import config
import os
import time
import sqlite3
import subprocess

def run():
	connection = sqlite3.connect(config.db_file)
	cursor = connection.cursor()
	now = int(time.time())
	max_created_utc = now - config.max_age_seconds
	print("Deleting old posts")
	delete = "DELETE FROM post WHERE created_utc < ?"
	binds = [max_created_utc]
	cursor.execute(delete, binds)
	print("Deleting posts from blocked subreddits")
	select = "SELECT name FROM block WHERE name like '/r/%'"
	binds = [row[0][3:] for row in cursor.execute(select).fetchall()]
	bind_array = ",".join(["?"]*len(binds))
	delete = f"DELETE FROM post WHERE subreddit IN ({bind_array})"
	cursor.execute(delete, binds)
	print("Deleting old media db rows")
	delete = "DELETE FROM media WHERE permalink NOT IN (SELECT permalink FROM post)"
	cursor.execute(delete)
	print("Deleving media db for read posts")
	delete = "DELETE FROM media WHERE permalink IN (SELECT permalink FROM post WHERE hidden = ?)"
	binds = [True]
	cursor.execute(delete, binds)
	print("Updating media_fetched for read posts")
	update = "UPDATE post SET media_fetched = ? WHERE hidden = ?"
	binds = [False, True]
	cursor.execute(update, binds)
	all_files_local = subprocess.run(["find", "/reddit/media", "-type", "f"], capture_output=True, text=True)
	all_files_local = set(all_files_local.stdout.splitlines())
	select = "SELECT local from media"
	results = cursor.execute(select).fetchall()
	connection.commit()
	connection.close()
	all_files_db = set([row[0] for row in results])
	extra_files = all_files_local - all_files_db
	print("Deleting old files")
	for file in extra_files:
		print(f"Removing {file}")
		os.remove(file)
	empty_dirs = subprocess.run(["find", "/reddit/media", "-type", "d", "-empty"], capture_output=True, text=True)
	empty_dirs = set(empty_dirs.stdout.splitlines())
	print("Deleting empty directories")
	for dir in empty_dirs:
		print(f"Removind dir {dir}")
		os.rmdir(dir)
	print("Done")

run()