#!/usr/bin/python3

import psycopg2
import psycopg2.extras

OLD_DB = "mam_old"
NEW_DB = "mamweb"

oldconn = psycopg2.connect(f"dbname={OLD_DB}")
newconn = psycopg2.connect(f"dbname={NEW_DB}")

oldcur = oldconn.cursor(cursor_factory=psycopg2.extras.DictCursor)
newcur = newconn.cursor(cursor_factory=psycopg2.extras.DictCursor)


# Uses global variables oldcur, newcur!
def execute_simple(old_query, new_query=None):
	if new_query is None:
		new_query = old_query

	oldcur.execute(old_query)
	newcur.execute(new_query)

	if oldcur.rowcount != newcur.rowcount:
		raise ValueError(f"Queries '{old_query}' and '{new_query}' returned different number of rows ({oldcur.rowcount} and {newcur.rowcount})")

	return(oldcur.fetchall(), newcur.fetchall())

def check_same(old_row, new_row, old_fields, new_fields=None):
	if type(old_fields) != list:
		old_fields = [old_fields]

	if new_fields is None:
		new_fields = old_fields
	
	fields = zip(old_fields, new_fields)

	for old_field, new_field in fields:
		if old_row[old_field] == new_row[new_field]:
			continue
		raise ValueError(f"Fields '{old_field}' and '{new_field}' differs for rows \n'{old_row}' and \n'{new_row}'")
	return True

def get_user_id_for_org_id(org_id):
	query = """SELECT auth_user.id FROM auth_user 
		INNER JOIN seminar_osoby ON seminar_osoby.user_id = auth_user.id
		INNER JOIN seminar_organizator ON seminar_organizator.osoba_id = seminar_osoby.id
		WHERE seminar_organizator.id = %s """
	
	newcur.execute(query,(org_id,))
	return newcur.fetchone()['id']
	



def check_skola():
	old_query = "SELECT * FROM seminar_skoly ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','aesop_id','izo','nazev','kratky_nazev','ulice','mesto','psc','stat','je_zs','je_ss','poznamka'])

def check_rocnik():
	old_query = "SELECT * FROM seminar_rocniky ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','prvni_rok', 'rocnik', 'exportovat'])

def check_cislo():
	old_query = "SELECT * FROM seminar_cisla ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n, ['id','rocnik_id','cislo', 'datum_vydani','datum_deadline','verejne','poznamka','pdf'],
				['id','rocnik_id','poradi','datum_vydani','datum_deadline','verejne','poznamka','pdf'])

def check_priloha_reseni():
	old_query = "SELECT * FROM seminar_priloha_reseni"
	
	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n, ['id','reseni_id', 'timestamp', 'soubor', 'poznamka'],
				['id','reseni_id', 'vytvoreno', 'soubor', 'poznamka'])

def check_soustredeni():
	old_query = "SELECT * FROM seminar_soustredeni ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','rocnik_id','datum_zacatku','datum_konce','verejne','misto','text','typ','exportovat'])
	#Kontrola ucasnici, organizatori v samostatnych funkcich

def check_soustredeni_ucastnici():
	old_query = "SELECT * FROM seminar_soustredeni_ucastnici ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','resitel_id','soustredeni_id','poznamka'])

def check_soustredeni_organizatori():
	old_query = "SELECT * FROM seminar_soustredeni_organizatori ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','organizator_id','soustredeni_id','poznamka'])

def check_nastaveni():
	old_query = "SELECT * FROM seminar_nastaveni ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','aktualni_cislo_id'])

def check_novinky():
	old_query = "SELECT * FROM seminar_novinky ORDER BY id"

	old_res, new_res = execute_simple(old_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','datum','text','obrazek','zverejneno'])
		if get_user_id_for_org_id(n['autor_id']) != o['autor_id']:
			raise ValueError("Nesedi autori u novinek")
			
def check_pohadka():
	old_query = "SELECT * FROM seminar_pohadky ORDER BY id"
	new_query = """SELECT sp.id AS id, sp.autor_id AS autor_id, sp.vytvoreno AS vytvoreno, snp.treenode_ptr_id AS treenode_ptr_id, st.na_web AS text
			FROM seminar_pohadky AS sp 
			INNER JOIN seminar_nodes_pohadka AS snp ON sp.id = snp.pohadka_id 
			INNER JOIN seminar_nodes_treenode AS snt ON snt.id = snp.treenode_ptr_id
			INNER JOIN seminar_nodes_obsah AS sno ON sno.treenode_ptr_id = snt.first_child_id 
			INNER JOIN seminar_texty AS st ON sno.text_id = st.id

			ORDER BY sp.id"""

	old_res, new_res = execute_simple(old_query,new_query)
	res = zip(old_res,new_res)

	for o,n in res:
		check_same(o,n,['id','timestamp','text'],['id','vytvoreno','text'])
		if o['autor_id'] is not None:
			if get_user_id_for_org_id(n['autor_id']) != o['autor_id']:
				raise ValueError("Nesedi autori u pohadky")






check_skola()
check_rocnik()
check_cislo()
check_priloha_reseni()
check_soustredeni()
check_soustredeni_ucastnici()
check_soustredeni_organizatori()
check_nastaveni()
check_novinky()
check_pohadka()