using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;

public interface IProgramView
{
    void ShowMessage(string message);
    void DisplayProgram(string programId);
    void ShowProgramList(List<string> programIds);
    void HideProgramList();
    void HideProgramSelectPanel();

    public event Action<string> OnCreateProgramClicked;
    public event Action OnLoadProgramListRequested; // '불러오기' 버튼 클릭
    public event Action<string> OnProgramSelectedToLoad;
    public event Action OnOpenProgramClicked;
    public event Action OnSaveClicked;
    public event Action OnAddPointClicked;
}

public class ProgramView : MonoBehaviour, IProgramView
{
    // --- UI 요소 참조 ---
    [SerializeField] private Button loadIconButton;
    [SerializeField] private Button loadProgramButton;
    //[SerializeField] private Button saveProgramButton;
    //[SerializeField] private Button addPointButton; // UI상 위치를 찍는 버튼
    //[SerializeField] private TextMeshProUGUI currentProgramIdText;
    //[SerializeField] private TextMeshProUGUI endpointListText;

    // --- 프로그램 목록 패널 ---
    [SerializeField] private GameObject programSelectPanel;
    [SerializeField] private GameObject programNewPanel;
    [SerializeField] private GameObject programListPanel;
    [SerializeField] private Transform programButtonContent;
    [SerializeField] private GameObject programButtonPrefab;

    [SerializeField] private TextMeshProUGUI programIdText;
    [SerializeField] private Button[] numberPadButtons; // 0-9까지의 버튼 배열
    [SerializeField] private Button backspaceButton;
    [SerializeField] private Button createProgramButton;
    [SerializeField] private Button openProgramButton;
    [SerializeField] private Button closeProgramListButton;

    // --- Presenter에게 보낼 이벤트들 ---
    public event Action<string> OnCreateProgramClicked;
    public event Action OnLoadProgramListRequested; // '불러오기' 버튼 클릭
    public event Action<string> OnProgramSelectedToLoad;
    public event Action OnOpenProgramClicked;
    public event Action OnSaveClicked;
    public event Action OnAddPointClicked;

    void Start()
    {
        loadProgramButton.onClick.AddListener(() => OnLoadProgramListRequested?.Invoke());
        openProgramButton.onClick.AddListener(() => OnOpenProgramClicked?.Invoke());
        //saveProgramButton.onClick.AddListener(() => OnSaveClicked?.Invoke());
        //addPointButton.onClick.AddListener(() => OnAddPointClicked?.Invoke());

        for (int i = 0; i < numberPadButtons.Length; i++)
        {
            string number = numberPadButtons[i].GetComponentInChildren<TextMeshProUGUI>().text;
            numberPadButtons[i].onClick.AddListener(() => AppendToInput(number));
        }

        backspaceButton.onClick.AddListener(HandleBackspace);
        createProgramButton.onClick.AddListener(HandleCreateClick);
        loadIconButton.onClick.AddListener(HandleLoadIconClick);
        closeProgramListButton.onClick.AddListener(HideProgramList);

        programSelectPanel.SetActive(true);
        programNewPanel.SetActive(true);
        programListPanel.SetActive(false);
        loadProgramButton.gameObject.SetActive(false);
        programIdText.text = string.Empty;
    }

    private void AppendToInput(string number)
    {
        programIdText.text += number;
    }

    private void HandleBackspace()
    {
        if (programIdText.text.Length > 0)
        {
            programIdText.text = programIdText.text.Substring(0, programIdText.text.Length - 1);
        }
    }

    private void HandleCreateClick()
    {
        string inputId = programIdText.text;
        OnCreateProgramClicked?.Invoke(inputId);
    }

    private void HandleLoadIconClick()
    {
        loadProgramButton.gameObject.SetActive(true);
    }

    // Presenter가 호출할 오류 메시지 표시 함수
    public void ShowMessage(string message)
    {
        Debug.LogWarning(message);
    }

    public void DisplayProgram(string programId)
    {
        if (programId == null)
        {
            //currentProgramIdText.text = "No Program Loaded";
            //endpointListText.text = "";
            Debug.Log("No Program Loaded");
            return;
        }
        Debug.Log($"연결된 프로그램: {programId}.job");

        //currentProgramIdText.text = "Current: " + program.programId;

        //System.Text.StringBuilder sb = new System.Text.StringBuilder();
        //for (int i = 0; i < program.endpointPositions.Count; i++)
        //{
        //    sb.AppendLine($"P{i + 1}: {program.endpointPositions[i].ToString("F2")}");
        //}
        //endpointListText.text = sb.ToString();
    }

    public void ShowProgramList(List<string> programIds)
    {
        foreach (Transform child in programButtonContent)
        {
            Destroy(child.gameObject);
        }

        foreach (string id in programIds)
        {
            GameObject buttonGO = Instantiate(programButtonPrefab, programButtonContent);

            TextMeshProUGUI buttonText = buttonGO.GetComponentInChildren<TextMeshProUGUI>();
            if (buttonText != null)
            {
                buttonText.text = id;
            }

            Button button = buttonGO.GetComponent<Button>();
            if (button != null)
            {
                string currentId = id;
                button.onClick.AddListener(() =>
                {
                    OnProgramSelectedToLoad?.Invoke(currentId);
                });
            }
        }
        programListPanel.SetActive(true);
        programNewPanel.SetActive(false);
    }

    public void HideProgramList()
    {
        programListPanel.SetActive(false);
        programNewPanel.SetActive(true);
    }

    public void HideProgramSelectPanel()
    {
        programSelectPanel.SetActive(false);
    }
}