import os
import time
import settings
os.environ['PYTHONPATH'] = settings.PYTHON_PATH
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'settings')
from django.core import management
from django.db import connection
from django.contrib.auth.models import User
from django.http import HttpResponse
from django.core.urlresolvers import reverse
from troggle.core.models import Cave, Entrance
import troggle.flatpages.models

databasename=settings.DATABASES['default']['NAME']
expouser=settings.EXPOUSER
expouserpass=settings.EXPOUSERPASS
expouseremail=settings.EXPOUSER_EMAIL

def reload_db():
    if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
        try:
            os.remove(databasename)
        except OSError:
            pass
    else:
        cursor = connection.cursor()
        cursor.execute("DROP DATABASE %s" % databasename)
        cursor.execute("CREATE DATABASE %s" % databasename)
        cursor.execute("ALTER DATABASE %s CHARACTER SET=utf8" % databasename)
        cursor.execute("USE %s" % databasename)
    management.call_command('syncdb', interactive=False)
    user = User.objects.create_user(expouser, expouseremail, expouserpass)
    user.is_staff = True
    user.is_superuser = True
    user.save()

def make_dirs():
    """Make directories that troggle requires"""
    #should also deal with permissions here.
    if not os.path.isdir(settings.PHOTOS_ROOT):
        os.mkdir(settings.PHOTOS_ROOT)

def import_caves():
    import parsers.caves
    print("Importing Caves")
    parsers.caves.readcaves()

def import_people():
    import parsers.people
    parsers.people.LoadPersonsExpos()

def import_logbooks():
    import parsers.logbooks
    parsers.logbooks.LoadLogbooks()

def import_survex():
    import parsers.survex
    parsers.survex.LoadAllSurvexBlocks()
    parsers.survex.LoadPos()

def import_QMs():
    import parsers.QMs
    # import process runs on qm.csv in only 3 caves, not 264!
    
def import_surveys():
    import parsers.surveys
    parsers.surveys.parseSurveys(logfile=settings.LOGFILE)

def import_surveyscans():
    import parsers.surveys
    parsers.surveys.LoadListScans()

def import_tunnelfiles():
    import parsers.surveys
    parsers.surveys.LoadTunnelFiles()

def pageredirects():
    for oldURL, newURL in [("indxal.htm", reverse("caveindex"))]:
        f = troggle.flatpages.models.Redirect(originalURL = oldURL, newURL = newURL)
        f.save()

def reset():
    """ Wipe the troggle database and import everything from legacy data
    """
    reload_db()
    make_dirs()
    pageredirects()
    import_caves()
    import_people()
    import_surveyscans()
    import_logbooks()
    import_QMs()
    import_survex()
    import_tunnelfiles()
    import_surveys()

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
def import_auto_logbooks():
    import parsers.logbooks
    import os
    for pt in troggle.core.models.PersonTrip.objects.all():
        pt.delete()
    for lbe in troggle.core.models.LogbookEntry.objects.all():
        lbe.delete()
    for expedition in troggle.core.models.Expedition.objects.all():
        directory = os.path.join(settings.EXPOWEB,
                                 "years",
                                 expedition.year,
                                 "autologbook")
        for root, dirs, filenames in os.walk(directory):
            for filename in filenames:
                print(os.path.join(root, filename))
                parsers.logbooks.parseAutoLogBookEntry(os.path.join(root, filename))

#Temporary function until definitive source of data transfered.
from django.template.defaultfilters import slugify
from django.template import Context, loader
def dumplogbooks():
    def get_name(pe):
            if pe.nickname:
                return pe.nickname
            else:
                return pe.person.first_name
    for lbe in troggle.core.models.LogbookEntry.objects.all():
            dateStr = lbe.date.strftime("%Y-%m-%d")
            directory = os.path.join(settings.EXPOWEB, 
                                "years",
                                lbe.expedition.year, 
                                "autologbook")
            if not os.path.isdir(directory):
                os.mkdir(directory)
            filename = os.path.join(directory, 
                                    dateStr + "." + slugify(lbe.title)[:50] + ".html")
            if lbe.cave:
                print(lbe.cave.reference())
                trip = {"title": lbe.title, "html":lbe.text, "cave": lbe.cave.reference(), "caveOrLocation": "cave"}
            else:
                trip = {"title": lbe.title, "html":lbe.text, "location":lbe.place, "caveOrLocation": "location"}
            pts = [pt for pt in lbe.persontrip_set.all() if pt.personexpedition]
            persons = [{"name": get_name(pt.personexpedition), "TU": pt.time_underground, "author": pt.is_logbook_entry_author} for pt in pts]
            f = open(filename, "wb")
            template = loader.get_template('dataformat/logbookentry.html')
            context = Context({'trip': trip, 
                               'persons': persons,
                               'date': dateStr,
                               'expeditionyear': lbe.expedition.year})
            output = template.render(context)
            f.write(unicode(output).encode( "utf-8" ))
            f.close()
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

def usage():
    print("""Usage is 'python databaseReset.py <command>'
             where command is:
             reset     - this is normal usage, clear database and reread everything from files - time-consuming
             caves     - read in the caves 
             logbooks  - read in just the logbooks
             people    - read in the people from folk.csv
             QMs       - read in the QM files
             reload_db - clear database i.e. delete everything
             scans     - NOT the scanned surveynotes ?!
             survex    - read in the survex files - all the survex blocks
             survexpos - just the Pos out of the survex files
             surveys   - read in the scanned surveynotes
             tunnel    - read in the Tunnel files - which scans the surveyscans too

             resetend     - (archaic?)
             writecaves   - *disabled* (archaic?)
             autologbooks - read in autologbooks (what are these?)
             dumplogbooks - write out autologbooks (not working?)
             """)

if __name__ == "__main__":
    import troggle.core.models
    import sys
    import django
    django.setup()

    if "caves" in sys.argv:
        import_caves()
    elif "logbooks" in sys.argv:
        # management.call_command('syncdb', interactive=False)  # this sets the path so that import settings works in import_survex
        import_logbooks()
    elif "people" in sys.argv:
        import_people()
    elif "QMs" in sys.argv:
        import_QMs()
    elif "reload_db" in sys.argv:
        reload_db()
    elif "reset" in sys.argv:
        reset()
    elif "scans" in sys.argv:
        import_surveyscans()
    elif "survex" in sys.argv:
        # management.call_command('syncdb', interactive=False)  # this sets the path so that import settings works in import_survex
        import_survex()
    elif "survexpos" in sys.argv:
        # management.call_command('syncdb', interactive=False)  # this sets the path so that import settings works in import_survex
        import parsers.survex
        parsers.survex.LoadPos()    
    elif "surveys" in sys.argv:
        import_surveys()
    elif "tunnel" in sys.argv:
        import_tunnelfiles()
    elif "help" in sys.argv:
        usage()
    elif "resetend" in sys.argv:
        import_QMs()
        import_tunnelfiles()
        import_surveys()
        #import_descriptions() # no longer present
        #parse_descriptions() # no longer present
    # elif "writeCaves" in sys.argv:
        # writeCaves() # no longer present
    elif "autologbooks" in sys.argv:
        import_auto_logbooks()
    elif "dumplogbooks" in sys.argv:
        dumplogbooks()
    else:
        print("%s not recognised" % sys.argv)
        usage()