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

namespace CSVReader
{
    public class SensorCSVReader
    {
        private string completeFileName;
        private char separator = ';';

        public SensorCSVReader(string filename)
        {
            completeFileName = Path.Combine(".", "Assets", "CSVInput", filename);
            if (!File.Exists(completeFileName))
            {
                completeFileName = "Err";
                Debug.Log("Unable to find Sensor File " + filename);
            }
        }

        /// <summary>
        /// Reads the entire File that has been found when Constructing the class instance. No streams are left open after the use of this method.
        /// If instance construction was not successfull, only return null.
        /// </summary>
        /// <returns>
        /// Returns a field of SensorObjects including all entries of the file
        /// </returns>
        public SensorObject[] ReadFile()
        {
            if (completeFileName == "Err")
            {
                return null;
            }
            string[] lines;
            try
            {
                lines = File.ReadAllLines(completeFileName);
            }
            catch (Exception e)
            {
                Debug.Log("Unable to Read Lines from Sensor File, " + e.Message);
                return null;
            }
            SensorObject[] sensors = new SensorObject[lines.Length];
            for (int i = 0; i < lines.Length; i++)
            {
                string[] elems = lines[i].Split(separator);
                try
                {
                    sensors[i] = new SensorObject(int.Parse(elems[0]), float.Parse(elems[1].Replace(',', '.'), CultureInfo.InvariantCulture),
                        float.Parse(elems[2].Replace(',', '.'), CultureInfo.InvariantCulture),
                        float.Parse(elems[3].Replace(',', '.'), CultureInfo.InvariantCulture),
                        float.Parse(elems[4].Replace(',', '.'), CultureInfo.InvariantCulture),
                        float.Parse(elems[5].Replace(',', '.'), CultureInfo.InvariantCulture),
                        float.Parse(elems[6].Replace(',', '.'), CultureInfo.InvariantCulture));
                }
                catch (Exception e)
                {
                    Debug.Log("Sensorfile Error \"" + e.Message + "\" at line " + i);
                    sensors[i] = null;
                }
            }
            return sensors;
        }
    }
}