import os
import json
import tiktoken

encoding = tiktoken.get_encoding("cl100k_base")

merged_md_file_path = "hermes-toth.md"
merged_jsonl_file_path = "hermes-toth.json"

excluded = (merged_md_file_path, "README.md")


def merge_to_md():
    """
    Merges all .md files in the current directory into a single md file.
    """
    with open(merged_md_file_path, "w") as merged_file:
        first_file = True
        for root, _, files in os.walk("."):
            for file in files:
                if file.endswith(".md") and file not in excluded:
                    print(f"Merging file: {file} into {merged_md_file_path}")
                    file_path = os.path.join(root, file)
                    with open(file_path, "r", encoding="utf-8") as f:
                        contents = f.read()
                        if not first_file:
                            merged_file.write("\n\n\n")
                        merged_file.write(contents)
                        first_file = False


def merge_to_jsonl():
    """
    Merges all .md files in the current directory into a single jsonl file.
    """
    with open(merged_jsonl_file_path, "w") as merged_file:
        first_file = True
        for root, _, files in os.walk("."):
            for file in files:
                if file.endswith(".md") and file not in excluded:
                    print(f"Merging file: {file} into {merged_jsonl_file_path}")
                    file_path = os.path.join(root, file)
                    with open(file_path, "r", encoding="utf-8") as f:
                        contents = f.read()
                        if not first_file:
                            merged_file.write("\n")
                        data = {"text": contents}
                        json.dump(data, merged_file, ensure_ascii=False)
                        first_file = False


def token_count():
    """
    Counts the number of tokens in the merged dataset.
    """
    with open(merged_md_file_path, "r", encoding="utf-8") as merged_file:
        tokenized = encoding.encode(merged_file.read())
        print(f"Merged dataset has: {len(tokenized)} tokens.")


if __name__ == "__main__":
    merge_to_md()
    merge_to_jsonl()
    token_count()