0; i < activity_list.Count; i++)
                obj.list.Add(string.Format("{0:D2} - {1}", i, activity_list[i].name));
            string json = JsonUtility.ToJson(obj, true);
            var root = System.IO.Directory.GetParent(Application.dataPath);
            string path = System.IO.Path.Combine(root.FullName, gameObject.name + " Queue.json");
            System.IO.File.WriteAllText(path, json);
        }
    }
}