import csv
from io import StringIO

import requests

BASE_URL = "https://api.membershipworks.com"

# extracted from `SF._is.crm` in https://cdn.membershipworks.com/all.js
CRM = {
    0: "Note",
    4: "Profile Updated",
    8: "Scheduled/Reminder Email",
    9: "Renewal Notice",
    10: "Join Date",
    11: "Next Renewal Date",
    12: "Membership Payment",
    13: "Donation",
    14: "Event Activity",
    15: "Conversation",
    16: "Contact Change",
    17: "Label Change",
    18: "Other Payment",
    19: "Cart Payment",
    20: "Payment Failed",
    21: "Billing Updated",
    22: "Form Checkout",
    23: "Event Payment",
    24: "Invoice",
    25: "Invoice Payment",
    26: "Renewal",
    27: "Payment",
}

# Types of fields, extracted from a html snippet in all.js + some guessing
typ = {
    1: "Text input",
    2: "Password",  # inferred from data
    3: "Simple text area",
    4: "Rich text area",
    7: "Address",
    8: "Check box",
    9: "Select",
    11: "Display value stored in field (ie. read only)",
    12: "Required waiver/terms",
}

# more constants, this time extracted from the members csv export in all.js
staticFlags = {
    "pos": {"lbl": "Position/relation (contacts)"},
    "nte": {"lbl": "Admin note (contacts)"},
    "pwd": {"lbl": "Password"},
    "lgo": {"lbl": "Business card image URLs"},
    "pfx": {"lbl": "Profile gallery image URLs"},
    "lvl": {"lbl": "Membership levels"},
    "aon": {"lbl": "Membership add-ons"},
    "lbl": {"lbl": "Labels"},
    "joi": {"lbl": "Join date"},
    "end": {"lbl": "Renewal date"},
    "spy": {"lbl": "Billing method"},
    "rid": {"lbl": "Auto recurring billing ID"},
    "ipa": {"lbl": "IP address"},
    "_id": {"lbl": "Account ID"},
}


class MembershipWorksRemoteError(Exception):
    def __init__(self, reason, r):
        super().__init__(
            f"Error when attempting {reason}: {r.status_code} {r.reason}\n{r.text}"
        )


class MembershipWorks:
    def __init__(self):
        self.sess = requests.Session()
        self.org_info = None
        self.auth_token = None
        self.org_num = None

    def login(self, username, password):
        """Authenticate against the membershipworks api"""
        r = self.sess.post(
            BASE_URL + "/v2/account/session",
            data={"eml": username, "pwd": password},
            headers={"X-Org": "10000"},
        )
        if r.status_code != 200 or "SF" not in r.json():
            raise MembershipWorksRemoteError("login", r)
        self.org_info = r.json()
        self.auth_token = self.org_info["SF"]
        self.org_num = self.org_info["org"]
        self.sess.headers.update(
            {
                "X-Org": str(self.org_num),
                "X-Role": "admin",
                "Authorization": "Bearer " + self.auth_token,
            }
        )

    def _inject_auth(self, kwargs):
        # TODO: should probably be a decorator or something
        if self.auth_token is None:
            raise RuntimeError("Not Logged in to MembershipWorks")
        # add auth token to params
        if "params" not in kwargs:
            kwargs["params"] = {}
        kwargs["params"]["SF"] = self.auth_token

    def _get_v1(self, *args, **kwargs):
        self._inject_auth(kwargs)
        # TODO: should probably do some error handling in here
        return requests.get(*args, **kwargs)

    def _post_v1(self, *args, **kwargs):
        self._inject_auth(kwargs)
        # TODO: should probably do some error handling in here
        return requests.post(*args, **kwargs)

    def _all_fields(self):
        """Parse out a list of fields from the org data.

        Is this terrible? Yes. Also, not dissimilar to how MW does it
        in all.js.
        """
        fields = staticFlags.copy()

        # TODO: this will take the later option, if the same field
        # used in mulitple places. I don't know which lbl is used for
        # csv export

        # anm: member signup, acc: member manage, adm: admin manage
        for screen_type in ["anm", "acc", "adm"]:
            for box in self.org_info["tpl"][screen_type]:
                for element in box["box"]:
                    if type(element["dat"]) != str:
                        for field in element["dat"]:
                            if "_id" in field:
                                if field["_id"] not in fields:
                                    fields[field["_id"]] = field

        return fields

    def _parse_flags(self):
        """Parse the flags out of the org data.

        This is terrible, and there might be a better way to do this.
        """
        ret = {"folders": {}, "levels": {}, "addons": {}, "labels": {}}

        for dek in self.org_info["dek"]:
            # TODO: there must be a better way. this is stupid
            if dek["dek"] == 1:
                ret["folders"][dek["lbl"]] = dek["did"]
            elif "cur" in dek:
                ret["levels"][dek["lbl"]] = dek["did"]
            elif "mux" in dek:
                ret["addons"][dek["lbl"]] = dek["did"]
            else:
                ret["labels"][dek["lbl"]] = dek["did"]

        return ret

    def get_member_ids(self, folders):
        folder_map = self._parse_flags()["folders"]

        r = self.sess.get(
            BASE_URL + "/v2/accounts",
            params={"dek": ",".join([folder_map[f] for f in folders])},
        )
        if r.status_code != 200 or "usr" not in r.json():
            raise MembershipWorksRemoteError("user listing", r)

        # get list of member ID matching the search
        # dedup with set() to work around people with alt uids
        # TODO: figure out why people have alt uids
        return set(user["uid"] for user in r.json()["usr"])

    # TODO: has issues with aliasing header names:
    #       ex: "Personal Studio Space" Label vs Membership Addon/Field
    def get_members(self, folders, columns):
        """Pull the members csv from the membershipworks api
        folders: a list of the names of the folders to get
                 (see folder_map in this function for mapping to ids)
        columns: which columns to get"""
        ids = self.get_member_ids(folders)

        # get members CSV
        # TODO: maybe can just use previous get instead? would return JSON
        r = self._post_v1(
            BASE_URL + "/v1/csv",
            data={
                "_rt": "946702800",  # unknown
                "mux": "",  # unknown
                "tid": ",".join(ids),  # ids of members to get
                "var": columns,
            },
        )
        if r.status_code != 200:
            raise MembershipWorksRemoteError("csv generation", r)
        return list(csv.DictReader(StringIO(r.text)))

    def get_transactions(self, start_date, end_date, json=False):
        """Get the transactions between start_date and end_date

        Dates can be datetime.date or datetime.datetime

        json gets a different version of the transactions list,
        which contains a different set information
        """
        r = self._get_v1(
            BASE_URL + "/v1/csv",
            params={
                "crm": ",".join(str(k) for k in CRM.keys()),
                **({"txl": ""} if json else {}),
                "sdp": start_date.strftime("%s"),
                "edp": end_date.strftime("%s"),
            },
        )
        if r.status_code != 200:
            raise MembershipWorksRemoteError("csv generation", r)
        if json:
            return r.json()
        else:
            return list(csv.DictReader(StringIO(r.text)))

    def get_all_members(self):
        """Get all the data for all the members"""
        folders = self._parse_flags()["folders"].keys()
        fields = self._all_fields()
        members = self.get_members(folders, ",".join(fields.keys()))
        return members