#!/command/with-contenv bash
# shellcheck shell=bash
# Start the go2rtc service

set -o errexit -o nounset -o pipefail

# Tell S6-Overlay not to restart this service
s6-svc -O .

function get_ip_and_port_from_supervisor() {
    local ip_address
    # Example: 192.168.1.10/24
    local ip_regex='^([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})/[0-9]{1,2}$'
    if ip_address=$(
        curl -fsSL \
            -H "Authorization: Bearer ${SUPERVISOR_TOKEN}" \
            -H "Content-Type: application/json" \
            http://supervisor/network/interface/default/info |
            jq --exit-status --raw-output '.data.ipv4.address[0]'
    ) && [[ "${ip_address}" =~ ${ip_regex} ]]; then
        ip_address="${BASH_REMATCH[1]}"
        echo "[INFO] Got IP address from supervisor: ${ip_address}" >&2
    else
        echo "[WARN] Failed to get IP address from supervisor" >&2
        return 0
    fi

    local webrtc_port
    local port_regex='^([0-9]{1,5})$'
    if webrtc_port=$(
        curl -fsSL \
            -H "Authorization: Bearer ${SUPERVISOR_TOKEN}" \
            -H "Content-Type: application/json" \
            http://supervisor/addons/self/info |
            jq --exit-status --raw-output '.data.network["8555/tcp"]'
    ) && [[ "${webrtc_port}" =~ ${port_regex} ]]; then
        webrtc_port="${BASH_REMATCH[1]}"
        echo "[INFO] Got WebRTC port from supervisor: ${webrtc_port}" >&2
    else
        echo "[WARN] Failed to get WebRTC port from supervisor" >&2
        return 0
    fi

    export FRIGATE_GO2RTC_WEBRTC_CANDIDATE_INTERNAL="${ip_address}:${webrtc_port}"
}

echo "[INFO] Preparing go2rtc config..." >&2

if [[ -n "${SUPERVISOR_TOKEN:-}" ]]; then
    # Running as a Home Assistant add-on, infer the IP address and port
    get_ip_and_port_from_supervisor
fi

raw_config=$(python3 /usr/local/go2rtc/create_config.py)

echo "[INFO] Starting go2rtc..." >&2

# Replace the bash process with the go2rtc process, redirecting stderr to stdout
exec 2>&1
exec go2rtc -config="${raw_config}"