#!/usr/bin/python

from os import listdir
from os.path import isfile, join

import json
import random
import sys



def tabulate_results():
    print "===="
    print "Number of records processed " + str(jid_count)
    print "===="

    ofd_freq = open(join(output_dir,"genre-tags-freq-10000.csv"), "w")

    print "Generating ..."
    print "  Genre Tags Frequency Distribution"
    print "  (one track can be given assigned multiple genres)"
    
    print >> ofd_freq, "Genre tag,Frequency count"

    for gk in genre_table.keys():
        print >> ofd_freq, "{0:20}".format(gk) + "," + str(genre_table[gk])

    ofd_freq.close();

    ofd_distrib = open(join(output_dir, "genre-tags-distribution-count-10000.csv"), "w")

    print "  Number of Genre Tags Assigned per Track"
    print >> ofd_distrib, "Num of tags,Frequency count"
    for gk in sorted(genre_table_tagcount.keys()):
        print >> ofd_distrib, gk + "," + str(genre_table_tagcount[gk])

    ofd_distrib.close();



def processTagset(jid,tagrec):

    # genres, instruments, vartags

    genres = tagrec[u'genres']
    num_genres = len(genres)

    num_genres_str = str(num_genres)
    if not genre_table_tagcount.has_key(num_genres_str):
        genre_table_tagcount[num_genres_str] = 0
    genre_table_tagcount[num_genres_str] += 1

    for g in genres:
        if not genre_table.has_key(g):
            genre_table[g] = 0
        genre_table[g] += 1

        

argc = len(sys.argv)

input_dir  = sys.argv[1] if (argc==2) or (argc==3)  else "download-json-all"
output_dir = sys.argv[2] if argc==3 else "csv-data"

json_files = [ jf for jf in listdir(input_dir) if isfile(join(input_dir,jf)) ]

jamendo_ids = [];

genre_table = {}
genre_table_tagcount = {}

jid_count = 0

evened_out_json_data=open('jamendo-evened-out-dataset-trackids.json').read()
evened_out_jamendo_ids=json.loads(evened_out_json_data)

evened_out_hashmap = {}
for jid in evened_out_jamendo_ids:
    evened_out_hashmap[jid] = True

print "Evened out dataset size = " + str(len(evened_out_hashmap))

all_hashmap = {}

for jf in json_files:
    print "Processing" + jf

    json_filename = join(input_dir,jf)
    ifd = open(json_filename)
    json_data = ifd.read()
    data = json.loads(json_data)

#    if jid_count>100:
#        break

    for rec in data[u'results']:

        jid = rec[u'id']
        all_hashmap[jid] = True
        
        jid_count += 1
 
        musicinfo = rec[u'musicinfo']
        tags = musicinfo[u'tags']
        if (evened_out_hashmap.get(jid) != None):
            processTagset(jid,tags)
        

    ifd.close()


tabulate_results()

print "Checking for consitency!"

for jid in evened_out_jamendo_ids:
    if all_hashmap.get(jid) == None:
        print "**** Not found in all jid map:" + str(jid)