using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;

namespace DatabaseImport
{
    public class TestObjectTemplate //: BasePropertyChanged, IComparable<TestObjectTemplate>
    {
        //        #region enums and constants
        public enum Tags
        {
            ChannelCountText,
            PossibleChannelCountText,
            TemplateName,
            TemplateDescription,
            TestObject,
            TestObjectType,
            TemplateAllUIChannels,
            TemplateZones,
            AvailableTestObjectTypes,
            TestObjectIndex,
            TestObjectTypeIndex,
            CurrentZone,
            CurrentZoneIndex,
            AreZoneControlsEnabled,
            TemplateAllChannels,
            RequiredChannels
        }

        public string LastModifiedBy { get; set; } = "N/A";

        public DateTime LastModified { get; set; } = (DateTime)System.Data.SqlTypes.SqlDateTime.MinValue;

        private int _currentZoneIndex = -1;
        public int CurrentZoneIndex
        {
            get => _currentZoneIndex;
            set
            {
                CurrentZone = value >= 0 ? TemplateZones[value] : null;
                _currentZoneIndex = value;
            }
        }

        private Zone _currentZone;
        public Zone CurrentZone
        {
            get => _currentZone;
            set
            {
                //if (null != _currentZone && _currentZone != value) { _currentZone.PropertyChanged -= CurrentZone_PropertyChanged; }
                _currentZone = value;

                //if (null != _currentZone) { _currentZone.PropertyChanged += CurrentZone_PropertyChanged; }
                AreZoneControlsEnabled = null != value;
            }
        }


        public bool AreZoneControlsEnabled { get; set; }

        private ISO.TestObjectTemplate _template;
        public List<TestObjectTemplateChannel> RequiredChannels { get; set; } = new List<TestObjectTemplateChannel>();

        public string TemplateParent { get; set; } = "";

        public bool SysBuilt { get; set; }

        private bool _embedded;
        public bool Embedded
        {
            get => _embedded;
            set
            {
                _embedded = value;
                if (null != _template) { _template.Embedded = value; }
            }
        }

        private string _originalTemplateName = "";
        public string OriginalTemplateName
        {
            get => _originalTemplateName;
            set
            {
                _originalTemplateName = value;
                if (null != _template) { _template.OriginalTemplateName = value; }
            }
        }

        public string TemplateName { get; set; }

        public string TemplateDescription { get; set; }

        public bool IsLocalOnly { get; set; }

        private MMETestObjects _testObject;
        public MMETestObjects TestObject
        {
            get => _testObject;
            set
            {
                _testObject = value;
                if (null == _testObject) return;
                var app = Application.Current as App;
                if (app == null) return;
                AvailableTestObjectTypes = app.IsoDb.GetUniquePossibleChannelTypes(TestObjectTemplateChannel.NONISOCHANNELTYPE);
                if (AvailableTestObjectTypes.Length > 0) { TestObjectTypeIndex = 0; }
                else { TestObjectTypeIndex = -1; }
            }
        }

        private string _testObjectType;
        public string TestObjectType
        {
            get => _testObjectType;
            set
            {
                _testObjectType = value;
                _channels = new List<MMEPossibleChannels>(((App)Application.Current).IsoDb.GetPossibleChannelsForType(_testObjectType));
                TemplateAllChannels = _channels.Select(pc => new TestObjectTemplateChannel(new TestObjectTemplateChannel(pc), /*ref db,*/ _template)).ToArray();
            }
        }

        private List<MMEPossibleChannels> _channels = new List<MMEPossibleChannels>();

        private List<TestObjectTemplateChannel> _allChannels = new List<TestObjectTemplateChannel>();
        public TestObjectTemplateChannel[] TemplateAllChannels
        {
            get { _allChannels.Sort(CompareChannels); return _allChannels.ToArray(); }
            set
            {
                _allChannels = new List<TestObjectTemplateChannel>(value);

                TemplateAllUIChannels = value.Select(c => new TemplateChannelUI(c)).ToArray();
            }
        }
        private List<TemplateChannelUI> _allUIChannels = new List<TemplateChannelUI>();
        public TemplateChannelUI[] TemplateAllUIChannels
        {
            get => _allUIChannels.ToArray();
            set => _allUIChannels = new List<TemplateChannelUI>(value);
        }

        private List<Zone> _zones = new List<Zone>();
        public Zone[] TemplateZones
        {
            get => _zones.ToArray();
            set { _zones = new List<Zone>(value); var j = CurrentZoneIndex; }
        }
        private List<string> _availableTestObjectTypes = null;
        public string[] AvailableTestObjectTypes
        {
            get
            {
                if (null != _availableTestObjectTypes) return _availableTestObjectTypes.ToArray();
                if (null == TestObject) { return new string[0]; }
                _availableTestObjectTypes = new List<string>(((App)Application.Current).IsoDb.GetTestObjectTypeForTestObject(TestObject.Test_Object));
                return _availableTestObjectTypes.ToArray();
            }
            set => _availableTestObjectTypes = new List<string>(value);
        }
        private int _testObjectTypeIndex = -1;
        public int TestObjectTypeIndex
        {
            get
            {
                if (string.IsNullOrEmpty(TestObjectType)) { return -1; }
                return _availableTestObjectTypes.IndexOf(TestObjectType);
            }
            set
            {
                TestObjectType = value >= 0 ? _availableTestObjectTypes[value] : null;
                _testObjectTypeIndex = value;

                TemplateAllChannels = _channels.Select(pc => new TestObjectTemplateChannel(new TestObjectTemplateChannel(pc), /*ref db,*/ _template)).ToArray();
            }
        }
        public static MMETestObjects GetNonISOTestObject()
        {
            var existingobjects = ((App)Application.Current).IsoDb.GetTestObjects(false);

            var codes = new List<string>();

            foreach (var existingobject in existingobjects)
            {
                if (existingobject.Text_L1 == Constants.NON_ISO_TESTOBJECT_NAME)
                {
                    return existingobject;
                }
                codes.Add(existingobject.Test_Object);
            }

            //first try to find a suitable alpha character that isn't in use
            for (var i = (int)'A'; i <= 'Z'; i++)
            {
                var s = new string(new[] { (char)i });
                if (!codes.Contains(s))
                {
                    var to = new MMETestObjects(Guid.NewGuid().ToString(), s, Constants.NON_ISO_TESTOBJECT_NAME, Constants.NON_ISO_TESTOBJECT_NAME, 1,
                            DateTime.Now, "SYSTEM", false, "", DateTime.Now, "created", "", MMEPossibleChannels.MMEChannelTypes.SQL);
                    ((App)Application.Current).IsoDb.Commit(to);
                    return to;
                }
            }
            //didn't find one, now try for a suitable numeric character
            for (var i = (int)'0'; i <= '9'; i++)
            {
                var s = new string(new[] { (char)i });
                if (codes.Contains(s)) continue;
                var to = new MMETestObjects(Guid.NewGuid().ToString(), s, Constants.NON_ISO_TESTOBJECT_NAME, Constants.NON_ISO_TESTOBJECT_NAME, 1,
                    DateTime.Now, "SYSTEM", false, "", DateTime.Now, "created", "", MMEPossibleChannels.MMEChannelTypes.SQL);
                ((App)Application.Current).IsoDb.Commit(to);
                return to;
            }
            throw new NotSupportedException("TestObjectTemplate_CouldNotCreateNONISOTESTOBJECT");
        }
        public ISO.TestObjectTemplate ToISOTestObjectTemplate()
        {
            var template = new ISO.TestObjectTemplate(TemplateName, IsLocalOnly)
            {
                Description = TemplateDescription,
                OriginalTemplateName = OriginalTemplateName,
                Embedded = Embedded,
                Icon = "",
                LocalOnly = IsLocalOnly,
                TestObject = TestObject.Test_Object,
                TestObjectType = TestObjectType
            };
            var zones = new List<TemplateZone>();
            foreach (var zone in TemplateZones)
            {
                var isoZone = new TemplateZone(TemplateName, zone.Name, zone.GetPictureName(), zone.Description);

                var i = 0;
                isoZone.TemplateRegions = zone.Regions.Select(region => region.ToISORegion(this, zone, i++)).ToArray();
                zones.Add(isoZone);
            }
            template.TemplateParent = TemplateParent;
            template.Channels = TemplateAllChannels;
            template.Zones = zones.ToArray();
            template.SysBuilt = SysBuilt;
            return template;
        }
        private int CompareChannels(TestObjectTemplateChannel left, TestObjectTemplateChannel right)
        {
            if (left == right) { return 0; }
            if (null == left) { return -1; }
            return null == right ? 1 : left.DisplayOrder.CompareTo(right.DisplayOrder);
        }
        public TestObjectTemplate(TestObjectTemplate copy, ref ISO13499FileDb db)
        {
            if (null != copy._template) { _template = new ISO.TestObjectTemplate(copy._template, ref db); }
            TemplateDescription = copy.TemplateDescription;
            TemplateParent = copy.TemplateParent;
            TemplateName = copy.TemplateName;
            LastModified = copy.LastModified;
            LastModifiedBy = copy.LastModifiedBy;
            TestObject = copy.TestObject;
            TestObjectType = copy.TestObjectType;
            foreach (var c in copy.RequiredChannels)
            {
                RequiredChannels.Add(new TestObjectTemplateChannel(c, /*ref db,*/ _template));
            }
            TemplateAllChannels = copy.TemplateAllChannels.Select(c => new TestObjectTemplateChannel(c, /*ref db,*/ _template)).ToArray();

            TemplateZones = copy.TemplateZones.Select(z => new Zone(z, this)).ToArray();
            SysBuilt = copy.SysBuilt;
            Embedded = copy.Embedded;
            OriginalTemplateName = copy.OriginalTemplateName;
        }
        public TestObjectTemplate(ISO.TestObjectTemplate template, ref ISO13499FileDb db)
        {
            Initialize(template, ref db, null);
        }
        private void Initialize(ISO.TestObjectTemplate template, ref ISO13499FileDb db, List<MMETestObjects> testObjects)
        {
            _template = template;
            TemplateDescription = template.Description;
            TemplateName = template.TemplateName;
            LastModified = template.LastModified;
            LastModifiedBy = template.LastModifiedBy;

            //if a list of test objects is provided, check if the test object we wish is in the list, if so use it
            var bFoundTestObject = false;
            if (null != testObjects)
            {
                var matches = from to in testObjects where to.Test_Object == template.TestObject select to;
                var mmeTestObjectses = matches as MMETestObjects[] ?? matches.ToArray();
                if (mmeTestObjectses.Any())
                {
                    TestObject = mmeTestObjectses[0];
                    bFoundTestObject = true;
                }
            }
            if (!bFoundTestObject)
            {
                TestObject = (Application.Current as App).IsoDb.GetTestObjectByIso(template.TestObject);
            }
            TestObjectType = template.TestObjectType;
            OriginalTemplateName = template.OriginalTemplateName;
            Embedded = template.Embedded;

            TemplateAllChannels = template.Channels.Select(c => new TestObjectTemplateChannel(c, /*ref db,*/ _template)).ToArray();
            TemplateZones = template.Zones.Select(z => new Zone(z, this)).ToArray();
            TemplateParent = template.TemplateParent;
            SysBuilt = template.SysBuilt;
        }
        public TestObjectTemplate()
        {
            TemplateName = string.Empty;
            TemplateDescription = string.Empty;
            TemplateParent = string.Empty;


            switch (SerializedSettings.ISOSupportLevel)
            {
                case SerializedSettings.ISOSupportLevels.ISO_ONLY:
                    TestObject = ((App)Application.Current).IsoDb.GetTestObjects(false).FirstOrDefault();
                    break;
                case SerializedSettings.ISOSupportLevels.NO_ISO:
                    //need to create a template just for this object!
                    InitializeNonISO();
                    break;
                case SerializedSettings.ISOSupportLevels.TRANSITORY:
                    TestObject = ((App)Application.Current).IsoDb.GetTestObjects(false).FirstOrDefault();
                    break;
            }
        }
        private void InitializeNonISO()
        {
            //create template, set template channel type to NONISOTYPE
            TemplateName = Guid.NewGuid().ToString();

            TestObject = GetNonISOTestObject();
            TestObjectType = Constants.NON_ISO_TESTOBJECT_CHANNEL_TYPE;
        }
    }
}