#!/usr/bin/python3

"""
Reads enwiki page view info from a database, and stores it
as node popularity values in the database.
"""

import os, sqlite3

PAGEVIEWS_DB = os.path.join('enwiki', 'pageview_data.db')
DB_FILE = 'data.db'

def genData(pageviewsDb: str, dbFile: str) -> None:
	dbCon = sqlite3.connect(dbFile)
	dbCur = dbCon.cursor()
	#
	print('Getting view counts')
	pdbCon = sqlite3.connect(pageviewsDb)
	pdbCur = pdbCon.cursor()
	nodeToViews: dict[str, int] = {} # Maps node names to counts
	iterNum = 0
	for wikiId, views in pdbCur.execute('SELECT id, views from views'):
		iterNum += 1
		if iterNum % 1e4 == 0:
			print(f'At iteration {iterNum}') # Reached 1.6e6
		#
		row = dbCur.execute('SELECT name FROM wiki_ids WHERE id = ?', (wikiId,)).fetchone()
		if row is not None:
			nodeToViews[row[0]] = views
	pdbCon.close()
	#
	print(f'Writing {len(nodeToViews)} entries to db')
	dbCur.execute('CREATE TABLE node_pop (name TEXT PRIMARY KEY, pop INT)')
	for nodeName, views in nodeToViews.items():
		dbCur.execute('INSERT INTO node_pop VALUES (?, ?)', (nodeName, views))
	#
	dbCon.commit()
	dbCon.close()

if __name__ == '__main__':
	import argparse
	parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
	args = parser.parse_args()
	#
	genData(PAGEVIEWS_DB, DB_FILE)