import urllib
import string
from django.forms import ModelForm
from django.db import models
from django.contrib import admin
from django.core.files.storage import FileSystemStorage
import os
import troggle.settings as settings
import datetime

from models_survex import *

class Expedition(models.Model):
    year        = models.CharField(max_length=20, unique=True)
    name        = models.CharField(max_length=100)
    date_from  = models.DateField(blank=True,null=True)
    date_to    = models.DateField(blank=True,null=True)

    def __unicode__(self):
        return self.year

    class Meta:
        ordering = ('year',)
    
    def GuessDateFrom(self):
	try:
		return self.logbookentry_set.order_by('date')[0].date
	except IndexError:
		pass

    def GuessDateTo(self):		# returns the date of the last logbook entry in the expedition
	try:
		return self.logbookentry_set.order_by('date')[-1].date
	except IndexError:
		pass

    def ListDays(self):
	if self.date_from and self.date_to:
		res=[]
		date=self.date_from
		while date <= self.date_to:
			res.append(date)
			date+=datetime.timedelta(days=1)
		return res
	elif self.GuessDateFrom() and self.GuessDateTo(): 	# if we don't have the real dates, try it with the dates taken from the earliest and latest logbook entries
		date=self.GuessDateFrom()
		while date <= self.GuessDateTo():
			res.append(date)
			date+=datetime.timedelta(days=1)
		return res

    # deprecated
    def GetPersonExpedition(self, name):
        person_expeditions = PersonExpedition.objects.filter(expedition=self)
        res = None
        for person_expedition in person_expeditions:
            for possible_name_from in person_expedition.GetPossibleNameForms():
                #print "nnn", possiblenamefrom
                if name == possible_name_from:
                    assert not res, "Ambiguous: " + name
                    res = person_expedition
        return res

    


class Person(models.Model):
    first_name  = models.CharField(max_length=100)
    last_name   = models.CharField(max_length=100)
    is_vfho     = models.BooleanField(help_text="VFHO is the Vereines f&uuml;r H&ouml;hlenkunde in Obersteier, a nearby Austrian caving club.")    
    mug_shot    = models.CharField(max_length=100, blank=True,null=True)
    blurb = models.TextField(blank=True,null=True)
    href        = models.CharField(max_length=200)
    
    class Meta:
	    verbose_name_plural = "People"
    class Meta:
        ordering = ('last_name', 'first_name')
    
    def __unicode__(self):
        if self.last_name:
            return "%s %s" % (self.first_name, self.last_name)
        return self.first_name
    
    # these ought to be possible by piping through |min in the template, or getting the first of an ordered list
    def Firstexpedition(self):
        return self.personexpedition_set.order_by('expedition')[0]
    def Lastexpedition(self):
        return self.personexpedition_set.order_by('-expedition')[0]
    

class PersonExpedition(models.Model):
    expedition  = models.ForeignKey(Expedition)
    person      = models.ForeignKey(Person)
    date_from   = models.DateField(blank=True,null=True)
    date_to     = models.DateField(blank=True,null=True)
    is_guest    = models.BooleanField(default=False)  
    nickname    = models.CharField(max_length=100,blank=True,null=True)
    
    def GetPersonroles(self):
        res = [ ]
        for personrole in self.personrole_set.order_by('survex_block'):
            if res and res[-1]['survexpath'] == personrole.survex_block.survexpath:
                res[-1]['roles'] += ", " + str(personrole.role)
            else:
                res.append({'date':personrole.survex_block.date, 'survexpath':personrole.survex_block.survexpath, 'roles':str(personrole.role)})
        print res
        return res

    class Meta:
        ordering = ('expedition',)
    
    def GetPersonChronology(self):
        res = { }
        for persontrip in self.persontrip_set.all():
            a = res.setdefault(persontrip.date, { })
            a.setdefault("persontrips", [ ]).append(persontrip)
        for personrole in self.personrole_set.all():
            a = res.setdefault(personrole.survex_block.date, { })
            b = a.setdefault("personroles", { })
            survexpath = personrole.survex_block.survexpath
            
            if b.get(survexpath):
                b[survexpath] += ", " + str(personrole.role)
            else:
                b[survexpath] = str(personrole.role)
# needs converting dict into list            
        return sorted(res.items())

    
    # deprecated
    def GetPossibleNameForms(self):
        res = [ ]
        if self.person.last_name:
            res.append("%s %s" % (self.person.first_name, self.person.last_name))
            res.append("%s %s" % (self.person.first_name, self.person.last_name[0]))
        res.append(self.person.first_name)
        if self.nickname:
            res.append(self.nickname)
        return res
	    
    def ListDays(self):
	if self.date_from and self.date_to:
		res=[]
		date=self.date_from
		while date <= self.date_to:
			res.append(date)
			date+=datetime.timedelta(days=1)
		return res

    def ListDaysTF(self):
	if self.date_from and self.date_to:
		res=[]
		for date in self.expedition.ListDays():
			res.append(date in self.ListDays())
		return res

    def __unicode__(self):
        return "%s: (%s)" % (self.person, self.expedition)
    
    def name(self):
        if self.nickname:
            return "%s (%s) %s" % (self.person.first_name, self.nickname, self.person.last_name)
        if self.person.last_name:
            return "%s %s" % (self.person.first_name, self.person.last_name)
        return self.person.first_name

	
#class LogbookSentanceRating(models.Model):
#    rating = models.IntegerField()
#    person_trip = models.ForeignKey(PersonTrip)
#    sentance_number = models.IntegerField()
    
#    def __unicode__(self):
#	    return person_trip

class Area(models.Model):
    short_name = models.CharField(max_length=100)
    name = models.CharField(max_length=200, blank=True, null=True)
    description = models.TextField(blank=True,null=True)
    parent = models.ForeignKey('Area', blank=True, null=True)
    def __unicode__(self):
        if self.parent:
            return unicode(self.parent) + u" - " + unicode(self.short_name)
        else:
            return unicode(self.short_name)
    def kat_area(self):
        if self.short_name in ["1623", "1626"]:
            return self.short_name
        elif self.parent:
            return self.parent.kat_area()

class CaveAndEntrance(models.Model):
    cave = models.ForeignKey('Cave')
    entrance = models.ForeignKey('Entrance')
    entrance_letter = models.CharField(max_length=20,blank=True,null=True)
    def __unicode__(self):
        return unicode(self.cave) + unicode(self.entrance_letter)
        
class Cave(models.Model):
    official_name = models.CharField(max_length=160)
    area = models.ManyToManyField(Area, blank=True, null=True)
    kataster_code = models.CharField(max_length=20,blank=True,null=True)
    kataster_number = models.CharField(max_length=10,blank=True, null=True)
    unofficial_number = models.CharField(max_length=60,blank=True, null=True)
    entrances = models.ManyToManyField('Entrance', through='CaveAndEntrance')
    explorers = models.TextField(blank=True,null=True)
    underground_description = models.TextField(blank=True,null=True)
    equipment = models.TextField(blank=True,null=True)
    references = models.TextField(blank=True,null=True)
    survey = models.TextField(blank=True,null=True)
    kataster_status = models.TextField(blank=True,null=True)
    underground_centre_line = models.TextField(blank=True,null=True)
    notes = models.TextField(blank=True,null=True)
    length = models.CharField(max_length=100,blank=True,null=True)
    depth = models.CharField(max_length=100,blank=True,null=True)
    extent = models.CharField(max_length=100,blank=True,null=True)
    survex_file = models.CharField(max_length=100,blank=True,null=True) #should be filefield, need to fix parser first
    def __unicode__(self):
        if self.kataster_number:
            if self.kat_area():
                return self.kat_area() + u": " + self.kataster_number
            else:
                return unicode("l") + u": " + self.kataster_number
        else:
            if self.kat_area():
                return self.kat_area() + u": " + self.unofficial_number
            else:
                return self.unofficial_number
    def kat_area(self):
        for a in self.area.all():
            if a.kat_area():
                return a.kat_area()
    def entrances(self):
        return CaveAndEntrance.objects.filter(cave=self)
    def entrancelist(self):
        rs = []
        res = ""
        for e in CaveAndEntrance.objects.filter(cave=self):
            rs.append(e.entrance_letter)
        rs.sort()
        prevR = None
        n = 0
        for r in rs:
            if prevR:
                if chr(ord(prevR) + 1 ) == r:
                    prevR = r
                    n += 1
                else:
                    if n == 0:
                        res += ", " + prevR
                    else:
                        res += "&ndash;" + prevR
            else:
                prevR = r
                n = 0
                res += r
        if n == 0:
            res += ", " + prevR
        else:
            res += "&ndash;" + prevR
        return res

class LogbookEntry(models.Model):
    date    = models.DateField()
    expedition  = models.ForeignKey(Expedition,blank=True,null=True)  # yes this is double-
    author  = models.ForeignKey(PersonExpedition,blank=True,null=True)  # the person who writes it up doesn't have to have been on the trip
    title   = models.CharField(max_length=200)
    cave    = models.ForeignKey(Cave,blank=True,null=True)
    place   = models.CharField(max_length=100,blank=True,null=True)  
    text    = models.TextField()
    href    = models.CharField(max_length=100)
    
    logbookentry_next  = models.ForeignKey('LogbookEntry', related_name='pnext', blank=True,null=True)
    logbookentry_prev  = models.ForeignKey('LogbookEntry', related_name='pprev', blank=True,null=True)
    
    class Meta:
	   verbose_name_plural = "Logbook Entries"
        # several PersonTrips point in to this object
    
    def __unicode__(self):
        return "%s: (%s)" % (self.date, self.title)

class PersonTrip(models.Model):
    person_expedition = models.ForeignKey(PersonExpedition)
    
        # this will be a foreign key of the place(s) the trip went through
        # possibly a trip has a plurality of triplets pointing into it
    place           = models.CharField(max_length=100)  
    date            = models.DateField()    
    time_underground = models.FloatField()  
    logbook_entry    = models.ForeignKey(LogbookEntry)
    is_logbook_entry_author = models.BooleanField()
    
    persontrip_next  = models.ForeignKey('PersonTrip', related_name='pnext', blank=True,null=True)
    persontrip_prev  = models.ForeignKey('PersonTrip', related_name='pprev', blank=True,null=True)

    def __unicode__(self):
        return "%s %s (%s)" % (self.person_expedition, self.place, self.date)


class OtherCaveName(models.Model):
    name = models.CharField(max_length=160)
    cave = models.ForeignKey(Cave)
    def __unicode__(self):
        return unicode(self.name)

class SurveyStation(models.Model):
    name = models.CharField(max_length=200)
    def __unicode__(self):
        return unicode(self.name)

class Entrance(models.Model):
    name = models.CharField(max_length=100, blank=True,null=True)
    entrance_description = models.TextField(blank=True,null=True)
    explorers = models.TextField(blank=True,null=True)
    map_description = models.TextField(blank=True,null=True)
    location_description = models.TextField(blank=True,null=True)
    approach = models.TextField(blank=True,null=True)
    underground_description = models.TextField(blank=True,null=True)
    photo = models.TextField(blank=True,null=True)
    MARKING_CHOICES = (
        ('P', 'Paint'),
        ('P?', 'Paint (?)'),
        ('T', 'Tag'),
        ('T?', 'Tag (?)'),
        ('R', 'Retagged'),
        ('S', 'Spit'),
        ('S?', 'Spit (?)'),
        ('U', 'Unmarked'),
        ('?', 'Unknown'))
    marking = models.CharField(max_length=2, choices=MARKING_CHOICES)
    marking_comment = models.TextField(blank=True,null=True)
    FINDABLE_CHOICES = (
        ('?', 'To be confirmed ...'),
        ('S', 'Surveyed'),
        ('L', 'Lost'),
        ('R', 'Refindable'))
    findability = models.CharField(max_length=1, choices=FINDABLE_CHOICES, blank=True, null=True)
    findability_description = models.TextField(blank=True,null=True)
    alt = models.TextField(blank=True, null=True)
    northing = models.TextField(blank=True, null=True)
    easting = models.TextField(blank=True, null=True)
    tag_station = models.ForeignKey(SurveyStation, blank=True,null=True, related_name="tag_station")
    exact_station = models.ForeignKey(SurveyStation, blank=True,null=True, related_name="exact_station")
    other_station = models.ForeignKey(SurveyStation, blank=True,null=True, related_name="other_station")
    other_description = models.TextField(blank=True,null=True)
    bearings = models.TextField(blank=True,null=True)
    def __unicode__(self):
        a = CaveAndEntrance.objects.filter(entrance = self)
        name = u''
        if self.name:
            name = unicode(self.name) + u' '
        if len(a) == 1:
            return name + unicode(a[0])
        return name + unicode(a)
    def marking_val(self):
        for m in self.MARKING_CHOICES:
            if m[0] == self.marking:
                return m[1]
    def findability_val(self):
        for f in self.FINDABLE_CHOICES:
            if f[0] == self.findability:
                return f[1]

class QM(models.Model):
    #based on qm.csv in trunk/expoweb/smkridge/204 which has the fields:
    #"Number","Grade","Area","Description","Page reference","Nearest station","Completion description","Comment"
    found_by = models.ForeignKey(LogbookEntry, related_name='QMs_found',blank=True, null=True )
    ticked_off_by = models.ForeignKey(LogbookEntry, related_name='QMs_ticked_off',null=True,blank=True)
    number = models.IntegerField()
    GRADE_CHOICES=(
	('A', 'A: Large obvious lead'),
	('B', 'B: Average lead'),
	('C', 'C: Tight unpromising lead'),
	('D', 'D: Dig'),
	('X', 'X: Unclimbable aven')
    )
    grade = models.CharField(max_length=1, choices=GRADE_CHOICES)
    location_description = models.TextField(blank=True)
    #should be a foreignkey to surveystation
    nearest_station_description = models.CharField(max_length=400,null=True,blank=True)
    nearest_station = models.OneToOneField(SurveyStation,null=True,blank=True)
    area = models.CharField(max_length=100,blank=True,null=True)
    completion_description = models.TextField(blank=True,null=True)
    comment=models.TextField(blank=True,null=True)
    #the below are unneeded- instead use the date fields of the QM's trips
    #dateFound = models.DateField(blank=True)
    #dateKilled = models.DateField(blank=True)
    def __str__(self):
	QMnumber=str(self.found_by.cave)+'-'+str(self.found_by.date.year)+"-"+str(self.number)+self.grade
	return str(QMnumber)
	
class Photo(models.Model): 
    caption = models.CharField(max_length=1000,blank=True,null=True)
    contains_person_trip = models.ManyToManyField(PersonTrip,blank=True,null=True)
    contains_person = models.ManyToManyField(Person,blank=True,null=True)
    file = models.ImageField(upload_to='photos',)
    is_mugshot = models.BooleanField(default=False)
    contains_cave = models.ForeignKey(Cave,blank=True,null=True)
    contains_entrance = models.ForeignKey(Entrance, related_name="photo_file",blank=True,null=True)
    nearest_survey_point = models.ForeignKey(SurveyStation,blank=True,null=True)
    nearest_QM = models.ForeignKey(QM,blank=True,null=True)
    
    
    lon_utm = models.FloatField(blank=True,null=True)
    lat_utm = models.FloatField(blank=True,null=True)
    #content_type = models.ForeignKey(ContentType)
    #object_id = models.PositiveIntegerField()
    #location = generic.GenericForeignKey('content_type', 'object_id')

    def __str__(self):
        return self.caption

scansFileStorage = FileSystemStorage(location=settings.SURVEYS, base_url=settings.SURVEYS_URL)
def get_scan_path(instance, filename):
    year=instance.survey.expedition.year
    print "WN: ", type(instance.survey.wallet_number), instance.survey.wallet_number
    number="%02d" % instance.survey.wallet_number + str(instance.survey.wallet_letter) #using %02d string formatting because convention was 2009#01
    return os.path.join('./',year,year+r'#'+number,instance.contents+str(instance.number_in_wallet)+r'.jpg')

class ScannedImage(models.Model): 
    file = models.ImageField(storage=scansFileStorage, upload_to=get_scan_path)
    scanned_by = models.ForeignKey(Person,blank=True, null=True)
    scanned_on = models.DateField(null=True)
    survey = models.ForeignKey('Survey')
    contents = models.CharField(max_length=20,choices=(('notes','notes'),('plan','plan_sketch'),('elevation','elevation_sketch')))
    number_in_wallet = models.IntegerField(null=True)
    lon_utm = models.FloatField(blank=True,null=True)
    lat_utm = models.FloatField(blank=True,null=True)
    #content_type = models.ForeignKey(ContentType)
    #object_id = models.PositiveIntegerField()
    #location = generic.GenericForeignKey('content_type', 'object_id')

    #This is an ugly hack to deal with the #s in our survey scan paths. The correct thing is to write a custom file storage backend which calls urlencode on the name for making file.url but not file.path.
    def correctURL(self):
	return string.replace(self.file.url,r'#',r'%23')
    
    def __str__(self):
        return get_scan_path(self,'')

class Survey(models.Model):
    expedition = models.ForeignKey('Expedition')
    wallet_number = models.IntegerField(blank=True,null=True)
    wallet_letter = models.CharField(max_length=1,blank=True,null=True)
    comments = models.TextField(blank=True,null=True)
    location = models.CharField(max_length=400,blank=True,null=True)
    #notes_scan = models.ForeignKey('ScannedImage',related_name='notes_scan',blank=True, null=True)  	#Replaced by contents field of ScannedImage model
    survex_block  = models.ForeignKey('SurvexBlock',blank=True, null=True)
    centreline_printed_on = models.DateField(blank=True, null=True)
    centreline_printed_by = models.ForeignKey('Person',related_name='centreline_printed_by',blank=True,null=True)
    #sketch_scan = models.ForeignKey(ScannedImage,blank=True, null=True) 					#Replaced by contents field of ScannedImage model
    tunnel_file = models.FileField(upload_to='surveyXMLfiles',blank=True, null=True)
    tunnel_main_sketch = models.ForeignKey('Survey',blank=True,null=True)
    integrated_into_main_sketch_on = models.DateField(blank=True,null=True)
    integrated_into_main_sketch_by = models.ForeignKey('Person' ,related_name='integrated_into_main_sketch_by', blank=True,null=True)
    rendered_image = models.ImageField(upload_to='renderedSurveys',blank=True,null=True)
    def __str__(self):
        return self.expedition.year+"#"+"%02d" % self.wallet_number

    def notes(self):
	    return self.scannedimage_set.filter(contents='notes')

    def plans(self):
	    return self.scannedimage_set.filter(contents='plan')

    def elevations(self):
	    return self.scannedimage_set.filter(contents='elevation')