import sys

import re

import datetime

import sqlite3

T_CODE=r"[WEGT]\d{6}[A-Z]*"

NAME_CHARS=r"[\w().#_`?°-]"

connection=sqlite3.connect("egd.db")

def loadTourneys(filename,enc="iso8859_2"):

	# code class rounds players (country) description

	regexp=re.compile(r"(%s)\s+([A-D])\s+(\d+)\s+(\d+)\s+\(([A-Z]{2})\)\s+(.*)" % T_CODE)

	tournaments=dict()

	for line in open(filename,encoding=enc):

		line=line.strip()

		match=regexp.match(line)

		if match is None:

			print("ignored:",line,file=sys.stderr)

			continue

		(code,cls,rc,pc,cc,dsc)=match.groups()

		t=dict(zip(

			["code","class","roundCount","playerCount","countryCode","description"],

			(code,cls,int(rc),int(pc),cc,dsc)

		))

		d=datetime.datetime.strptime(t["code"][1:7],"%y%m%d")

		t["date"]=d.date().isoformat()

		tournaments[t["code"]]=t

	return tournaments

def loadPlayers(filename,enc="iso8859_2"):

	# pin name country club rank tournamentCode wins games gor1 gor2

	regexp=re.compile(r"(\d+)\s+(%s+(?: %s+)*)\s+([A-Z]{2})\s+([\w?.=\\-]+)\s+(\d+[kdp])\s+(%s)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)" % (NAME_CHARS,NAME_CHARS,T_CODE))

	players=[]

	for line in open(filename,encoding=enc):

		line=line.strip()

		if not line: continue

		match=regexp.match(line)

		if match is None:

			print("ignored:",line,file=sys.stderr)

			continue

		(pin,name,cc,cl,rank,tcode,wc,gc,r1,r2)=match.groups()

		record=dict(zip(

			["pin","name","countryCode","club","rank","tournamentCode","winCount","gameCount","rating1","rating2"],

			(int(pin),name,cc,cl,rank,tcode,int(wc),int(gc),int(r1),int(r2))

		))

		players.append(record)

	return players

def setupDB():

	cursor=connection.cursor()

	cursor.execute("""create table tournaments (code text primary key, datum text, class text, round_count integer, player_count integer, country_code text, description text)""")

	cursor.execute("""create table players (pin integer primary key, name text)""")

	cursor.execute("""create table players_performance (pin integer references players(pin), tournament_code text references tournaments(code), country_code text, club text, win_count integer, game_count integer, rating_before real, rating_after real, primary key (pin,tournament_code))""")

	cursor.execute("""

		create view players_performance_tournaments (pin,p_country_code,rating_before,rating_after,t_country_code,datum) as

			select pin,pp.country_code,rating_before,rating_after,ts.country_code,datum

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

	""")

	connection.commit()

def fillDB(tournaments,players):

	cursor=connection.cursor()

	cursor.execute("""delete from players_performance""")

	cursor.execute("""delete from players""")

	cursor.execute("""delete from tournaments""")

	cursor.executemany(

		"""insert into tournaments (code,datum,class,round_count,player_count,country_code,description) values (:code,:date,:class,:roundCount,:playerCount,:countryCode,:description)""",

		tournaments.values()

	)

	cursor.executemany("""insert or ignore into players (pin,name) values (:pin,:name)""", players)

	cursor.executemany(

		"""insert into players_performance (pin,tournament_code,country_code,club,win_count,game_count,rating_before,rating_after) values (:pin,:tournamentCode,:countryCode,:club,:winCount,:gameCount,:rating1,:rating2)""",

		players

	)

	connection.commit()

from egd import connection

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 populationAge():

	pass

# playerYear("Kotowski Jaroslav",2017)

# yearByCountry(2017)