using UnityEngine;
using System.Collections.Generic;
using System.IO;
using System;

[DefaultExecutionOrder(20)]
[RequireComponent(typeof(InstantiatePrefab))]
public class ReadFromCSV : MonoBehaviour
{
    private Tuple<List<float>, List<Vector3>, List<Quaternion>, List<float>>[][] humansData;

    // Get Thief
    [HideInInspector]
    public int thief_i;
    [HideInInspector]
    public int thief_j;

    private void Start()
    {
        GameObject[][] humansGO = gameObject.GetComponent<InstantiatePrefab>().humanGameObject;
        humansData = new Tuple<List<float>, List<Vector3>, List<Quaternion>, List<float>>[humansGO.Length][];

        for(int i = 0; i < humansGO.Length; i++)
        {
            humansData[i] = new Tuple<List<float>, List<Vector3>, List<Quaternion>, List<float>>[humansGO[i].Length];
            for(int j = 0; j < humansData[i].Length; j++)
            {
                humansData[i][j] = new Tuple<List<float>, List<Vector3>, List<Quaternion>, List<float>>(new List<float>(), new List<Vector3>(), new List<Quaternion>(), new List<float>());
            }
        }
    }

    /// <summary>
    /// Reads from the given path the csv file
    /// </summary>
    /// <param name="path">The path were the csv file is located</param>
    /// <returns>A matrix of tuples with the following order in the tuple: time; Position; Rotation; Speed</returns>
    /// <exception cref="ApplicationException"></exception>
    public Tuple<List<float>, List<Vector3>, List<Quaternion>, List<float>>[][] ReadFromCSVFile(string path)
    {
        if(!File.Exists(path)) return null;
        
        try
        {
            using (StreamReader reader = new StreamReader(path, true))
            {
                // Skip header
                reader.ReadLine();

                while (!reader.EndOfStream)
                {
                    var line = reader.ReadLine();
                    var values = line.Split(';');

                    /*
                     * Value 0  : Time
                     * Value 1-2: i,j
                     * Value 3-5: Position
                     * Value 6-9: Rotation
                     * Value 10 : Speed
                     * Value 11 : Thief YES/NO
                     */

                    // Set i, j position in matrix
                    int i = int.Parse(values[1]);
                    int j = int.Parse(values[2]);

                    // Add into timer list
                    humansData[i][j].Item1.Add(float.Parse(values[0]));

                    // Add into position list
                    humansData[i][j].Item2.Add(new Vector3(
                        float.Parse(values[3]),
                        float.Parse(values[4]),
                        float.Parse(values[5])));

                    // Add into rotation list
                    humansData[i][j].Item3.Add(new Quaternion(
                        float.Parse(values[6]),
                        float.Parse(values[7]),
                        float.Parse(values[8]),
                        float.Parse(values[9])));

                    humansData[i][j].Item4.Add(float.Parse(values[10]));

                    if (values[11] == "1")
                    {
                        thief_i = i;
                        thief_j = j;
                    }
                }
            }
        }
        catch (Exception e)
        {
            throw new ApplicationException("Something went wrong by reading from a csv file: ", e);
        }

        return humansData;
    }
}