import mwapi
from revscoring import Model
import articlequality
import pyarrow
import pandas as pd
import scoring_utils
from itertools import chain, zip_longest
from multiprocessing import Pool
from functools import partial
from pyRemembeR import Remember
import fire
from pathlib import Path
import tqdm
remember = Remember("score_sample_articles.RDS")

def get_revision_text(revid_batch, api):
    revid_batch = filter(lambda rid: rid is not None, revid_batch)
    doc = api.get(action='query',
                  prop='revisions',
                  revids=revid_batch,
                  rvprop=['ids','content'],
                  rvslots=['main'])
    pages = doc.get('query',{}).get('pages',{})
    for pageid, doc in pages.items():
        revisions = doc.get('revisions',[])
        for revision in revisions:
            text = revision.get('slots',{}).get('main',{}).get('*',{})
            yield {'revid':revision.get('revid',{}), 'text':text}

def grouper(n, iterable, fillvalue=None):
    "grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx"
    args = [iter(iterable)] * n
    return zip_longest(fillvalue=fillvalue, *args)
    
def pull_revision_texts(revids, api, api_batch_size):
    batches = grouper(api_batch_size,revids)
    get_revision_text_2 = partial(get_revision_text,api=api)
    revs = chain(* map(get_revision_text_2, batches))
    yield from revs

def score_revisions(revids, api, api_batch_size=50, parallel=True):

    revs = pull_revision_texts(revids, api, api_batch_size)

    ncores = 28
    pool = Pool(ncores)
    scorer_model = Model.load(open('articlequality/models/enwiki.nettrom_wp10.gradient_boosting.model', 'rb'))
    add_score = partial(scoring_utils.add_score, scorer_model=scorer_model)

    if parallel:
        ncores = 48
        pool = Pool(ncores)

        revs = pool.imap_unordered(add_score, revs, chunksize = api_batch_size*4)
    else:
        revs = map(add_score,revs)

    to_pddict = partial(scoring_utils.to_pddict,kept_keys=['revid'])
    revs = map(to_pddict, revs)
    yield from revs

#sample_file_parquet = "data/article_sample_set.parquet"; output_feather="data/scored_article_sample.feather";

sample_file="/data/nti9383home/production_functions/data/20200301_article_labelings_sample.feather";output="/data/nti9383home/production_functions/data/scored_article_sample.feather"

def score_sample(sample_file = "data/article_sample_set.feather", output="data/scored_article_sample.feather"):
    
    sample = pd.read_feather(sample_file)

    revids = set(sample.revid)
    user_agent = "Nate TeBlunthuis <nathante@uw.edu>. What's the relationship between contributors and article quality?"
    api = mwapi.Session("https://en.wikipedia.org",user_agent=user_agent)

    scores = tqdm.tqdm(score_revisions(revids, api, 50, True),total=len(revids),miniters=100,smoothing=0.2)

    p = Path(output)
    output_csv =  Path(str(p).replace("".join(p.suffixes), ".csv"))
    output_json =  Path(str(p).replace("".join(p.suffixes), ".json"))
    output_feather =  Path(str(p).replace("".join(p.suffixes), ".feather"))

    saved_scores = list()
    with open(output_json,'w') as of:
        for score in scores:
            of.write(str(score) + '\n')
            saved_scores.append(score)


    scored_revids = pd.DataFrame(saved_scores)
    sample_1 = sample.merge(scored_revids,left_on="revid",right_on="revid")
    remember(sample_1.shape[0],"sample_size_unscored")

    remember(sample_1.shape[0],"sample_size_scored")
    sample_1.to_feather(output_feather)
    sample_1.to_csv(output_csv)

if __name__ == "__main__":
    fire.Fire(score_sample)