using Gs2.Unity.Util;
using System;
using System.Threading.Tasks;
using UnityEngine;
using GS2Studio.Generated.Quest;
using GS2Studio.Generated.Progress;
using GS2Studio.Generated.Wallet;
using GS2Studio.Generated.Energy;
using GS2Studio.Generated.LoginRewardCollection;
using GS2Studio.Generated.Mission;
using GS2Studio.Generated.MissionCounter;

public sealed class AdventureStudioView : MonoBehaviour
{
    [SerializeField] private QuestListHandler quests;
    private bool busy;
    private string purchaseId;
    private bool unresolved;
    private string message = "";
    [SerializeField] private ProgressHandler progress;
    [SerializeField] private WalletHandler wallet;
    [SerializeField] private EnergyHandler energy;

    [SerializeField] private LoginRewardCollectionHandler loginReward;
    [SerializeField] private MissionHandler mission;
    [SerializeField] private MissionCounterHandler counter;

    [SerializeField] private string missionGroup = "adventure";
    [SerializeField] private string missionName = "clear3";

    private void Awake()
    {
        loginReward.SetKeys("daily");
        mission.SetKeys(missionName, missionGroup);
        mission.SetSdkKeys(missionGroup);
        counter.SetKeys("clear");
    }

    private void OnEnable()
    {
        if (quests != null) quests.Failed += ShowLoadError;
        if (progress != null) progress.Failed += ShowLoadError;
        if (wallet != null) wallet.Failed += ShowLoadError;
        if (energy != null) energy.Failed += ShowLoadError;
        loginReward.Failed += ShowLoadError;
        mission.Failed += ShowLoadError;
        counter.Failed += ShowLoadError;
    }

    private void OnDisable()
    {
        if (quests != null) quests.Failed -= ShowLoadError;
        if (progress != null) progress.Failed -= ShowLoadError;
        if (wallet != null) wallet.Failed -= ShowLoadError;
        if (energy != null) energy.Failed -= ShowLoadError;
        loginReward.Failed -= ShowLoadError;
        mission.Failed -= ShowLoadError;
        counter.Failed -= ShowLoadError;
    }

    private void ShowLoadError(Exception error)
    {
        message = "Could not load: " + error.GetType().Name;
    }

    private void OnGUI()
    {
        var sessionHolder = Gs2GameSessionHolder.Instance;
        if (quests == null || sessionHolder == null || !sessionHolder.Initialized)
        {
            return;
        }

        GUILayout.BeginArea(new Rect(20, 100, 650, 650), GUI.skin.box);
        GUILayout.Label(message);

        if (quests.IsLoaded)
        {
            DrawQuestButtons();
            DrawPlayerStatus();
            DrawShop();
            DrawDailyRewards();
        }
        else
        {
            GUILayout.Label("Loading adventures...");
        }

        GUI.enabled = true;
        GUILayout.EndArea();
    }

    private void DrawQuestButtons()
    {
        var canOperate = !busy && !unresolved && progress.HasValue;

        GUI.enabled = canOperate && !progress.Model.InProgress;
        foreach (var quest in quests.Binders)
        {
            GUILayout.Label(quest.DisplayName);
            if (GUILayout.Button("Start: " + quest.DisplayName))
            {
                Run(() => quest.Start());
            }
        }

        GUI.enabled = canOperate && progress.Model.InProgress;
        if (GUILayout.Button("Complete"))
        {
            Run(() => progress.Binder.Complete());
        }
        GUI.enabled = true;
    }

    private void DrawPlayerStatus()
    {
        GUILayout.Label(wallet.HasValue
            ? "Coins: " + wallet.Model.Free
            : "Loading coins...");

        if (!progress.HasValue)
        {
            GUILayout.Label("Loading progress...");
        }
        else
        {
            GUILayout.Label(progress.Model.InProgress
                ? "Adventure in progress"
                : "Choose an adventure");
        }

        GUILayout.Label(energy.HasValue
            ? "Stamina: " + energy.Model.CurrentValue
            : "Loading stamina...");
    }

    private void DrawShop()
    {
        GUI.enabled = !busy && (!unresolved || purchaseId != null);
        if (GUILayout.Button(purchaseId == null ? "Restore 10 stamina for 20 coins" : "Retry the same purchase"))
        {
            Run(Buy, retryPurchase: purchaseId != null);
        }
        GUI.enabled = true;
    }

    private void DrawDailyRewards()
    {
        GUILayout.Space(12);
        GUILayout.Label("Login rewards and missions");
        if (!loginReward.HasValue || !mission.HasValue || !counter.HasValue)
        {
            GUILayout.Label("Loading reward details...");
            return;
        }

        var steps = loginReward.Model.ReceivedSteps;
        for (var day = 0; day < 3; day++)
        {
            var received = steps != null && day < steps.Count && steps[day];
            GUILayout.Label($"Day {day + 1}: {(day + 1) * 10} coins / " +
                (received ? "Claimed" : "Not claimed"));
        }

        GUI.enabled = !busy && !unresolved;
        if (GUILayout.Button("Claim today's login reward"))
            Run(() => loginReward.Binder.Receive());

        GUILayout.Label($"Total adventures completed: {counter.Model.TotalValue}");
        GUILayout.Label(mission.Model.Received ? "Claimed" :
            mission.Model.Completed ? "You can claim the 30-coin mission reward" : "Mission in progress");
        GUI.enabled = !busy && !unresolved && mission.Model.Completed && !mission.Model.Received;
        if (GUILayout.Button("Claim 30-coin mission reward"))
            Run(() => mission.Binder.Receive());
        GUI.enabled = true;
    }

    private async void Run(Func<Task> operation, bool retryPurchase = false)
    {
        if (busy || (unresolved && !retryPurchase)) return;
        busy = true;
        unresolved = true;
        message = "Processing...";
        try
        {
            await operation();
            unresolved = false;
            message = "Action completed";
        }
        catch (Exception error)
        {
            if (error is Gs2.Gs2Stamina.Exception.InsufficientException ||
                          error is Gs2.Gs2Money2.Exception.InsufficientException)
            {
                unresolved = false;
                purchaseId = null;
                message = error is Gs2.Gs2Stamina.Exception.InsufficientException
                    ? "Not enough stamina. Recover stamina and try again."
                    : "Not enough coins. Earn more in adventures and try again.";
            }
            else if (error is Gs2.Core.Exception.BadRequestException)
            {
                unresolved = false;
                purchaseId = null;
                message = "Action failed: " + error.Message;
            }
            else message = purchaseId != null
                ? "Check the connection and retry the same purchase: " + error.GetType().Name
                : "Cannot confirm the result. New actions are paused: " + error.GetType().Name;
        }
        finally { busy = false; }
    }

    private async Task Buy()
    {
        purchaseId ??= Guid.NewGuid().ToString();
        var request = Gs2ClientHolder.Instance.Gs2.Exchange.Namespace("EnergyProduct")
            .Me(Gs2GameSessionHolder.Instance.GameSession).Exchange();
        var transaction = await request.ExchangeAsync(
            "refill", 1, speculativeExecute: false, duplicationAvoider: purchaseId);
        if (transaction != null) await transaction.WaitAsync(all: true);
        purchaseId = null;
    }
}