from models.LIFACnoise import LifacNoiseModel
from parser.CellData import CellData
from experiments.Baseline import get_baseline_class
from experiments.FiCurve import get_fi_curve_class
from fitting.Fitter import Fitter
from fitting.ModelFit import get_best_fit, ModelFit

import time
import os
import argparse
import numpy as np
from my_util.helperFunctions import plot_errors

import multiprocessing as mp

SAVE_DIRECTORY = "./results/final_sam/"
SAVE_DIRECTORY_BEST = "./results/final_sam_best/"

# SAVE_DIRECTORY = "./results/ref_and_tau/no_dend_tau/"
# SAVE_DIRECTORY_BEST = "./results/ref_and_tau/ndt_best/"
# [vs, sc, cv, isi_hist, bursty, f_inf, f_inf_slope, f_zero, f_zero_slope, f0_curve]
ERROR_WEIGHTS = (1, 1, 1, 1, 1, 1, 1, 1, 0, 1)


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("--cell", help="folder (with .dat files) containing the cell data")
    args = parser.parse_args()
    if args.cell is not None:
        cell_data = CellData(args.cell)
        cell_name = os.path.split(cell_data.get_data_path())[-1]
        if os.path.exists(SAVE_DIRECTORY + "/" + cell_name + "/"):
            print(cell_name, "already done")
            return

        start_parameters = [p for p in iget_start_parameters()]
        fit_cell_parallel(cell_data, start_parameters)
        quit()

    # test_single_cell("data/invivo/2010-11-08-al-invivo-1/")
    test_single_cell("data/final/2012-12-21-am-invivo-1/")

    # start_parameters = [p for p in iget_start_parameters()]
    # cell_data = CellData("data/invivo_bursty/2014-03-19-ae-invivo-1/")
    # fit_cell_parallel(cell_data, start_parameters)


def test_single_cell(path):
    cell_data = CellData(path)
    start_parameters = [p for p in iget_start_parameters()]

    for i, p in enumerate(start_parameters):
        fitter = Fitter()
        fitter.set_data_reference_values(cell_data)
        fmin, res_par = fitter.fit_routine_no_dend_tau_and_no_ref_period(p, ERROR_WEIGHTS)

        cell_path = os.path.split(cell_data.get_data_path())[-1]

        error = fitter.calculate_errors(model=LifacNoiseModel(res_par))
        save_path = SAVE_DIRECTORY + cell_path + "/start_parameter_{:}_err_{:.2f}/".format(i, sum(error))
        save_fitting_run_info(cell_data, res_par, p, plot=True, save_path=save_path)
        print("Done with start parameters {}".format(str(i)))


def fit_cell_base(parameters):
    # parameter = (cell_data, start_parameter_index, start_parameter)
    time1 = time.time()
    fitter = Fitter()
    fitter.set_data_reference_values(parameters[0])
    fmin, res_par = fitter.fit_routine(parameters[2], ERROR_WEIGHTS)

    cell_data = parameters[0]
    cell_name = os.path.split(cell_data.get_data_path())[-1]

    error = fitter.calculate_errors(model=LifacNoiseModel(res_par))
    save_path = SAVE_DIRECTORY + "/" + cell_name + "/start_parameter_{:}_err_{:.2f}/".format(parameters[1], sum(error))
    save_fitting_run_info(parameters[0], res_par, parameters[2], plot=True, save_path=save_path)
    plot_errors(fitter.errors, save_path)
    fit = ModelFit(save_path)
    fit.generate_master_plot(save_path)
    time2 = time.time()

    del fitter

    print("Time taken for " + cell_name +
          "\n and start parameters ({:}): {:.2f}s thread time".format(parameters[1]+1, time2 - time1) +
          "\n error: {:.2f}".format(sum(error)))


def fit_cell_parallel(cell_data, start_parameters):
    cell_path = os.path.basename(cell_data.get_data_path())
    save_path_cell = os.path.join(SAVE_DIRECTORY, cell_data.get_cell_name())

    print(cell_path)
    core_count = mp.cpu_count()
    pool = mp.Pool(core_count - 1)

    parameters = []
    for i, p in enumerate(start_parameters):
        parameters.append((cell_data, i, p))

    time1 = time.time()
    pool.map(fit_cell_base, parameters)
    time2 = time.time()
    print("Time taken for all start parameters ({:}): {:.2f}s".format(len(start_parameters), time2-time1))
    del pool
    del cell_data

    best_fit = get_best_fit(save_path_cell)
    best_fit.generate_master_plot(SAVE_DIRECTORY_BEST)
    best_fit.generate_master_plot(SAVE_DIRECTORY)


def iget_start_parameters():
    # mem_tau, input_scaling, noise_strength, dend_tau,
    # expand by tau_a, delta_a ?

    mem_tau_list = [0.001]
    input_scaling_list = [80]
    noise_strength_list = [0.01]
    dend_tau_list = [0.002]
    delta_a_list = [0.01, 0.03, 0.065]
    tau_a_list = [0.02, 0.04]
    ref_time_list = [0.00065, 0.0012]

    for mem_tau in mem_tau_list:
        for input_scaling in input_scaling_list:
            for noise_strength in noise_strength_list:
                for dend_tau in dend_tau_list:
                    for delta_a in delta_a_list:
                        for tau_a in tau_a_list:
                            for ref_time in ref_time_list:
                                yield {"mem_tau": mem_tau, "input_scaling": input_scaling,
                                       "noise_strength": noise_strength, "dend_tau": dend_tau,
                                       "delta_a": delta_a, "tau_a": tau_a, "refractory_period": ref_time}


def save_fitting_run_info(cell_data, parameters, start_parameters, plot=False, save_path=None):
    if save_path is not None:
        if not os.path.exists(save_path):
            os.makedirs(save_path)

    if save_path is None:
        return

    with open(save_path + "parameters_info.txt", "w") as file:
        file.writelines(["start_parameters:\t" + str(start_parameters),
                         "\nfinal_parameters:\t" + str(parameters)])

    model = LifacNoiseModel(parameters)
    eod_frequency = cell_data.get_eod_frequency()

    data_baseline = get_baseline_class(cell_data)
    c_bf = data_baseline.get_baseline_frequency()
    c_vs = data_baseline.get_vector_strength()
    c_sc = data_baseline.get_serial_correlation(1)
    c_cv = data_baseline.get_coefficient_of_variation()
    c_burst = data_baseline.get_burstiness()

    data_fi_curve = get_fi_curve_class(cell_data, cell_data.get_fi_contrasts(), save_dir=cell_data.get_data_path())
    c_f_inf_slope = data_fi_curve.get_f_inf_slope()
    c_f_inf_values = data_fi_curve.f_inf_frequencies

    c_f_zero_slope = data_fi_curve.get_f_zero_fit_slope_at_straight()
    c_f_zero_values = data_fi_curve.f_zero_frequencies

    if c_f_inf_slope < 0:
        contrasts = np.array(cell_data.get_fi_contrasts()) * -1
    else:
        contrasts = np.array(cell_data.get_fi_contrasts())
    model_baseline = get_baseline_class(model, eod_frequency, trials=15)
    m_bf = model_baseline.get_baseline_frequency()
    m_vs = model_baseline.get_vector_strength()
    m_sc = model_baseline.get_serial_correlation(1)
    m_cv = model_baseline.get_coefficient_of_variation()
    m_burst = model_baseline.get_burstiness()

    model_ficurve = get_fi_curve_class(model, cell_data.get_fi_contrasts(), eod_frequency, trials=60)
    m_f_infinities = model_ficurve.get_f_inf_frequencies()
    m_f_zeros = model_ficurve.get_f_zero_frequencies()
    m_f_infinities_slope = model_ficurve.get_f_inf_slope()
    m_f_zero_slope = model_ficurve.get_f_zero_fit_slope_at_straight()

    np.save(os.path.join(save_path, "model_fi_inf_values.npy"), np.array(m_f_infinities))
    np.save(os.path.join(save_path, "cell_fi_inf_values.npy"), np.array(c_f_inf_values))
    np.save(os.path.join(save_path, "model_fi_zero_values.npy"), np.array(m_f_zeros))
    np.save(os.path.join(save_path, "cell_fi_zero_values.npy"), np.array(c_f_zero_values))

    with open(os.path.join(save_path, "cell_data_path.txt"), "w") as f:
        path = cell_data.get_data_path() + "\n"
        f.write(path)

    if c_f_inf_slope < 0:
        model_ficurve.stimulus_values = contrasts * -1

    # print("EOD-frequency: {:.2f}".format(cell_data.get_eod_frequency()))
    # print("bf: cell - {:.2f} vs model {:.2f}".format(c_bf, m_bf))
    # print("vs: cell - {:.2f} vs model {:.2f}".format(c_vs, m_vs))
    # print("sc: cell - {:.2f} vs model {:.2f}".format(c_sc[0], m_sc[0]))
    # print("cv: cell - {:.2f} vs model {:.2f}".format(c_cv, m_cv))
    # print("f_inf_slope: cell - {:.2f} vs model {:.2f}".format(c_f_inf_slope, m_f_infinities_slope))
    # print("f infinity values:\n cell  -", c_f_inf_values, "\n model -", m_f_infinities)
    #
    # print("f_zero_slope: cell - {:.2f} vs model {:.2f}".format(c_f_zero_slope, m_f_zero_slope))
    # print("f zero values:\n cell  -", c_f_zero_values, "\n model -", m_f_zeros)
    if save_path is not None:
        with open(save_path + "value_comparision.tsv", 'w') as value_file:
            value_file.write("Variable\tCell\tModel\n")
            value_file.write("baseline_frequency\t{:.2f}\t{:.2f}\n".format(c_bf, m_bf))
            value_file.write("vector_strength\t{:.2f}\t{:.2f}\n".format(c_vs, m_vs))
            value_file.write("serial_correlation\t{:.2f}\t{:.2f}\n".format(c_sc[0], m_sc[0]))
            value_file.write("Burstiness\t{:.2f}\t{:.2f}\n".format(c_burst, m_burst))
            value_file.write("coefficient_of_variation\t{:.2f}\t{:.2f}\n".format(c_cv, m_cv))
            value_file.write("f_inf_slope\t{:.2f}\t{:.2f}\n".format(c_f_inf_slope, m_f_infinities_slope))
            value_file.write("f_zero_slope\t{:.2f}\t{:.2f}\n".format(c_f_zero_slope, m_f_zero_slope))

    if plot:
        # plot model images
        model_baseline.plot_baseline(save_path)
        model_baseline.plot_interspike_interval_histogram(save_path)
        model_baseline.plot_isi_histogram_comparision(data_baseline.get_interspike_intervals(),
                                                      model_baseline.get_interspike_intervals(), save_path)
        model_baseline.plot_serial_correlation(6, save_path)

        model_ficurve.plot_fi_curve(save_path)
        model_ficurve.plot_fi_curve_comparision(data_fi_curve, model_ficurve, save_path)


if __name__ == '__main__':
    main()