namespace StopShopping.Services.Models.Resp;

public class PagedResult<T>
{
    public int PageCount { get; set; }
    public int PageSize { get; set; }
    public int PageIndex { get; set; }
    public List<T> Data { get; set; } = [];
}

public static class PagedQueryExtensions
{
    public static async Task<PagedResult<T>> ToPagedAsync<T>(this IAsyncEnumerable<T> query
        , int pageIndex = 1
        , int pageSize = 20)
    {
        PagedResult<T> result = new()
        {
            PageSize = pageSize,
            PageIndex = pageIndex
        };

        var total = await query.CountAsync();
        result.PageCount = (int)Math.Ceiling(total / (decimal)result.PageSize);
        result.Data = await query
            .Skip((result.PageIndex - 1) * result.PageSize)
            .Take(result.PageSize)
            .ToListAsync();

        return result;
    }
}