import sys
import re

def replace_func_in_content(content, func_name, new_func_content):
    # Match from optional decorators up to the start of the next top-level definition or end of file
    # We use re.MULTILINE so ^ matches start of line
    # We use re.DOTALL so . matches newline
    # We use a non-greedy match for the body but stop before another top-level def/class/@
    
    # This regex finds the function including its decorators
    # and everything until the next function/class starts at the beginning of a line
    pattern = re.compile(
        r'(^(@.*?
)*def ' + func_name + r'\(.*\):.*?)(\n+(?=@|def |class )|\Z)',
        re.MULTILINE | re.DOTALL
    )
    
    if pattern.search(content):
        return pattern.sub(new_func_content.strip() + '\n\n', content)
    else:
        # Fallback if there's something slightly different (e.g. no decorators but regex expected them)
        pattern = re.compile(
            r'(^def ' + func_name + r'\(.*\):.*?)(\n+(?=@|def |class )|\Z)',
            re.MULTILINE | re.DOTALL
        )
        if pattern.search(content):
            return pattern.sub(new_func_content.strip() + '\n\n', content)
        else:
            print(f"Warning: Could not find function {func_name}")
            return content

file_path = 'core/views.py'
with open(file_path, 'r') as f:
    content = f.read()

# Add helper before voter_advanced_search if not exists
with open('core/filter_helper.py', 'r') as f:
    helper = f.read().strip()

if 'def get_filtered_voter_queryset' not in content:
    content = content.replace('def voter_advanced_search', helper + '\n\n' + 'def voter_advanced_search')

with open('core/views_new.py', 'r') as f:
    voter_advanced_search_new = f.read().strip()

with open('core/bulk_sms_new.py', 'r') as f:
    bulk_send_sms_new = f.read().strip()

with open('core/bulk_email_new.py', 'r') as f:
    voter_bulk_send_email_new = f.read().strip()

with open('core/export_new.py', 'r') as f:
    export_voters_csv_new = f.read().strip()

content = replace_func_in_content(content, 'voter_advanced_search', voter_advanced_search_new)
content = replace_func_in_content(content, 'bulk_send_sms', bulk_send_sms_new)
content = replace_func_in_content(content, 'voter_bulk_send_email', voter_bulk_send_email_new)
content = replace_func_in_content(content, 'export_voters_csv', export_voters_csv_new)

with open(file_path, 'w') as f:
    f.write(content)