import os   #compability with windows
from IPython import embed
import numpy as np

def parse_dataset(dataset_name):
    assert(os.path.exists(dataset_name))        #see if data exists
    f = open(dataset_name, 'r')                 #open data we gave in
    lines = f.readlines()                       #read data
    f.close()                                   #?

    # metadata lists for every loop
    eodfs = []
    deltafs = []
    stimulusfs = []

    # data itself
    times = []
    frequencies = []
    amplitudes = []

    # temporary lists with data we put in the lists above
    time = []
    ampl = []
    freq = []

    for i in range(len(lines)):
        l = lines[i].strip()                                        #all lines of textdata, exclude all empty lines (empty () default for spacebar)
        if "#" in l and "EODf" in l:                                #if line starts with # EODf:
            eodfs.append(float(l.split(':')[-1].strip()[:-2]))      #append: line splitted by ':' the 2nd part ([-1],
        if "#" in l and "Delta f" in l:                             #which got striped so we sure there is no space at the end,
            deltafs.append(float(l.split(':')[-1].strip()[:-2]))    #from that all expect the last two signs (Hz unit)
        if "#" in l and "StimulusFrequency" in l:                   #this for different metadata in different lists
            stimulusfs.append(float(l.split(':')[-1].strip()[:-2]))

        if '#Key' in l:
            if len(time) != 0:              #therefore empty in the first round
                times.append(time)          #2nd loop means time != 0, so we put the times/amplitudes/frequencies to
                amplitudes.append(ampl)     #the data of the first loop
                frequencies.append(freq)

            time = []                       #temporary lists to overwrite the lists with the same name we made before
            ampl = []                       #so they are empty again
            freq = []

        if len(l) > 0 and l[0] is not '#':              #line not empty and doesnt start with #
            temporary = list(map(float, l.split()))     #temporary list where we got 3 index splitted by spacebar, map to find them
            time.append(temporary[0])                   #temporary lists with the data at that place, respectively
            freq.append(temporary[1])
            ampl.append(temporary[2])

    times.append(time)          #append data from one list to another
    amplitudes.append(ampl)     #these append the data from the first loop to the final lists, because we overwrite them (?)
    frequencies.append(freq)

    return times, frequencies, amplitudes, eodfs, deltafs, stimulusfs       #output of the function


def mean_noise_cut(frequencies, time, n):
    cutf = []
    cutt = []
    for k in np.arange(0, len(frequencies), n):
        t = time[k]
        f = np.mean(frequencies[k:k+n])
        cutf.append(f)
        cutt.append(t)

    return cutf, cutt


def step_response(t, a1, a2, tau1, tau2):
    r_step = (a1*(1 - np.exp(-t/tau1))) + (a2*(1 - np.exp(-t/tau2)))
    r_step[t<0] = 0
    return r_step


def base_eod(frequencies, time, onset_point):
    base_eod = []

    onset_end = onset_point - 10

    base = np.mean(frequencies[(time >= onset_end) & (time < onset_point)])
    base_eod.append(base)
    return base_eod


def JAR_eod(frequencies, time, offset_point):
    jar_eod = []

    offset_start = offset_point - 10

    jar = np.mean(frequencies[(time >= offset_start) & (time < offset_point)])
    jar_eod.append(jar)

    return jar_eod


def mean_loops(start, stop, timespan, frequencies, time):
    minimumt = min(len(time[0]), len(time[1]))
    # new time with wished timespan because it varies for different loops
    tnew = np.arange(start, stop, timespan / minimumt)  # 3rd input is stepspacing:
                                                        # in case complete measuring time devided by total number of datapoints
    # interpolation
    f0 = np.interp(tnew, time[0], frequencies[0])
    f1 = np.interp(tnew, time[1], frequencies[1])

    #new array with frequencies of both loops as two lists put together
    frequency = np.array([f0, f1])

    #making a mean over both loops with the axis 0 (=averaged in y direction, axis=1 would be over x axis)
    mf = np.mean(frequency, axis=0)
    return mf, tnew


def norm_function(cf_arr, ct_arr, onset_point, offset_point):
    onset_end = onset_point - 10
    offset_start = offset_point - 10

    base = np.mean(cf_arr[(ct_arr >= onset_end) & (ct_arr < onset_point)])

    ground = cf_arr - base

    jar = np.mean(cf_arr[(ct_arr >= offset_start) & (ct_arr < offset_point)])

    norm = ground / jar
    return norm