using System;
using InABox.Core;
using InABox.Mobile;

namespace PRS.Mobile
{
    public class DigitalFormTimeEntry : MobileTimeButton, IDigitalFormField<DFLayoutTimeField, DFLayoutTimeFieldProperties, TimeSpan, TimeSpan?>
    {
        private TimeSpan _value = TimeSpan.Zero;
        
        private DFLayoutTimeField? _definition;
        public DFLayoutTimeField? Definition
        {
            get => _definition;
            set
            {
                _definition = value;
                Initialize(value ??  new DFLayoutTimeField());
            } 
        }
        
        public TimeSpan Value
        {
            get => _value;
            set
            {
                _value = value;
                UpdateUI();
            }
        }

        private void UpdateUI()
        {
            Time = _value;
        }

        protected override void DoChanged()
        {
            _value = Time;
            base.DoChanged();
        }

        public bool IsEmpty => Value.Equals(TimeSpan.Zero);

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

        public event DigitalFormViewChangedHandler? ValueChanged;

        public DigitalFormTimeEntry()
        {
            Prompt = "";
            OnPropertyChanged(nameof(Time));
            HeightRequest = 40;
            Changed += (sender, args) =>
            {
                ValueChanged?.Invoke(this, new DigitalFormViewChangedArgs(Definition,Value));
            };
        }

        private void Initialize(DFLayoutTimeField definition)
        {
            UpdateStatus();
        }

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