namespace Larpl.Extensions
{
    public static class DiscordExtensions
    {
        static void ValidateEmbed(dynamic d, out bool has_fields, out bool has_timestamp, out bool has_color, out bool has_description)
        {
            try { has_fields = !(d.fields is null); }
            catch { has_fields = false; }

            try { has_timestamp = !(d.timestamp is null); }
            catch { has_timestamp = false; }

            try { has_color = !(d.color is null); }
            catch { has_color = false; }

            try { has_description = !(d.description is null); }
            catch { has_description = false; }
        }

        public static DiscordEmbedBuilder CreateNewDynamicEmbed(dynamic d)
        {
            var temp = new DiscordEmbedBuilder();

            if (d is null)
                return temp;

            ValidateEmbed(d, out bool has_fields,
                out bool has_timestamp,
                out bool has_color,
                out bool has_description);

            if (has_fields)
            {
                foreach(var field in d.fields)
                {
                    string name = default;
                    string value = default;
                    bool is_inline = default;

                    if (Dynamic_IsValidEmbedField(field, ref name, ref value, ref is_inline))
                    {
                        temp.AddField($"{ZERO_WIDTH_SPACE}{name}", $"{ZERO_WIDTH_SPACE}{value}", is_inline);
                    }
                }
            }

            if(has_color)
            {
                if (d.color is string hex)
                    temp.WithColor(new DiscordColor(hex));
                else if(d.color is int value)
                    temp.WithColor(new DiscordColor(value));
                else if(d.color is int[] ivec && ivec.Length >= 3)
                {
                    var r = ivec[0];
                    var g = ivec[1];
                    var b = ivec[2];
                    temp.WithColor(new DiscordColor(r, g, b));
                }
                else if(d.color is float[] fvec && fvec.Length >= 3)
                {
                    var r = fvec[0];
                    var g = fvec[1];
                    var b = fvec[2];
                    temp.WithColor(new DiscordColor(r, g, b));
                }
            }

            if(has_timestamp)
            {
                if (d.timestamp is DateTime dt)
                    temp.WithTimestamp(dt);
                else if(d.timestamp is DateTimeOffset dto)
                    temp.WithTimestamp(dto);
                else if (d.timestamp is ulong unix)
                    temp.WithTimestamp(unix);
            }

            if(has_description)
            {
                temp.WithDescription($"{ZERO_WIDTH_SPACE}{Convert.ToString(d.description)}");
            }

            return temp;
        }

        static bool Dynamic_IsValidEmbedField(dynamic field, ref string name, ref string value, ref bool inline)
        {
            var state = !(field is null) && !(field.name is null) && !(field.value is null);

            if (state)
            {
                name = Convert.ToString(field.name);
                value = Convert.ToString(field.value);

                try
                {
                    inline = field.inline;
                }
                catch
                {
                    inline = false;
                }
            }

            return state;
        }

        public static async Task<DiscordMessage> DynamicRespondAsync(this CommandContext ctx, string content = default, dynamic embed = default)
        {
            return await ctx.RespondAsync(content, false, CreateNewDynamicEmbed(embed));
        }
    }
}