import cPickle as pickle

import string

import sys

import time

from itertools import izip

import numpy as np

from datetime import datetime, timedelta

import utils

import logger

import buffering

from configuration import config, set_configuration

import pathfinder

import utils_plots

import data_iterators

import data_transforms

import matplotlib

matplotlib.use('Agg')

import matplotlib.pyplot as plt

train_valid_ids = utils.load_pkl(pathfinder.LUNA_VALIDATION_SPLIT_PATH)

train_pids, valid_pids = train_valid_ids['train'], train_valid_ids['valid']

all_pids = train_pids + valid_pids

data_iterator = data_iterators.LunaSimpleDataGenerator(data_path=pathfinder.LUNA_DATA_PATH, patient_ids=all_pids)

histograms = {}

# bins = np.arange(-960,1700,40)

# avg_histogram = np.zeros((bins.shape[0]-1), dtype=np.int64)

# use buffering.buffered_gen_threaded()

for idx, (x, pid) in enumerate(data_iterator.generate()):

    print idx, 'pid', pid

    # if (idx == 10):

    #     break

    histograms[pid]= data_transforms.get_rescale_params_hist_eq(x)

#plot avg histogram

# width = 0.7 * (bins[1] - bins[0])

# center = (bins[:-1] + bins[1:]) / 2

# plt.bar(center, avg_histogram, align='center', width=width)

# plt.savefig('dsb_histogram_avg.jpg')

# plt.clf()

pickle.dump(histograms, open( "luna_rescale_params_hist_eq.pkl", "wb" ) )