"""Create mesh and time boundary for the Okushiri island validation
"""


from Numeric import array, zeros, Float, allclose

from anuga.pmesh.mesh import *
from anuga.pmesh.mesh_interface import create_mesh_from_regions
from anuga.coordinate_transforms.geo_reference import Geo_reference
from anuga.geospatial_data import Geospatial_data

import project




#-------------------------------------------------------------
if __name__ == "__main__":


    #--------------------------------------------------------------------------
    # Create the triangular mesh based on overall clipping polygon with a
    # tagged
    # boundary and interior regions defined in project.py along with
    # resolutions (maximal area of per triangle) for each polygon
    #--------------------------------------------------------------------------


    base_resolution = 100 # Use this to coarsen or refine entire mesh. 

    # Basic geometry and bounding polygon
    xleft   = 0
    xright  = 5.448
    ybottom = 0
    ytop    = 3.402

    point_sw = [xleft, ybottom]
    point_se = [xright, ybottom]
    point_nw = [xleft, ytop]    
    point_ne = [xright, ytop]

    bounding_polygon = [point_se,
                        point_ne,
                        point_nw,
                        point_sw]
    

    # Localised refined area for gulleys
    xl = 4.8
    xr = 5.3
    yb = 1.6
    yt = 2.3
    p0 = [xl, yb]
    p1 = [xr, yb]
    p2 = [xr, yt]
    p3 = [xl, yt]
    
    gulleys = [p0, p1, p2, p3]
    

    # Island area and drawdown region (original)
    #island_0 = [xleft + 2*(xright-xleft)/3+1.2, ytop-0.5]
    #island_1 = [xleft + 2*(xright-xleft)/3+0.5, ybottom + 2*(ytop-ybottom)/3]
    #island_2 = [xleft + (xright-xleft)/2+0.3, ybottom + 2*(ytop-ybottom)/3-0.3]
    #island_3 = [xleft + (xright-xleft)/2+0.3, ybottom + (ytop-ybottom)/3+0.3]
    #island_4 = [xleft + 2*(xright-xleft)/3+0.4, ybottom + (ytop-ybottom)/3-0.3]
    #island_5 = [xleft + 2*(xright-xleft)/3+1.2, ybottom+0.2]
    #island_6 = [xl-.01, yb]  #OK
    #island_7 = [xl-.01, yt]  #OK      


    # Island area and drawdown region
    island_0 = [xleft + 2*(xright-xleft)/3+1.2, ytop-0.5]
    island_1 = [xleft + 2*(xright-xleft)/3+0.5, ybottom + 2*(ytop-ybottom)/3]
    island_2 = [xleft + (xright-xleft)/2+0.4, ybottom + 2*(ytop-ybottom)/3-0.3]
    island_3 = [xleft + (xright-xleft)/2+0.4, ybottom + (ytop-ybottom)/3+0.3]
    island_4 = [xleft + 2*(xright-xleft)/3+0.4, ybottom + (ytop-ybottom)/3-0.3]
    island_5 = [xleft + 2*(xright-xleft)/3+1.2, ybottom+0.8]
    island_6 = [xl-.01, yb]  # Keep right edge just off the gulleys
    island_7 = [xl-.01, yt]
 
    island = [island_0, island_1, island_2,
              island_3, island_4, island_5,
              island_6, island_7]


    # Region spanning half right hand side of domain just inside boundary (org)
    #rhs_nw = [xleft + (xright-xleft)/3+1, ytop-0.02]
    #rhs_sw = [xleft + (xright-xleft)/3+1, ybottom+0.02]
    #rhs_se = [xright-0.02, ybottom+0.02]
    #rhs_ne = [xright-0.02, ytop-0.02]

    # Region spanning half right hand side of domain just inside boundary
    rhs_nw = [xleft + (xright-xleft)/3+1, ytop-1.4]
    rhs_sw = [xleft + (xright-xleft)/3+1, ybottom+0.5]
    rhs_se = [xright-0.1, ybottom+0.2]
    rhs_ne = [xright-0.1, ytop-0.2]        

    rhs_region = [rhs_nw, rhs_ne, rhs_se, rhs_sw]

    
    # Interior regions and creation of mesh
    interior_regions = [[rhs_region, 0.0005],
                        [island, 0.0002*base_resolution],
                        [gulleys, 0.00002*base_resolution]]    

    meshname = project.mesh_filename + '.msh'
    m = create_mesh_from_regions(bounding_polygon,
                                 boundary_tags={'wall': [0, 1, 3],
                                                'wave': [2]},     
                                 maximum_triangle_area=0.1*base_resolution,
                                 interior_regions=interior_regions,
                                 filename=project.mesh_filename,
                                 verbose=True)