# add inundation dir to your pythonpath
from pmesh.mesh import Mesh
from coordinate_transforms.geo_reference import Geo_reference


def create_mesh(maximum_triangle_area,
                mesh_file=None,
                triangles_in_name = False):
    """
    triangles_in_name, if True is used to append the number of
    triangles in the mesh to the mesh file name.
    """
    # create a mesh instance
    m = Mesh()

    #
    outer_polygon = [[0,0],[100,0],[100,100],[0,100]]
    m.add_region_from_polygon(outer_polygon, tags={'wall':[0,1,2], 'wave':[3]})

    # inner polygons
    polygon = [[10,10],[20,10],[20,20],[10,20]]
    m.add_hole_from_polygon(polygon, tags={'wall':[0,1,2,3]})

    polygon = [[40,40],[50,40],[50,50],[40,50]]
    m.add_hole_from_polygon(polygon, tags={'wall':[0,1,2,3]})

    m.add_circle([20,70], 5, hole=True, tag='wall')
    m.generate_mesh(maximum_triangle_area=maximum_triangle_area)
    triangle_count = m.get_triangle_count()
    
    if mesh_file is None:    
        return m, triangle_count
    else:
        if triangles_in_name is True:
            mesh_file = mesh_file[:-4] + '_' + str(triangle_count) \
                        + mesh_file[-4:]
        m.export_mesh_file(mesh_file)
        return mesh_file, triangle_count

#-------------------------------------------------------------
if __name__ == "__main__":
    _, triangle_count = create_mesh(10,mesh_file="test.tsh")
    print "triangle_count",triangle_count