#!/bin/bash

# setup mining commands
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
scryptminer="SCRYPT MINER COMMAND INCLUDING OPTIONS"
groestlminer="GROESTL MINER COMMAND INCLUDING OPTIONS"
skeinminer="SKEIN MINER COMMAND INCLUDING OPTIONS"

# get block explorer and save profitability of GPU algos to file (rounding to whole numbers)
curl -s http://myriad.theblockexplorer.com/ | grep "Coins/Scrypt MH:" | sed 's/^.*Coins\/Scrypt MH:<br> //' | sed 's/\..*$//' > /tmp/profit.txt

# extract profitability into array
s=$(</tmp/profit.txt)
set -- $s
echo "Scrypt:  $1"
echo "Groestl: $2"
echo "Skein:   $3"
echo "Qubit:   $4"

# this line sets qubit to 0 so we never mine it (comment out if you want to start mining this algo)
set -- "${@:1:3}" "0"

echo "Adjusted profits $@"

# search for max profit
count=0
max=0
winner=0
for n in "$@" ; do
    count=$[count + 1]
    if [ $n -gt $max ]
    then
        max=$n
        winner=$count
    fi
done

# now we know which algo is winning, switch to mining it
case "$winner" in
    1) echo "Switching to Scrypt"
       killall cgminer
       killall sgminer
       sleep 3
       /usr/bin/screen -d -m -S miner $scryptminer &
       ;;
    2) echo "Switching to Groestl"
       killall cgminer
       killall sgminer
       sleep 3
       /usr/bin/screen -d -m -S miner $groestlminer &
       ;;
    3) echo "Switching to Skein"
       killall cgminer
       killall sgminer
       sleep 3
       /usr/bin/screen -d -m -S miner $skeinminer &
       ;;
    4) echo "Switching to Qubit"
       ;;
esac

chmod +x /usr/local/bin/profit

0 * * * *	/usr/local/bin/profit