#!/command/with-contenv bash
# shellcheck shell=bash
# Start the NGINX service

set -o errexit -o nounset -o pipefail

# Logs should be sent to stdout so that s6 can collect them

echo "[INFO] Starting NGINX..."

function set_worker_processes() {
    # Capture number of assigned CPUs to calculate worker processes
    local proc_count

    if proc_count=$(nproc --all) && [[ $proc_count -gt 4 ]]; then
        proc_count=4;
    fi

    # we need to catch any errors because sed will fail if user has bind mounted a custom nginx file
    sed -i "s/worker_processes auto;/worker_processes ${proc_count};/" /usr/local/nginx/conf/nginx.conf || true
}

set_worker_processes

# ensure the directory for ACME challenges exists
mkdir -p /etc/letsencrypt/www

# Create self signed certs if needed
letsencrypt_path=/etc/letsencrypt/live/frigate
mkdir -p $letsencrypt_path

if [ ! \( -f "$letsencrypt_path/privkey.pem" -a -f "$letsencrypt_path/fullchain.pem" \) ]; then
    echo "[INFO] No TLS certificate found. Generating a self signed certificate..."
    openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 \
        -subj "/O=FRIGATE DEFAULT CERT/CN=*" \
        -keyout "$letsencrypt_path/privkey.pem" -out "$letsencrypt_path/fullchain.pem"
fi

# Replace the bash process with the NGINX process, redirecting stderr to stdout
exec 2>&1
exec \
    s6-notifyoncheck -t 30000 -n 1 \
    nginx