#!/usr/bin/env python3

from __future__ import annotations

import logging

from importlib.metadata import version
from pathlib import PurePosixPath
from typing import Any
from urllib.parse import urljoin, urlparse

import requests


def enable_full_debug() -> None:
    import http.client as http_client
    http_client.HTTPConnection.debuglevel = 1
    logging.basicConfig()
    logging.getLogger().setLevel(logging.DEBUG)
    requests_log = logging.getLogger("requests.packages.urllib3")
    requests_log.setLevel(logging.DEBUG)
    requests_log.propagate = True


class PyVulnerabilityLookup():

    def __init__(self, root_url: str, useragent: str | None=None, token: str | None=None,
                 *, proxies: dict[str, str] | None=None) -> None:
        '''Query a specific instance.

        :param root_url: URL of the instance to query.
        :param useragent: The User Agent used by requests to run the HTTP requests against the vulnerability lookup instance
        :param proxies: The proxies to use to connect to the vulnerability lookup instance - More details: https://requests.readthedocs.io/en/latest/user/advanced/#proxies
        '''
        self.root_url = root_url

        if not urlparse(self.root_url).scheme:
            self.root_url = 'http://' + self.root_url
        if not self.root_url.endswith('/'):
            self.root_url += '/'
        self.session = requests.session()
        self.session.headers['user-agent'] = useragent if useragent else f'PyVulnerabilityLookup / {version("pyvulnerabilitylookup")}'
        self.session.headers['X-API-KEY'] = token if token else ''
        self.session.headers['Accept'] = 'application/json'
        self.session.headers['Content-Type'] = 'application/json'
        if proxies:
            self.session.proxies.update(proxies)

    def set_apikey(self, apikey: str) -> None:
        '''Set the API key to use for the requests'''
        self.session.headers['X-API-KEY'] = apikey

    @property
    def is_up(self) -> bool:
        '''Test if the given instance is accessible'''
        try:
            r = self.session.head(self.root_url)
        except requests.exceptions.ConnectionError:
            return False
        return r.status_code == 200

    def redis_up(self) -> bool:
        '''Check if redis is up and running'''
        r = self.session.get(urljoin(self.root_url, 'redis_up'))
        return r.json()

    def get_vulnerability(self, vulnerability_id: str) -> dict[str, Any]:
        '''Get a vulnerability

        :param vulnerability_id: The ID of the vulnerability to get (can be from any source, as long as it is a valid ID)
        '''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('vulnerability', vulnerability_id))))
        return r.json()

    def create_vulnerability(self, vulnerability: dict[str, Any]) -> dict[str, Any]:
        '''Create a vulnerability.

        :param vulnerability: The vulnerability
        '''
        r = self.session.post(urljoin(self.root_url, str(PurePosixPath('vulnerability'))),
                              json=vulnerability)
        return r.json()

    def delete_vulnerability(self, vulnerability_id: str) -> int:
        '''Delete a vulnerability.

        :param vulnerability_id: The vulnerability ID
        '''
        r = self.session.delete(urljoin(self.root_url, str(PurePosixPath('vulnerability', vulnerability_id))))
        return r.status_code

    def get_info(self) -> dict[str, Any]:
        '''Get more information about the current databases in use and when it was updated'''
        r = self.session.get(urljoin(self.root_url, 'info'))
        return r.json()

    def get_config_info(self) -> dict[str, Any]:
        '''Get more information about the current databases in use and when it was updated'''
        r = self.session.get(urljoin(self.root_url, 'configInfo'))
        return r.json()

    def get_last(self, number: int | None=None, source: str | None = None) -> list[dict[str, Any]]:
        '''Get the last vulnerabilities

        :param number: The number of vulnerabilities to get
        :param source: The source of the vulnerabilities
        '''
        path = PurePosixPath('last')
        if source:
            path /= source
        if number is not None:
            path /= str(number)
        r = self.session.get(urljoin(self.root_url, str(path)))
        return r.json()

    def get_vendors(self) -> list[str]:
        '''Get the list of known vendors'''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('api', 'browse'))))
        return r.json()

    def get_vendor_products(self, vendor: str) -> list[str]:
        '''Get the known products for a vendor

        :params vendor: A vendor owning products (must be in the known vendor list)
        '''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('api', 'browse', vendor))))
        return r.json()

    def get_vendor_product_vulnerabilities(self, vendor: str, product: str) -> list[str]:
        '''Get the the vulnerabilities per vendor and a specific product

        :param vendor: A vendor owning products (must be in the known vendor list)
        :param product: A product owned by that vendor
        '''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('api', 'search', vendor, product))))
        return r.json()

    # NOTE: endpoints /api/cve/*, /api/dbInfo, /api/last are alises for backward compat.

    def create_comment(self, comment: dict[str, Any]) -> dict[str, Any]:
        '''Create a comment.

        :param comment: The comment
        '''
        r = self.session.post(urljoin(self.root_url, str(PurePosixPath('api', 'comment'))),
                              json=comment)
        return r.json()

    def get_comments(self, uuid: str | None = None, vuln_id: str | None = None,
                     author: str | None = None) -> dict[str, Any]:
        '''Get comment(s)

        :param uuid: The UUID of a specific comment
        :param vuln_id: The vulnerability ID to get comments of
        :param author: The author of the comment(s)
        '''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('api', 'comment'))),
                             params={'uuid': uuid, 'vuln_id': vuln_id, 'author': author})
        return r.json()

    def delete_comment(self, comment_uuid: str) -> int:
        '''Delete a comment.

        :param comment_uuid: The comment UUID
        '''
        r = self.session.delete(urljoin(self.root_url, str(PurePosixPath('api', 'comment', comment_uuid))))
        return r.status_code

    def create_bundle(self, bundle: dict[str, Any]) -> dict[str, Any]:
        '''Create a bundle.

        :param bundle: The bundle
        '''
        r = self.session.post(urljoin(self.root_url, str(PurePosixPath('api', 'bundle'))),
                              json=bundle)
        return r.json()

    def get_bundles(self, uuid: str | None = None, vuln_id: str | None = None,
                    author: str | None = None) -> dict[str, Any]:
        '''Get bundle(s)

        :param uuid: The UUID a specific bundle
        :param vuln_id: The vulnerability ID to get bundles of
        :param author: The author of the bundle(s)
        '''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('api', 'bundle'))),
                             params={'uuid': uuid, 'vuln_id': vuln_id, 'author': author})
        return r.json()

    def delete_bundle(self, bundle_uuid: str) -> int:
        '''Delete a bundle.

        :param bundle_uuid: The bundle UUID
        '''
        r = self.session.delete(urljoin(self.root_url, str(PurePosixPath('api', 'bundle', bundle_uuid))))
        return r.status_code

    def create_user(self, login: str, name: str, organisation: str, email: str) -> dict[str, Any]:
        '''Create a user.

        :param login: The login of the user
        :param name: The name of the user
        :param organisation: The organisation of the user
        :param email: The email of the user
        '''
        r = self.session.post(urljoin(self.root_url, str(PurePosixPath('api', 'user'))),
                              json={'login': login, 'name': name, 'organisation': organisation, 'email': email})
        return r.json()

    def list_users(self) -> dict[str, Any]:
        '''List users'''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('api', 'user'))))
        return r.json()

    def get_user_information(self) -> dict[str, Any]:
        '''Get user information'''
        r = self.session.get(urljoin(self.root_url, str(PurePosixPath('api', 'user', 'me'))))
        return r.json()