using System;
using System.Globalization;
using UnityEngine;
using sam;

[CreateAssetMenu(fileName = "ERSPointDateExtractionFunc", menuName = "Date Extraction Funcs/ERS (POINT)")]
public class ERSPointDateExtractionFunc : DateExtractionFunc
{
    // eg: E1_REAP_ERS_ALT_2__19910803T211738_19910803T224717_RP01_iOS.NC.gz
    public override (DateTime, DateTime) ExtractDatesFromFilename(string filename)
    {
        // eg: 19910803T211738
        string format = "yyyyMMddTHHmmss";

        int li = filename.IndexOf("__");
        string s = filename.Substring(li + 2, 15);
        DateTime st = DateTime.ParseExact(s, format, CultureInfo.InvariantCulture);
        //Debug.Log($"start-time: {s} parsed as {st}");

        s = filename.Substring(li + 18, 15);
        DateTime et = DateTime.ParseExact(s, format, CultureInfo.InvariantCulture);
        //Debug.Log($"end-time: {s} parsed as {et}");

        return (st, et);
    }
}