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

namespace SourceGit.ViewModels {
    public class InitGitFlow : Popup {
        private static readonly Regex TAG_PREFIX = new Regex(@"^[\w\-/\.]+$");

        [Required(ErrorMessage = "Master branch name is required!!!")]
        [RegularExpression(@"^[\w\-/\.]+$", ErrorMessage = "Bad branch name format!")]
        [CustomValidation(typeof(InitGitFlow), nameof(ValidateBaseBranch))]
        public string Master {
            get => _master;
            set => SetProperty(ref _master, value, true);
        }

        [Required(ErrorMessage = "Develop branch name is required!!!")]
        [RegularExpression(@"^[\w\-/\.]+$", ErrorMessage = "Bad branch name format!")]
        [CustomValidation(typeof(InitGitFlow), nameof(ValidateBaseBranch))]
        public string Develop {
            get => _develop;
            set => SetProperty(ref _develop, value, true);
        }

        [Required(ErrorMessage = "Feature prefix is required!!!")]
        [RegularExpression(@"^[\w\-\.]+/$", ErrorMessage = "Bad feature prefix format!")]
        public string FeturePrefix {
            get => _featurePrefix;
            set => SetProperty(ref _featurePrefix, value, true);
        }

        [Required(ErrorMessage = "Release prefix is required!!!")]
        [RegularExpression(@"^[\w\-\.]+/$", ErrorMessage = "Bad release prefix format!")]
        public string ReleasePrefix {
            get => _releasePrefix;
            set => SetProperty(ref _releasePrefix, value, true);
        }

        [Required(ErrorMessage = "Hotfix prefix is required!!!")]
        [RegularExpression(@"^[\w\-\.]+/$", ErrorMessage = "Bad hotfix prefix format!")]
        public string HotfixPrefix {
            get => _hotfixPrefix;
            set => SetProperty(ref _hotfixPrefix, value, true);
        }

        [CustomValidation(typeof(InitGitFlow), nameof(ValidateTagPrefix))]
        public string TagPrefix {
            get => _tagPrefix;
            set => SetProperty(ref _tagPrefix, value, true);
        }

        public InitGitFlow(Repository repo) {
            _repo = repo;
            View = new Views.InitGitFlow() { DataContext = this };
        }

        public static ValidationResult ValidateBaseBranch(string _, ValidationContext ctx) {
            if (ctx.ObjectInstance is InitGitFlow initializer) {
                if (initializer._master == initializer._develop) return new ValidationResult("Develop branch has the same name with master branch!");
            }

            return ValidationResult.Success;
        }

        public static ValidationResult ValidateTagPrefix(string tagPrefix, ValidationContext ctx) {
            if (!string.IsNullOrWhiteSpace(tagPrefix) && !TAG_PREFIX.IsMatch(tagPrefix)) {
                return new ValidationResult("Bad tag prefix format!");
            }

            return ValidationResult.Success;
        }

        public override Task<bool> Sure() {
            _repo.SetWatcherEnabled(false);
            return Task.Run(() => {
                var succ = new Commands.GitFlow(_repo.FullPath).Init(_repo.Branches, _master, _develop, _featurePrefix, _releasePrefix, _hotfixPrefix, _tagPrefix);
                if (succ) {
                    _repo.GitFlow.Feature = _featurePrefix;
                    _repo.GitFlow.Release = _releasePrefix;
                    _repo.GitFlow.Hotfix = _hotfixPrefix;
                }

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

        private Repository _repo = null;
        private string _master = "master";
        private string _develop = "develop";
        private string _featurePrefix = "feature/";
        private string _releasePrefix = "release/";
        private string _hotfixPrefix = "hotfix/";
        private string _tagPrefix = string.Empty;
    }
}