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

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

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

        private bool _readOnly;
        public bool ReadOnly
        {
            get => _readOnly;
            set
            {
                _readOnly = value;
                UpdateStatus();
            }
        }
        
        public void Deserialize(string serialized)
        {
            if (TimeSpan.TryParseExact(serialized, "c", CultureInfo.InvariantCulture, TimeSpanStyles.None,
                    out TimeSpan t))
                Value = t;
        }

        public string Serialize() => Value.ToString("c");

        public event DigitalFormViewChangedHandler ValueChanged;

        public DigitalFormTimeEntry()
        {
            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;
            var colors = DigitalFormUtils.GetColors(!IsEnabled, Definition.Properties.Required, true);
            BackgroundColor = colors.Background;
            BorderColor = colors.Border;
            TextColor = colors.Foreground;
        }
    
    }
}