using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace DTS.Common.Controls
{
    public class TestIDViewModel : INotifyPropertyChanged
    {
        #region INotifyPropertyChanged

        public event PropertyChangedEventHandler PropertyChanged;

        protected bool SetProperty<T>(ref T storage, T value, string propertyName = null)
        {
            if (Equals(storage, value)) return false;

            storage = value;
            OnPropertyChanged(propertyName);
            return true;
        }

        protected void OnPropertyChanged(string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        #endregion

        private static readonly TestIdPreFixSuffixHelper TEST_ID_SUFFIX_VALUE_NONE_ITEM =
            new TestIdPreFixSuffixHelper(TestIdFixedPrefixSuffixValues.None);

        private static readonly TestIdPreFixSuffixHelper TEST_ID_SUFFIX_VALUE_TIME_STAMP_ITEM =
            new TestIdPreFixSuffixHelper(TestIdFixedPrefixSuffixValues.TimeStamp);

        private static readonly TestIdPreFixSuffixHelper TEST_ID_SUFFIX_VALUE_TEST_SETUP_ITEM =
            new TestIdPreFixSuffixHelper(TestIdFixedPrefixSuffixValues.TestSetupName);


        private string _testSetupLabel = string.Empty;
        public string TestSetupLabel
        {
            get => _testSetupLabel;
            set
            {
                _testSetupLabel = value;
                OnPropertyChanged("TestSetupLabel");
                OnPropertyChanged("TestSetupLabelVisibility");
            }
        }

        public Visibility TestSetupLabelVisibility => string.IsNullOrEmpty(TestSetupLabel)
            ? Visibility.Collapsed
            : Visibility.Visible;

        public string TestIdEditableText { get; set; } = string.Empty;

        public void PopulateAllTestIdPrefixSuffixValues(string[] serializedValues)
        {
            _allTestIdPrefixSuffixValues = new List<TestIdPreFixSuffixHelper>
            {
                TEST_ID_SUFFIX_VALUE_NONE_ITEM,
                TEST_ID_SUFFIX_VALUE_TIME_STAMP_ITEM,
                TEST_ID_SUFFIX_VALUE_TEST_SETUP_ITEM
            };

            // Second, populate all values from the db
            var dbList = new List<string>();
            dbList.AddRange(serializedValues);
            foreach (var s in dbList)
            {
                _allTestIdPrefixSuffixValues.Add(new TestIdPreFixSuffixHelper(s));
            }
            OnPropertyChanged("AllTestIDPrefixSuffixValues");
        }

        private List<TestIdPreFixSuffixHelper> _allTestIdPrefixSuffixValues;
        public TestIdPreFixSuffixHelper[] AllTestIdPrefixSuffixValues => _allTestIdPrefixSuffixValues?.ToArray() ?? new TestIdPreFixSuffixHelper[0];

        public TestIdPreFixSuffixHelper SelectedTestIdPrefixValueItem { get; set; } = TEST_ID_SUFFIX_VALUE_NONE_ITEM;

        public TestIdPreFixSuffixHelper SelectedTestIdSuffixValueItem { get; set; } = TEST_ID_SUFFIX_VALUE_TIME_STAMP_ITEM;

        public string TestName
        {
            get; set;
        }
        public string GetTestId()
        {
            var testIdList = new List<string>();
            var prefix = GetRunTimeTestIdPrefixOrSuffix(SelectedTestIdPrefixValueItem);
            if (prefix != string.Empty)
            {
                testIdList.Add(prefix);
            }
            if (!string.IsNullOrEmpty(TestSetupLabel))
            {
                testIdList.Add(TestSetupLabel);
            }
            if (TestIdEditableText != string.Empty)
            {
                testIdList.Add(TestIdEditableText);
            }
            var suffix = GetRunTimeTestIdPrefixOrSuffix(SelectedTestIdSuffixValueItem);
            if (suffix != string.Empty)
            {
                testIdList.Add(suffix);
            }

            return string.Join("_", testIdList);
        }
        private string GetRunTimeTestIdPrefixOrSuffix(TestIdPreFixSuffixHelper prefixOrSuffix)
        {
            var rv = string.Empty;
            if (prefixOrSuffix == null) { return rv; }
            switch (prefixOrSuffix.TestIdPreFixSuffix.FixedValue)
            {
                case TestIdFixedPrefixSuffixValues.TestSetupName:
                    rv = TestName;
                    break;
                case TestIdFixedPrefixSuffixValues.TimeStamp:
                    rv = GetTestIdTimestamp();
                    break;
                case TestIdFixedPrefixSuffixValues.NotFixed:
                    rv = prefixOrSuffix.TestIdPreFixSuffix.ToString();
                    break;
                case TestIdFixedPrefixSuffixValues.None:
                default:
                    // do nothing
                    break;
            }
            return rv;
        }
        public string GetTestIdTimestamp()
        {
            return $"{DateTime.Now.Year:0000}_{DateTime.Now.Month:00}_{DateTime.Now.Day:00} {DateTime.Now.Hour:00}_{DateTime.Now.Minute:00}";
        }
    }
}