#!/usr/bin/python2
# -*- coding: utf8 -*-

import pygame, numpy, sys, datetime, wave, time
from orao.cpu import CPU

cpu = CPU(bytearray([0xFF]*0xC000) + bytearray(open('ORAO13.ROM', 'rb').read()))
pygame.mixer.pre_init(44100, 8, 1, buffer=2048)
pygame.init()
ratio, cpu.channel, running = 0, pygame.mixer.Channel(0), True
pygame.time.set_timer(pygame.USEREVENT + 1, 40)

while running:
    before, previous_loop_cycles = datetime.datetime.now(), cpu.cycles
    time_elapsed = lambda: (datetime.datetime.now()-before).microseconds + 1

    for i in range(5000):
        cpu.step()

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

        if event.type == pygame.MOUSEBUTTONDOWN:
            x, y = event.pos
            if 650 < x < 700 and 720 < y < 790:             # Reset button
                cpu.__init__(cpu.memory[:])                 # Warm reset

        if event.type in [pygame.KEYDOWN, pygame.KEYUP]:
            for address, keycodes in cpu._kbd.iteritems():
                keys = map(pygame.key.get_pressed().__getitem__, keycodes)
                cpu.memory[address] = ~numpy.dot(keys, [16,32,64,128][:len(keys)]) & 0xFF

        if event.type == pygame.USEREVENT + 1:
            cpu.screen.blit(cpu.background, [0, 0])
            cpu.screen.blit(pygame.transform.smoothscale(cpu.terminal, (512, 512)), [150, 140])

            pygame.display.set_caption('({0:.2f} MHz) Orao Emulator v0.1'.format(ratio))
            pygame.display.update()

            cpu.tape_out = None if cpu.cycles - cpu.last_sound_cycles > 20000 else cpu.tape_out

            if len(cpu.sndbuf) > 4096 or cpu.sndbuf and cpu.cycles - cpu.last_sound_cycles > 20000:
                while cpu.channel.get_queue():
                    if time_elapsed() > 10000: break

                cpu.channel.queue(pygame.sndarray.make_sound(numpy.uint8(cpu.sndbuf)))
                cpu.sndbuf = []

    overshoot = cpu.cycles - previous_loop_cycles - time_elapsed()
    pygame.time.wait((overshoot > 0) * overshoot // 1000)      # Pričekaj da budemo cycle exact

    ratio = 1.0 * (cpu.cycles - previous_loop_cycles) / time_elapsed()

pygame.quit()