using System;
using System.Collections;
using System.Collections.Generic;
using Interaction;
using TMPro;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.Serialization;
using UnityEngine.UI;

public class UiController : MonoBehaviour
{
    [FormerlySerializedAs("_pickupper")]
    [Header("Objects")]
    [SerializeField]
    private InteractionHandler interactionHandler;
    
    [Header("UI Elements")]
    [SerializeField]
    private GameObject _actionDisplay;
    [SerializeField]
    private TextMeshProUGUI _actionText;
    [SerializeField]
    private Button _prevActionButton;
    [SerializeField]
    private Button _nextActionButton;
    
    [SerializeField]
    private Image _progressBarImage;

    [SerializeField]
    private Image _progressBarBorder;

    [SerializeField] private TextMeshProUGUI _progressText;
    
    [SerializeField] private TextMeshProUGUI _deadlineText;
    [SerializeField] private TextMeshProUGUI _currentDateText;
    [SerializeField] private TextMeshProUGUI _predictedEndText;

    [SerializeField] private Gradient _deadlineTextColors;

    public GameObject WinScreen;
    public GameObject LoseScreen;
    public GameObject StartScreen;
    
    void Update()
    {
        StartScreen.SetActive(!GameManager.Instance.IsStarted);
        
        UpdateActionDisplay();
        UpdateProgressBar();
        UpdateDeadlineDateStuffTexts();
        
        WinScreen.SetActive(GameManager.Instance.Won);
        LoseScreen.SetActive(GameManager.Instance.Lost);
    }

    private void UpdateProgressBar()
    {
        Vector3 scale = _progressBarImage.rectTransform.localScale;
        scale.x = (float)GameManager.Instance.GameProgress;
        
        _progressBarImage.rectTransform.localScale = scale;
        _progressBarImage.pixelsPerUnitMultiplier = _progressBarBorder.pixelsPerUnitMultiplier * scale.x;
        _progressText.text = $"Entwicklungsfortschritt: {GameManager.Instance.GameProgress:##0%}";
    }

    private void UpdateDeadlineDateStuffTexts()
    {
        _currentDateText.text = $"Aktuelle Zeit: {TimeManager.Instance.CurrentDate: dddd dd.MM.yy hh U\\hr}";
        _deadlineText.text = $"Deadline: {TimeManager.Instance.Deadline: dddd dd.MM.yy hh U\\hr}";
        _predictedEndText.text = $"Vorraussichtlich fertig: {(TimeManager.Instance.PredictedEndDate == DateTime.MaxValue ? "Nie" : TimeManager.Instance.PredictedEndDate.ToString("dddd dd.MM.yy hh U\\hr"))}";
        _predictedEndText.color = _deadlineTextColors.Evaluate(TimeManager.Instance.PredictedMissesDeadline ? 0.0f : 1.0f);
    }

    private void UpdateActionDisplay()
    {
        bool show = interactionHandler.InteractionsInRange.Count > 0;
        
        _actionDisplay.SetActive(show);

        if (!show)
            return;

        switch (interactionHandler.SelectedAction)
        {
            case PickupInteractible pickup:
                _actionText.text = $"Hebe {pickup.Name} auf";
                break;
            case UseInteractible usable:
                _actionText.text = usable.UseText;
                break;
            case GiveItemInteractible giveItem:
                _actionText.text = $"Gebe {GameManager.Instance.Player.CarriedItem?.Name ?? "keinen Gegenstand"} an {giveItem.Developer.Name}";
                break;
            default:
                _actionText.text = $"Unbekannte Aktion";
                break;
            // case InteractibleType.Use:
            //     _actionText.text = $"{_pickupper.Selected.Name} benutzen";
            //     break;
            // case InteractibleType.Give:
            //     _actionText.text = $"An {_pickupper.Selected.Name} geben";
            //     break;
        }

        //_prevActionButton.interactable = _pickupper.CanSelectPrevious;
        //_nextActionButton.interactable = _pickupper.CanSelectNext;
    }

    public void Replay()
    {
        string currentSceneName = SceneManager.GetActiveScene().name;
        SceneManager.LoadScene(currentSceneName);
    }

    public void Exit()
    {
        //UnityEditor.EditorApplication.isPlaying = false;
        Application.Quit();
    }
}