#!/usr/bin/env python3
"""Deploy public/ -> /dedinit.ru on Jino (SFTP-only, password auth).

Используется командой `make deploy` (единственный способ деплоя сайта).
Jino-аккаунт kpa39l_dedinit — SFTP-only: удалённый exec (rsync/ssh) запрещён,
поэтому заливаем через SFTP с рекурсивным mirror и --delete (как rsync).
Пароль — из env SSHPASS (см. README.md / DEPLOY_INSTRUCTIONS.md).
"""
import os
import stat as stmod
import sys

try:
    import paramiko
except ImportError:
    print("ОШИБКА: нет paramiko. Установите: pip install paramiko", file=sys.stderr)
    sys.exit(1)

HOST = os.environ.get("DEDINIT_HOST", "kpa39l.myjino.ru")
PORT = int(os.environ.get("DEDINIT_PORT", "2222"))
USER = os.environ.get("DEDINIT_USER", "kpa39l_dedinit")
PASS = os.environ.get("SSHPASS", "")
LOCAL = os.path.join(os.path.dirname(os.path.abspath(__file__)), "..", "public")
REMOTE = os.environ.get("DEDINIT_REMOTE", "/dedinit.ru")
DRYRUN = "--dry-run" in sys.argv

if not PASS:
    print("ОШИБКА: переменная SSHPASS (пароль SFTP) не задана. См. README.md / DEPLOY_INSTRUCTIONS.md", file=sys.stderr)
    sys.exit(1)

LOCAL = os.path.abspath(LOCAL)
if not os.path.isdir(LOCAL):
    print(f"ОШИБКА: нет каталога {LOCAL}. Сначала: make build", file=sys.stderr)
    sys.exit(1)

t = paramiko.Transport((HOST, PORT))
t.connect(username=USER, password=PASS)
sftp = paramiko.SFTPClient.from_transport(t)


def rlist(path):
    out = []
    try:
        entries = sftp.listdir_attr(path)
    except IOError:
        return out
    for e in entries:
        full = os.path.join(path, e.filename)
        rel = os.path.relpath(full, REMOTE)
        isdir = stmod.S_ISDIR(e.st_mode)
        out.append((rel, isdir))
        if isdir:
            out.extend(rlist(full))
    return out


print(f"Копирую {LOCAL} -> sftp://{USER}@{HOST}:{PORT}{REMOTE}/"
      + (" (DRY-RUN)" if DRYRUN else ""))

local_files = []
for root, dirs, files in os.walk(LOCAL):
    for f in files:
        local_files.append(os.path.relpath(os.path.join(root, f), LOCAL))

if not DRYRUN:
    remote_entries = rlist(REMOTE)
    remote_files = {r for r, d in remote_entries if not d}

for rel in sorted(local_files):
    if DRYRUN:
        print("  +", rel)
        continue
    lpath = os.path.join(LOCAL, rel)
    rpath = os.path.join(REMOTE, rel)
    rdir = os.path.dirname(rpath)
    cur = REMOTE
    for seg in os.path.relpath(rdir, REMOTE).split(os.sep):
        if not seg:
            continue
        cur = os.path.join(cur, seg)
        try:
            sftp.stat(cur)
        except IOError:
            try:
                sftp.mkdir(cur)
            except IOError:
                pass
    sftp.put(lpath, rpath)
    print("  +", rel)

if not DRYRUN:
    to_delete = remote_files - set(local_files)
    for rel in sorted(to_delete):
        try:
            sftp.remove(os.path.join(REMOTE, rel))
            print("  -", rel)
        except Exception as e:
            print("  !", rel, e)

sftp.close()
t.close()
print("Готово." if not DRYRUN else "DRY-RUN завершён: показаны изменения без заливки.")