# -*- coding: utf-8 -*-

"""Test API

Utilisation :
    créer les variables d'environnement: (indiquer les valeurs
    pour le serveur ScoDoc que vous voulez interroger)

    export SCODOC_URL="https://scodoc.xxx.net/"
    export API_USER="xxx"
    export SCODOC_PASSWD="xxx"
    export CHECK_CERTIFICATE=0 # ou 1 si serveur de production avec certif SSL valide

    (on peut aussi placer ces valeurs dans un fichier .env du répertoire tests/api).
"""
import os
import requests

try:
    from dotenv import load_dotenv
except ModuleNotFoundError:
    print("\nWarning: dotenv not installed, ignoring .env")
    print("You may install it using:\npip install python-dotenv\n")
    load_dotenv = None
try:
    import pytest
except ModuleNotFoundError:
    print("pytest not installed\n")
    pytest = None

# --- Lecture configuration (variables d'env ou .env)
try:
    BASEDIR = os.path.abspath(os.path.dirname(__file__))
except NameError:
    BASEDIR = "/opt/scodoc/tests/api"

if load_dotenv:
    load_dotenv(os.path.join(BASEDIR, ".env"))

CHECK_CERTIFICATE = bool(os.environ.get("CHECK_CERTIFICATE", False))
SCODOC_URL = os.environ.get("SCODOC_URL") or "http://localhost:5000"
API_URL = SCODOC_URL + "/ScoDoc/api"
API_USER = os.environ.get("API_USER", "test")
API_PASSWORD = os.environ.get("API_PASSWORD", os.environ.get("API_PASSWD", "test"))
API_USER_ADMIN = os.environ.get("API_USER_ADMIN", "admin_api")
API_PASSWORD_ADMIN = os.environ.get("API_PASSWD_ADMIN", "admin_api")
DEPT_ACRONYM = "TAPI"
SCO_TEST_API_TIMEOUT = 5
print(f"SCODOC_URL={SCODOC_URL}")
print(f"API URL={API_URL}")
print(f"API_USER={API_USER}")


class APIError(Exception):
    def __init__(self, message: str = "", payload=None, status_code=None):
        self.message = message
        self.payload = payload or {}
        self.status_code = status_code

    def __str__(self):
        return f"APIError: {self.message} payload={self.payload} status_code={self.status_code}"


def get_auth_headers(user, password) -> dict:
    "Demande de jeton, dict à utiliser dans les en-têtes de requêtes http"
    ans = requests.post(API_URL + "/tokens", auth=(user, password), timeout=5)
    if ans.status_code != 200:
        raise APIError(f"Echec demande jeton par {user}", status_code=ans.status_code)
    token = ans.json()["token"]
    return {"Authorization": f"Bearer {token}"}


if pytest:

    @pytest.fixture
    def api_headers() -> dict:
        """Jeton, utilisateur API ordinaire"""
        return get_auth_headers(API_USER, API_PASSWORD)

    @pytest.fixture
    def api_admin_headers() -> dict:
        """Jeton, utilisateur API SuperAdmin"""
        return get_auth_headers(API_USER_ADMIN, API_PASSWORD_ADMIN)


class _DefaultHeaders:
    headers = {}


def set_headers(headers: dict):
    """Set default headers"""
    print(f"set_headers: {headers}")
    _DefaultHeaders.headers = headers


def GET(path: str, headers: dict = None, errmsg=None, dept=None, raw=False):
    """Get and optionaly returns as JSON
    Special case for non json result (image or pdf):
        return Content-Disposition string (inline or attachment)
    If raw, return a requests.Response
    """
    if dept:
        url = SCODOC_URL + f"/ScoDoc/{dept}/api" + path
    else:
        url = API_URL + path
    reply = requests.get(
        url,
        headers=_DefaultHeaders.headers if headers is None else headers,
        verify=CHECK_CERTIFICATE,
        timeout=SCO_TEST_API_TIMEOUT,
    )
    if reply.status_code != 200:
        print("url", url)
        print("reply", reply.text)
        raise APIError(
            errmsg or f"""erreur get {url} !""",
            reply.json(),
            status_code=reply.status_code,
        )
    if raw:
        return reply
    if reply.headers.get("Content-Type", None) == "application/json":
        return reply.json()  # decode la reponse JSON
    if reply.headers.get("Content-Type", None) in [
        "image/jpg",
        "image/png",
        "application/pdf",
    ]:
        retval = {
            "Content-Type": reply.headers.get("Content-Type", None),
            "Content-Disposition": reply.headers.get("Content-Disposition", None),
        }
        return retval
    raise APIError(
        "Unknown returned content {r.headers.get('Content-Type', None} !\n",
        status_code=reply.status_code,
    )


def POST(
    path: str,
    data: dict = None,
    headers: dict = None,
    errmsg=None,
    dept=None,
    raw=False,
):
    """Post
    Decode réponse en json, sauf si raw.
    """
    data = data or {}
    if dept:
        url = SCODOC_URL + f"/ScoDoc/{dept}/api" + path
    else:
        url = API_URL + path
    r = requests.post(
        url,
        json=data,
        headers=_DefaultHeaders.headers if headers is None else headers,
        verify=CHECK_CERTIFICATE,
        timeout=SCO_TEST_API_TIMEOUT,
    )
    if r.status_code != 200:
        try:
            payload = r.json()
        except requests.exceptions.JSONDecodeError:
            payload = r.text
        raise APIError(
            errmsg or f"erreur url={url} status={r.status_code} !",
            payload=payload,
            status_code=r.status_code,
        )
    return r if raw else r.json()  # decode la reponse JSON


def check_fields(data: dict, fields: dict = None):
    """
    Vérifie que le dictionnaire data contient les bonnes clés
    et les bons types de valeurs.

    Args:
        data (dict): un dictionnaire (json de retour de l'api)
        fields (dict, optional): Un dictionnaire représentant les clés et les types d'une réponse.
    """
    assert set(data.keys()) == set(fields.keys())
    for key in data:
        if key in ("moduleimpl_id", "desc", "external_data"):
            assert (
                isinstance(data[key], fields[key]) or data[key] is None
            ), f"error [{key}:{type(data[key])}, {data[key]}, {fields[key]}]"
        else:
            assert isinstance(
                data[key], fields[key]
            ), f"error [{key}:{type(data[key])}, {data[key]}, {fields[key]}]"


def check_failure_get(path: str, headers: dict, err: str = None):
    """
    Vérifie que la requête GET renvoie bien un 404

    Args:
        path (str): la route de l'api
        headers (dict): le token d'auth de l'api
        err (str, optional): L'erreur qui est sensée être fournie par l'api.

    Raises:
        APIError: Une erreur car la requête a fonctionné (mauvais comportement)
    """

    try:
        GET(path=path, headers=headers, dept=DEPT_ACRONYM)
        # ^ Renvoi un 404
    except APIError as api_err:
        if err is not None:
            assert api_err.payload["message"] == err
    else:
        raise APIError("Le GET n'aurait pas du fonctionner")


def check_failure_post(path: str, headers: dict, data: dict, err: str = None):
    """
    Vérifie que la requête POST renvoie bien un 404

    Args:
        path (str): la route de l'api
        headers (dict): le token d'auth
        data (dict): un dictionnaire (json) à envoyer
        err (str, optional): L'erreur qui est sensée être fournie par l'api.

    Raises:
        APIError: Une erreur car la requête a fonctionné (mauvais comportement)
    """

    try:
        data = POST(path=path, headers=headers, data=data, dept=DEPT_ACRONYM)
        # ^ Renvoie un 404
    except APIError as api_err:
        if err is not None:
            assert (
                api_err.payload["message"] == err
            ), f"received: {api_err.payload['message']}"
    else:
        raise APIError("Le GET n'aurait pas du fonctionner")