using System;
using System.IO;
using System.Text;
using System.Reflection;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace Duck
{
    /// <summary>
    /// Provides logging, file, environment and minor string manipulation actions.
    /// </summary>
    public static class IO
    {
        #region DLL Imports
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
        #endregion

        #region Logging
        /// <summary>
        /// Enum with flags for log importancies. If 'minimumImportance' flag is higher than the action to be logged, then the action won't be logged.
        /// </summary>
        public enum logFlags { importantAction = 3, standardAction = 2, belowStandardAction = 1, mehAction = 0 }
        /// <summary>
        /// Flag for minimum importance in logs. Adjust this to don't print less important logs.
        /// </summary>
        public static logFlags minimumImportance;
        /// <summary>
        /// Prints a cyan line of log, together with timestamp and method name.
        /// </summary>
        /// <param name="logText">The log line to be printed.</param>
        public static void WriteLine(string logText)
        {
            DateTime _DTN = DateTime.Now;
            StackFrame _SF = new StackTrace().GetFrame(1);
            Console.Write("[" + _DTN.ToLongTimeString() + ":" + _DTN.Millisecond.ToString() + "] [");
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.Write(_SF.GetMethod().ReflectedType.Name + "." + _SF.GetMethod().Name);
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.Write("] » ");
            Console.ForegroundColor = ConsoleColor.DarkCyan;
            Console.WriteLine(logText);
            Console.ForegroundColor = ConsoleColor.Gray;
        }
        /// <summary>
        /// Prints a cyan line of log, together with timestamp and method name.
        /// </summary>
        /// <param name="logText">The log line to be printed.</param>
        /// <param name="logFlag">The importance flag of this log line.</param>
        public static void WriteLine(string logText, logFlags logFlag)
        {
            if ((int)logFlag < (int)minimumImportance)
                return;

            DateTime _DTN = DateTime.Now;
            StackFrame _SF = new StackTrace().GetFrame(1);
            Console.Write("[" + _DTN.ToLongTimeString() + ":" + _DTN.Millisecond.ToString() + "] [");
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.Write(_SF.GetMethod().ReflectedType.Name + "." + _SF.GetMethod().Name);
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.Write("] » ");
            Console.ForegroundColor = ConsoleColor.DarkCyan;
            Console.WriteLine(logText);
            Console.ForegroundColor = ConsoleColor.Gray;
        }
        /// <summary>
        /// Prints a customizeable line of log, together with timestamp and method name.
        /// </summary>
        /// <param name="logText">The log line to be printed.</param>
        /// <param name="logFlag">The importance flag of this log line.</param>
        /// <param name="colorOne">The color to use on the left.</param>
        /// <param name="colorTwo">The color to use on the right.</param>
        public static void WriteLine(string logText, logFlags logFlag, ConsoleColor colorOne, ConsoleColor colorTwo)
        {
            if ((int)logFlag < (int)minimumImportance)
                return;

            DateTime _DTN = DateTime.Now;
            StackFrame _SF = new StackTrace().GetFrame(1);
            Console.Write("[" + _DTN.ToLongTimeString() + ":" + _DTN.Millisecond.ToString() + "] [");
            Console.ForegroundColor = colorOne;
            Console.Write(_SF.GetMethod().ReflectedType.Name + "." + _SF.GetMethod().Name);
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.Write("] » ");
            Console.ForegroundColor = colorTwo;
            Console.WriteLine(logText);
            Console.ForegroundColor = ConsoleColor.Gray;
        }
        /// <summary>
        /// Prints a red, error line of log, together with timestamp and method name.
        /// </summary>
        /// <param name="logText">The log line to be printed.</param>
        public static void WriteError(string logText)
        {
            DateTime _DTN = DateTime.Now;
            StackFrame _SF = new StackTrace().GetFrame(1);

            Console.Write("[" + _DTN.ToLongTimeString() + ":" + _DTN.Millisecond.ToString() + "] [");
            Console.ForegroundColor = ConsoleColor.Red;
            Console.Write(_SF.GetMethod().ReflectedType.Name + "." + _SF.GetMethod().Name);
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.Write("] » ");
            Console.ForegroundColor = ConsoleColor.DarkRed;
            Console.WriteLine(logText);
            Console.ForegroundColor = ConsoleColor.Gray;
        }
        /// <summary>
        /// Prints a red,error line of log, together with timestamp and method name.
        /// </summary>
        /// <param name="logText">The log line to be printed.</param>
        /// <param name="logFlag">The importance flag of this error.</param>
        public static void WriteError(string logText, logFlags logFlag)
        {
            if ((int)logFlag < (int)minimumImportance)
                return;

            DateTime _DTN = DateTime.Now;
            StackFrame _SF = new StackTrace().GetFrame(1);

            Console.Write("[" + _DTN.ToLongTimeString() + ":" + _DTN.Millisecond.ToString() + "] [");
            Console.ForegroundColor = ConsoleColor.Red;
            Console.Write(_SF.GetMethod().ReflectedType.Name + "." + _SF.GetMethod().Name);
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.Write("] » ");
            Console.ForegroundColor = ConsoleColor.DarkRed;
            Console.WriteLine(logText);
            Console.ForegroundColor = ConsoleColor.Gray;
        }
        /// <summary>
        /// Writes a special line of log, with customizeable colors and header coloring of logText.
        /// </summary>
        /// <param name="logText">The log line to be printed.</param>
        /// <param name="logFlag">The importance flag of this log line.</param>
        /// <param name="colorOne">The color to use on the left.</param>
        /// <param name="colorTwo">The color to use on the right.</param>
        /// <param name="headerHead">The string to use infront of logText.</param>
        /// <param name="headerLength">The length of the header to color.</param>
        /// <param name="headerColor">The color for the header in the logText.</param>
        public static void WriteSpecialLine(string logText, logFlags logFlag, ConsoleColor colorOne, ConsoleColor colorTwo, string headerHead, int headerLength, ConsoleColor headerColor)
        {
            //if ((int)logFlag < (int)minimumImportance)
            //return;

            DateTime _DTN = DateTime.Now;
            StackFrame _SF = new StackTrace().GetFrame(1);
            Console.Write("[" + _DTN.ToLongTimeString() + ":" + _DTN.Millisecond.ToString() + "] [");
            Console.ForegroundColor = colorOne;
            Console.Write(_SF.GetMethod().ReflectedType.Name + "." + _SF.GetMethod().Name);
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.Write("] " + headerHead + " ");
            Console.ForegroundColor = headerColor;
            Console.Write(logText.Substring(0, headerLength));
            Console.ForegroundColor = colorTwo;
            Console.WriteLine(logText.Substring(headerLength));
            Console.ForegroundColor = ConsoleColor.Gray;
        }
        /// <summary>
        /// Writes a plain text line.
        /// </summary>
        /// <param name="logText">The log line to be printed.</param>
        public static void WritePlain(string logText)
        {
            Console.WriteLine(logText);
        }
        /// <summary>
        /// Writes a blank line.
        /// </summary>
        public static void WriteBlank()
        {
            Console.WriteLine();
        }
        #endregion

        #region Filesystem
        /// <summary>
        /// Returns the directory of the executeable (without backslash at end) as a string.
        /// </summary>
        public static string workingDirectory
        {
            get
            {
                return Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase).Substring(6);
            }
        }
        /// <summary>
        /// Returns the value of a private profile string in a textfile as a string.
        /// </summary>
        /// <param name="iniSection">The section where the value is located in.</param>
        /// <param name="iniKey">The key of the value.</param>
        /// <param name="iniLocation">The location of the textfile.</param>
        public static string readINI(string iniSection, string iniKey, string iniLocation)
        {
            StringBuilder _TMP = new StringBuilder(255);
            try
            {
                int i = GetPrivateProfileString(iniSection, iniKey, "", _TMP, 255, iniLocation);
                return _TMP.ToString();
            }
            catch
            {
                return "";
            }
        }
        /// <summary>
        /// Updates a value of a key in a textfile using WritePrivateProfileString.
        /// </summary>
        /// <param name="iniSection">The section where the key to update is located in.</param>
        /// <param name="iniKey">The key to update.</param>
        /// <param name="iniValue">The new value for the key.</param>
        /// <param name="iniLocation">The location of the textfile.</param>
        public static void writeINI(string iniSection, string iniKey, string iniValue, string iniLocation)
        {
            WritePrivateProfileString(iniSection, iniKey, iniValue, iniLocation);
        }
        /// <summary>
        /// Returns a bool, which indicates if the specified path leads to a file.
        /// </summary>
        /// <param name="fileLocation">The full location of the file.</param>
        public static bool fileExists(string fileLocation)
        {
            return File.Exists(fileLocation);
        }
        #endregion
    }
}