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

/// <summary>
/// Manager infopage for the Minigames
/// </summary>
public class MinigameActivityScreen : MonoBehaviour
{
    /// <summary>
    /// Reference to the Minigames
    /// </summary>
    public MinigameList minigameList;

    /// <summary>
    /// Title Display
    /// </summary>
    public TMP_Text title;

    /// <summary>
    /// Description Display
    /// </summary>
    public TMP_Text description;

    /// <summary>
    /// Image Display (Thumbnail)
    /// </summary>
    public Image gameImage;

    /// <summary>
    /// PlayButton to get to the Minigame
    /// </summary>
    public Button button;

    /// <summary>
    /// Control explanation for the Display
    /// </summary>
    public TMP_Text controls;

    /// <summary>
    /// Reference to the Minigame progress
    /// </summary>
    private PersistentDataController.SavedMinigameProgress progress;

    /// <summary>
    /// Reference to the users-high-scores container object
    /// </summary>
    public Transform userContainer;

    /// <summary>
    /// Prefab for the high-score-entries
    /// </summary>
    public GameObject prefab;

    /// <summary>
    /// Reference to the ranking title
    /// </summary>
    public GameObject rankingTitle;

    /// <summary>
    /// Sets the infopage for a given minigame
    /// </summary>
    void Start()
    {
        PersistentDataController.GetInstance().Load();
        GenerateContent();
        GenerateHighScores();
    }

    /// <summary>
    /// Generates all content except for the HighScores
    /// </summary>
    private void GenerateContent()
    {
        // Get current minigame
        int index = minigameList.currentMinigameIndex;
        Minigame minigame = minigameList.minigames[index];

        // Set main screen
        title.text = minigame.title;
        description.text = minigame.description;
        gameImage.sprite = minigame.thumbnail;
        controls.text = minigame.controls;

        // Add click 
        if (minigame.themeList != null)
        {
            button.onClick.AddListener(() => SystemController.GetInstance().LoadNextScene("Common/Scenes/ThemeSelectionScreen"));
        }
        else
        {
            button.onClick.AddListener(() => SystemController.GetInstance().LoadNextScene(minigame.minigameEntryPoint));
        }
    }

    /// <summary>
    /// Sets the High Scores (Top 3)
    /// </summary>
    /// <remarks>
    /// TODO: Maybe write a getter for the sorted scores as this is just a copy of the logic implemented in SpellingBee/.../GameController
    /// </remarks>
    private void GenerateHighScores()
    {
        // Get current minigame
        int index = minigameList.currentMinigameIndex;
        Minigame minigame = minigameList.minigames[index];

        List<Tuple<string, Sprite, Score>> allScores = new List<Tuple<string, Sprite, Score>>();
        foreach (User user in UserList.GetUsers())
        {
            // Get user's progress for this minigame
            progress = user.GetMinigameProgress(minigame.index);
            if (progress != null)
            {
                // Add scores to dictionary
                List<Score> scores = progress.highestScores;
                foreach (Score score in scores)
                {
                    allScores.Add(new Tuple<string, Sprite, Score>(user.GetUsername(), user.GetAvatar(), score));
                }
            }
        }

        rankingTitle.SetActive(allScores.Count > 0);

        // Sort allScores based on Score.scoreValue
        allScores.Sort((a, b) => b.Item3.scoreValue.CompareTo(a.Item3.scoreValue));

        // Instantiate scoreboard entries
        foreach (Tuple<string, Sprite, Score> tup in allScores.Take(3))
        {
            string username = tup.Item1;
            Sprite sprite = tup.Item2;
            Score score = tup.Item3;

            GameObject instance = GameObject.Instantiate(prefab, userContainer);
            instance.transform.Find("Title").GetComponent<TMP_Text>().text = username;
            instance.transform.Find("Avatar").GetComponent<Image>().sprite = sprite;
            instance.transform.Find("Score").GetComponent<TMP_Text>().text = score.scoreValue.ToString();
        }
    }
}