using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

namespace Crosstales.RTVoice.UI
{
   /// <summary>Speaks an InputField.</summary>
   [HelpURL("https://crosstales.com/media/data/assets/rtvoice/api/class_crosstales_1_1_r_t_voice_1_1_u_i_1_1_speak_u_i_input_field.html")]
   public class SpeakUIInputField : SpeakUIBase
   {
      #region Variables

      public bool ChangeColor = true;
      public Color TextColor = Color.green;
      public bool ClearTags = true;

      public InputField InputComponent;

      private Color originalColor;
      private Color originalPHColor;

      private string lastText;

      #endregion


      #region MonoBehaviour methods

      private void Awake()
      {
         InputComponent = GetComponent<InputField>();
         originalColor = InputComponent.textComponent.color;
         originalPHColor = InputComponent.placeholder.color;
      }

      protected override void Start()
      {
         base.Start();
         lastText = InputComponent.textComponent.text;
      }

      private void Update()
      {
         if (SpeakIfChanged && !isSpeaking && lastText != InputComponent.textComponent.text)
         {
            string text = InputComponent.textComponent.text;
            isSpeaking = true;
            lastText = text;
            uid = speak(ClearTags ? text.CTClearTags() : text);
            elapsedTime = 0f;
         }
         else
         {
            if (isInside)
            {
               elapsedTime += Time.deltaTime;

               if (elapsedTime > Delay && !isSpeaking && (!SpeakOnlyOnce || !spoken))
               {
                  string text = getText();
                  uid = speak(ClearTags ? text.CTClearTags() : text);
                  elapsedTime = 0f;
               }
            }
            else
            {
               elapsedTime = 0f;
            }
         }
      }

      #endregion


      #region Private methods

      private string getText()
      {
         string text = InputComponent.textComponent.text;
         if (!string.IsNullOrEmpty(text) && text.Length > 1)
         {
            if (ChangeColor)
               InputComponent.textComponent.color = TextColor;
         }
         else
         {
            if (ChangeColor)
               InputComponent.placeholder.color = TextColor;

            text = InputComponent.placeholder.GetComponent<Text>().text;
         }

         return text;
      }

      #endregion


      #region Overridden methods

      public override void OnPointerExit(PointerEventData eventData)
      {
         base.OnPointerExit(eventData);

         InputComponent.textComponent.color = originalColor;
         InputComponent.placeholder.color = originalPHColor;
      }

      protected override void onSpeakComplete(Crosstales.RTVoice.Model.Wrapper wrapper)
      {
         if (wrapper.Uid == uid)
         {
            base.onSpeakComplete(wrapper);

            InputComponent.textComponent.color = originalColor;
            InputComponent.placeholder.color = originalPHColor;
         }
      }

      #endregion
   }
}
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