//
//  Oric.cpp
//  Clock Signal
//
//  Created by Thomas Harte on 11/10/2016.
//  Copyright © 2016 Thomas Harte. All rights reserved.
//

#include "Oric.hpp"

using namespace Oric;

Machine::Machine() : _cycles_since_video_update(0)
{
	set_clock_rate(1000000);
	_via.set_interrupt_delegate(this);
	_keyboard.reset(new Keyboard);
	_via.keyboard = _keyboard;
	clear_all_keys();
}

void Machine::configure_as_target(const StaticAnalyser::Target &target)
{
}

void Machine::set_rom(std::vector<uint8_t> data)
{
	memcpy(_rom, data.data(), std::min(data.size(), sizeof(_rom)));
}

unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value)
{
	if(address >= 0xc000)
	{
		if(isReadOperation(operation)) *value = _rom[address&16383];
	}
	else
	{
		if((address & 0xff00) == 0x0300)
		{
			if(isReadOperation(operation)) *value = _via.get_register(address);
			else _via.set_register(address, *value);
		}
		else
		{
			if(isReadOperation(operation))
				*value = _ram[address];
			else
			{
				if(address >= 0x9800) update_video();
				_ram[address] = *value;
			}
		}
	}

	_via.run_for_half_cycles(2);
	_cycles_since_video_update++;
	return 1;
}

void Machine::synchronise()
{
	update_video();
}

void Machine::update_video()
{
	_videoOutput->run_for_cycles(_cycles_since_video_update);
	_cycles_since_video_update = 0;
}

void Machine::setup_output(float aspect_ratio)
{
	_videoOutput.reset(new VideoOutput(_ram));
	_via.ay8910.reset(new GI::AY38910());
}

void Machine::close_output()
{
	_videoOutput.reset();
}

void Machine::mos6522_did_change_interrupt_status(void *mos6522)
{
	set_irq_line(_via.get_interrupt_line());
}

void Machine::set_key_state(Key key, bool isPressed)
{
	if(key == KeyNMI)
	{
		set_nmi_line(isPressed);
	}
	else
	{
		if(isPressed)
			_keyboard->rows[key >> 8] |= (key & 0xff);
		else
			_keyboard->rows[key >> 8] &= ~(key & 0xff);
	}
}

void Machine::clear_all_keys()
{
	memset(_keyboard->rows, 0, sizeof(_keyboard->rows));
}