using System;
using System.Globalization;
using System.Numerics;
using System.Text;
using Dalamud.Game.ClientState.Objects.Types;
using Dalamud.Game.Text.SeStringHandling;
using HSUI.Config;
using HSUI.Interface.Bars;
using FFXIVClientStructs.FFXIV.Client.System.String;
using static System.Globalization.CultureInfo;

namespace HSUI
{
    public static class Extensions
    {
        public static string Abbreviate(this string str)
        {
            if (str.Length > 20) {
                string[] splits = str.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                for (int i = 0; i < splits.Length - 1; i++)
                {
                    splits[i] = splits[i][0].ToString();
                }
                
                return string.Join(". ", splits).ToString();
            }

            return str;
        }

        public static string FirstName(this string str)
        {
            string[] splits = str.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
            return splits.Length > 0 ? splits[0] : "";
        }

        public static string LastName(this string str)
        {
            string[] splits = str.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
            return splits.Length > 1 ? splits[^1] : "";
        }

        public static string Initials(this string str)
        {
            var initials = "";
            var firstName = FirstName(str);
            var lastName = LastName(str);

            if (firstName.Length > 0)
            {
                initials = firstName[0] + ".";
            }

            if (lastName.Length > 0)
            {
                initials += " " + lastName[0] + ".";
            }

            return initials;
        }

        public static string Truncated(this string str, int length = 0)
        {
            return length > 0 ? str.Substring(0, Math.Min(str.Length, length)) : str;
        }

        public static Vector4 AdjustColor(this Vector4 vec, float correctionFactor)
        {
            float red = vec.X;
            float green = vec.Y;
            float blue = vec.Z;

            if (correctionFactor < 0)
            {
                correctionFactor = 1 + correctionFactor;
                red *= correctionFactor;
                green *= correctionFactor;
                blue *= correctionFactor;
            }
            else
            {
                red = (1 - red) * correctionFactor + red;
                green = (1 - green) * correctionFactor + green;
                blue = (1 - blue) * correctionFactor + blue;
            }

            return new Vector4(red, green, blue, vec.W);
        }

        public static Vector4 WithNewAlpha(this Vector4 vec, float alpha)
        {
            return new Vector4(vec.X, vec.Y, vec.Z, alpha);
        }

        public static string KiloFormat(this uint num)
        {
            return num switch
            {
                >= 100000000 => (num / 1000000.0).ToString("#,0M", ConfigurationManager.Instance.ActiveCultreInfo),
                >= 1000000 => (num / 1000000.0).ToString("0.0", ConfigurationManager.Instance.ActiveCultreInfo) + "M",
                >= 100000 => (num / 1000.0).ToString("#,0K", ConfigurationManager.Instance.ActiveCultreInfo),
                >= 10000 => (num / 1000.0).ToString("0.0", ConfigurationManager.Instance.ActiveCultreInfo) + "K",
                _ => num.ToString("#,0", ConfigurationManager.Instance.ActiveCultreInfo)
            };
        }

        public static bool IsHorizontal(this BarDirection direction)
        {
            return direction == BarDirection.Right || direction == BarDirection.Left;
        }

        public static bool IsInverted(this BarDirection direction)
        {
            return direction == BarDirection.Left || direction == BarDirection.Up;
        }

        public static void Draw(this BarHud[] bars, Vector2 origin)
        {
            foreach (BarHud bar in bars)
            {
                bar.Draw(origin);
            }
        }

        public static string CheckForUpperCase(this string str)
        {
            var culture = CurrentCulture.TextInfo;
            if (!string.IsNullOrEmpty(str) && char.IsLetter(str[0]) && !char.IsUpper(str[0]))
            {
                str = culture.ToTitleCase(str);
            }

            return str;
        }

        public static string Repeat(this string s, int n)
            => new StringBuilder(s.Length * n).Insert(0, s, n).ToString();
    }
}