#!/usr/bin/env python
# -*- coding: utf8 -*-
import os.path, glob, subprocess, sys, time, datetime, pytz
#
if len(sys.argv) < 2:
    full_rebuild = False
if len(sys.argv)== 2:
    if   sys.argv[1]=="True": full_rebuild = True
    elif sys.argv[1]=="1"   : full_rebuild = True
    else: full_rebuild = False
if len(sys.argv) > 2:
    full_rebuild = False
    print "Cannot process more than one parameter: {0}".format(str(sys.argv))
#
def touch(fname):
    if os.path.exists(fname): os.utime(fname, None)
    else: open(fname, 'a').close()
#
def get_ftime(fname):
    if os.path.isfile(fname): return os.path.getctime(fname)
    else: return 0
#
web_dir      = os.path.abspath(os.path.join(os.path.dirname(__file__),'..'))
script_dir   = os.path.abspath(os.path.join(web_dir,'scripts'))
touch_file   = os.path.abspath(os.path.join(script_dir,'last_run'))
#
cur_time = time.time()
fil_time = get_ftime(touch_file)
#
# Static execution time
#reg_hour   = time.strftime("%H")
#reg_minute = time.strftime("%M")
#sch_hour   = 12 #scheduled hour = 3am Boulder = 12pm CPH
#sch_minute =  7 #scheduled minute = 7 past
#
# Dynamically calculated execution (includes daylight saving time etc
masterTime = pytz.timezone('US/Pacific')
#slaveTime  = pytz.timezone('Europe/Copenhagen')
now_master = datetime.datetime.now(masterTime)
run_master = datetime.datetime.strptime("03:00:00", '%H:%M:%S')
#
now_master     = datetime.time(now_master.hour, now_master.minute  , now_master.second)
run_master     = datetime.time(run_master.hour, run_master.minute  , run_master.second)
run_master_end = datetime.time(run_master.hour, run_master.minute+5, run_master.second)
#
lim_days = 0.90
lim_time = cur_time - 60*60*24*lim_days # seconds
#
if now_master >= run_master     and \
   now_master <= run_master_end and \
   not full_rebuild:
    print "This is a scheduled rebuild at {0}.".format(run_master)
    if fil_time < lim_time: full_rebuild = True
    else: print "It looks like the files have been rebuilt during the last day."
#
lim_days = 3
lim_time = cur_time - 60*60*24*lim_days # seconds
if fil_time < lim_time and not full_rebuild:
    print "The static files have not been updated in {0} days, forcing an update now.".format(lim_days)
    full_rebuild = True

#req_dir = [os.path.abspath(os.path.join(web_dir,'_static','fluid_properties','Incompressibles_reports'))]
#req_fil = [os.path.abspath(os.path.join(web_dir,'fluid_properties','Mixtures.csv')),
#  os.path.abspath(os.path.join(web_dir,'fluid_properties','PurePseudoPure.csv')),
#  os.path.abspath(os.path.join(web_dir,'fluid_properties','Incompressibles_pure-fluids.csv'))]
#
#for d in req_dir:
#    if not os.path.exists(d) and not full_rebuild:
#        print "The required directory {0} is missing, trying to rebuild it.".format(d)
#        full_rebuild = True
#for f in req_fil:
#    if not os.path.exists(f):
#        print "The required file {0} is missing, trying to rebuild it.".format(f)
#        full_rebuild = True
# print "Executing the normal scripts for generating the static files."
# script_files = glob.glob(os.path.join(script_dir,'*.py')) # Avoid recursion
# script_files = [os.path.abspath(f) for f in script_files if not os.path.abspath(f)==os.path.abspath(__file__)]
# for script in script_files:
#     print "Executing {0}".format(script)
#     subprocess.call('python {0}'.format(os.path.basename(script)), cwd=script_dir, shell=True)
#
def run_script(path):
    if os.path.exists(path):
        file_path = os.path.dirname(path)
        file_name = os.path.basename(path)
        file_extension = path.split(".")[-1]
        #file_name, file_extension = os.path.splitext(path)

        if file_extension.lower()=="py":
            subprocess.check_call('python {0}'.format(file_name), cwd=file_path, shell=True)
        elif file_extension.lower()=="sh" or file_extension.lower()=="bsh":
            subprocess.check_call('chmod +x {0}'.format(file_name), cwd=file_path, shell=True)
            subprocess.check_call('./{0}'.format(file_name), cwd=file_path, shell=True)
        else:
            print "Unknown file extension in {0}".format(path)
    else:
        print "Could not find the file {0}".format(path)

# The normal tasks that are carried out each time the script runs
normal_tasks = [ "fluid_properties.PurePseudoPure.py", "fluid_properties.Mixtures.py","coolprop.parametric_table.py"]
# The expensive tasks that are fired when full_rebuild is True
expensive_tasks = ["fluid_properties.Consistency.py", "fluid_properties.Incompressibles.sh", "logo_2014.py", "fluid_properties.REFPROPcomparison.py"]
print "Executing the normal scripts for generating static files."
for script in normal_tasks:
    print "Executing {0}".format(script)
    run_script(os.path.join(script_dir,script))
#
if full_rebuild:
    print "Executing the computationally expensive scripts for generating the static files."
    touch(touch_file)
    for script in expensive_tasks:
        print "Executing {0}".format(script)
        run_script(os.path.join(script_dir,script))
else:
    print "Skipping the computationally expensive scripts for generating the static files."