using System;
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() {
            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 = new RepositoryNode() {
                        Id = path,
                        Name = Path.GetFileName(path),
                        Bookmark = 0,
                        IsRepository = true,
                    };
                    Preference.AddNode(node);

                    _launcher.OpenRepositoryInTab(node, _page);
                });

                return true;
            });
        }

        private Launcher _launcher = null;
        private 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;
    }
}