"""
Common methods used by the API sample scripts.
"""

import json
import logging
import sys
from urllib.error import HTTPError
from urllib.request import (
    Request,
    urlopen,
)

log = logging.getLogger(__name__)


def make_url(api_key, url, args=None):
    """
    Adds the API Key to the URL if it's not already there.
    """
    if args is None:
        args = []
    argsep = "&"
    if "?" not in url:
        argsep = "?"
    if "?key=" not in url and "&key=" not in url:
        args.insert(0, ("key", api_key))
    return url + argsep + "&".join("=".join(t) for t in args)


def get(api_key, url):
    """
    Do the actual GET.
    """
    url = make_url(api_key, url)
    try:
        return json.loads(urlopen(url).read())
    except ValueError as e:
        print(f"URL did not return JSON data: {e}")
        sys.exit(1)


def post(api_key, url, data):
    """
    Do the actual POST.
    """
    url = make_url(api_key, url)
    req = Request(url, headers={"Content-Type": "application/json"}, data=json.dumps(data))
    return json.loads(urlopen(req).read())


def put(api_key, url, data):
    """
    Do the actual PUT
    """
    url = make_url(api_key, url)
    req = Request(url, headers={"Content-Type": "application/json"}, data=json.dumps(data))
    req.get_method = lambda: "PUT"
    return json.loads(urlopen(req).read())


def __del(api_key, url, data):
    """
    Do the actual DELETE
    """
    url = make_url(api_key, url)
    req = Request(url, headers={"Content-Type": "application/json"}, data=json.dumps(data))
    req.get_method = lambda: "DELETE"
    return json.loads(urlopen(req).read())


def display(api_key, url, return_formatted=True):
    """
    Sends an API GET request and acts as a generic formatter for the JSON response.
    """
    try:
        r = get(api_key, url)
    except HTTPError as e:
        print(e)
        print(e.read(1024))  # Only return the first 1K of errors.
        sys.exit(1)
    if not return_formatted:
        return r
    elif isinstance(r, list):
        # Response is a collection as defined in the REST style.
        print("Collection Members")
        print("------------------")
        for n, i in enumerate(r):
            if isinstance(i, str):
                print(f"  {i}")
            else:
                # All collection members should have a name in the response.
                # url is optional
                if "url" in i:
                    print("#{}: {}".format(n + 1, i.pop("url")))
                if "name" in i:
                    print(f"  name: {i.pop('name')}")
                try:
                    for k, v in i.items():
                        print(f"  {k}: {v}")
                except AttributeError:
                    for item in i:
                        print(item)
        print("")
        print(f"{len(r)} element(s) in collection")
    elif isinstance(r, dict):
        # Response is an element as defined in the REST style.
        print("Member Information")
        print("------------------")
        for k, v in r.items():
            print(f"{k}: {v}")
    elif isinstance(r, str):
        print(r)
    else:
        print(f"response is unknown type: {type(r)}")


def submit(api_key, url, data, return_formatted=True):
    """
    Sends an API POST request and acts as a generic formatter for the JSON response.
    'data' will become the JSON payload read by Galaxy.
    """
    try:
        r = post(api_key, url, data)
    except HTTPError as e:
        if return_formatted:
            print(e)
            print(e.read(1024))
            sys.exit(1)
        else:
            return "Error. " + str(e.read(1024))
    if not return_formatted:
        return r
    print("Response")
    print("--------")
    if isinstance(r, list):
        # Currently the only implemented responses are lists of dicts, because
        # submission creates some number of collection elements.
        for i in r:
            if isinstance(i, dict):
                if "url" in i:
                    print(i.pop("url"))
                else:
                    print("----")
                if "name" in i:
                    print(f"  name: {i.pop('name')}")
                for k, v in i.items():
                    print(f"  {k}: {v}")
            else:
                print(i)
    else:
        print(r)


def update(api_key, url, data, return_formatted=True):
    """
    Sends an API PUT request and acts as a generic formatter for the JSON response.
    'data' will become the JSON payload read by Galaxy.
    """
    try:
        r = put(api_key, url, data)
    except HTTPError as e:
        if return_formatted:
            print(e)
            print(e.read(1024))
            sys.exit(1)
        else:
            return "Error. " + str(e.read(1024))
    if not return_formatted:
        return r
    print("Response")
    print("--------")
    print(r)


def delete(api_key, url, data, return_formatted=True):
    """
    Sends an API DELETE request and acts as a generic formatter for the JSON response.
    'data' will become the JSON payload read by Galaxy.
    """
    try:
        r = __del(api_key, url, data)
    except HTTPError as e:
        if return_formatted:
            print(e)
            print(e.read(1024))
            sys.exit(1)
        else:
            return "Error. " + str(e.read(1024))
    if not return_formatted:
        return r
    print("Response")
    print("--------")
    print(r)