import os

def split_wiki():
    input_file = "wikitop10.txt"
    output_dir = "tests/test_data/wiki_top10"
    os.makedirs(output_dir, exist_ok=True)
    
    # Pre-defined start lines (1-indexed)
    boundaries = [
        (1, "United Kingdom"),
        (108, "Physics"),
        (232, "Chemistry"),
        (337, "United States"),
        (497, "Science"),
        (693, "Isaac Newton"),
        (729, "Leonardo da Vinci"),
        (813, "Evolution"),
        (1045, "Albert Einstein"),
        (1156, "India")
    ]
    
    with open(input_file, 'r', encoding='utf-8', errors='ignore') as f:
        lines = f.readlines()
        
    for i in range(len(boundaries)):
        start_idx = boundaries[i][0] - 1
        title = boundaries[i][1].replace(" ", "_").lower()
        
        if i < len(boundaries) - 1:
            end_idx = boundaries[i+1][0] - 1
        else:
            end_idx = len(lines)
            
        article_content = "".join(lines[start_idx:end_idx]).strip()
        filename = f"{title}.txt"
        filepath = os.path.join(output_dir, filename)
        
        with open(filepath, 'w', encoding='utf-8') as out:
            out.write(article_content)
            
        print(f"Created {filename} ({len(article_content)} chars)")

if __name__ == "__main__":
    split_wiki()