using System.Collections.Generic;
using System;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.EventSystems;
using NeonTea.Quakeball.Player;
using TMPro;

namespace NeonTea.Quakeball.Interface {
    public class Terminal : MonoBehaviour {

        public RectTransform TerminalPanel;
        public TMP_InputField InputField;
        public TMP_Text TextField;
        public LocalPlayer Player;

        private InputAction ToggleTerminalAction;
        private InputAction SubmitTerminal;
        private float DesiredTerminalPos;
        private bool IsOpen = false;

        private List<string> Messages = new List<string>();
        private string Text = "";

        public static string INFO_COLOR = "#FE8";

        void Start() {
            ToggleTerminalAction = new InputAction("Toggle Terminal", binding: "<Keyboard>/backquote");
            ToggleTerminalAction.Enable();
            ToggleTerminalAction.performed += ToggleTerminal;
            SubmitTerminal = new InputAction("Terminal Submit", binding: "<Keyboard>/enter");
            SubmitTerminal.Enable();
            SubmitTerminal.performed += Submit;

            DesiredTerminalPos = (TerminalPanel.rect.height / 2) * (IsOpen ? -1 : 1);

            InputField.restoreOriginalTextOnEscape = false;

            AddMessage($"<color={INFO_COLOR}>Welcome to Quakeball!</color>");
        }

        public void ToggleTerminal(InputAction.CallbackContext context) {
            IsOpen = !IsOpen;
            DesiredTerminalPos = (TerminalPanel.rect.height / 2) * (IsOpen ? -1 : 1);
            if (IsOpen) {
                InputField.text = "";
            }
            InputField.readOnly = true;
            if (Player != null) {
                Player.DisableInput = IsOpen;
            }
        }

        void Update() {
            Vector3 pos = TerminalPanel.anchoredPosition;
            pos.y = Mathf.Lerp(pos.y, DesiredTerminalPos, Time.deltaTime * 10);
            TerminalPanel.anchoredPosition = pos;
            if (IsOpened() && EventSystem.current.currentSelectedGameObject != InputField) {
                InputField.Select();
                InputField.ActivateInputField();
                InputField.readOnly = false;
            }
        }

        public void AddMessage(string message) {
            Messages.Add(message);
            Text = String.Join("\n", Messages.ToArray());
            TextField.text = Text;
        }

        private void Submit(InputAction.CallbackContext context) {
            if (IsOpened()) {
                AddMessage(InputField.text);
                InputField.text = "";
            }
        }

        private bool IsOpened() {
            return IsOpen && (TerminalPanel.anchoredPosition.y + TerminalPanel.rect.height / 2) < 10;
        }
    }
}