import os
import time
import settings
os.environ['PYTHONPATH'] = settings.PYTHON_PATH
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'settings')

if __name__ == '__main__':
    import django
    django.setup()

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('migrate', 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():
    # The below line was causing errors I didn't understand (it said LOGFILE was a string), and I couldn't be bothered to figure
    # what was going on so I just catch the error with a try. - AC 21 May
    try:
        settings.LOGFILE.write('\nBegun importing logbooks at ' + time.asctime() +'\n'+'-'*60)
    except:
        pass
    
    import parsers.logbooks
    parsers.logbooks.LoadLogbooks()

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

def import_QMs():
    import parsers.QMs

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 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()
    try:
        import_tunnelfiles()
    except:
        print("Tunnel files parser broken.")

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

def writeCaves():
    for cave in Cave.objects.all():
        cave.writeDataFile()
    for entrance in Entrance.objects.all():
        entrance.writeDataFile()

def usage():
    print("""Usage is 'python databaseReset.py <command>'
             where command is:
             reset - this is normal usage, clear database and reread everything
             desc
             caves - read in the caves
             logbooks - read in the logbooks
             autologbooks
             dumplogbooks
             people
             QMs      - read in the QM files
             resetend
             scans    - read in the scanned surveynotes
             survex   - read in the survex files
             survexpos
             surveys
             tunnel   - read in the Tunnel files
             writeCaves
             """)

if __name__ == "__main__":
    import troggle.core.models
    import sys
    import django
    django.setup()
    if "desc" in sys.argv:
        resetdesc()
    elif "scans" in sys.argv:
        import_surveyscans()
    elif "caves" in sys.argv:
        import_caves()
    elif "people" in sys.argv:
        import_people()
    elif "QMs" in sys.argv:
        import_QMs()
    elif "tunnel" in sys.argv:
        import_tunnelfiles()
    elif "reset" in sys.argv:
        reset()
    elif "resetend" in sys.argv:
        #import_logbooks()
        import_QMs()
        try:
            import_tunnelfiles()
        except:
            print("Tunnel files parser broken.")
        import_surveys()
        import_descriptions()
        parse_descriptions()
    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 "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 "autologbooks" in sys.argv:
        import_auto_logbooks()
    elif "dumplogbooks" in sys.argv:
        dumplogbooks()
    elif "writeCaves" in sys.argv:
        writeCaves()
    elif "surveys" in sys.argv:
        import_surveys()
    elif "help" in sys.argv:
        usage()
    elif "reload_db" in sys.argv:
        reload_db()
    else:
        print("%s not recognised" % sys.argv)
        usage()