apiVersion: v1
kind: ConfigMap
metadata:
  name: vector-config
  namespace: {{ .Release.Namespace }}
  labels:
    app: vector
data:
  vector.toml: |
    # Vector config adapted from Log.md
    [sources.kubernetes_logs]
    type = "kubernetes_logs"
    include_namespaces = ["{{ .Values.vector.namespace }}"]
    # read pod/container logs under /var/log/pods
    host_path = "/var/log"

    [transforms.parse_json]
    type = "remap"
    inputs = ["kubernetes_logs"]
    source = '''
    parsed = parse_json!(.message)
    .ts = parsed.ts
    .level = parsed.level
    .app = parsed.app
    .env = parsed.env
    .traceId = parsed.traceId
    .uri = parsed.uri
    .uri_group = parsed.uri_group
    .duration_ms = to_int!(parsed.duration, 0)
    .userId = parsed.userId
    .event = parsed.event
    .error = parsed.error
    .status = parsed.status
    .event_class = parsed.event_class

    # fallback derive event_class from uri_group
    if starts_with(.uri_group, "/order") {
      .event_class = "order"
    } else if starts_with(.uri_group, "/payment") {
      .event_class = "payment"
    } else if !exists(.event_class) {
      .event_class = "api"
    }

    # keep kubernetes metadata as labels fields
    .k8s_ns = .kubernetes.namespace_name
    .k8s_pod = .kubernetes.pod_name
    .k8s_labels = .kubernetes.labels
    '''

    [transforms.filter_services]
    type = "filter"
    inputs = ["parse_json"]
    # keep only selected apps (based on k8s labels.app or parsed .app)
    condition = '(.kubernetes.labels.app in {{ toJson .Values.vector.logSelector }}) || (.app in {{ toJson .Values.vector.logSelector }})'

    [transforms.filter_levels]
    type = "filter"
    inputs = ["filter_services"]
    condition = '.level != "DEBUG" && .level != "TRACE"'

    [sinks.loki]
    type = "loki"
    inputs = ["filter_levels"]
    endpoint = "{{ .Values.vector.loki.endpoint }}"
    encoding.codec = "json"
    [sinks.loki.labels]
    env = "{{ env }}"
    app = "{{ app }}"
    level = "{{ level }}"
    event_class = "{{ event_class }}"
    uri_group = "{{ uri_group }}"
    status = "{{ status }}"

    [transforms.to_metrics]
    type = "log_to_metric"
    inputs = ["filter_levels"]

    # Counter: Total requests per app/uri_group/status
    [[transforms.to_metrics.metrics]]
    type = "counter"
    field = "message"
    name = "requests_total"
    tags.app = "{{ app }}"
    tags.env = "{{ env }}"
    tags.uri_group = "{{ uri_group }}"

    # Counter: HTTP request errors
    [[transforms.to_metrics.metrics]]
    type = "counter"
    field = "message"
    name = "requests_errors_total"
    filter.condition = '.status == "server_error" || .status == "client_error"'
    tags.app = "{{ app }}"
    tags.env = "{{ env }}"
    tags.status = "{{ status }}"

    # Histogram: Request duration (latency)
    [[transforms.to_metrics.metrics]]
    type = "histogram"
    field = "duration_ms"
    name = "request_duration_ms"
    tags.app = "{{ app }}"
    tags.uri_group = "{{ uri_group }}"
    tags.env = "{{ env }}"

    # Counter: Total orders
    [[transforms.to_metrics.metrics]]
    type = "counter"
    field = "message"
    name = "orders_total"
    filter.condition = '.event_class == "order"'
    tags.app = "{{ app }}"
    tags.env = "{{ env }}"

    # Counter: Failed orders
    [[transforms.to_metrics.metrics]]
    type = "counter"
    field = "message"
    name = "orders_failed_total"
    filter.condition = '.event_class == "order" && (.status == "server_error" || .status == "client_error")'
    tags.app = "{{ app }}"
    tags.env = "{{ env }}"

    # Counter: Payment events
    [[transforms.to_metrics.metrics]]
    type = "counter"
    field = "message"
    name = "payment_events_total"
    filter.condition = '.event_class == "payment"'
    tags.app = "{{ app }}"
    tags.env = "{{ env }}"

    [sinks.prometheus]
    type = "prometheus_exporter"
    inputs = ["to_metrics"]
    address = "{{ .Values.vector.prometheus.exporterAddress }}"
    default_namespace = "shop_recycle"