using System.Linq.Expressions;
using NejCommon.Utils;

namespace NejCommon.Models;
public class DateTimeOffsetFrame : IEquatable<DateTimeOffsetFrame>
{
    public DateTimeOffsetFrame(){

    }
    public DateTimeOffsetFrame(DateTimeOffset fromDate, DateTimeOffset toDate)
    {
        FromDate = fromDate;
        ToDate = toDate;
    }
    
    public DateTimeOffset FromDate { get; set; } = DateTimeOffset.MinValue;
    public DateTimeOffset ToDate { get; set; } = DateTimeOffset.MaxValue;

    public override string ToString()
    {
        var from = (FromDate == DateTimeOffset.MinValue) ? "" : ("-" + FromDate.ToString("yyyy-MM-dd"));
        var to = (ToDate == DateTimeOffset.MaxValue) ? "" : ("-" + ToDate.ToString("yyyy-MM-dd"));
        return $"{from}{to}";
    }

    public static Expression<Func<TType, bool>> Conditional<TType>(Expression<Func<TType, DateTimeOffset>> dateAcessor, DateTimeOffsetFrame frame)
    {
        return e => dateAcessor.Compile()(e) >= frame.FromDate && dateAcessor.Compile()(e) <= frame.ToDate;
    }

    public DateOnlyFrame ToDateOnlyFrame()
    {
        return new DateOnlyFrame(FromDate.ToDateOnly(), ToDate.ToDateOnly());
    }
    public bool Equals(DateTimeOffsetFrame? other)
    {
        if (other is null) return false;
        return this.FromDate == other.FromDate && this.ToDate == other.ToDate;
    }
    public override int GetHashCode()
        => HashCode.Combine(FromDate, ToDate);

    public static bool operator ==(DateTimeOffsetFrame? left, DateTimeOffsetFrame? right)
        => left?.Equals(right) ?? right is null;

    public static bool operator !=(DateTimeOffsetFrame? left, DateTimeOffsetFrame? right)
        => !(left?.Equals(right) ?? right is null);
}