"""
This file contains all your file and directory definitions 
for elevation, meshes and outputs.
"""

import os
from anuga.utilities.system_tools import get_user_name, get_host_name
from time import localtime, strftime, gmtime
from os.path import join, exists
from anuga.lib.add_csv_header.add_csv_header import add_csv_header

#-------------------------------------------------------------------------------
# Directory setup
#-------------------------------------------------------------------------------

# this section needs to be updated to reflect the modelled community.
# Note, the user needs to set up the directory system accordingly
state = 'australia_ph2'
scenario_name = 'melbourne'

#-------------------------------------------------------------------------------
# Initial Conditions
#-------------------------------------------------------------------------------

# Model specific parameters.
# One or all can be changed each time the run_model script is executed
import sys
if len(sys.argv) > 1:
    event_number = int(sys.argv[1])
else:    
    event_number = 58348    # the event number or the mux file name

event_side = 'east' #'east'
if event_side == 'west':
    index = 1979 # index from the PTHA - Y2000 0.257m
    event_number_list = [58348, 64288, 68793] # To piggy back multiple events

elif event_side == 'east':
    index = 2649 
    event_number_list = [31853, 51449, 58115] # To piggy back multiple events

central_meridian = 146.0 # Central meridian for projection (optional)
zone = None
tide = 0                # difference between MSL and HAT
alpha = 0.1             # smoothing parameter for mesh
friction=0.01           # manning's friction coefficient
starttime=0             # start time for simulation
finaltime=60000         # final time for simulation
setup = 'final'         # This can be one of three values
                        #    trial - coarsest mesh, fast
                        #    basic - coarse mesh
                        #    final - fine mesh, slowest

# index is only used when wave = Tb
           
wave = 'Tb'         # Bf (sts wave) Tb (index wave)

internal_polygon = False

#-------------------------------------------------------------------------------
# Output filename
#
# Your output filename should be unique between different runs on different data.
# The list of items below will be used to create a file in your output directory.
# Your user name and time+date will be automatically added.  For example,
#     [setup, tide, event_number]
# will result in a filename like
#     20090212_091046_run_final_0_27283_rwilson
#-------------------------------------------------------------------------------

if internal_polygon:
    internal_poly_comment = 'internal'
else:
    internal_poly_comment = ''

output_comment = [setup, tide, event_number, index, wave, event_side, internal_poly_comment]

#-------------------------------------------------------------------------------
# Input Data
#-------------------------------------------------------------------------------

# ELEVATION DATA
# Used in build_elevation.py
# Format for ascii grids, as produced in ArcGIS + a projection file
ascii_grid_filenames = ['grid_250m_simple']

# Format for points is x,y,elevation (with header)
point_filenames = []               # 

### Add csv header list to all files in point_filenames
##headerlist = ['x', 'y', 'elevation'] 
##for f in point_filenames:
##    add_csv_header(join(topographies_folder, f), headerlist)

# BOUNDING POLYGON - for data clipping and estimate of triangles in mesh
# Used in build_elevation.py
# Format for points: easting,northing (no header)
bounding_polygon_filename = 'bounding_polygon.csv'
bounding_polygon_maxarea = 125000

# INTERIOR REGIONS -  for designing the mesh
# Used in run_model.py
# Format for points easting,northing (no header)                    
interior_regions_data = []

# add an internal polygon to force different mesh generation
# used to test for discretisation error when building elevation
# make sure file is in same folder as interior regions and bouding polygon;
# format is same (2 column .csv; easting, northing; no header)
if internal_polygon:
    interior_regions_data.append(['internal_polygon.csv',
                                  bounding_polygon_maxarea])

# LAND - used to set the initial stage/water to be offcoast only
# Used in run_model.py.  Format for points easting,northing (no header)
land_initial_conditions_filename = []

# GAUGES - for creating timeseries at a specific point
# Used in get_timeseries.py.  
# Format easting,northing,name,elevation (with header)
gauges_filename = 'gauges.csv'

# BUILDINGS EXPOSURE - for identifying inundated houses
# Used in run_building_inundation.py
# Format latitude,longitude etc (geographic)
building_exposure_filename = '.csv' # from NEXIS

# BOUNDING POLYGON - used in build_boundary.py and run_model.py respectively
# NOTE: when files are put together the points must be in sequence
# For ease go clockwise!
# Check the run_model.py for boundary_tags

# Thinned ordering file from Hazard Map (geographic)
# Format is index,latitude,longitude (with header)
urs_order_filename_W = 'urs_order_west_simple.csv'
urs_order_filename_E ='urs_order_east_simple.csv'
##urs_order_filename = 'urs_order_both.csv' # east is first, then west

# Landward bounding points
# Format easting,northing (no header)
landward_boundary_filename_N = 'landward_boundary_north_simple.csv'
landward_boundary_filename_S = 'landward_boundary_south_simple.csv'

# MUX input filename.
# If a meta-file from EventSelection is used, set 'multi-mux' to True.
# If a single MUX stem filename (*.grd) is used, set 'multi-mux' to False.
##mux_input_filename = 'Java-0016-z.grd'
##multi_mux = False
mux_input_filename = 'event.list'
multi_mux = True

# Specify if share cache is to be used
# Whatever is specified here will be relative to INUNDATION_HOME/.cache
# If nothing is specified, local cache will be used.
cachedir = '.python_cache_phII'


################################################################################
################################################################################
####         NOTE: NOTHING WOULD NORMALLY CHANGE BELOW THIS POINT.          ####
################################################################################
################################################################################

# Get system user and host names.
# These values can be used to distinguish between two similar runs by two
# different users or runs by the same user on two different machines.
user = get_user_name()
host = get_host_name()

# Environment variable names.
# The inundation directory, not the data directory.
ENV_INUNDATIONHOME = 'INUNDATIONHOME'

# Path to MUX data
ENV_MUXHOME = 'MUXHOME'

#-------------------------------------------------------------------------------
# Output Elevation Data
#-------------------------------------------------------------------------------

# Output filename for elevation
# this is a combination of all the data generated in build_elevation.py
combined_elevation_basename = scenario_name + '_combined_elevation'

#-------------------------------------------------------------------------------
# Directory Structure
#-------------------------------------------------------------------------------

# determines time for setting up output directories
time = strftime('%Y%m%d_%H%M%S', localtime()) 
gtime = strftime('%Y%m%d_%H%M%S', gmtime()) 
build_time = time + '_build'
run_time = time + '_run_'

# create paths generated from environment variables.
home = join(os.getenv(ENV_INUNDATIONHOME), 'data') # Absolute path for data folder
muxhome = os.getenv(ENV_MUXHOME)

# Create absolute pathname for cache directory
# and change caching to use it
if 'cachedir' in dir():
    cachedir = join(os.getenv(ENV_INUNDATIONHOME), '.cache', cachedir)
    from anuga.caching import caching
    caching.set_option('cachedir', cachedir) 
    
# check various directories/files that must exist
anuga_folder = join(home, state, scenario_name, 'anuga')
topographies_folder = join(anuga_folder, 'topographies')
polygons_folder = join(anuga_folder, 'polygons')
boundaries_folder = join(anuga_folder, 'boundaries')
output_folder = join(anuga_folder, 'outputs')
gauges_folder = join(anuga_folder, 'gauges')
meshes_folder = join(anuga_folder, 'meshes')
event_folder = join(boundaries_folder, str(event_number))

# MUX data files
# Directory containing the MUX data files to be used with EventSelection.
mux_data_folder = join(muxhome, 'mux')

#-------------------------------------------------------------------------------
# Location of input and output data
#-------------------------------------------------------------------------------

# Convert the user output_comment to a string for run_model.py
output_comment = ('_'.join([str(x) for x in output_comment if x != user])
                  + '_' + user)

# The absolute pathname of the all elevation, generated in build_elevation.py
combined_elevation = join(topographies_folder, combined_elevation_basename)

# The absolute pathname of the mesh, generated in run_model.py
meshes = join(meshes_folder, scenario_name) + '.msh'

# The pathname for the urs order points, used within build_urs_boundary.py
urs_order_east = join(boundaries_folder, urs_order_filename_E)
urs_order_west = join(boundaries_folder, urs_order_filename_W)

# The absolute pathname for the landward points of the bounding polygon,
# Used within run_model.py)
landward_boundary_N = join(boundaries_folder, landward_boundary_filename_N)
landward_boundary_S = join(boundaries_folder, landward_boundary_filename_S)

# The absolute pathname for the .sts file, generated in build_boundary.py
event_sts_east = join(event_folder, scenario_name) + '_east'
event_sts_west = join(event_folder, scenario_name) + '_west'

# The absolute pathname for the output folder names
# Used for build_elevation.py
output_build = join(output_folder, build_time) + '_' + str(user) 
# Used for run_model.py
output_run = join(output_folder, run_time) + output_comment 
# Used by post processing
output_run_time = join(output_run, scenario_name) 

# The absolute pathname for the gauges file
# Used for get_timeseries.py
gauges = join(gauges_folder, gauges_filename)       

# The absolute pathname for the building file
# Used for run_building_inundation.py
building_exposure = join(gauges_folder, building_exposure_filename)

# full path to where MUX files (or meta-files) live
mux_input = join(event_folder, mux_input_filename)

# sts gauge with desired index number - used for wave 'Tb'
boundary_csv = join(event_folder, 'sts_gauge_' + str(index) + '.csv')