package nes

import (
	"crecher.net/gones/v2/cart"
	"crecher.net/gones/v2/cpu"
)

type Console struct {
	CPU  *cpu.CPU
	Cart *cart.Cartridge
	RAM  [0x800]uint8
	// PPU, APU, controllers once they exist
	cycles uint64
}

func New(c *cart.Cartridge) *Console {
	n := &Console{Cart: c}
	n.CPU = cpu.NewCPU(n)
	n.CPU.Reset()
	return n
}

func (n *Console) Step() int {
	cycles := n.CPU.Step()
	n.cycles += uint64(cycles)
	return cycles
}

func (n *Console) StepFrame() {
	// 29780 is roughly one frame:
	// ~ 1789773 cycles per sec
	// ~ 60.1 fps
	// 1789773 / 60.1 = 29779.916...
	const cyclesPerFrame = 29780
	for done := 0; done < cyclesPerFrame; {
		done += n.Step()
	}
}