using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Mesen.GUI.Controls;
using Mesen.GUI.Forms;

namespace Mesen.GUI.Debugger.Controls
{
	public partial class ctrlConsoleStatus : BaseControl
	{
		private EntityBinder _cpuBinder = new EntityBinder();
		private DebugState _lastState;

		public ctrlConsoleStatus()
		{
			InitializeComponent();
			if(IsDesignMode) {
				return;
			}

			_cpuBinder.Entity = new CpuState();
			_cpuBinder.AddBinding("A", txtA);
			_cpuBinder.AddBinding("X", txtX);
			_cpuBinder.AddBinding("Y", txtY);
			_cpuBinder.AddBinding("D", txtD);
			_cpuBinder.AddBinding("DBR", txtDB);
			_cpuBinder.AddBinding("SP", txtS);
			_cpuBinder.AddBinding("PS", txtP);

			_cpuBinder.AddBinding("NmiFlag", chkNmi);
		}

		public void UpdateStatus(DebugState state)
		{
			_lastState = state;

			_cpuBinder.Entity = state.Cpu;
			_cpuBinder.UpdateUI();

			txtPC.Text = ((state.Cpu.K << 16) | state.Cpu.PC).ToString("X6");
			txtCycle.Text = state.Ppu.Cycle.ToString();
			txtScanline.Text = state.Ppu.Scanline.ToString();
			txtHClocks.Text = (state.Ppu.Cycle * 4).ToString();

			UpdateCpuFlags();

			chkIrq.Checked = state.Cpu.IrqSource != 0;
			UpdateStack();
		}

		private void UpdateCpuFlags()
		{
			ProcFlags flags = _lastState.Cpu.PS;
			chkIndex.Checked = flags.HasFlag(ProcFlags.IndexMode8);
			chkCarry.Checked = flags.HasFlag(ProcFlags.Carry);
			chkDecimal.Checked = flags.HasFlag(ProcFlags.Decimal);
			chkInterrupt.Checked = flags.HasFlag(ProcFlags.IrqDisable);
			chkNegative.Checked = flags.HasFlag(ProcFlags.Negative);
			chkOverflow.Checked = flags.HasFlag(ProcFlags.Overflow);
			chkMemory.Checked = flags.HasFlag(ProcFlags.MemoryMode8);
			chkZero.Checked = flags.HasFlag(ProcFlags.Zero);
		}

		private void UpdateStack()
		{
			StringBuilder sb = new StringBuilder();
			for(UInt32 i = (uint)_lastState.Cpu.SP + 1; (i & 0xFF) != 0; i++) {
				sb.Append("$");
				sb.Append(DebugApi.GetMemoryValue(SnesMemoryType.CpuMemory, i).ToString("X2"));
				sb.Append(", ");
			}
			string stack = sb.ToString();
			if(stack.Length > 2) {
				stack = stack.Substring(0, stack.Length - 2);
			}
			txtStack.Text = stack;
		}
	}
}