#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import os
import sys

sys.path.append(os.path.dirname(os.path.abspath(__file__)))
import gateway
from gateway import die
import read_info


gw = gateway.Gateway()

dev = read_info.DevInfo(verbose = 0, infolevel = 1)
dev.get_dmesg()
dev.get_part_table()
if not dev.partlist or len(dev.partlist) <= 1:
  die("Partition list is empty!")

fn_dir    = 'backups/'
fn_old    = fn_dir + 'full_dump.old'
fn_local  = fn_dir + 'full_dump.bin'
fn_remote = '/tmp/mtd_dump.bin'
a_part = None
pid = None
if len(sys.argv) > 1:
  for p, part in enumerate(dev.partlist):
    print('  %2d > addr: 0x%08X  size: 0x%08X  name: "%s"' % (p, part['addr'], part['size'], part['name']))
  print(" ")
  a_part = input("Enter partition name or mtd number: ")
  if a_part != 'a':
    if isinstance(a_part, int):
      p = a_part
      if p < 0 or p >= len(dev.partlist):
        die('Partition "mtd{}" not found!'.format(a_part))
    else:
      p = dev.get_part_num(a_part, comptype = 'ends')
      if p < 0:
        die('Partition "{}" not found!'.format(a_part))
    name = dev.partlist[p]['name']
    name = ''.join(e for e in name if e.isalnum())
    fn_old    = fn_dir + 'mtd{id}_{name}.old'.format(id=p, name=name)
    fn_local  = fn_dir + 'mtd{id}_{name}.bin'.format(id=p, name=name)
    pid = p

os.makedirs(fn_dir, exist_ok = True)

if pid is None and a_part != 'a':
  for p, part in enumerate(dev.partlist):
    if part['addr'] == 0 and part['size'] > 0x00800000:  # 8MiB
      pid = p
      name = dev.partlist[p]['name']  # "ALL"
      name = ''.join(e for e in name if e.isalnum())
      addr = dev.partlist[p]['addr']
      size = dev.partlist[p]['size']
      break

if pid is not None:
  if os.path.exists(fn_dir): 
    if os.path.exists(fn_local): 
      if os.path.exists(fn_old):
        os.remove(fn_old)
      os.rename(fn_local, fn_old)
  if a_part is None:
    print("Full backup creating...")
  gw.run_cmd("dd if=/dev/mtd{id} of={o}".format(id=pid, o=fn_remote))
  print('Dump of partition "{}" created!'.format(name))
  print('Download dump to file "./{}"...'.format(fn_local))
  gw.download(fn_remote, fn_local, verbose = 0)
  print("Completed!")
  gw.run_cmd("rm -f " + fn_remote)
  print(" ")
  if a_part is None:
    print('Full backup saved to file "./{}"'.format(fn_local))
  else:
    print('Backup of "{}" saved to file "./{}"'.format(name, fn_local))
else:
  print("Full backup creating...")
  for p, part in enumerate(dev.partlist):
    if part['addr'] == 0 and part['size'] > 0x00800000:  # 8MiB
      continue  # skip "ALL" part
    name = dev.partlist[p]['name']
    name = ''.join(e for e in name if e.isalnum())
    addr = dev.partlist[p]['addr']
    size = dev.partlist[p]['size']
    fn_old    = fn_dir + 'mtd{id}_{name}.old'.format(id=p, name=name)
    fn_local  = fn_dir + 'mtd{id}_{name}.bin'.format(id=p, name=name)    
    if os.path.exists(fn_dir): 
      if os.path.exists(fn_local): 
        if os.path.exists(fn_old):
          os.remove(fn_old)
        os.rename(fn_local, fn_old)
    gw.run_cmd("dd if=/dev/mtd{id} of={o}".format(id=p, o=fn_remote))
    print('Download dump to file "./{}"...'.format(fn_local))
    try:
      gw.download(fn_remote, fn_local, verbose = 0)
    except Exception:
      print('Remote file "{}" not found!'.format(fn_remote))
      continue
    gw.run_cmd("rm -f " + fn_remote)
    print('Backup of "{}" saved to file "./{}"'.format(name, fn_local))
  print(" ")
  print("Completed!")