"""
Stackexchange data (uses [[https://stackoverflow.com/legal/gdpr/request][official GDPR export]])
"""

# TODO need to merge gdpr and stexport

### config
from dataclasses import dataclass

from my.config import stackexchange as user_config
from my.core import Json, PathIsh, get_files, make_config


@dataclass
class stackexchange(user_config):
    gdpr_path: PathIsh  # path to GDPR zip file
config = make_config(stackexchange)
# TODO later support unpacked zip too
###

# TODO just merge all of them and then filter?.. not sure

from collections.abc import Iterable
from datetime import datetime
from typing import NamedTuple

from my.core.compat import fromisoformat


class Vote(NamedTuple):
    j: Json
    # todo ip?

    @property
    def when(self) -> datetime:
        return fromisoformat(self.j['eventTime'])

    # todo Url return type?
    @property
    def link(self) -> str:
        # vote target
        l = f"https://{self.j['siteId']}/"
        t = self.j['target']
        if t == 'Comment':
            # for comments, these work?
            # - https://meta.stackexchange.com/posts/comments/943975
            # - https://meta.stackexchange.com/questions/5436/direct-link-to-a-comment#comment943975_290757
            #                                            ^question id                         ^comment id ^answer id
            # hmm, this loads very raw comments without the rest of the page?
            # - https://meta.stackexchange.com/posts/27319/comments#comment-57475
            #
            # parentPostId is the original quesion
            #    TODO is not always present? fucking hell
            #    seems like there is no way to get a hierarchical comment link.. guess this needs to be handled in Promnesia normalisation...
            # postId is the answer
            l += f"posts/comments/{self.j['commentId']}"
        elif t == 'Post':
            # https://unix.stackexchange.com/q/14841/180307
            # https://unix.stackexchange.com/a/14871/180307
            # https://unix.stackexchange.com/a/16756/180307
            # shit. links generated by stackexchange are not hierarchical
            # on the other hand seems that it works without the last bit (/180307)
            # ok, 'a' works even for questions
            l += f"a/{self.j['postId']}"
        else:
            raise RuntimeError(f'Unexpected type {t}')
        return l

    # todo expose vote type?

import json

from ..core.error import Res


def votes() -> Iterable[Res[Vote]]:
    # TODO there is also some site specific stuff in qa/ directory.. not sure if its' more detailed
    # todo should be defensive? not sure if present when user has no votes
    path = max(get_files(config.gdpr_path))
    votes_path = path / 'analytics' /  'qa\\vote.submit.json'  # yes, it does contain a backslash...
    j = json.loads(votes_path.read_text(encoding='utf-8-sig'))  # not sure why, but this encoding seems necessary
    for r in reversed(j): # they seem to be in decreasing order by default
        # TODO implement check method that would go through all properties and emit errors?
        yield Vote(r)


from ..core import Stats, stat


def stats() -> Stats:
    return stat(votes)