import re

# Slider Task
# List of sliders
num_sliders = 2


# Read in the file
with open('models.py', 'r', encoding='utf-8') as f:
    filedata = f.read()
    result = re.search('num_sliders = (\d+) # Number of sliders', filedata)
result = result[0]
print(result)

# Replace the target string
filedata = filedata.replace(result, 'num_sliders = '+str(num_sliders)+' # Number of sliders')

# Write the file out again
with open('models.py', 'w', encoding='utf-8') as f:
  f.write(filedata)

# Read in the new file
with open('models.py', 'r', encoding='utf-8') as f:
    filedata = f.read()
    result = re.search('num_sliders = (\d+) # Number of sliders', filedata)
result = result[0]
print(result)


# Create Slider Fields
slider_list = []
for i in range(1, num_sliders + 1):
    slider_list.append('slider' + str(i))
print(slider_list)
with open('slider_fields.txt', 'w', encoding='utf-8') as f:
    f.write('# Insert_Sliders_Start\r')
for slider in slider_list:
    with open('slider_fields.txt', 'a', encoding='utf-8') as f:
        f.write(
            '    '+slider + ' = models.IntegerField(\r        min=random_min(), max=random_max(),\r        widget=widgets.Slider(),\r        initial=random_initial())\r')
with open('slider_fields.txt', 'a', encoding='utf-8') as f:
    f.write('    # Insert_Sliders_End')
with open('slider_fields.txt', 'r', encoding='utf-8') as f:
    new_slider_fields = f.read()


# Replace Slider Fields in models.py
# Read in the models.py file
with open('models.py', 'r', encoding='utf-8') as f:
    old_model = f.read()
    old_slider_fields = re.search('(?s)(# Insert_Sliders_Start)(.*)(# Insert_Sliders_End)', old_model)
old_slider_fields = old_slider_fields[0]
print(old_slider_fields)

# Replace the target string
new_model = old_model.replace(old_slider_fields, new_slider_fields)

# Write the file out again
with open('models.py', 'w', encoding='utf-8') as f:
  f.write(new_model)

# Read in the models.py file
with open('models.py', 'r', encoding='utf-8') as f:
    new_model = f.read()
    new_slider_fields = re.search('(?s)(?<=# Insert_Sliders_Start)(.*)(?=# Insert_Sliders_End)', new_model)
new_slider_fields = new_slider_fields[0]
print(new_slider_fields)