/*
 *                     GNU AFFERO GENERAL PUBLIC LICENSE
 *                       Version 3, 19 November 2007
 *  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 *  Everyone is permitted to copy and distribute verbatim copies
 *  of this license document, but changing it is not allowed.
 */

using System;
using System.Diagnostics;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using UVtools.Core.FileFormats;
using UVtools.Core.Objects;

namespace UVtools.Core.Objects
{
    public class MappedProcess : BindableBase
    {
        #region Constants

        public const string DefaultArgument = "\"{0}\"";
        #endregion

        #region Members

        private bool _isEnabled = true;
        private string _applicationPath;
        private string _name;
        private string _arguments = DefaultArgument;
        private string _compatibleExtensions;
        private bool _waitForExit;

        #endregion

        #region Properties

        /// <summary>
        /// Gets or sets if this device is enabled
        /// </summary>
        public bool IsEnabled
        {
            get => _isEnabled;
            set => RaiseAndSetIfChanged(ref _isEnabled, value);
        }

        /// <summary>
        /// Gets or sets the full path for the application
        /// </summary>
        public string ApplicationPath
        {
            get => _applicationPath;
            set => RaiseAndSetIfChanged(ref _applicationPath, value);
        }

        /// <summary>
        /// Gets or sets the path name alias
        /// </summary>
        public string Name
        {
            get => _name;
            set => RaiseAndSetIfChanged(ref _name, value);
        }

        /// <summary>
        /// Gets or sets the arguments for the application
        /// </summary>
        public string Arguments
        {
            get => _arguments;
            set => RaiseAndSetIfChanged(ref _arguments, value);
        }

        /// <summary>
        /// Gets or sets the compatible extensions with this device.
        /// Empty or null to be compatible with everything
        /// </summary>
        public string CompatibleExtensions
        {
            get => _compatibleExtensions;
            set => RaiseAndSetIfChanged(ref _compatibleExtensions, value);
        }

        public bool WaitForExit
        {
            get => _waitForExit;
            set => RaiseAndSetIfChanged(ref _waitForExit, value);
        }

        #endregion

        #region Contructors

        public MappedProcess() { }

        public MappedProcess(bool isEnabled, string applicationPath, string name = null, string arguments = DefaultArgument)
        {
            _isEnabled = isEnabled;
            _applicationPath = applicationPath;
            if (string.IsNullOrWhiteSpace(name))
            {
                name = Path.GetFileNameWithoutExtension(applicationPath);
            }
            _name = name;

            if (string.IsNullOrWhiteSpace(arguments))
            {
                arguments = DefaultArgument;
            }

            _arguments = arguments;
        }

        public MappedProcess(string applicationPath, string name = null, string arguments = DefaultArgument) : this(true, applicationPath, name, arguments)
        { }

        #endregion

        #region Methods

        public bool IsValid()
        {
            return File.Exists(_applicationPath);
        }

        public async Task StartProcess(FileFormat slicerFile, CancellationToken cancellationToken = default)
        {
            await StartProcess(slicerFile.FileFullPath, cancellationToken);
        }

        public async Task StartProcess(string slicerFile, CancellationToken cancellationToken = default)
        {
            var arguments = string.IsNullOrWhiteSpace(_arguments) ? $"\"{slicerFile}\"" : string.Format(_arguments, slicerFile);
            using var process = Process.Start(_applicationPath, arguments);
            if (process is null) return;
            if (_waitForExit)
            {
                await process.WaitForExitAsync(cancellationToken);
            }
        }

        public override string ToString()
        {
            return $"{_applicationPath} {Arguments}";
        }

        protected bool Equals(MappedProcess other)
        {
            return _applicationPath == other._applicationPath && _name == other._name && _arguments == other._arguments && _compatibleExtensions == other._compatibleExtensions;
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            if (obj.GetType() != this.GetType()) return false;
            return Equals((MappedProcess)obj);
        }

        public override int GetHashCode()
        {
            return HashCode.Combine(_applicationPath, _name, _arguments, _compatibleExtensions);
        }

        public MappedProcess Clone()
        {
            return MemberwiseClone() as MappedProcess;
        }

        #endregion
    }
}