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

namespace SourceGit.ViewModels {
    public class EditRemote : Popup {
        [Required(ErrorMessage = "Remote name is required!!!")]
        [RegularExpression(@"^[\w\-\.]+$", ErrorMessage = "Bad remote name format!!!")]
        [CustomValidation(typeof(EditRemote), nameof(ValidateRemoteName))]
        public string Name {
            get => _name;
            set => SetProperty(ref _name, value, true);
        }

        [Required(ErrorMessage = "Remote URL is required!!!")]
        [CustomValidation(typeof(EditRemote), nameof(ValidateRemoteURL))]
        public string Url {
            get => _url;
            set {
                if (SetProperty(ref _url, value, true)) UseSSH = Models.Remote.IsSSH(value);
            }
        }

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

        public string SSHKey {
            get;
            set;
        }

        public EditRemote(Repository repo, Models.Remote remote) {
            _repo = repo;
            _remote = remote;
            _name = remote.Name;
            _url = remote.URL;
            _useSSH = Models.Remote.IsSSH(remote.URL);

            if (_useSSH) {
                SSHKey = new Commands.Config(repo.FullPath).Get($"remote.{remote.Name}.sshkey");
            }

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

        public static ValidationResult ValidateRemoteName(string name, ValidationContext ctx) {
            if (ctx.ObjectInstance is EditRemote edit) {
                foreach (var remote in edit._repo.Remotes) {
                    if (remote != edit._remote && name == remote.Name) new ValidationResult("A remote with given name already exists!!!");
                }
            }

            return ValidationResult.Success;
        }

        public static ValidationResult ValidateRemoteURL(string url, ValidationContext ctx) {
            if (ctx.ObjectInstance is EditRemote edit) {
                if (!Models.Remote.IsValidURL(url)) return new ValidationResult("Bad remote URL format!!!");

                foreach (var remote in edit._repo.Remotes) {
                    if (remote != edit._remote && url == remote.URL) new ValidationResult("A remote with the same url already exists!!!");
                }
            }

            return ValidationResult.Success;
        }

        public override Task<bool> Sure() {
            _repo.SetWatcherEnabled(false);
            ProgressDescription = $"Editing remote '{_remote.Name}' ...";

            return Task.Run(() => {
                if (_remote.Name != _name) {
                    var succ = new Commands.Remote(_repo.FullPath).Rename(_remote.Name, _name);
                    if (succ) _remote.Name = _name;
                }

                if (_remote.URL != _url) {
                    var succ = new Commands.Remote(_repo.FullPath).SetURL(_name, _url);
                    if (succ) _remote.URL = _url;
                }

                if (_useSSH) {
                    SetProgressDescription("Post processing ...");
                    new Commands.Config(_repo.FullPath).Set($"remote.{_name}.sshkey", SSHKey);
                }

                CallUIThread(() => _repo.SetWatcherEnabled(true));
                return true;
            });
        }

        private Repository _repo = null;
        private Models.Remote _remote = null;
        private string _name = string.Empty;
        private string _url = string.Empty;
        private bool _useSSH = false;
    }
}