#!/usr/bin/env python

#KLL syscall_test.py
# syscall2.py take command line parameter


import pygame
from pygame.locals import *
import sys
import os
import subprocess
import getopt

mytitle="syscall2.py KLL"

WINDOWWIDTH = 380       # size of window's width in pixels
WINDOWHEIGHT =240      # size of windows' height in pixels

msgcall = 'aconnect -i -o -l'

# show text
msg="_"
msgline = 50 # chars
ipady = 10
ipadx = 10

# button
ibuttonwide = 50
ibuttonhigh = 17
buttonmsg = "start"
ipadbuttony = WINDOWHEIGHT - ibuttonhigh -10
ipadbuttonx = WINDOWWIDTH - ibuttonwide -10

unselborder = 1
selborder = 3

FPS = 20                # frames per second, the general speed of the program


WHITE    = (255, 255, 255)
BLACK    = (  0,   0,   0)
GREY     = (125, 125, 125)
PURPLE   = (255,   0, 255)
CYAN     = (  0, 255, 255)
RED      = (255,   0,   0)

unselcol = GREY
selcol   = CYAN

mousex = 0 # used to store x coordinate of mouse event
mousey = 0 # used to store y coordinate of mouse event

#______________________________________________________________________
def draw_button():
    # START button
    bord= unselborder
    bcol = unselcol
    myfont = pygame.font.SysFont("monospace",16,bold=True)
    pygame.draw.rect(DISPLAYSURF, bcol,(ipadbuttonx-bord, ipadbuttony-bord,ibuttonwide+2*bord,ibuttonhigh+2*bord),bord)
    DISPLAYSURF.blit(myfont.render(buttonmsg,1,WHITE,BLACK),(ipadbuttonx,ipadbuttony))
#______________________________________________________________________
def sel_button(x, y):
    # START button under mouse
    boxRect = pygame.Rect(ipadbuttonx,ipadbuttony,ibuttonwide,ibuttonhigh)
    if boxRect.collidepoint(x, y):
        bord=selborder
        pygame.draw.rect(DISPLAYSURF,selcol, (ipadbuttonx - bord, ipadbuttony - bord, ibuttonwide + 2*bord,ibuttonhigh + 2*bord), bord)
        return True
    return False
#______________________________________________________________________
def draw_msg():
    myfont = pygame.font.SysFont("monospace",12,bold=True)
    # show syscall
    DISPLAYSURF.blit(myfont.render(msgcall,1,PURPLE,WHITE),(ipadx,0))
    myfont = pygame.font.SysFont("monospace",10,bold=True)
    # show long text as a multiline box
    # if sysmsg is multiline ( NL.. ) need extra line wrap here
    nextline = myfont.get_linesize()
    y=ipady
    #print "line hight %s" % (nextline)
    #print "text chars %s" % (len(msg))
    Tend = len(msg)
    Tstart = 0
    Tstep = msgline # chars per line
    Tnextstep=Tstart
    Tlast = False
    NONL  = False
    NL = "\n"
    while ( Tlast == False ) :
        Tthisstep=Tnextstep
        Tnextstep=Tnextstep+Tstep
        if Tnextstep > Tend:
            Tnextstep = Tend
            Tlast = True
        NONL  = False
        if True : #while ( NONL == False ) : 
            msgx=msg[Tthisstep:Tnextstep]
            whereisNL = msgx.find(NL)
            #print "chars: %s pos0: %s pos1: %s, posin: %s" % (Tend,Tthisstep,Tnextstep,whereisNL)
            if ( whereisNL == -1 ) :
                NONL = True
            else :
                Tnextstep = Tthisstep+whereisNL  # reduce string to until NL
                msgx=msg[Tthisstep:Tnextstep]
                Tnextstep = Tnextstep+1 	# skip NL
                Tlast = False               # not finished
        if ( y < WINDOWHEIGHT - nextline ) : 
            y=y+nextline
            txtcol = BLACK
        else :
            txtcol = RED
        DISPLAYSURF.blit(myfont.render(msgx,1,txtcol,WHITE),(ipadx,y))

#______________________________________________________________________
def sys_execute():
    global msg,msgcall
    msg= "START"
    return_code = os.popen(msgcall).read()
    msg=return_code


#______________________________________________________________________
def mymain(clinstr = "",executer=False):
    global DISPLAYSURF,msg,msgcall
    if ( clinstr <> "" ) : msgcall = clinstr
    
    pygame.init()
    FPSCLOCK = pygame.time.Clock()
    DISPLAYSURF = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
    pygame.display.set_caption(mytitle)
    DISPLAYSURF.fill(WHITE)
    draw_msg()
    pygame.display.update()
    FPSCLOCK.tick(FPS)
    mousex = 0 # used to store x coordinate of mouse event
    mousey = 0 # used to store y coordinate of mouse event

    while True:
        mouseClicked = False
        DISPLAYSURF.fill(WHITE)
        draw_msg()
        if ( executer == False ) :
            draw_button()
        else :
            sys_execute()  # do it without wait for button click

        for event in pygame.event.get():
            if event.type == QUIT:          # close window[x] QUIT event
                pygame.display.quit()
                pygame.quit()
                sys.exit()

            elif event.type == MOUSEMOTION:
                mousex, mousey = event.pos

            elif event.type == MOUSEBUTTONDOWN:
                mousex, mousey = event.pos
                mouseClicked = True

        if ( sel_button(mousex, mousey) and ( executer == False )):
            if ( mouseClicked ) :
                # do START
                sys_execute()
                pass

        pygame.display.update()
        FPSCLOCK.tick(FPS)
        
    pygame.display.quit()
    pygame.quit()
    sys.exit()

# _________________________________________________________________
def main(argv):

    clinstr = ""      # clinstr like  'ls -la'
    executer=False

    try:
        opts, args = getopt.getopt(argv,"hi:e",["instr="])
    except getopt.GetoptError:
        print 'usage: syscall2.py -h -i <command > use like \'ls -la\' -e :not wait start button '

    for opt, arg in opts:
        if opt == '-h' or opt == '--help':
            print 'usage: syscall2.py -h -i <command > use like \'ls -la\' -e :not wait start button '
        elif opt == '-i' or opt == '--instr':
            clinstr = arg
            #print "in: %s" % (clinstr)
        elif opt == '-e' or opt == '--exec':
            executer=True
            #print "exec"
    mymain(clinstr,executer)

# _________________________________________________________________
if __name__ == '__main__':
    
    main(sys.argv[1:])