#!/bin/sh
set -e

# Normalize the input for DISABLE_IPV6 to lowercase
DISABLE_IPV6_LOWER=$(echo "$DISABLE_IPV6" | tr '[:upper:]' '[:lower:]')

# Check for different representations of 'true' and set BIND_CONFIG
case "$DISABLE_IPV6_LOWER" in
1 | true | yes)
    BIND_CONFIG=":2375"
    ;;
*)
    BIND_CONFIG="[::]:2375 v4v6"
    ;;
esac

# Create required directories
mkdir -p /var/lib/haproxy

# Process the HAProxy configuration templates
sed -i "s/\${BIND_CONFIG}/$BIND_CONFIG/g" /usr/local/etc/haproxy/haproxy.cfg
sed -i "s|\${SOCKET_PATH}|$SOCKET_PATH|g" /usr/local/etc/haproxy/haproxy.cfg

# Test socket connectivity
if ! timeout 5 socat -t 1 UNIX-CONNECT:$SOCKET_PATH PIPE 2>/dev/null; then
    echo "Warning: Could not connect to Docker socket!"
fi

# first arg is `-f` or `--some-option`
if [ "${1#-}" != "$1" ]; then
    set -- haproxy "$@"
fi

if [ "$1" = 'haproxy' ]; then
    shift # "haproxy"
    # if the user wants "haproxy", let's add a couple useful flags
    #   -W  -- "master-worker mode" (similar to the old "haproxy-systemd-wrapper"; allows for reload via "SIGUSR2")
    #   -db -- disables background mode
    set -- haproxy -W -db "$@"
fi

exec "$@"