"""Script for running a dam break simulation of UQ's dam break tank.


Ole Nielsen and Duncan Gray, GA - 2006 


Issues
If running this is hand-set-up parallel, the python files are overwritten.

"""


#----------------------------------------------------------------------------
# Import necessary modules
#----------------------------------------------------------------------------

# Standard modules
import time
from time import localtime, strftime
import sys
from shutil import copy
from os import path, sep
from os.path import dirname  #, basename

# Related major packages
from anuga.shallow_water import Domain, Reflective_boundary, \
                            Dirichlet_boundary, Time_boundary, File_boundary
from anuga.abstract_2d_finite_volumes.region import Set_region 
from anuga.fit_interpolate.interpolate import interpolate_sww2csv
from anuga.abstract_2d_finite_volumes.util import start_screen_catcher, \
     copy_code_files


# Scenario specific imports
import project                 # Definition of file names and polygons
import create_mesh


def main(friction, outputdir_name=None, is_trial_run=False):
    basename = 'zz' + str(friction)
    if is_trial_run is True:
        outputdir_name += '_test'
        yieldstep = 1
        finaltime = 31
    else:
        yieldstep = 0.01
        finaltime = 31
    pro_instance = project.Project(['data','flumes','dam_2006'],
                                       outputdir_name=outputdir_name)
    mesh_filename = pro_instance.meshdir + basename + '.msh'

    #--------------------------------------------------------------------------
    # Copy scripts to output directory and capture screen
    # output to file
    #--------------------------------------------------------------------------

    # creates copy of code in output dir
    print "The output dir is", pro_instance.outputdir
    copy_code_files(pro_instance.outputdir,__file__,
                    dirname(project.__file__) \
                    + sep + project.__name__+'.py')
    copy (pro_instance.codedir + 'run_dam.py',
          pro_instance.outputdir + 'run_dam' + str(friction)+ '.py')
    copy (pro_instance.codedir + 'create_mesh.py',
          pro_instance.outputdir + 'create_mesh.py')
    if is_trial_run is False:
        start_screen_catcher(pro_instance.outputdir, int(friction*100))

    print 'USER:    ', pro_instance.user
    #-------------------------------------------------------------------------
    # Create the triangular mesh
    #-------------------------------------------------------------------------
    
    gate_position = 0.85
    create_mesh.generate(mesh_filename,
                         gate_position,
                         is_coarse=is_trial_run) # this creates the mesh

    head,tail = path.split(mesh_filename)
    copy (mesh_filename,
          pro_instance.outputdir + tail )
    #-------------------------------------------------------------------------
    # Setup computational domain
    #-------------------------------------------------------------------------
    domain = Domain(mesh_filename, use_cache = False, verbose = True)
   

    print 'Number of triangles = ', len(domain)
    print 'The extent is ', domain.get_extent()
    print domain.statistics()

    
    domain.set_name(basename)
    domain.set_datadir(pro_instance.outputdir)
    domain.set_quantities_to_be_stored(['stage', 'xmomentum', 'ymomentum'])
    domain.set_minimum_storable_height(0.01)
    #domain.set_store_vertices_uniquely(True)  # for writting to sww

    #-------------------------------------------------------------------------
    # Setup initial conditions
    #-------------------------------------------------------------------------

    slope = 0.05

    def elevation_tilt(x, y):
        return x*slope
        
    domain.set_quantity('stage', elevation_tilt)
    domain.set_quantity('friction', friction) 
    domain.set_quantity('elevation',elevation_tilt)

    print 'Available boundary tags', domain.get_boundary_tags()
    domain.set_region('dam','stage',0.20,
                                 location = 'unique vertices') 
    #domain.set_region(Set_region('dam','stage',0.2,
    #                             location = 'unique vertices'))

    Br = Reflective_boundary(domain)
    Bd = Dirichlet_boundary([0,0,0])  # to drain the water out.
    domain.set_boundary( {'wall': Br, 'edge': Bd} )

    #-------------------------------------------------------------------------
    # Evolve system through time
    #-------------------------------------------------------------------------
    t0 = time.time()

    for t in domain.evolve(yieldstep, finaltime):
        domain.write_time()
    
        print 'That took %.2f seconds' %(time.time()-t0)
        print 'finished'

    points = [[gate_position - 0.65,0.2],
              [gate_position - 0.55,0.2],
              [gate_position - 0.45,0.2],
              [gate_position - 0.35,0.2],
              [gate_position - 0.25,0.2]
              ]

    #-------------------------------------------------------------------------
    # Calculate gauge info
    #-------------------------------------------------------------------------

    interpolate_sww2csv(pro_instance.outputdir + basename +".sww",
                        points,
                        pro_instance.outputdir + "depth_manning_"+str(friction)+".csv",
                        pro_instance.outputdir + "velocity_x.csv",
                        pro_instance.outputdir + "velocity_y.csv")
  
    return pro_instance

#-------------------------------------------------------------
if __name__ == "__main__":
    for friction in [ 0.05]:
        main(friction, is_trial_run = True, outputdir_name='friction_set_A')
    
    #    to do
    # .075, -0-1
    # 0.0075 - 0-16
    #.01, - 0-2
    #
    #.0125, - 0-6
    #0.015, - 0-17
    #0.02, - 0-14
    #$0.03]: - 0-7
    # [0.016, - 0-11
    #0.017, -0-8
    #0.018, -0-9
    #0.019]: - 0-12
    # 0.005 - 0-20
    # 0.02 - 4
    # 0.016 - 8
    # 0.017 - 9
    # 0.018 - 1
    # 0.019 -17
    # calc - 7
    # 0.0075 -12

    # Let's fill some gaps
    # 0.0225 - 7
    # 0.025 - 12
    # 0.0275 - 6
    #for friction in [0.0, .0025, .005, .0075, .01, .0125, 0.015, 0.02, 0.03]:
    #for friction in [0.016, 0.017, 0.018, 0.019]:
    #    main(friction, is_trial_run = True, outputdir_name='friction_set')