using System;
using System.IO;
using System.Runtime.InteropServices;

namespace ClassLibrary1
{
    static class ConsoleShow
    {
        static bool bFlag = false;
        public static void Log(string str)
        {
            if (!bFlag)
            {
                bFlag = true;
                AllocConsole();
                // stdout's handle seems to always be equal to 7 
                IntPtr defaultStdout = new IntPtr(7);
                IntPtr currentStdout = GetStdHandle(StdOutputHandle);

                if (currentStdout != defaultStdout)
                    // reset stdout 
                    SetStdHandle(StdOutputHandle, defaultStdout);

                // reopen stdout 
                TextWriter writer = new StreamWriter(Console.OpenStandardOutput())
                { AutoFlush = true };
                Console.SetOut(writer);
            }
            WriteLine(str);

            FileLog.Log(str);
        }
        /// <summary>
        /// 启动控制台
        /// </summary>
        /// <returns></returns>
        [DllImport("kernel32.dll")]
        public static extern bool AllocConsole();

        /// <summary>
        /// 释放控制台
        /// </summary>
        /// <returns></returns>
        [DllImport("kernel32.dll")]
        public static extern bool FreeConsole();

        // P/Invoke required: 
        private const UInt32 StdOutputHandle = 0xFFFFFFF5;
        [DllImport("kernel32.dll")]
        private static extern IntPtr GetStdHandle(UInt32 nStdHandle);
        [DllImport("kernel32.dll")]
        private static extern void SetStdHandle(UInt32 nStdHandle, IntPtr handle);


        /// <summary>  
        /// 输出信息  
        /// </summary>  
        /// <param name="format"></param>  
        /// <param name="args"></param>  
        public static void WriteLine(string format, params object[] args)
        {
            WriteLine(string.Format(format, args));
        }

        /// <summary>  
        /// 输出信息  
        /// </summary>  
        /// <param name="output"></param>  
        public static void WriteLine(string output)
        {
            Console.ForegroundColor = GetConsoleColor(output);
            Console.WriteLine(@"[{0}]{1}", DateTimeOffset.Now, output);
        }

        /// <summary>  
        /// 根据输出文本选择控制台文字颜色  
        /// </summary>  
        /// <param name="output"></param>  
        /// <returns></returns>  
        private static ConsoleColor GetConsoleColor(string output)
        {
            if (output.StartsWith("警告")) return ConsoleColor.Yellow;
            if (output.StartsWith("错误")) return ConsoleColor.Red;
            if (output.StartsWith("注意")) return ConsoleColor.Green;
            return ConsoleColor.Gray;
        }
    }
}