text: """
  SC101 Baby Names Project
  Adapted from Nick Parlante's Baby Names assignment by
  Jerry Liao.
  
  YOUR DESCRIPTION HERE
  """
  
  import tkinter
  import babynames
  import babygraphicsgui as gui
  
  FILENAMES = [
      'data/full/baby-1900.txt', 'data/full/baby-1910.txt',
      'data/full/baby-1920.txt', 'data/full/baby-1930.txt',
      'data/full/baby-1940.txt', 'data/full/baby-1950.txt',
      'data/full/baby-1960.txt', 'data/full/baby-1970.txt',
      'data/full/baby-1980.txt', 'data/full/baby-1990.txt',
      'data/full/baby-2000.txt', 'data/full/baby-2010.txt'
  ]
  CANVAS_WIDTH = 1000
  CANVAS_HEIGHT = 600
  YEARS = [1900, 1910, 1920, 1930, 1940, 1950, 1960, 1970, 1980, 1990, 2000, 2010]
  GRAPH_MARGIN_SIZE = 20
  COLORS = ['red', 'purple', 'green', 'blue']
  TEXT_DX = 2
  LINE_WIDTH = 2
  MAX_RANK = 1000
  
  
  def get_x_coordinate(width, year_index):
      """
      Given the width of the canvas and the index of the current year
      in the YEARS list, returns the x coordinate of the vertical
      line associated with that year.
  
      Input:
          width (int): The width of the canvas
          year_index (int): The index of the current year in the YEARS list
      Returns:
          x_coordinate (int): The x coordinate of the vertical line associated
                                with the specified year.
      """
      spacing = (width - GRAPH_MARGIN_SIZE * 2) / len(YEARS)
      x_coordinate = year_index * spacing + GRAPH_MARGIN_SIZE
      return x_coordinate
  
  
  def draw_fixed_lines(canvas):
      """
      Erases all existing information on the given canvas and then
      draws the fixed background lines on it.
  
      Input:
          canvas (Tkinter Canvas): The canvas on which we are drawing.
  
      Returns:
          This function does not return any value.
      """
      canvas.delete('all')            # delete all existing lines from the canvas
  
      # Write your code below this line
      #################################
      canvas.create_line(GRAPH_MARGIN_SIZE, GRAPH_MARGIN_SIZE, CANVAS_WIDTH - GRAPH_MARGIN_SIZE, GRAPH_MARGIN_SIZE)
      canvas.create_line(GRAPH_MARGIN_SIZE, CANVAS_HEIGHT - GRAPH_MARGIN_SIZE, CANVAS_WIDTH - GRAPH_MARGIN_SIZE,
                         CANVAS_HEIGHT - GRAPH_MARGIN_SIZE)
      canvas.create_line(GRAPH_MARGIN_SIZE, 0, GRAPH_MARGIN_SIZE, CANVAS_HEIGHT)
      for i in range(len(YEARS)):
          x = get_x_coordinate(CANVAS_WIDTH, i)
          canvas.create_line(x, 0, x, CANVAS_HEIGHT)
          canvas.create_text(x + TEXT_DX, CANVAS_HEIGHT - GRAPH_MARGIN_SIZE, text=str(YEARS[i]), anchor='nw')
  
  
  def draw_names(canvas, name_data, lookup_names):
      """
      Given a dict of baby name data and a list of name, plots
      the historical trend of those names onto the canvas.
  
      Input:
          canvas (Tkinter Canvas): The canvas on which we are drawing.
          name_data (dict): Dictionary holding baby name data
          lookup_names (List[str]): A list of names whose data you want to plot
  
      Returns:
          This function does not return any value.
      """
      draw_fixed_lines(canvas)        # draw the fixed background grid
  
      # Write your code below this line
      #################################
      rank_height = (CANVAS_HEIGHT - GRAPH_MARGIN_SIZE*2)/1000
  
      # Name
      for i in range(len(lookup_names)):
          name = lookup_names[i]
          # Year
          for j in range(1, len(YEARS)):
              x1 = get_x_coordinate(CANVAS_WIDTH, j-1)
              x2 = get_x_coordinate(CANVAS_WIDTH, j)
              year1 = str(YEARS[j-1])
              if year1 in name_data[name]:
                  rank1 = int(name_data[name][year1])
                  y1 = rank1*rank_height + GRAPH_MARGIN_SIZE
              else:
                  rank1 = '*'
                  y1 = CANVAS_HEIGHT-GRAPH_MARGIN_SIZE
              year2 = str(YEARS[j])
              if year2 in name_data[name]:
                  rank2 = int(name_data[name][year2])
                  y2 = rank2*rank_height + GRAPH_MARGIN_SIZE
              else:
                  rank2 = '*'
                  y2 = CANVAS_HEIGHT-GRAPH_MARGIN_SIZE
              # Color
              for k in range(len(COLORS)):
                  if i % len(COLORS) == k:
                      color = COLORS[k]
              canvas.create_line(x1, y1, x2, y2, fill=color, width=LINE_WIDTH)
              canvas.create_text(x1 + TEXT_DX, y1, text=(name, rank1), anchor='sw', fill=color)
              if j == len(YEARS)-1:
                  canvas.create_text(x2 + TEXT_DX, y2, text=(name, rank2), anchor='sw', fill=color)
  
  
  # main() code is provided, feel free to read through it but DO NOT MODIFY
  def main():
      # Load data
      name_data = babynames.read_files(FILENAMES)
  
      # Create the window and the canvas
      top = tkinter.Tk()
      top.wm_title('Baby Names')
      canvas = gui.make_gui(top, CANVAS_WIDTH, CANVAS_HEIGHT, name_data, draw_names, babynames.search_names)
  
      # Call draw_fixed_lines() once at startup so we have the lines
      # even before the user types anything.
      draw_fixed_lines(canvas)
  
      # This line starts the graphical loop that is responsible for
      # processing user interactions and plotting data
      top.mainloop()
  
  
  if __name__ == '__main__':
      main()
  