using System;
using System.Collections;
using System.Text;
using System.Threading.Tasks;
using TMPro;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class ChatroomMenu : MonoBehaviour
{
    public TMP_Text statusText;
    public Button backButton;
    public Button sendButton;
    public TMP_InputField messageInputField;
    public GameObject content;
    public GameObject sampleObject;
    private string statusMessage;
    private Coroutine statusRoutine;
    private Coroutine refreshLoopRoutine;

    void Start()
    {
        backButton.onClick.AddListener(async () => await SceneManager.LoadSceneAsync("MainMenu"));
        sendButton.onClick.AddListener(async () => await HandleMessageSubmit());
        messageInputField.textComponent.textWrappingMode = TextWrappingModes.Normal;
        messageInputField.onSubmit.AddListener(async (_) => await HandleMessageSubmit());
        refreshLoopRoutine = StartCoroutine(Loop());
    }

    IEnumerator Loop() {
        while (true) {
            Refresh();
            yield return new WaitForSeconds(3f);
        }
    }

    async Task HandleMessageSubmit()
    {
        var text = messageInputField.text.Clone() as string;
        messageInputField.text = string.Empty;
        if (string.IsNullOrEmpty(text))
        {
            return;
        }

        EncryptedWWWForm dataForm = new();
        dataForm.AddField("content", text);
        dataForm.AddField("gameSession", PlayerPrefs.GetString("gameSession", ""));
        using UnityWebRequest request = UnityWebRequest.Post(SensitiveInfo.SERVER_DATABASE_PREFIX + "sendChatroomMessage.php", dataForm.GetWWWForm());
        request.SetRequestHeader("Requester", "BerryDashClient");
        request.SetRequestHeader("ClientVersion", Application.version);
        request.SetRequestHeader("ClientPlatform", Application.platform.ToString());
        await request.SendWebRequest();
        if (request.result != UnityWebRequest.Result.Success)
        {
            return;
        }
        string response = SensitiveInfo.Decrypt(request.downloadHandler.text, SensitiveInfo.SERVER_RECEIVE_TRANSFER_KEY);
        switch (response)
        {
            case "-999":
                ShowStatus("Server error while fetching data");
                break;
            case "-998":
                ShowStatus("Client version too outdated to access servers");
                break;
            case "-997":
                ShowStatus("Encryption/decryption issues");
                break;
            case "-1":
                ShowStatus("Authentication error");
                break;
            case "1":
                StopCoroutine(refreshLoopRoutine);
                refreshLoopRoutine = StartCoroutine(Loop());
                content.transform.localPosition = new Vector2(0f, 0f);
                break;
        }
    }

    void ShowStatus(string content)
    {
        statusMessage = content;
        if (statusRoutine != null) StopCoroutine(statusRoutine);
        statusRoutine = StartCoroutine(StatusRoutine());
    }

    IEnumerator StatusRoutine()
    {
        statusText.gameObject.SetActive(true);
        statusText.text = statusMessage;
        statusText.color = new Color(statusText.color.r, statusText.color.g, statusText.color.b, 0f);

        float t = 0f;
        while (t < 0.5f)
        {
            t += Time.deltaTime;
            float a = t / 0.5f;
            statusText.color = new Color(statusText.color.r, statusText.color.g, statusText.color.b, a);
            yield return null;
        }

        yield return new WaitForSeconds(2f);

        t = 0f;
        while (t < 0.5f)
        {
            t += Time.deltaTime;
            float a = 1f - (t / 0.5f);
            statusText.color = new Color(statusText.color.r, statusText.color.g, statusText.color.b, a);
            yield return null;
        }

        statusText.gameObject.SetActive(false);
        statusText.text = "";
        statusRoutine = null;
    }

    async void Refresh()
    {
        using UnityWebRequest request = UnityWebRequest.Get(SensitiveInfo.SERVER_DATABASE_PREFIX + "getChatroomMessages.php");
        request.SetRequestHeader("Requester", "BerryDashClient");
        request.SetRequestHeader("ClientVersion", Application.version);
        request.SetRequestHeader("ClientPlatform", Application.platform.ToString());
        await request.SendWebRequest();
        if (request.result != UnityWebRequest.Result.Success)
        {
            Debug.LogError("Failed to fetch chatroom messages: " + request.error);
            return;
        }
        string response = SensitiveInfo.Decrypt(request.downloadHandler.text, SensitiveInfo.SERVER_RECEIVE_TRANSFER_KEY);
        var shouldClear = true;
        switch (response)
        {
            case "-999":
                ShowStatus("Server error while fetching data");
                break;
            case "-998":
                ShowStatus("Client version too outdated to access servers");
                break;
            case "-997":
                ShowStatus("Encryption/decryption issues");
                break;
            default:
                var split = response.Split(':');
                if (split[0] == "1")
                {
                    shouldClear = false;
                    foreach (var row in split[1].Split("|"))
                    {
                        var rowSplit = row.Split(';');
                        var id = rowSplit[0];
                        var username = Encoding.UTF8.GetString(Convert.FromBase64String(rowSplit[1]));
                        var chatContent = Encoding.UTF8.GetString(Convert.FromBase64String(rowSplit[2]));
                        var icon = rowSplit[3];
                        var overlay = rowSplit[4];
                        var uid = rowSplit[5];
                        var birdR = rowSplit[6];
                        var birdG = rowSplit[7];
                        var birdB = rowSplit[8];

                        if (content.transform.Find("ChatroomRow_" + id) != null)
                        {
                            continue;
                        }
                        if (content.transform.childCount > 50)
                        {
                            var firstChild = content.transform.GetChild(0);
                            Destroy(firstChild.gameObject);
                        }

                        var rowInfo = Instantiate(sampleObject, content.transform);
                        var usernameText = rowInfo.transform.GetChild(0).GetComponent<TMP_Text>();
                        var playerIcon = usernameText.transform.GetChild(0).GetComponent<Image>();
                        var playerOverlayIcon = playerIcon.transform.GetChild(0).GetComponent<Image>();
                        var messageText = rowInfo.transform.GetChild(1).GetComponent<TMP_Text>();

                        usernameText.text = username;
                        messageText.text = chatContent;
                        playerIcon.sprite = Resources.Load<Sprite>("Icons/Icons/bird_" + icon);
                        if (icon == "1")
                        {
                            playerIcon.sprite = Tools.GetIconForUser(int.Parse(uid));
                        }
                        playerOverlayIcon.sprite = Resources.Load<Sprite>("Icons/Overlays/overlay_" + overlay);
                        if (overlay == "0")
                        {
                            playerOverlayIcon.gameObject.SetActive(false);
                        }
                        else if (overlay == "8")
                        {
                            playerOverlayIcon.transform.localPosition = new Vector2(-16.56f, 14.81f);
                        }
                        else if (overlay == "11")
                        {
                            playerOverlayIcon.transform.localPosition = new Vector2(-14.74451f, 20.39122f);
                        }
                        else if (overlay == "13")
                        {
                            playerOverlayIcon.transform.localPosition = new Vector2(-16.54019f, 14.70365f);
                        }
                        try
                        {
                            playerIcon.color = new Color32(byte.Parse(birdR), byte.Parse(birdG), byte.Parse(birdB), 255);
                        } catch (Exception)
                        {
                            playerIcon.color = Color.white;
                        }
                        rowInfo.name = "ChatroomRow_" + id;
                        rowInfo.SetActive(true);
                    }
                }
                else
                {
                    ShowStatus("Error fetching messages.");
                }
                break;
        }
        if (shouldClear)
        {
            foreach (Transform item in content.transform)
            {
                if (item.gameObject.activeSelf)
                {
                    Destroy(item.gameObject);
                }
            }
        }
    }
}