using System;
using System.Collections.Generic;
using System.Linq;

namespace EvoCalculator.Core.Tools.GroupColumns;

public static partial class GroupColumns
{
    public static List<KeyValuePair<DateTime, decimal>>
        Merge(params List<KeyValuePair<DateTime, decimal>>[] pairs)
    {
        return pairs.Length switch
        {
            > 1 => pairs
                .SelectMany(pair => pair)
                .Select((x, i) => new KeyValuePair<DateTime, decimal>(x.Key, x.Value))
                .ToList(),
            _ => pairs.FirstOrDefault()
        };
    }
}