#!/bin/bash

stty eof undef
stty intr undef

hostsystem="$( cat /etc/bmchost )"
bmcd_cmdpipe="/run/bmcd/bmcd.cmd"
bmcd_statepipe="/run/bmcd/bmcd.state"

help() {
        echo -e "Available commands:"
        echo -e "  \e[1mstate\e[0m - Show the system power state"
        echo -e "  \e[1mconsole\e[0m - Connect to host via serial console; ^A+D to disconnect"
        echo -e "  \e[1mpower\e[0m - Press power switch on host"
        echo -e "  \e[1mreset\e[0m - Press reset switch on host"
        echo -e "  \e[1mkill\e[0m - Forcibly power off host"
        echo -e "  \e[1mlocate\e[0m - Enable locator (flash power LED)"
        echo -e "  \e[1munlocate\e[0m - Disable locator"
        echo -e "  \e[1mhelp\e[0m - This help menu"
        echo -e "  \e[1mbmc\e[0m - Show BMC information"
        echo -e "  \e[1mhostname\e[0m - Set BMC hostname"
        echo -e "  \e[1mpassword\e[0m - Set BMC password"
        echo -e "  \e[1mshell\e[0m - Start a BMC bash shell"
        echo -e "  \e[1mexit/logout\e[0m - Disconnect from the BMC"
}
bmcinfo() {
        echo -e "BMC information:"
        echo -e "  IP address: $( ip -4 addr list eth0 | grep inet | awk '{ print $2 }' )"
        echo -e "  Hostname: $( hostname )"
        echo -e "  BMC temperature: $( sudo /opt/vc/bin/vcgencmd measure_temp | awk -F'=' '{ print $2 }' )"
}
sethostname() {
        echo -n "Enter new hostname: "
        read newhostname
        sudo sed -i '/^127.0.1.1/d' /etc/hosts &>/dev/null
        sudo tee -a /etc/hosts <<<"127.0.1.1 $newhostname" &>/dev/null
        sudo hostname $newhostname &>/dev/null
        sudo tee /etc/hostname <<<"$newhostname" &>/dev/null
        echo "Hostname set to $newhostname"
}
setpassword() {
        echo -n "Enter new BMC password: "
        read -s password_1
        echo
        echo -n "Reenter new BMC password: "
        read -s password_2
        echo
        if [ "${password_1}" == "${password_2}" ]; then
                echo -n "Setting BMC password... "
                sudo chpasswd <<<"bmc:${password_1}"
                echo "done."
        else
                echo "Passwords to not match!"
        fi
}
resetsw_press() {
        echo "Pressing reset switch."
	echo "resetsw_press" > ${bmcd_cmdpipe}
}
powersw_press() {
	echo "Holding power switch."
	echo "powersw_hold" > ${bmcd_cmdpipe}
        sleep 2
}
powersw_hold() {
	echo "Pressing power switch."
	echo "powersw_press" > ${bmcd_cmdpipe}
        sleep 2
}
locate_on() {
	echo "Enabling locator - host power LED will flash."
	echo "locate_on" > ${bmcd_cmdpipe}
}
locate_off() {
	echo "Disabling locator."
	echo "locate_off" > ${bmcd_cmdpipe}
}
readpower() {
        powerstate_raw=$(cat ${bmcd_statepipe})
        if [ "${powerstate_raw}" -eq 1 ]; then
                powerstate="\e[32mOn\e[0m"
        else
                powerstate="\e[31mOff\e[0m"
        fi
}

readpower
echo
echo -e "--------------------"
echo -e "| Raspberry Pi BMC |"
echo -e "--------------------"
echo
echo -e "Host system: \e[1m${hostsystem}\e[0m"
echo -e "Host state: $powerstate"
echo
help
echo
while true; do
stty eof undef
stty intr undef
echo -en "\e[1m\e[34m[$(hostname)]>\e[0m "
read input
case $input in
        'state')
                readpower
                echo -e "Host state: $powerstate"
                echo
        ;;
        'console')
                echo "Starting console..."
		# Connect to screen, or start it
                sudo screen -r serialconsole &>/dev/null || sudo screen -S serialconsole /dev/ttyUSB0 115200
		# If the user killed screen, restart it - just in case
		pgrep screen &>/dev/null || sudo screen -S serialconsole /dev/ttyUSB0 115200
                echo
        ;;
        'powersw')
                powersw_press
                readpower
                echo -e "Host state: $powerstate"
                echo
        ;;
        'resetsw')
                resetsw_press
                readpower
                echo -e "Host state: $powerstate"
                echo
        ;;
        'kill')
                powersw_hold
                readpower
                echo -e "Host state: $powerstate"
                echo
	;;
	'locate')
		locate_on
		echo
	;;
	'unlocate')
		locate_off
		echo	
        ;;
        'help')
                help
                echo
        ;;
        'bmc')
                bmcinfo
                echo
        ;;
        'hostname')
                sethostname
                echo
        ;;
        'password')
                setpassword
                echo
        ;;
        'shell')
                stty sane
                /bin/bash
                help
                echo
        ;;
        'exit'|'logout')
                exit 0
        ;;
        '')
                continue
        ;;
        *)
                echo "Invalid command."
                echo
        ;;
esac
done