using SO;
using SO.Channels;
using TMPro;
using UnityEngine;
using UnityEngine.Serialization;

public class MainScreenController : MonoBehaviour
{
    [SerializeField] private StepChangeChannelSO stepChangeChannel; 
    [SerializeField] private MachineChangeChannelSO machineChangeChannel;

    [SerializeField] private TextMeshProUGUI machineNameText;
    [SerializeField] private TextMeshProUGUI processNameText;
    [SerializeField] private TextMeshProUGUI stepNameText;
    [SerializeField] private TextMeshProUGUI stepDescriptionText;

    [SerializeField] private SimpleChannelSO documentChannel, videoChannel;
    [SerializeField] private GameObject documentPanel;
    [SerializeField] private GameObject videoPanel;
    
    [SerializeField] private GameObject documentButton;
    [SerializeField] private GameObject videoButton;

    [SerializeField] private bool focusPanel = true;
    [SerializeField] private bool disablePanelsOnStepChange = true;

    private void OnEnable()
    {
        stepChangeChannel.OnStepChanged += OnStepChanged;
        machineChangeChannel.OnMachineChange += OnMachineChanged;

        documentChannel.OnEventRaised += OnDocumentButtonClicked;
        videoChannel.OnEventRaised += OnVideoButtonClicked;
    }

    private void OnDisable()
    {
        stepChangeChannel.OnStepChanged -= OnStepChanged;
        machineChangeChannel.OnMachineChange -= OnMachineChanged;
        
        documentChannel.OnEventRaised -= OnDocumentButtonClicked;
        videoChannel.OnEventRaised -= OnVideoButtonClicked;
    }

    private void OnMachineChanged(MachineSO machine)
    {
        SetMachineName(machine);
        SetProcessName(machine);
        OnStepChanged(machine.Process.Steps[0]);
    }

    private void OnStepChanged(StepSO currentStep)
    {
        SetStepName(currentStep);
        SetStepDescription(currentStep);

        if (disablePanelsOnStepChange)
        {
            SetActive(videoPanel, false);
            SetActive(videoButton, true);
            SetActive(documentPanel, false);
            SetActive(documentButton, true);
        }
    }

    private void SetMachineName(MachineSO machine)
    {
        if (machineNameText == null)
        {
            Debug.LogError($"{nameof(machineNameText)} is null...", this.gameObject);
            return;
        }
        
        machineNameText.text = machine.MachineName;
    }

    private void SetProcessName(MachineSO machine)
    {
        if (processNameText == null)
        {
            Debug.LogError($"{nameof(processNameText)} is null...", this.gameObject);
            return;
        }

        processNameText.text = machine.Process.ProcessName;
    }

    private void SetStepName(StepSO currentStep)
    {
        if (stepNameText == null)
        {
            Debug.LogError($"{nameof(stepNameText)} is null...", this.gameObject);
            return;
        }
        
        stepNameText.text = currentStep.StepName;
    }

    private void SetStepDescription(StepSO currentStep)
    {
        if (stepDescriptionText == null)
        {
            Debug.LogError($"{nameof(stepDescriptionText)} is null...", this.gameObject);
            return;
        }

        stepDescriptionText.text = currentStep.Description;
    }

    private void SetActive(GameObject go, bool activeState)
    {
        if (go is null)
        {
            Debug.LogError($"{nameof(go)} is null...", this.gameObject);
            return;
        }
        
        go.SetActive(activeState);
    }

    public void OnVideoButtonClicked()
    {
        if (focusPanel)
        {
            SetActive(documentPanel, false);
            SetActive(documentButton, true);
        }
        
        SetActive(videoPanel, !videoPanel.activeSelf);
        SetActive(videoButton, !videoPanel.activeSelf);
    }
    
    public void OnDocumentButtonClicked()
    {
        if (focusPanel)
        {
            SetActive(videoPanel, false);
            SetActive(videoButton, true);
        }
        
        SetActive(documentPanel, !documentPanel.activeSelf);
        SetActive(documentButton, !documentPanel.activeSelf);
    }
}