using System.Collections.Concurrent;
using System.Diagnostics;

namespace etoy
{
    class ConfigurePileline
    {
        ConcurrentQueue<Command> _commands;

        ConcurrentQueue<Command> _completeds;

        Thread _thread;

        int _total;

        Stopwatch _cmdStopwatch;

        int _top;

        public ConfigurePileline(IEnumerable<Command> commands)
        {
            _commands = new ConcurrentQueue<Command>(commands);

            _total = _commands.Count;

            _completeds = new ConcurrentQueue<Command>();

            _cmdStopwatch = new Stopwatch();

            InitThread();
        }


        public void Run()
        {
            _thread.Start();
        }

        void InitThread()
        {
            _thread = new Thread(OnRunThread);
        }


        void ProgressBar(ICommand cmd)
        {
            Console.SetCursorPosition(0, _top);
            Console.Write(new string(' ', Console.WindowWidth));
            Console.SetCursorPosition(0, _top);

            var str1 = new string('#', (int)(50 * cmd.Progress));
            var str2 = new string(' ', 50 - (int)(50 * cmd.Progress));
            float progress = 100 * (cmd.Progress > 0.999f ? 1 : cmd.Progress);
            string cost = $"耗时:{_cmdStopwatch.ElapsedMilliseconds}ms";
            Console.ForegroundColor = ConsoleColor.Blue;
            Console.Write(string.Format(">> [{0}{1}] {2:f2}% {3}", str1, str2, progress, cost));
            Console.ForegroundColor = ConsoleColor.White;
        }



        void OnRunThread(object obj)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            bool success = true;

            Console.WriteLine(">> 开始执行");
            Console.WriteLine();
            while (_commands.TryPeek(out var command))
            {
                if (command is ICommand cmd)
                {
                    _top = Console.CursorTop;

                    if (cmd.Done)
                    {
                        _cmdStopwatch.Stop();

                        ProgressBar(cmd);

                        Console.WriteLine();

                        if (_commands.TryDequeue(out var completedCommand))
                            _completeds.Enqueue(completedCommand);
                    }
                    else
                    {
                        try
                        {
                            if (!cmd.Start)
                            {
                                Console.WriteLine($">> 步骤 ({_completeds.Count + 1}/{_total}) [{command.Description}]");
                                _cmdStopwatch.Restart();
                                cmd.Execute();
                            }
                            else
                            {
                                if (cmd.Exception != null)
                                    throw cmd.Exception;

                                ProgressBar(cmd);
                            }
                        }
                        catch (Exception e)
                        {
                            Console.ForegroundColor = ConsoleColor.Red;
                            Console.WriteLine();
                            Console.WriteLine($"## CMD异常 Type:{cmd.GetType()}\nMessage:{e.Message}");
                            Console.ForegroundColor = ConsoleColor.White;
                            success = false;
                            break;
                        }
                    }
                }
                Thread.Sleep(5);
            }
            sw.Stop();

            Console.WriteLine();
            if (success)
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine($">> 执行成功. 总耗时: {sw.ElapsedMilliseconds} ms");
                Console.ForegroundColor = ConsoleColor.White;
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine($">> 执行失败. ");
                Console.ForegroundColor = ConsoleColor.White;
                //输入enter键才关闭控制台
                Console.ReadLine();
            }
        }
    }
}