from piston.handler import BaseHandler
from piston.utils import rc
from k4ever.buyable.models import *
from k4ever.transaction.models import *
from django.contrib.auth.decorators import user_passes_test
from django.contrib.auth.models import Group
from decorators import *
from decimal import Decimal, InvalidOperation
import datetime

def getInt(d, key, default):
	try:
		return int(d.get(key, default))
	except ValueError:
		return default

def getDecimal(d, key, default):
	try:
		return Decimal(d.get(key, default))
	except InvalidOperation:
		return default

class BuyableItemHandler(BaseHandler):
	allowed_methods = ('GET', 'POST')
	#fields = ('id', 'description')
	model = Buyable
	exclude = ('_*',)
	
	def read(self, request, itemId=None):
		if itemId == None:
			if request.GET.has_key('type'):
				obj = Buyable.objects.filter(buyableType__name=request.GET['type'])
			else:
				obj = Buyable.objects.all()
			return obj
		try:
			return Buyable.objects.get(id=itemId)
		except Buyable.DoesNotExist:
			error = rc.NOT_FOUND
			error.write("This buyable does not exist in our database")
			return error
	
	@manglePluginPerms
	def create(self, request, itemId=None):
		if not request.content_type:
			request.data = request.POST
		if not itemId:
			return rc.BAD_REQUEST
		item = None
		try:
			item = Buyable.objects.get(id=itemId)
		except Buyable.DoesNotExist:
			return rc.NOT_FOUND
		
		# parse post data 
		deposit = getInt(request.data, 'deposit', 0)
		amount = getInt(request.data, 'amount', 1)
		if amount < 1:
			return rc.BAD_REQUEST
		if item.hasDeposit() and deposit > 0:
			return rc.BAD_REQUEST # this is just the user being plain stupid
		order = Order()
		order.create(request.user)
		order.save()
		
		for i in range(amount):
			p = Purchase.create(order, item, isDeposit=False)
			p.save()
			if deposit > 0:
				p = Purchase.create(order, item, isDeposit=True)
				p.save()
		order.updatePrice(commit=True)
		order.save()
			
		return rc.ALL_OK

class BuyableTypeHandler(BaseHandler):
	allowed_methods = ('GET',)
	model = BuyableType

class TransactionTransactHandler(BaseHandler):
	allowed_methods = ('GET', 'POST')
	model = Transaction
	fields = ('amount', 'dateTime', 'checked', ('transactionType', ('id', 'name')))
	
	@manglePluginPerms
	def read(self, request):
		num = getInt(request.GET, 'num', 0)
		if num < 0:
			return rc.BAD_REQUEST
		
		userTrans  = Transaction.objects.filter(user=request.user)
		if num > 0:
			return userTrans[:num]
		return userTrans
	
	@manglePluginPerms
	def create(self, request):
		amount = getDecimal(request.POST, 'amount', Decimal(0))
		tTypeId  = getInt(request.POST, 'type', -1)
		
		if amount <= 0:
			ret = rc.BAD_REQUEST
			rc.write("\nA negative amount is not supported right now (there has not been put enough thought into the 'lending money' process\n")
			return ret
		tType = None
		try:
			tType = TransactionType.objects.get(id=tTypeId)
		except TransactionType.DoesNotExist:
			ret = rc.BAD_REQUEST
			ret.write("\nYour TransactionType could not be found\n")
			return ret
		trans = Transaction()
		trans.user = request.user
		trans.transactionType = tType
		trans.dateTime = datetime.datetime.now()
		trans.amount = amount
		
		trans.save()
		return rc.ALL_OK

class TransactionTypeHandler(BaseHandler):
	allowed_methods = ('GET',)
	model = TransactionType

class AccountBalanceHandler(BaseHandler):
	allowed_methods = ('GET',)
	
	@manglePluginPerms
	def read(self, request):
		balance = request.user.get_profile().balance
		return {'balance': balance}

class AuthBlobHandler(BaseHandler):
	allowed_methods = ('GET', 'POST')
	
	@requirePlugin
	@manglePluginPerms
	def read(self, request):
		if not request.plugin.pluginCanReadAuthblob:
			ret = rc.FORBIDDEN
			ret.write("\nThis plugin is not allowed to read the users authblob\n")
			return ret
		return request.pluginperms.authblob
	
	@requirePlugin
	@manglePluginPerms
	def create(self, request):
		if not request.plugin.pluginCanWriteAuthblob:
			ret = rc.FORBIDDEN
			ret.write("\nThis plugin is not allowed to write the users authblob\n")
			return ret
		if not request.data.has_key('authblob'):
			ret = rc.BAD_REQUEST
			ret.write("\nTo change the users auth blob you actually need to provide one\n")
		request.pluginperms.authblob = request.data['authblob']
		request.pluginperms.authblob.save()
		
		return rc.ALL_OK

class AuthUserHandler(BaseHandler):
	allowed_methods = ('GET')
	fields = ('id', 'username')
	
	@requirePlugin
	def read(self, request):
		if not request.plugin.uniqueAuthblob:
			ret = rc.BAD_REQUEST
			ret.write("\nThis plugin does not support unique auth blobs, therefore we can't identify an user uniquely by its authblob\n")
			return ret

		if not request.GET.has_key('authblob'):
			return rc.BAD_REQUEST
		
		try:
			perm = PluginPermission.objects.get(plugin=request.plugin, authblob=request.GET['authblob'])
			return perm.user
		except PluginPermission.DoesNotExist:
			return rc.NOT_FOUND

class ConfigHandler(BaseHandler):
	allowed_methods = ('GET',)
	
	def read(self, request):
		return {
					'version':	'0.1',
					'mediaurl':	'http://devcat.someserver.de:13805/media',
			   }