#nullable enable

using Cysharp.Threading.Tasks;
using ShrinkDataSaver;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace ShrinkApp.Starter.Basic
{
    public sealed class ShrinkAppBasicSampleController : MonoBehaviour
    {
        [SerializeField] private Text? statusText;
        [SerializeField] private Text? detailText;
        [SerializeField] private Text? outputText;
        [SerializeField] private Text? moduleText;
        [SerializeField] private Text? serviceText;
        [SerializeField] private Text? saveMetaText;
        [SerializeField] private Text? commandListText;
        [SerializeField] private Text? networkText;
        [SerializeField] private Button? saveButton;
        [SerializeField] private Button? loadButton;
        [SerializeField] private Button? commandButton;
        [SerializeField] private Button? loopbackButton;
        [SerializeField] private Button? refreshButton;
        [SerializeField] private Button? clearOutputButton;
        [SerializeField] private Button? disconnectLoopbackButton;
        [SerializeField] private InputField? commandInputField;

        private int _counter;
        private readonly List<string> _outputLines = new();

        private void Awake()
        {
            if (saveButton != null)
                saveButton.onClick.AddListener(() => SaveAsync().Forget());
            if (loadButton != null)
                loadButton.onClick.AddListener(() => LoadAsync().Forget());
            if (commandButton != null)
                commandButton.onClick.AddListener(() => RunCommandAsync().Forget());
            if (loopbackButton != null)
                loopbackButton.onClick.AddListener(BindLoopback);
            if (refreshButton != null)
                refreshButton.onClick.AddListener(RefreshPanels);
            if (clearOutputButton != null)
                clearOutputButton.onClick.AddListener(ClearOutput);
            if (disconnectLoopbackButton != null)
                disconnectLoopbackButton.onClick.AddListener(DisconnectLoopback);
        }

        private void Start()
        {
            var settings = ShrinkAppBasicDemoRuntime.GetOrCreateSettings();
            if (commandInputField != null)
                commandInputField.text = settings.defaultCommandText;

            var autoLoopbackMessage = ShrinkAppBasicDemoRuntime.AutoBindLoopbackIfEnabled();
            RefreshStatus("ShrinkApp Basic starter ready.");
            if (!string.IsNullOrWhiteSpace(autoLoopbackMessage))
                AppendOutput(autoLoopbackMessage);
            RefreshPanels();

            if (settings.autoRunDefaultCommandOnStart)
                RunCommandAsync().Forget();
        }

        private async UniTaskVoid SaveAsync()
        {
            _counter++;
            ShrinkSettings.Set("ShrinkApp.Basic.Counter", _counter);
            await ShrinkSave.SaveSlotAsync(0);
            RefreshStatus($"Saved counter={_counter}, recentSlot={ShrinkSave.GetRecentSlotIndex()}");
            AppendOutput("save: slot 0");
            RefreshPanels();
        }

        private async UniTaskVoid LoadAsync()
        {
            if (await ShrinkSave.SlotExistsAsync(0))
                await ShrinkSave.LoadSlotAsync(0);

            _counter = ShrinkSettings.Get("ShrinkApp.Basic.Counter", 0);
            RefreshStatus($"Loaded counter={_counter}, loadedSlot={ShrinkSave.LoadedSlot}");
            AppendOutput("load: slot 0");
            RefreshPanels();
        }

        private async UniTaskVoid RunCommandAsync()
        {
            var message = await ShrinkAppBasicDemoRuntime.ExecuteCommandAsync(commandInputField?.text, AppendOutput);
            RefreshStatus(message);
            RefreshPanels();
        }

        private void BindLoopback()
        {
            var message = ShrinkAppBasicDemoRuntime.EnsureLoopbackReady();
            AppendOutput(message);
            RefreshStatus(message);
            RefreshPanels();
        }

        private void DisconnectLoopback()
        {
            var message = ShrinkAppBasicDemoRuntime.DisconnectLoopback();
            AppendOutput(message);
            RefreshStatus(message);
            RefreshPanels();
        }

        private void RefreshPanels()
        {
            RefreshDetail(ShrinkAppBasicDemoRuntime.BuildDetailedStatus());
            RefreshInspectorText().Forget();
        }

        private void RefreshStatus(string text)
        {
            if (statusText != null)
                statusText.text = text;

            Debug.Log("[ShrinkApp.Starter.Basic] " + text);
        }

        private void RefreshDetail(string text)
        {
            if (detailText != null)
                detailText.text = text;
        }

        private void AppendOutput(string text)
        {
            if (string.IsNullOrWhiteSpace(text))
                return;

            var settings = ShrinkAppBasicDemoRuntime.GetOrCreateSettings();
            _outputLines.Add(text.Trim());
            while (_outputLines.Count > settings.maxCommandOutputLines)
                _outputLines.RemoveAt(0);

            if (outputText != null)
                outputText.text = string.Join("\n", _outputLines);
        }

        private void ClearOutput()
        {
            _outputLines.Clear();
            if (outputText != null)
                outputText.text = string.Empty;
        }

        private async UniTaskVoid RefreshInspectorText()
        {
            if (saveMetaText != null)
            {
                var metas = await ShrinkSave.GetAllMetaAsync();
                saveMetaText.text = ShrinkAppBasicDemoRuntime.BuildSaveMetaSummary(metas);
            }

            if (moduleText != null)
                moduleText.text = ShrinkAppBasicDemoRuntime.BuildModuleSummary();

            if (serviceText != null)
                serviceText.text = ShrinkAppBasicDemoRuntime.BuildServiceSummary();

            if (commandListText != null)
                commandListText.text = ShrinkAppBasicDemoRuntime.BuildCommandListSummary();

            if (networkText != null)
                networkText.text = ShrinkAppBasicDemoRuntime.BuildNetworkSummary();
        }
    }
}