import requests
from pathlib import Path
from typing import Set
import pytest

import toml
from pip._internal.req import parse_requirements


def get_parsed_requirements(requirements_file: str) -> Set:
    """
    Returns a set of requirements that are defined in `requirements_file`,
    without versions
    """
    requirements_set = set()
    ignore_list = [
        "paddlenlp",
        "paddle2onnx",
        "paddlepaddle",
    ]  # temporary ignore paddle
    parsed_requirements = parse_requirements(requirements_file, session=False)
    separators = ("=", "<", ">", "[")
    for req in parsed_requirements:
        requirement = req.requirement
        # requirements for Windows or macOS only
        if ";" in requirement and "linux" not in requirement:
            continue
        if requirement.startswith("git+"):
            requirement = requirement.split("#egg=")[-1]
        for separator in separators:
            requirement = requirement.replace(separator, "|")
        reqname = requirement.split("|")[0]
        if reqname not in ignore_list:
            requirements_set.add(reqname)

    return requirements_set


def test_readme():
    """
    Test that all notebooks have a README file
    """
    for item in Path("notebooks").iterdir():
        if item.is_dir():
            # item is a notebook directory
            notebook_dir = item.relative_to(Path("notebooks"))
            if str(notebook_dir)[0].isdigit():
                assert "README.md" in [filename.name for filename in item.iterdir()], f"README not found in {item}"


def test_requirements_docker():
    """
    Test that requirements.txt is a subset of Docker requirements in Pipfile
    This test does not check requirements versions, it only verifies existence
    """
    with open(".docker/Pipfile") as f:
        pipfile_contents = toml.load(f)
        docker_requirements = set(list(pipfile_contents["packages"].keys()))

    pip_requirements = get_parsed_requirements("requirements.txt")
    assert pip_requirements.issubset(docker_requirements), f"Docker Pipfile misses: {pip_requirements.difference(docker_requirements)}"


def test_requirements_binder():
    """
    Test that requirements.txt is a subset of Binder requirements
    This test does not check requirements versions, it only verifies existence
    """
    pip_requirements = get_parsed_requirements("requirements.txt")
    binder_requirements = get_parsed_requirements(".binder/requirements.txt")
    assert pip_requirements.issubset(binder_requirements), f"Binder requirements misses: {pip_requirements.difference(binder_requirements)}"


@pytest.mark.skip(reason="URL existence is tested in docker_treon")
def test_urls_exist():
    """
    Test that urls that may be cached still exist on the server
    """
    urls = [
        "http://cs231n.stanford.edu/tiny-imagenet-200.zip",
        "https://github.com/onnx/models/raw/main/vision/style_transfer/fast_neural_style/model/pointilism-9.onnx",
        "https://storage.openvinotoolkit.org/data/test_data/openvino_notebooks/kits19/case_00030.zip",
    ]
    headers = {"User-Agent": "Mozilla/5.0"}
    for url in urls:
        response = requests.get(url=url, headers=headers)
        if not response.status_code == 200:
            print(f"Downloading {url} failed")
            raise