using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Flowframes
{
    public static class ExtensionMethods
    {
        public static string TrimNumbers(this string s, bool allowDotComma = false)
        {
            if (!allowDotComma)
                s = Regex.Replace(s, "[^0-9]", "");
            else
                s = Regex.Replace(s, "[^.,0-9]", "");
            return s.Trim();
        }

        public static int GetInt(this TextBox textbox)
        {
            return GetInt(textbox.Text);
        }

        public static int GetInt(this ComboBox combobox)
        {
            return GetInt(combobox.Text);
        }

        public static int GetInt(this string str)
        {
            if (str.Length < 1 || str == null)
                return 0;
            try { return int.Parse(str.TrimNumbers()); }
            catch (Exception e)
            {
                Logger.Log("Failed to parse \"" + str + "\" to int: " + e, true);
                return 0;
            }
        }

        public static float GetFloat(this TextBox textbox)
        {
            return GetFloat(textbox.Text);
        }

        public static float GetFloat(this ComboBox combobox)
        {
            return GetFloat(combobox.Text);
        }

        public static float GetFloat(this string str)
        {
            if (str.Length < 1 || str == null)
                return 0f;
            string num = str.TrimNumbers(true).Replace(",", ".");
            float value;
            float.TryParse(num, NumberStyles.Any, CultureInfo.InvariantCulture, out value);
            return value;
        }

        public static string Wrap(this string path, bool addSpaceFront = false, bool addSpaceEnd = false)
        {
            string s = "\"" + path + "\"";
            if (addSpaceFront)
                s = " " + s;
            if (addSpaceEnd)
                s = s + " ";
            return s;
        }

        public static string GetParentDir(this string path)
        {
            return Directory.GetParent(path).FullName;
        }

        public static int RoundToInt(this float f)
        {
            return (int)Math.Round(f);
        }

        public static int Clamp(this int i, int min, int max)
        {
            if (i < min)
                i = min;
            if (i > max)
                i = max;
            return i;
        }

        public static string[] SplitIntoLines(this string str)
        {
            return Regex.Split(str, "\r\n|\r|\n");
        }

        public static string Trunc(this string value, int maxChars, bool addEllipsis = true)
        {
            string str = value.Length <= maxChars ? value : value.Substring(0, maxChars);
            if(addEllipsis)
                str += "…";
            return str;
        }

        public static string StripBadChars(this string str)
        {
            string outStr = Regex.Replace(str, @"[^\u0020-\u007E]", string.Empty);
            outStr = outStr.Replace("(", "").Replace(")", "").Replace("[", "").Replace("]", "").Replace("{", "").Replace("}", "").Replace("%", "");
            return outStr;
        }

        public static string StripNumbers(this string str)
        {
            return new string(str.Where(c => c != '-' && (c < '0' || c > '9')).ToArray());
        }

        public static string Remove(this string str, string stringToRemove)
        {
            if (str == null || stringToRemove == null)
                return str;
            return str.Replace(stringToRemove, "");
        }

        public static string TrimWhitespaces(this string str)
        {
            if (str == null) return str;
            var newString = new StringBuilder();
            bool previousIsWhitespace = false;
            for (int i = 0; i < str.Length; i++)
            {
                if (Char.IsWhiteSpace(str[i]))
                {
                    if (previousIsWhitespace)
                        continue;
                    previousIsWhitespace = true;
                }
                else
                {
                    previousIsWhitespace = false;
                }
                newString.Append(str[i]);
            }
            return newString.ToString();
        }

        public static string ReplaceLast (this string str, string stringToReplace, string replaceWith)
        {
            int place = str.LastIndexOf(stringToReplace);

            if (place == -1)
                return str;

            return str.Remove(place, stringToReplace.Length).Insert(place, replaceWith);
        }
    }
}