using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using SiegeSong;

namespace SiegeSong
{
    public class InstanceManager : MonoBehaviour
    {
        public GameObject SpeciesDefinitionsContainer;
        public GameObject ActorInstanceContainer;
        public string CurrentPlayerActorInstanceID;
        public List<GameObject> ActorInstances;
        public List<string> ActorInstanceIDs;

        public GameObject DroppableDefinitionContainer;
        public GameObject ArchitectureDefinitionContainer;
        public GameObject StationDefinitionContainer;
        public GameObject WorldObjectInstanceContainer;
        public List<GameObject> WorldObjectInstances;
        public List<string> WorldObjectInstanceIDs;

        public string PlayerAgentKey = "PlayerAgent";
        private int LastGeneratedWorldObjectInstanceIndex;
        private int LastGeneratedActorInstanceIndex;
        private int MaxActorInstanceIDLength = 5;
        private int MaxWorldObjectInstanceIDLength = 6;

        void Start() { }

        void Update() { }

        public KeyValuePair<string, GameObject> InstantiateWorldObject(WorldObject worldObject)
        {
            var worldObjectKey = "";
            GameObject definitionList;
            GameObject instance = null;
            var instanceID = GenerateWorldObjectInstanceID();

            if (!string.IsNullOrEmpty(worldObject.StationKey))
            {
                definitionList = StationDefinitionContainer;
                worldObjectKey = worldObject.StationKey;
            }
            else if (!string.IsNullOrEmpty(worldObject.ArchitectureKey))
            {
                definitionList = ArchitectureDefinitionContainer;
                worldObjectKey = worldObject.ArchitectureKey;
            }
            else
            {
                definitionList = DroppableDefinitionContainer;
                worldObjectKey = worldObject.DroppableKey;
            }
            for (var i = 0; i < definitionList.transform.childCount; i++)
            {
                var worldObjectDefinition = definitionList.transform.GetChild(i);
                if (worldObjectDefinition.gameObject.name == worldObjectKey)
                    instance = GameObject.Instantiate(worldObjectDefinition).gameObject;
            }

            instance.transform.eulerAngles = new Vector3(worldObject.RotationX, worldObject.RotationY, worldObject.RotationZ);
            instance.transform.position = new Vector3(worldObject.PositionX, worldObject.PositionY, worldObject.PositionZ);
            instance.gameObject.name = $"{(string.IsNullOrEmpty(worldObject.FriendlyName) ? worldObjectKey : worldObject.FriendlyName)}_{instanceID}";
            instance.transform.parent = WorldObjectInstanceContainer.transform;
            instance.active = true;

            instance.GetComponentInChildren<Selectable>().InstanceID = instanceID;
            if (!string.IsNullOrEmpty(worldObject.StationKey))
                instance.GetComponentInChildren<Selectable>().StationKey = worldObject.StationKey;
            else if (!string.IsNullOrEmpty(worldObject.ArchitectureKey))
                instance.GetComponentInChildren<Selectable>().ArchitectureKey = worldObject.ArchitectureKey;
            else
                instance.GetComponentInChildren<Selectable>().DroppableKey = worldObject.DroppableKey;


            WorldObjectInstances.Add(instance);
            WorldObjectInstanceIDs.Add(instanceID);

            return new KeyValuePair<string, GameObject>(instanceID, instance);
        }

        public KeyValuePair<string, GameObject> InstantiateActor(Statistics stats)
        {
            GameObject instance = null;

            for (var i = 0; i < SpeciesDefinitionsContainer.transform.childCount; i++)
            {
                var species = SpeciesDefinitionsContainer.transform.GetChild(i);
                if (species.gameObject.name == stats.SpeciesKey)
                    instance = GameObject.Instantiate(species).gameObject;
            }

            if (instance.GetComponent<StatisticsManager>() == null)
                instance.AddComponent<StatisticsManager>();

            var actor = instance.GetComponent<StatisticsManager>();

            if (actor.Stats == null)
                actor.Stats = new Statistics();

            if (!instance.active)
                instance.active = true;

            if (stats.IsPlayer)
            {
                for (var j = 0; j < instance.transform.childCount; j++)
                {
                    if (instance.transform.GetChild(j).name == "PlayerAgent")
                    {
                        instance.transform.GetChild(j).gameObject.active = true;
                    }
                }
            }

            actor.Stats = stats;
            instance.transform.eulerAngles = new Vector3(stats.RotationX, stats.RotationY, stats.RotationZ);
            instance.transform.position = new Vector3(stats.LocationX, stats.LocationY, stats.LocationZ);
            instance.transform.parent = ActorInstanceContainer.transform;

            for (var i = 0; i < stats.InventoryItemIDs.Count; i++)
            {
                actor.Inventory.SelectedItemID = stats.InventoryItemIDs[i];
                actor.Inventory.SelectedAmount = stats.InventoryItemQuantities[i];
                actor.Inventory.AddItem();
                actor.Inventory.SelectedItemID = 0;
                actor.Inventory.SelectedAmount = 0;
                actor.Inventory.SelectedItemIndex = 0;
            }
            foreach (var itemId in stats.ActiveInventoryItemIDs)
            {
                if (actor.Inventory.GetItemByID(itemId).GetComponent<Equipable>() != null)
                    actor.Inventory.EquipmentManager.AddEquipmentToSlots(actor.Inventory.GetItemByID(itemId));
            }
            actor.Inventory.ApparrelManager.CurrentlyActiveIDs = stats.ActiveInventoryItemIDs.ToArray();
            actor.Inventory.ApparrelManager.UpdateApparrel();

            actor.Stats.ActorInstanceID = GenerateActorInstanceID();
            instance.gameObject.name = $"{actor.Stats.FirstName} {actor.Stats.LastName}";
            ActorInstances.Add(instance);
            ActorInstanceIDs.Add(actor.Stats.ActorInstanceID);

            return new KeyValuePair<string, GameObject>(actor.Stats.ActorInstanceID, instance);
        }

        public void ClearAndUnload()
        {
            for (var i = 0; i < ActorInstances.Count; i++)
            {
                ActorInstances[i].active = false;
                GameObject.Destroy(ActorInstances[i]);
            }
            for (var i = 0; i < WorldObjectInstances.Count; i++)
            {
                WorldObjectInstances[i].active = false;
                GameObject.Destroy(ActorInstances[i]);
            }

            LastGeneratedActorInstanceIndex = 0;
            CurrentPlayerActorInstanceID = "";
            ActorInstances = new List<GameObject>();
            ActorInstanceIDs = new List<string>();
        }

        public string GenerateWorldObjectInstanceID()
        {
            LastGeneratedWorldObjectInstanceIndex++;
            var instanceIndex = LastGeneratedWorldObjectInstanceIndex.ToString();
            var newInstanceID = "";
            for (var i = 0; i < MaxWorldObjectInstanceIDLength; i++)
            {
                if (i >= instanceIndex.Length)
                {
                    newInstanceID += "A";
                }
                else
                {
                    newInstanceID += "BCDEFGHIJK"[int.Parse(instanceIndex[i].ToString())];
                }
            }
            return newInstanceID;
        }

        public string GenerateActorInstanceID()
        {
            LastGeneratedActorInstanceIndex++;
            var instanceIndex = LastGeneratedActorInstanceIndex.ToString();
            var newInstanceID = "";
            for (var i = 0; i < MaxActorInstanceIDLength; i++)
            {
                if (i >= instanceIndex.Length)
                {
                    newInstanceID += "A";
                }
                else
                {
                    newInstanceID += "BCDEFGHIJK"[int.Parse(instanceIndex[i].ToString())];
                }
            }
            return newInstanceID;
        }

        public GameObject GetWorldObjectInstanceByID(string instanceID)
        {
            for (var i = 0; i < WorldObjectInstances.Count; i++)
            {
                if (WorldObjectInstanceIDs[i].ToLower() == instanceID.ToLower())
                {
                    return WorldObjectInstances[i];
                }
            }
            return null;
        }

        public GameObject GetActorInstanceByID(string instanceID)
        {
            for (var i = 0; i < ActorInstances.Count; i++)
            {
                if (ActorInstanceIDs[i].ToLower() == instanceID.ToLower())
                {
                    return ActorInstances[i];
                }
            }
            return null;
        }
    }       
}