#!/usr/bin/env python
#
"""
Testing interpolate_sww, based on test_data_manageer, so there maybe code
that isn't needed, eg in the setup file
"""

import unittest
from Numeric import zeros, array, allclose, Float
from util import mean

from interpolate_sww import *
from shallow_water import *
from data_manager import *
#from config import epsilon


class dataTestCase(unittest.TestCase):
    def setUp(self):
        import time
        from mesh_factory import rectangular


        #Create basic mesh
        points, vertices, boundary = rectangular(2, 2)

        #Create shallow water domain
        domain = Domain(points, vertices, boundary)
        domain.default_order=2

        
        #Set some field values
        domain.set_quantity('elevation', lambda x,y: -x)        
        domain.set_quantity('friction', 0.03)


        ###################### 
        # Boundary conditions
        B = Transmissive_boundary(domain)
        domain.set_boundary( {'left': B, 'right': B, 'top': B, 'bottom': B})
        

        ###################### 
        #Initial condition - with jumps


        bed = domain.quantities['elevation'].vertex_values
        level = zeros(bed.shape, Float)

        h = 0.3
        for i in range(level.shape[0]):
            if i % 2 == 0:            
                level[i,:] = bed[i,:] + h
            else:
                level[i,:] = bed[i,:]
                
        domain.set_quantity('level', level)

        domain.distribute_to_vertices_and_edges()    


        self.domain = domain

        C = domain.get_vertex_coordinates()
        self.X = C[:,0:6:2].copy()
        self.Y = C[:,1:6:2].copy()
        
        self.F = bed

        
    def tearDown(self):
        pass

    def test_sww_DSG(self):
        """Not a test, rather a look at the sww format
        """

        import time, os
        from Numeric import array, zeros, allclose, Float, concatenate
        from Scientific.IO.NetCDF import NetCDFFile        

        self.domain.filename = 'datatest' + str(time.time())
        self.domain.format = 'sww'
        self.domain.smooth = True
        self.domain.reduction = mean             
      
        sww = get_dataobject(self.domain)
        sww.store_connectivity()
        sww.store_timestep('level')
        self.domain.time = 2. 
        sww.store_timestep('level')

        #Check contents
        #Get NetCDF
        fid = NetCDFFile(sww.filename, 'r')  
      
        # Get the variables
        x = fid.variables['x']
        y = fid.variables['y']
        z = fid.variables['z']

        volumes = fid.variables['volumes']   
        time = fid.variables['time']

        # 2D 
        stage = fid.variables['stage']       

        X = x[:]
        Y = y[:]
        Z = z[:]
        V = volumes[:]
        T = time[:]
        S = stage[:,:]

        if False:
            print "****************************"
            print "X ",X
            print "****************************"
            print "Y ",Y
            print "****************************"
            print "Z ",Z
            print "****************************"
            print "V ",V
            print "****************************"
            print "Time ",T
            print "****************************"
            print "Stage ",S
            print "****************************"
            

        
        
        fid.close()
      
        #Cleanup
        os.remove(sww.filename)
 
    def test_interpolate_sww(self):
        """Not reaa unit test, rather a system test for 
        """

        import time, os
        from Numeric import array, zeros, allclose, Float, concatenate, \
             transpose
        from Scientific.IO.NetCDF import NetCDFFile    
        import tempfile
        from load_mesh.loadASCII import  load_xya_file     

        self.domain.filename = 'datatest' + str(time.time())
        self.domain.format = 'sww'
        self.domain.smooth = True
        self.domain.reduction = mean             
      
        sww = get_dataobject(self.domain)
        sww.store_connectivity()
        sww.store_timestep('level')
        self.domain.time = 2. 
        sww.store_timestep('level')

        #print "self.domain.filename",self.domain.filename
        interp = Interpolate_sww(sww.filename)
        
        assert allclose(interp.time,[0.0,2.0])
        answer = [ 0.15, 0.1, 0., -0.3, -0.35, -0.4, -0.7, -0.8, -0.850]
        #print "answer",answer
        #print interp.stage[0]
        stage_t = transpose(interp.stage)
        assert allclose(stage_t[0], answer)
        assert allclose(stage_t[1],stage_t[0])

        # create an .xya file
        point_file = tempfile.mktemp(".xya")
        fd = open(point_file,'w')
        fd.write("# demo \n 0.0, 0.6,2.,4 \n 0.0, 0.9,4,8 \n 0.0,0.1,4.,8 \n 0.4,1.0,4.,8 \n")
        fd.close()

        interp.interpolate_xya(point_file)


        answer = [[0.08, 0.08], [0.02, 0.02], [0.14, 0.14], [.08,.08]]
        #print "answer",answer
        assert allclose(interp.point_heights,answer)

        # create an output .xya file
        point_file_out = tempfile.mktemp(".xya")
        interp.write_point_heights_xya(point_file_out)
        
        #check the output file
        xya_dict = load_xya_file(point_file_out)

        assert allclose(interp.point_coordinates, xya_dict['pointlist'])
        assert allclose(interp.point_heights,
                        xya_dict['pointattributelist'] )
        
        title = xya_dict['title'].split('\n')
        #print "title",title
        string_list = title[0].split(',') # assume a title has only one line
        time_list = []

        # this is if titles start with x,y
        #answer = string_list.pop(0)
        #self.failUnless( answer == 'x', 'Title is wrong!')
        #self.failUnless( string_list.pop(0) == 'y', 'Title is wrong!')
        
        for time in string_list:
            time_list.append(float(time))
        #print "interp.time", interp.time
        #print "time_list", time_list
        assert allclose(interp.time,
                        time_list)
        
        
        #Cleanup
        os.remove(sww.filename)
        os.remove(point_file_out)
 
#-------------------------------------------------------------
if __name__ == "__main__":
    suite = unittest.makeSuite(dataTestCase,'test')
    runner = unittest.TextTestRunner()
    runner.run(suite)