#!/usr/bin/env python3
"""Install items-server.tsv (from make_items.py) into share/conf/item_proto.txt + item_names.txt.
Rows with the same vnum are replaced, so a rerun is idempotent. The db reads the tables only at boot:
restart db and every core afterwards. Usage: install_items.py <server root> <items-server.tsv> <fresh backup dir>
"""
import shutil,sys
from pathlib import Path
server,rows,backup=map(Path,sys.argv[1:4])
if backup.exists():raise SystemExit('use a fresh backup directory')
items={int(l.split(b'\t',1)[0]):l for l in rows.read_bytes().splitlines() if l}
backup.mkdir(parents=True)
conf=server/'share/conf'
for filename,row in (('item_proto.txt',lambda v:items[v]),('item_names.txt',lambda v:str(v).encode()+b'\t'+items[v].split(b'\t')[1])):
    path=conf/filename;raw=path.read_bytes();shutil.copy2(path,backup/filename)
    newline=b'\r\n' if b'\r\n' in raw else b'\n'
    kept=[l for l in raw.replace(b'\r\n',b'\n').split(b'\n') if l and not (l.split(b'\t',1)[0].isdigit() and int(l.split(b'\t',1)[0]) in items)]
    tmp=path.with_name(filename+'.tmp');tmp.write_bytes(newline.join(kept+[row(v) for v in sorted(items)])+newline);tmp.replace(path)
print('AVA2 items installed:',len(items),'backup:',backup)