using InABox.Core;
using InABox.Mobile;
using Xamarin.Forms;

namespace PRS.Mobile
{
    public class DigitalFormStringEntry : MobileCard, IDigitalFormField<DFLayoutStringField, DFLayoutStringFieldProperties, string, string?>
    {

        private string _value = "";
        private readonly MobileEntry _entry;
        
        private DFLayoutStringField? _definition;
        public DFLayoutStringField? Definition
        {
            get => _definition;
            set
            {
                _definition = value;
                Initialize(value);
            } 
        }
        
        public string Value
        {
            get => _value;
            set
            {
                _value = value;
                UpdateUI();
            }
        }

        private void UpdateUI()
        {
            _entry.Text = _value;
        }

        public bool IsEmpty => string.IsNullOrWhiteSpace(Value);

        private bool _readOnly;
        public bool ReadOnly
        {
            get => _readOnly;
            set
            {
                _readOnly = value;
                UpdateStatus();
            }
        }
        
        public void Deserialize(DFLoadStorageEntry entry) 
            => Value = Definition?.Properties.DeserializeValue(entry) ?? string.Empty;
        
        public void Serialize(DFSaveStorageEntry entry) 
            => entry.SetValue(Value);

        public event DigitalFormViewChangedHandler? ValueChanged;

        public DigitalFormStringEntry()
        {
            HeightRequest = 40;
            Padding = new Thickness(5,0);
            
            _entry = new MobileEntry()
            {
                Placeholder = "Enter answer",
                BackgroundColor = Color.Transparent
            };
            _entry.TextChanged += (o,e) =>
            {
                Value = _entry.Text;
                ValueChanged?.Invoke(this, new DigitalFormViewChangedArgs(Definition,Value));
            };
            Content = _entry;
        }

        private void Initialize(DFLayoutStringField? definition)
        {
            UpdateStatus();
        }

        private void UpdateStatus()
        {
            IsEnabled = !_readOnly && Definition?.Properties.Secure == false;
            var colors = DigitalFormUtils.GetColors(!IsEnabled, Definition?.Properties.Required ?? false, false);
            BackgroundColor = colors.Background;
            BorderColor = colors.Border;
            _entry.TextColor = colors.Foreground;
        }
    
    }
}