using System;
using Microsoft.MixedReality.Toolkit.UI;
using Microsoft.MixedReality.Toolkit.Utilities;
using TMPro;
using UnityEngine;

namespace WebViewStream
{
    public class ServicesListPopulator : MonoBehaviour
    {
        [SerializeField]
        private ScrollingObjectCollection scrollView;

        [SerializeField]
        private GameObject dynamicItem;

        [SerializeField]
        private GridObjectCollection gridObjectCollection;

        private bool isVisible = true;

        private const string apiUrlPrefix = "API URL: ";
        private const string hostPrefix = "Host: ";

        /// <summary>
        /// Adds an item to the table from a service.
        /// </summary>
        /// <param name="service"></param>
        /// <param name="action"></param>
        public void AddItemFromService(MdnsService service, Action action)
        {
            GameObject itemInstance = Instantiate(dynamicItem, gridObjectCollection.transform);
            itemInstance.SetActive(true);

            Debug.Log($"Adding service to table: {service}");
            TextMeshPro[] textMeshes = itemInstance.GetComponentsInChildren<TextMeshPro>();
            if (textMeshes.Length < 2)
            {
                Debug.LogError("Not enough text meshes found in dynamic item");
                return;
            }
            textMeshes[0].text = $"{apiUrlPrefix}http://{service.IpAddress}:{service.Port}{service.Path}";
            textMeshes[1].text = $"{hostPrefix}{service.Host}";
            itemInstance
                .GetComponentInChildren<Interactable>()
                .OnClick.AddListener(() =>
                {
                    Debug.Log($"Clicked on service: {service.Host}");
                    action.Invoke();
                    ToggleVisibility();
                });

            gridObjectCollection.UpdateCollection();
            scrollView.UpdateContent();
        }

        /// <summary>
        /// Removes all items from the table.
        /// </summary>
        public void RemoveAllItems()
        {
            foreach (Transform child in gridObjectCollection.transform)
            {
                Destroy(child.gameObject);
            }

            Debug.Log("Removed all services from table");
            gridObjectCollection.UpdateCollection();
            scrollView.UpdateContent();
        }

        /// <summary>
        /// Removes an item from the table by service.
        /// </summary>
        /// <param name="service"></param>
        public void RemoveItemByService(MdnsService service)
        {
            string apiUrl = $"{apiUrlPrefix}http://{service.IpAddress}:{service.Port}{service.Path}";
            string hostname = $"{hostPrefix}{service.Host}";

            foreach (Transform child in gridObjectCollection.transform)
            {
                TextMeshPro[] textMeshes = child.GetComponentsInChildren<TextMeshPro>();
                if (textMeshes.Length >= 2 && textMeshes[0].text == apiUrl && textMeshes[1].text == hostname)
                {
                    Debug.Log($"Removing service from table: {service}");
                    Destroy(child.gameObject);
                    break;
                }
            }

            gridObjectCollection.UpdateCollection();
            scrollView.UpdateContent();
        }

        /// <summary>
        /// Toggles the visibility of the table.
        /// </summary>
        public void ToggleVisibility()
        {
            isVisible = !isVisible;

            gameObject.SetActive(isVisible);
        }
    }
}