cursor=connection.cursor()

def yearStart(year):

	return "{0}-01-01".format(year)

def playerYear(name,year):

	query="""

		select name, datum, win_count, game_count, rating_after, rating_after-rating_before

			from players natural join players_performance as pp join tournaments as ts on pp.tournament_code=ts.code

			where name=? and datum>=date(?) and datum<date(?)

			order by datum asc

	"""

	date1=yearStart(year)

	date2=yearStart(year+1)

	res=cursor.execute(query,(name,date1,date2))

	print("jméno\tdatum\tpočet výher\tpočet partií\trating po turnaji\tzměna")

	for rec in res:

		print("\t".join([str(x) for x in rec]))

def yearByCountry(year):

	date1=yearStart(year)

	date2=yearStart(year+1)

	query="""

		select country_code,count(pin) from (

			select pin,count(*),pp.country_code from

				players_performance as pp join tournaments as ts on pp.tournament_code=ts.code

				where datum>=date(?) and datum<date(?)

				group by pin

			)

			group by country_code

			order by country_code asc;

		"""

	res=cursor.execute(query,(date1,date2))

	print("kód země\tpočet aktivních hráčů")

	for rec in res:

		print("\t".join([str(x) for x in rec]))

def timeRank(year,country):

	date1=yearStart(year)

	date2=yearStart(year+1)

	query="""

		select ppt.pin,date(?)-min_datum-1,min_datum,ppt.rating_after as rating

			from

				(select pin,min(datum) as min_datum,max(datum) as max_datum from players_performance_tournaments where datum<date(?) group by pin having max_datum>=date(?)) as subq

				join players_performance_tournaments as ppt on subq.pin=ppt.pin and subq.max_datum=ppt.datum

			where ppt.p_country_code=?"""

	res=cursor.execute(query,(date2,date2,date1,country))

	print("pin\tcelé roky hraní\tprvní turnaj\trating")

	for rec in res:

		print("\t".join([str(x) for x in rec]))

def populationStrength(year,country):

	date1=yearStart(year)

	date2=yearStart(year+1)

	query="""

		select round((rating_after-50)/100)*100 as rating, count(ppt.pin)

			from players_performance_tournaments as ppt

				join (select pin,max(datum) as max_datum from players_performance_tournaments where datum>=date(?) and datum<date(?) and p_country_code=? group by pin) as subq on ppt.pin=subq.pin and ppt.datum=subq.max_datum

			group by rating

			order by rating desc

	"""

	res=cursor.execute(query,(date1,date2,country))

	print("rating\tpočet hráčů s takovým a vyšším ratingem")

	for rec in res:

		print("\t".join([str(x) for x in rec]))

def populationAge(year,country):

	date1=yearStart(year)

	date2=yearStart(year+1)

	query="""

		select date(?)-min_datum-1 as playing_years,count(pin)

			from (

				select ppt1.pin,min(ppt1.datum) as min_datum

					from players_performance_tournaments as ppt1

						join players_performance_tournaments as ppt2 on ppt1.pin=ppt2.pin

					where ppt2.datum>=date(?) and ppt2.datum<date(?) and ppt1.p_country_code=?

					group by ppt1.pin

			)

			group by playing_years"""

	res=cursor.execute(query,(date2,date1,date2,country))

	print("celé roky hraní\tpočet hráčů")

	for rec in res:

		print("\t".join([str(x) for x in rec]))

# playerYear("Kotowski Jaroslav",2017)

# yearByCountry(2017)

# timeRank(2017,"CZ")

# populationStrength(2017,"CZ")

# populationAge(2017,"CZ")