import os
from math import sqrt
#from shallow_water_h import *
from shallow_water_domain import *
from Numeric import zeros, Float
from analytic_dam_sudi import AnalyticDam

h0=5.0
h1=10.0

analytical_sol=AnalyticDam(h0,h1)

"""
def newLinePlot(title='Simple Plot'):
    import Gnuplot
    gg=Gnuplot.Gnuplot(persist=0)
    gg.title(title)
    gg('set data style linespoints')
    gg.xlabel('x')
    gg.ylabel('y')
    return gg

def linePlot(gg, x1, y1, x2, y2):
    import Gnuplot
    plot1=Gnuplot.PlotItems.Data(x1.flat, y1.flat, with="linespoints")
    plot2=Gnuplot.PlotItems.Data(x2.flat, y2.flat, with="lines 3")
    gg.plot(plot1, plot2)
"""


print "TEST 1D-SOLUTION I"

L=2000.0
N=400

cell_len=L/N

points=zeros(N+1, Float)
for i in range(N+1):
    points[i]=i*cell_len

domain=Domain(points)

domain.default_order = 2
domain.default_time_order = 1
domain.cfl = 1.0
domain.limiter = "vanleer"



def height(x):
    y=zeros(len(x), Float)
    for i in range (len(x)):
        if x[i]<=L/4.0:
            y[i]=0.0 #h0
        elif x[i]<=3*L/4.0:
            y[i]=h1
        else:
            y[i]=h0
    return y

domain.set_quantity('stage',height) #('height', height)
domain.order=domain.default_order
print "domain order", domain.order

domain.set_boundary({'exterior':Reflective_boundary(domain)})

X=domain.vertices
C=domain.centroids
#plot1x=newLinePlot("Height")
#plot2x=newLinePlot("Momentum")


import time
t0=time.time()
yieldstep=30.0
finaltime=20.0
print "integral", domain.quantities['stage'].get_integral() #['height'].get_integral()
for t in domain.evolve(yieldstep=yieldstep, finaltime=finaltime):
    domain.write_time()
    print "integral", domain.quantities['stage'].get_integral() #['height'].get_integral()
    if t>0.0:
        HeightQ=domain.quantities['stage'].vertex_values #['height'].vertex_values
        MomentumQ=domain.quantities['xmomentum'].vertex_values
        h, uh=analytical_sol(X.flat, domain.time)
        #linePlot(plot1x, X, HeightQ, X, h)
        #linePlot(plot2x, X, MomentumQ, X, uh)
        #print "press return"
        #pass
    
        from pylab import plot,title,xlabel,ylabel,legend,savefig,show,hold,subplot
        #print 'Test1'
        hold(False)
        #print 'test 2'
        plot1 = subplot(211)
        #print 'test 3'
    
        plot(X,h,X,HeightQ)
        #print 'Test4'
        plot1.set_ylim([0,11])
        xlabel('Position')
        ylabel('Stage')
        #legend(('Analytical Solution', 'Numerical Solution'),
        #   'lower right', shadow=False)
        plot2 = subplot(212)
        plot(X,uh,X,MomentumQ)
        #plot2.set_ylim([-5,35])
        legend(('Analytical Solution', 'Numerical Solution'),
           'lower right', shadow=False)
    
        xlabel('Position')
        ylabel('Xmomentum')
        
        file = "dam_h_"
        #file += str(number_of_cells[i])
        file += ".eps"
        #savefig(file)
        show()

print 'That took %.2f seconds'%(time.time()-t0)