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

/// <summary>
/// Class to handle minigame list progress display
/// </summary>
public class PanelMinigameProgress : MonoBehaviour
{
    /// <summary>
    /// Reference to the current user
    /// </summary>
    private User user;

    /// <summary>
    /// Reference to the minigames list
    /// </summary>
    public MinigameList minigameList;

    /// <summary>
    /// Prefab of a minigame card
    /// </summary>
    public GameObject minigameCardPrefab;

    /// <summary>
    /// UI reference to the container holding all the minigame cards
    /// </summary>
    public Transform minigamesContainer;

    /// <summary>
    /// UI reference to the minigame info panel
    /// </summary>
    public GameObject minigameInfo;

    /// <summary>
    /// UI reference to the message that displays when no minigame progress is present
    /// </summary>
    public GameObject emptyMinigames;

    /// <summary>
    /// UI reference to the plot
    /// </summary>
    public ProgressGraph progressGraph;

    /// <summary>
    /// Reference to the title of the minigame of the info panel
    /// </summary>
    public TMP_Text minigameTitle;

    /// <summary>
    /// Reference to the text that will display when an empty minigame progress object is selected
    /// </summary>
    public GameObject emptyHighscore;

    /// <summary>
    /// Current selected course
    /// </summary>
    private int selectedMinigame = 0;

    /// <summary>
    /// List of course backgrounds and indices
    /// </summary>
    private List<Tuple<Image, MinigameIndex>> minigameCards = new List<Tuple<Image, MinigameIndex>>();

    /// <summary>
    /// Start is called before the first frame update
    /// </summary>
    void Start()
    {
        PersistentDataController.GetInstance().Load();
        user = UserList.GetCurrentUser();

        var minigames = user.GetMinigames();
        minigameInfo.SetActive(minigames.Count > 0);
        emptyMinigames.SetActive(minigames.Count <= 0);
        int i = 0;
        foreach (var minigameProgress in minigames)
        {
            // Create instance of prefab
            GameObject instance = GameObject.Instantiate(minigameCardPrefab, minigamesContainer);
            int j = i++;

            // Initialize card
            MinigameProgressCard mpc = instance.GetComponent<MinigameProgressCard>();
            mpc.minigameProgress = minigameProgress;
            mpc.selectActivity = () => UpdateSelection(j);

            // Store reference to background so we can apply fancy coloring
            Image background = instance.GetComponent<Image>();
            background.color = Color.gray;
            minigameCards.Add(Tuple.Create(background, minigameProgress.minigameIndex));
        }
        if (0 < minigames.Count)
            UpdateSelection(0);
    }

    /// <summary>
    /// Update the current selected course
    /// </summary>
    /// <param name="newMinigame">Index to the new course</param>
    private void UpdateSelection(int newMinigame)
    {
        minigameCards[selectedMinigame].Item1.color = Color.gray;
        selectedMinigame = newMinigame;
        minigameCards[selectedMinigame].Item1.color = Color.blue;

        var progress = user.GetMinigameProgress(minigameCards[selectedMinigame].Item2);
        minigameTitle.text = minigameList.GetMinigameByIndex(progress.minigameIndex).title;

        List<Score> latestScores = progress.latestScores;
        List<Score> highestScores = progress.highestScores;
        if (0 < highestScores.Count)
        {
            emptyHighscore.SetActive(false);
            progressGraph.gameObject.SetActive(true);
            progressGraph.Plot(latestScores.ConvertAll<double>((s) => (double)s.scoreValue), highestScores.Max((s) => s.scoreValue));
        }
        else
        {
            emptyHighscore.SetActive(true);
            progressGraph.gameObject.SetActive(false);
        }
    }
}