//
// Copyright (c) 2010 - 2019 Antmicro
//
// This file is licensed under the MIT License.
// Full license text is available in 'licenses/MIT.txt'.
//

using System;
using System.Linq;
using Antmicro.Renode.Backends.Display;
using Antmicro.Renode.Core;
using Antmicro.Renode.Core.Structure.Registers;
using Antmicro.Renode.Logging;
using Antmicro.Renode.Peripherals.Bus;
using Antmicro.Renode.Peripherals.Memory;
using Antmicro.Renode.Utilities;

namespace Antmicro.Renode.Peripherals.Input
{
    public class betrusted_kbd : IKeyboard, IDoubleWordPeripheral, IProvidesRegisterCollection<DoubleWordRegisterCollection>, IKnownSize
    {
        public betrusted_kbd(Machine machine) : base(machine)
        {
            this.machine = machine;

            RegistersCollection = new DoubleWordRegisterCollection(this);
            for (int i = 0; i < buffer.Length; i++) buffer[i] = 0;
            // DefineRegisters();
            Reset();
        }

        public void WriteDoubleWord(long address, uint value)
        {
            RegistersCollection.Write(address, value);
        }

        public uint ReadDoubleWord(long offset)
        {
            return RegistersCollection.Read(offset);
        }

        public override void Reset()
        {
            RegistersCollection.Reset();
        }

        public long Size { get{ return  0x800; }}
        public DoubleWordRegisterCollection RegistersCollection { get; private set; }

        // protected override void Repaint()
        // {
        //     var newbuf = new Byte[44*Height];
        //     machine.SystemBus.ReadBytes(bufferAddress, newbuf.Length, newbuf, 0);
        //     for (int y = 0; y < Height; y++) {
        //         if (!updateDirty || updateAll || ((newbuf[y*44+0x2a] & 0x1) == 0x1)) for (int x = 0; x < Width; x++) {
        //             if (((newbuf[((x+y*44*8))/8] >> (x%8))&1) > 0) {
        //                 buffer[2*(x+y*Width)] = 0xFF;
        //                 buffer[2*(x+y*Width)+1] = 0xFF;
        //             } else {
        //                 buffer[2*(x+y*Width)] = 0x0;
        //                 buffer[2*(x+y*Width)+1] = 0x0;
        //             }
        //         }
        //     }
        // }

        // private void DefineRegisters()
        // {
        //     Registers.COMMAND.Define(this)
        //         .WithValueField(0, 32, writeCallback: (_, val) =>
        //                 {
        //                 updateDirty = (val & 0x1) == 0x1;
        //                 updateAll = (val & 0x10) == 0x10;
        //                 DoRepaint();
        //                 })
        //     ;
        // }
        private readonly Machine machine;

        private enum Registers
        {
            ROW0DAT1 = 0x0,
            ROW0DAT0 = 0x4,
            ROW1DAT1 = 0x8,
            ROW1DAT0 = 0xc,
            ROW2DAT1 = 0x10,
            ROW2DAT0 = 0x14,
            ROW3DAT1 = 0x18,
            ROW3DAT0 = 0x1c,
            ROW4DAT1 = 0x20,
            ROW4DAT0 = 0x24,
            ROW5DAT1 = 0x28,
            ROW5DAT0 = 0x2c,
            ROW6DAT1 = 0x30,
            ROW6DAT0 = 0x34,
            ROW7DAT1 = 0x38,
            ROW7DAT0 = 0x3c,
            ROW8DAT1 = 0x40,
            ROW8DAT0 = 0x44,
            EV_STATUS = 0x48,
            EV_PENDING = 0x4c,
            EV_ENABLE = 0x50,
            ROWCHANGE1 = 0x54,
            ROWCHANGE0 = 0x58,
            BUSY = 0x04
        }
    }
}