using System.ComponentModel.DataAnnotations;
using System.IO;
using System.Threading.Tasks;

namespace SourceGit.ViewModels
{
    public class Clone : Popup
    {
        [Required(ErrorMessage = "Remote URL is required")]
        [CustomValidation(typeof(Clone), nameof(ValidateRemote))]
        public string Remote
        {
            get => _remote;
            set
            {
                if (SetProperty(ref _remote, value, true))
                    UseSSH = Models.Remote.IsSSH(value);
            }
        }

        public bool UseSSH
        {
            get => _useSSH;
            set => SetProperty(ref _useSSH, value);
        }

        public string SSHKey
        {
            get => _sshKey;
            set => SetProperty(ref _sshKey, value);
        }

        [Required(ErrorMessage = "Parent folder is required")]
        [CustomValidation(typeof(Clone), nameof(ValidateParentFolder))]
        public string ParentFolder
        {
            get => _parentFolder;
            set => SetProperty(ref _parentFolder, value, true);
        }

        public string Local
        {
            get => _local;
            set => SetProperty(ref _local, value);
        }

        public string ExtraArgs
        {
            get => _extraArgs;
            set => SetProperty(ref _extraArgs, value);
        }

        public Clone(Launcher launcher, LauncherPage page)
        {
            _launcher = launcher;
            _page = page;

            View = new Views.Clone() { DataContext = this };
        }

        public static ValidationResult ValidateRemote(string remote, ValidationContext _)
        {
            if (!Models.Remote.IsValidURL(remote))
                return new ValidationResult("Invalid remote repository URL format");
            return ValidationResult.Success;
        }

        public static ValidationResult ValidateParentFolder(string folder, ValidationContext _)
        {
            if (!Directory.Exists(folder))
                return new ValidationResult("Given path can NOT be found");
            return ValidationResult.Success;
        }

        public override Task<bool> Sure()
        {
            ProgressDescription = "Clone ...";

            return Task.Run(() =>
            {
                var cmd = new Commands.Clone(HostPageId, _parentFolder, _remote, _local, _useSSH ? _sshKey : "", _extraArgs, SetProgressDescription);
                if (!cmd.Exec())
                    return false;

                var path = _parentFolder;
                if (!string.IsNullOrEmpty(_local))
                {
                    path = Path.GetFullPath(Path.Combine(path, _local));
                }
                else
                {
                    var name = Path.GetFileName(_remote);
                    if (name.EndsWith(".git"))
                        name = name.Substring(0, name.Length - 4);
                    path = Path.GetFullPath(Path.Combine(path, name));
                }

                if (!Directory.Exists(path))
                {
                    CallUIThread(() =>
                    {
                        App.RaiseException(HostPageId, $"Folder '{path}' can NOT be found");
                    });
                    return false;
                }

                if (_useSSH && !string.IsNullOrEmpty(_sshKey))
                {
                    var config = new Commands.Config(path);
                    config.Set("remote.origin.sshkey", _sshKey);
                }

                CallUIThread(() =>
                {
                    var repo = Preference.AddRepository(path, Path.Combine(path, ".git"));
                    var node = Preference.FindOrAddNodeByRepositoryPath(repo.FullPath, null, true);
                    _launcher.OpenRepositoryInTab(node, _page);
                });

                return true;
            });
        }

        private readonly Launcher _launcher = null;
        private readonly LauncherPage _page = null;
        private string _remote = string.Empty;
        private bool _useSSH = false;
        private string _sshKey = string.Empty;
        private string _parentFolder = Preference.Instance.GitDefaultCloneDir;
        private string _local = string.Empty;
        private string _extraArgs = string.Empty;
    }
}
