import pyfstat
import numpy as np

outdir = 'data'

label = 'directed_setup'
data_label = '{}_data'.format(label)

# Properties of the GW data
sqrtSX = 1e-23
tstart = 1000000000
Tspan = 100*86400
tend = tstart + Tspan

# Fixed properties of the signal
F0_center = 30
F1_center = 1e-10
F2 = 0
Alpha = np.radians(83.6292)
Delta = np.radians(22.0144)
tref = .5*(tstart+tend)


VF0 = VF1 = 100
DeltaF0 = VF0 * np.sqrt(3)/(np.pi*Tspan)
DeltaF1 = VF1 * np.sqrt(45/4.)/(np.pi*Tspan**2)

depth = 100

nsteps = 25
run_setup = [((nsteps, 0), 20, False),
             ((nsteps, 0), 7, False),
             ((nsteps, 0), 2, False),
             ((nsteps, nsteps), 1, False)]

h0 = sqrtSX / float(depth)
r = np.random.uniform(0, 1)
theta = np.random.uniform(0, 2*np.pi)
F0 = F0_center + 3*np.sqrt(r)*np.cos(theta)/(np.pi**2 * Tspan**2)
F1 = F1_center + 45*np.sqrt(r)*np.sin(theta)/(4*np.pi**2 * Tspan**4)

psi = np.random.uniform(-np.pi/4, np.pi/4)
phi = np.random.uniform(0, 2*np.pi)
cosi = np.random.uniform(-1, 1)

data = pyfstat.Writer(
    label=data_label, outdir=outdir, tref=tref,
    tstart=tstart, F0=F0, F1=F1, F2=F2, duration=Tspan, Alpha=Alpha,
    Delta=Delta, h0=h0, sqrtSX=sqrtSX, psi=psi, phi=phi, cosi=cosi,
    detector='H1,L1')
data.make_data()
predicted_twoF = data.predict_fstat()

theta_prior = {'F0': {'type': 'unif',
                      'lower': F0-DeltaF0,
                      'upper': F0+DeltaF0},
               'F1': {'type': 'unif',
                      'lower': F1-DeltaF1,
                      'upper': F1+DeltaF1},
               'F2': F2,
               'Alpha': Alpha,
               'Delta': Delta
               }

ntemps = 1
log10temperature_min = -1
nwalkers = 100

mcmc = pyfstat.MCMCFollowUpSearch(
    label=label, outdir=outdir,
    sftfilepath='{}/*{}*sft'.format(outdir, data_label),
    theta_prior=theta_prior,
    tref=tref, minStartTime=tstart, maxStartTime=tend,
    nwalkers=nwalkers, ntemps=ntemps, nsteps=[nsteps, nsteps],
    log10temperature_min=log10temperature_min)
#mcmc.run(Nsegs0=20, R=10)
mcmc.run(run_setup)