import os
import shutil
import string
import zipfile
import tiktoken
from urllib.parse import urljoin

import requests

from application.core.settings import settings
from application.parser.file.bulk import SimpleDirectoryReader
from application.parser.remote.remote_creator import RemoteCreator
from application.parser.open_ai_func import call_openai_api
from application.parser.schema.base import Document
from application.parser.token_func import group_split

# Define a function to extract metadata from a given filename.
def metadata_from_filename(title):
    store = "/".join(title.split("/")[1:3])
    return {"title": title, "store": store}


# Define a function to generate a random string of a given length.
def generate_random_string(length):
    return "".join([string.ascii_letters[i % 52] for i in range(length)])


current_dir = os.path.dirname(
    os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
)


def extract_zip_recursive(zip_path, extract_to, current_depth=0, max_depth=5):
    """
    Recursively extract zip files with a limit on recursion depth.

    Args:
        zip_path (str): Path to the zip file to be extracted.
        extract_to (str): Destination path for extracted files.
        current_depth (int): Current depth of recursion.
        max_depth (int): Maximum allowed depth of recursion to prevent infinite loops.
    """
    if current_depth > max_depth:
        print(f"Reached maximum recursion depth of {max_depth}")
        return

    with zipfile.ZipFile(zip_path, "r") as zip_ref:
        zip_ref.extractall(extract_to)
    os.remove(zip_path)  # Remove the zip file after extracting

    # Check for nested zip files and extract them
    for root, dirs, files in os.walk(extract_to):
        for file in files:
            if file.endswith(".zip"):
                # If a nested zip file is found, extract it recursively
                file_path = os.path.join(root, file)
                extract_zip_recursive(file_path, root, current_depth + 1, max_depth)


# Define the main function for ingesting and processing documents.
def ingest_worker(self, directory, formats, name_job, filename, user):
    """
    Ingest and process documents.

    Args:
        self: Reference to the instance of the task.
        directory (str): Specifies the directory for ingesting ('inputs' or 'temp').
        formats (list of str): List of file extensions to consider for ingestion (e.g., [".rst", ".md"]).
        name_job (str): Name of the job for this ingestion task.
        filename (str): Name of the file to be ingested.
        user (str): Identifier for the user initiating the ingestion.

    Returns:
        dict: Information about the completed ingestion task, including input parameters and a "limited" flag.
    """
    # directory = 'inputs' or 'temp'
    # formats = [".rst", ".md"]
    input_files = None
    recursive = True
    limit = None
    exclude = True
    # name_job = 'job1'
    # filename = 'install.rst'
    # user = 'local'
    sample = False
    token_check = True
    min_tokens = 150
    max_tokens = 1250
    recursion_depth = 2
    full_path = os.path.join(directory, user, name_job)
    import sys

    print(full_path, file=sys.stderr)
    # check if API_URL env variable is set
    file_data = {"name": name_job, "file": filename, "user": user}
    response = requests.get(
        urljoin(settings.API_URL, "/api/download"), params=file_data
    )
    # check if file is in the response
    print(response, file=sys.stderr)
    file = response.content

    if not os.path.exists(full_path):
        os.makedirs(full_path)
    with open(os.path.join(full_path, filename), "wb") as f:
        f.write(file)

    # check if file is .zip and extract it
    if filename.endswith(".zip"):
        extract_zip_recursive(
            os.path.join(full_path, filename), full_path, 0, recursion_depth
        )

    self.update_state(state="PROGRESS", meta={"current": 1})

    raw_docs = SimpleDirectoryReader(
        input_dir=full_path,
        input_files=input_files,
        recursive=recursive,
        required_exts=formats,
        num_files_limit=limit,
        exclude_hidden=exclude,
        file_metadata=metadata_from_filename,
    ).load_data()
    raw_docs = group_split(
        documents=raw_docs,
        min_tokens=min_tokens,
        max_tokens=max_tokens,
        token_check=token_check,
    )

    docs = [Document.to_langchain_format(raw_doc) for raw_doc in raw_docs]

    call_openai_api(docs, full_path, self)
    tokens = count_tokens_docs(docs)
    self.update_state(state="PROGRESS", meta={"current": 100})

    if sample:
        for i in range(min(5, len(raw_docs))):
            print(raw_docs[i].text)

    # get files from outputs/inputs/index.faiss and outputs/inputs/index.pkl
    # and send them to the server (provide user and name in form)
    file_data = {"name": name_job, "user": user, "tokens":tokens}
    if settings.VECTOR_STORE == "faiss":
        files = {
            "file_faiss": open(full_path + "/index.faiss", "rb"),
            "file_pkl": open(full_path + "/index.pkl", "rb"),
        }
        response = requests.post(
            urljoin(settings.API_URL, "/api/upload_index"), files=files, data=file_data
        )
        response = requests.get(
            urljoin(settings.API_URL, "/api/delete_old?path=" + full_path)
        )
    else:
        response = requests.post(
            urljoin(settings.API_URL, "/api/upload_index"), data=file_data
        )

    # delete local
    shutil.rmtree(full_path)

    return {
        "directory": directory,
        "formats": formats,
        "name_job": name_job,
        "filename": filename,
        "user": user,
        "limited": False,
    }


def remote_worker(self, source_data, name_job, user, loader, directory="temp"):
    token_check = True
    min_tokens = 150
    max_tokens = 1250
    full_path = directory + "/" + user + "/" + name_job

    if not os.path.exists(full_path):
        os.makedirs(full_path)
    self.update_state(state="PROGRESS", meta={"current": 1})

    remote_loader = RemoteCreator.create_loader(loader)
    raw_docs = remote_loader.load_data(source_data)

    docs = group_split(
        documents=raw_docs,
        min_tokens=min_tokens,
        max_tokens=max_tokens,
        token_check=token_check,
    )
    # docs = [Document.to_langchain_format(raw_doc) for raw_doc in raw_docs]
    call_openai_api(docs, full_path, self)
    tokens = count_tokens_docs(docs)
    self.update_state(state="PROGRESS", meta={"current": 100})

    # Proceed with uploading and cleaning as in the original function
    file_data = {"name": name_job, "user": user, "tokens":tokens}
    if settings.VECTOR_STORE == "faiss":
        files = {
            "file_faiss": open(full_path + "/index.faiss", "rb"),
            "file_pkl": open(full_path + "/index.pkl", "rb"),
        }
        
        requests.post(
            urljoin(settings.API_URL, "/api/upload_index"), files=files, data=file_data
        )
        requests.get(urljoin(settings.API_URL, "/api/delete_old?path=" + full_path))
    else:
        requests.post(urljoin(settings.API_URL, "/api/upload_index"), data=file_data)

    shutil.rmtree(full_path)

    return {"urls": source_data, "name_job": name_job, "user": user, "limited": False}


def count_tokens_docs(docs):
    # Here we convert the docs list to a string and calculate the number of tokens the string represents.
    # docs_content = (" ".join(docs))
    docs_content = ""
    for doc in docs:
        docs_content += doc.page_content

    tokens, total_price = num_tokens_from_string(
        string=docs_content, encoding_name="cl100k_base"
    )
    # Here we print the number of tokens and the approx user cost with some visually appealing formatting.
    return tokens


def num_tokens_from_string(string: str, encoding_name: str) -> int:
    # Function to convert string to tokens and estimate user cost.
    encoding = tiktoken.get_encoding(encoding_name)
    num_tokens = len(encoding.encode(string))
    total_price = (num_tokens / 1000) * 0.0004
    return num_tokens, total_price