# Render the window

import curses

class Render():

  def __init__(self):
    print("Starting Render-Engine")
    

  def renderScreen(stdscr, gamestate, centerx, centery):

    # Calculate what to render
    # Get screen y and x
    height, width = stdscr.getmaxyx()

    top_left_x = centerx - round(width/2)
    top_left_y = centery - round(height/2)

    xoffset = 0
    yoffset = 0
    if width > gamestate.metadata['width']:
      xoffset = round( (width - gamestate.metadata['width'])/2 )
    if height > gamestate.metadata['height']:
      yoffset = round( (height-gamestate.metadata['height'])/2 )


    # Draw the visible segment of the map
    for y in range(1,height):
      top_left_x = centerx - round(width/2)
      for x in range(1,width-3):
        if top_left_y <= 0 or top_left_y > gamestate.metadata['height'] or top_left_x <= 0 or top_left_x > gamestate.metadata['width']:
          stdscr.addstr( y-1, x-1, " ", curses.color_pair(7))
        elif gamestate.terrain[top_left_x][top_left_y] == "l":
          stdscr.addstr( y-1, x-1, "+", curses.color_pair(1) )
        elif gamestate.terrain[top_left_x][top_left_y] == "w":
          stdscr.addstr( y-1, x-1, ".", curses.color_pair(2) )
        elif gamestate.terrain[top_left_x][top_left_y] == "c":
          stdscr.addstr( y-1, x-1, "*" )
        top_left_x += 1
      top_left_y += 1


##### Print the horizontal ruler at the bottom of the screen
    xruler = ""
    xrulery = 0
    xrulerx = 0
    xrulerx_offset = 0


    if width > gamestate.metadata['width']:
      xrulerx_offset = xoffset + 1
      xrulerx = gamestate.metadata['width']
    elif width < gamestate.metadata['width']:
      xrulerx = width
    else:
      xrulerx = gamestate.metadata['width']


    if gamestate.metadata['height']-1 < height-1:
      xrulery = yoffset+gamestate.metadata['height']
    else:
      xrulery = height-1


    skip = 0
    if width > gamestate.metadata['width']:
      xruler_start = 0
      xruler_end = gamestate.metadata['width']
    else:
      xruler_start = centerx - round(width/2)
      xruler_end = (xruler_start + width) - 4

    for scale in range(xruler_start,xruler_end):
      if skip != 0:
        skip-=1
        continue
      if scale%10 == 0:
        skip=len(str(scale))-1
        xruler+=str(scale)
      elif str(scale)[-1:]=="5":
        xruler+="|"
      else:
        xruler+="."
    stdscr.addstr( xrulery, xrulerx_offset, xruler )


##### Print the verticle ruler
    yruler = centery - round(height/2)
    yruler_offset = 0
    yrulery = 1
    #yruler = 0
    yrulerx = 0

    if width > gamestate.metadata['width']:
      yrulerx = int((width - gamestate.metadata['width'])/2)+1+gamestate.metadata['width']
      yruler_offset = (width - gamestate.metadata['width'])/2
    elif gamestate.metadata['width'] < width-4:
      yrulerx = gamestate.metadata['width']
    else:
      yrulerx = width-4

    while yrulery < height-1 and yrulery-yruler_offset < gamestate.metadata['height'] and yruler <= gamestate.metadata['height']-1:
      if yruler >= 0:
        if yruler%5==0:
          yruler_text = "{: >3}".format( yruler )
          stdscr.addstr( yrulery, yrulerx, yruler_text )
        else:
          stdscr.addstr( yrulery, yrulerx, "{: >3}".format(".") )
      yruler+=1
      yrulery+=1

    # Return stdscr asif nothing happened
    return stdscr