#!/bin/bash

#set -x

HEADER="--header=accept:image/webp,*/*;q=0.8 \
--header=accept-encoding:gzip,deflate,sdch \
--header=accept-language:cs-CZ,cs;q=0.8"

UA="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)  Chrome/31.0.1650.63 Safari/537.36"
R="--referer=https://maps.google.com/"

FCOOK="--cookies=on --keep-session-cookies --save-cookies=/tmp/testcookie.txt"
SCOOK="--cookies=on --load-cookies=testcookie.txt --keep-session-cookies --save-cookies=/tmp/testcookie.txt"

function logit() {
  echo `date "+%Y/%m/%d %H:%M:%S"` $@
}

function init_down() {
  wget $HEADER -U "$UA" $FCOOK http://maps.google.com -O /tmp/firstout.html 2> /tmp/wget.out
  if [ $? != 0 ]
  then
     echo "Something wrong with wget, returned $?:"
     cat /tmp/wget.out
     exit 1
  fi
}

function down_link() {
  wget $HEADER -U "$UA" $R $SCOOK $2 -O /tmp/$1 2> /tmp/wget.out
  if [ $? != 0 ]
  then
     echo "Something wrong with wget, returned $?:"
     cat /tmp/wget.out
     exit 1
  fi
}

function down_square() {
  X=$1
  Y=$2

  logit "Downloading square ($X,$Y) files"

  xi=$X
  yi=$((131064-Y))

  for i in `seq 0 7`;
  do
    for j in `seq 0 7`;
    do
      down_link g2xpl_8_17_${X}_${Y}-${xi}-${yi}.jpg "https://khms0.google.com/kh/v=145&src=app&x=$xi&y=$yi&z=17&s=Gali"
      xi=$((xi+1))
    done
    xi=$X
    yi=$((yi+1))
  done
}

function join_square() {
  X=$1
  Y=$2

  xi=$X
  yi=$((131064-Y))

  logit "Merging square ($X,$Y) files"
  
  FL=""
  for i in `seq 0 7`;
  do
    for j in `seq 0 7`;
    do
      FL="$FL g2xpl_8_17_${X}_${Y}-${xi}-${yi}.jpg"
      xi=$((xi+1))
    done
    xi=$X
    yi=$((yi+1))
  done

  [ -e /tmp/gx2pl_finished ] || mkdir /tmp/gx2pl_finished

  montage -mode concatenate -tile 8x8 $FL /tmp/gx2pl_finished/g2xpl_8_17_${X}_${Y}.jpg
  if [ $? != 0 ]
  then
     echo "Something wrong with montage, returned $?:"
     exit 1
  fi

  rm $FL
}

function usage() {
  echo "./script.sh <X> <Y> [ <X2> <Y2> ]"
  echo "X,Y     dds zl17 coordinates"
  echo "X2,Y2   dds zl17 coordinates for range X,Y - X2,Y2"
}

if [ $# != 2 ] && [ $# != 4 ]
then
  usage
  exit
fi

cd /tmp

if [ $# ==  2 ]
then
  #init_down 
  #down_square $1 $2
  #join_square $1 $2
  echo something
fi

if [ $# == 4 ]
then

  for x in `seq $1 8 $3`
  do
    for y in `seq $2 8 $4`
    do
      init_down
      down_square $x $y
      join_square $x $y
    done
  done

fi