import os.path
#! /usr/bin/python

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__author__="bjschuma"
__date__ ="$Jan 23, 2010 8:40:03 PM$"

import sqlite3
#import settings
from ct.path import *
import ocarina


def getdb():
	return join(ocarina.vars.OCARINA,"ocarina.db")


def dbexists():
	return exists(getdb())


def connect():
	path = getdb()
	con = sqlite3.connect(path)
	con.text_factory = str
	return con


def disconnect(con):
	con.commit()
	con.close()




class Statement():
	def __init__(self):
		self.statement = ""
		self.con = connect()
		self.commit = True

	def __del__(self):
		self.con.close()

	def commitdb(self):
		self.con.commit()

	def execute(self,vals=None):
		if self.statement == "":
			return
		if vals==None:
			result = self.con.execute(self.statement)
		else:
			result = self.con.execute(self.statement,vals)

		if self.commit == True:
			self.commitdb()
		return result




class CTable(Statement):
	def __init__(self,name):
		Statement.__init__(self)
		self.name = name
		self.cols = []

	def addcol(self,name,type,params=""):
		self.cols += [(name,type,params)]

	def execute(self):
		self.statement = "CREATE TABLE "+self.name + " ("
		for index,col in enumerate(self.cols):
			if not index == 0:
				self.statement += ", "
			self.statement += "  " + col[0] + " " + col[1] + " " + col[2]
		self.statement += " );"
		return Statement.execute(self)




class Select(Statement):
	def __init__(self,What,From,Where=None):
		Statement.__init__(self)
		self.commit = False
		self.What = What
		self.From = From
		self.Where = Where

	def execute(self):
		self.statement = "SELECT " + self.What
		self.statement += " FROM " + self.From
		if not self.Where==None:
			self.statement += " WHERE " + self.Where
		return Statement.execute(self)




class Insert(Statement):
	def __init__(self,table,values=[]):
		Statement.__init__(self)
		self.table = table
		self.values = values

	def addval(self,val):
		self.values += [val]

	def execute(self):
		self.statement = "INSERT INTO "+ self.table + " VALUES("
		qs = ""
		for i in range(len(self.values)):
			if not i == 0:
				qs+=","
			qs+="?"
			#self.values[i] = str(self.values[i])
		self.statement+=qs + ")"
		Statement.execute(self, self.values)



class Remove(Statement):
	def __init__(self,table,where=""):
		Statement.__init__(self)
		self.table = table
		self.where = where

	def execute(self):
		self.statement = "DELETE FROM " + self.table
		if not self.where=="":
			self.statement += " WHERE "+self.where
		Statement.execute(self)