#!/command/with-contenv bashio
# shellcheck disable=SC2191
# ==============================================================================
# Home Assistant Community Add-on: Prometheus
# Runs the Prometheus Server
# ==============================================================================
declare -a options
declare name
declare value

bashio::log.info 'Starting prometheus...'

options+=(--config.file="/etc/prometheus/prometheus.yml" )
options+=(--storage.tsdb.path="/data/prometheus" )
options+=(--web.console.libraries="/usr/share/prometheus/console_libraries" )
options+=(--web.console.templates="/usr/share/prometheus/consoles" )
options+=(--web.route-prefix="/" )
options+=(--web.external-url="http://localhost:9090$(bashio::addon.ingress_entry)/" )
options+=(--web.enable-lifecycle )

# Load custom environment variables
for var in $(bashio::config 'env_vars|keys'); do
    name=$(bashio::config "env_vars[${var}].name")
    value=$(bashio::config "env_vars[${var}].value")
    bashio::log.info "Setting ${name} to ${value}"
    export "${name}=${value}"
done

if ! bashio::fs.directory_exists /data/prometheus; then
  mkdir -p /data/prometheus
  chown prometheus:prometheus /data/prometheus
fi

if ! bashio::fs.directory_exists /share/prometheus/rules; then
  mkdir -p /share/prometheus/rules
  chown -R prometheus:prometheus /share/prometheus/rules
fi

if ! bashio::fs.directory_exists /share/prometheus/targets; then
  mkdir -p /share/prometheus/targets
  chown -R prometheus:prometheus /share/prometheus/targets
fi

yq -i eval-all '. as $item ireduce ({}; . * $item)' /etc/prometheus/prometheus.yml /share/prometheus/prometheus.yaml
# Run Prometheus
exec s6-setuidgid prometheus /usr/local/bin/prometheus "${options[@]}"