import argparse
import os
import json

def verify_file(file_path):
    """
    Verify if the lines in a file have the correct prefix.

    Args:
        file_path (str): The path to the file to be verified.

    Returns:
        bool: True if all lines have the correct prefix, False otherwise.
    """

    with open(file_path, 'r', encoding='utf-8') as file:
        lines = file.readlines()

    for i, line in enumerate(lines):
        if i % 2 == 0:
            if not line.startswith('Q:'):
                return False
        else:
            if not line.startswith('A:'):
                return False

    return True


def generate_jsonlines(directory, output_filename):
    """
    Generate a JSON Lines file from intro.txt and qa.txt files in the given directory.

    Args:
        directory (str): The directory path containing the intro.txt and qa.txt files.
        output_filename (str): The name of the output JSON Lines file to be generated.

    Raises:
        FileNotFoundError: If intro.txt or qa.txt is not found in the given directory.
        ValueError: If qa.txt is not in the correct format.

    """

    if not os.path.exists(os.path.join(directory, 'intro.txt')) or not os.path.exists(os.path.join(directory, 'qa.txt')):
        raise FileNotFoundError('intro.txt or qa.txt not found in the given directory')

    if not verify_file(os.path.join(directory, 'qa.txt')):
        raise ValueError('qa.txt is not in the correct format')

    with open(os.path.join(directory, 'intro.txt'), 'r', encoding='utf-8') as intro_file:
        intro_content = intro_file.read().strip()

    messages = []

    with open(os.path.join(directory, 'qa.txt'), 'r', encoding='utf-8') as qa_file:
        lines = qa_file.readlines()

    for line in lines:
        line = line.strip()
        if line.startswith('Q:'):
            question = line[2:].strip()
        elif line.startswith('A:'):
            messages.append([
                {'role': 'system', 'content': intro_content},
                {'role': 'user', 'content': question},
                {'role': 'assistant', 'content': line[2:].strip()}
            ])

    with open(os.path.join(directory, output_filename), 'w', encoding='utf-8') as jsonl_file:
        for message in messages:
            jsonl_file.write(json.dumps({'messages': message}) + '\n')



def main():

    parser = argparse.ArgumentParser(description='Generate a jsonlines file from intro.txt and qa.txt in a given directory.')
    parser.add_argument('directory', type=str, help='The directory where intro.txt and qa.txt are located.')
    parser.add_argument('output_filename', type=str, help='The name of the output jsonlines file.')

    args = parser.parse_args()

    generate_jsonlines(args.directory, args.output_filename)

if __name__ == '__main__':
    main()