namespace XFEExtension.NetCore.ArrayExtension;

/// <summary>
/// 对数组的拓展
/// </summary>
public static class ArrayExtension
{
    private static readonly string[] separator = ["[+-", "-+]"];
    /// <summary>
    /// 将数组转换为XFE格式字符串
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="arrays"></param>
    /// <returns></returns>
    public static string ToXFEString<T>(this T[] arrays)
    {
        string str = string.Empty;
        foreach (var ary in arrays)
        {
            if (ary is not null)
                str += $"[+-{ary?.ToString()?.Replace("[+", "[++").Replace("+]", "++]")}-+]";
        }
        return str;
    }
    /// <summary>
    /// 将数组转换为XFE格式字符串
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="arrays"></param>
    /// <param name="propertyName">属性名称</param>
    /// <returns></returns>
    public static string ToXFEString<T>(this T[] arrays, string propertyName) where T : class
    {
        string str = string.Empty;
        foreach (var ary in arrays)
        {
            if (ary is not null)
                str += $"[+-{ary?.GetType()?.GetProperty(propertyName)?.GetValue(ary)?.ToString()?.Replace("[+", "[++").Replace("+]", "++]")}-+]";
        }
        return str;
    }


    /// <summary>
    /// 将XFE格式字符串转换为数组
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="str"></param>
    /// <returns>T类型的数组</returns>
    public static T[] ToXFEArray<T>(this string str)
    {
        string[] strings = str.Split(separator, StringSplitOptions.None);
        for (int i = 0; i < strings.Length; i++)
        {
            strings[i] = strings[i].Replace("[++", "[+").Replace("++]", "+]");
        }
        T[] array = new T[(strings.Length - 1) / 2];
        for (int i = 0, j = 1; i < array.Length; i++, j += 2)
        {
            array[i] = (T)Convert.ChangeType(strings[j], typeof(T));
        }
        return array;
    }
    /// <summary>
    /// 获取数组中的类型
    /// </summary>
    /// <param name="objects"></param>
    /// <returns></returns>
    public static Type[]? GetTypes(this object[] objects)
    {
        if (objects is null)
            return null;
        Type[] types = new Type[objects.Length];
        for (int i = 0; i < objects.Length; i++)
        {
            types[i] = objects[i].GetType();
        }
        return types;
    }
}