logging {
  level  = "info"
  format = "logfmt"
}

//===
// Metrics
//===
prometheus.exporter.self "default" {
}
prometheus.exporter.unix "default" {
}
prometheus.scrape "exporters" {
  targets    = concat(
    prometheus.exporter.self.default.targets,
    prometheus.exporter.unix.default.targets,
  )
  forward_to = [
    otelcol.receiver.prometheus.default.receiver,
  ]
}

//===
// Logs
//===
loki.relabel "journal" {
  forward_to = []

  rule {
    source_labels = ["__journal__systemd_unit"]
    target_label  = "journal.unit"
  }
}

loki.source.journal "default" {
  forward_to    = [loki.process.drop_old.receiver]
  relabel_rules = loki.relabel.journal.rules
}
loki.process "drop_old" {
  stage.drop {
    older_than          = "1h"
    drop_counter_reason = "too old"
  }
  forward_to = [
    otelcol.receiver.loki.default.receiver,
  ]
}

//===
// OTEL
//===
otelcol.receiver.prometheus "default" {
  output {
    metrics = [otelcol.processor.attributes.default.input]
  }
}
otelcol.receiver.loki "default" {
  output {
    logs = [otelcol.processor.attributes.default.input]
  }
}
otelcol.processor.attributes "default" {
  output {
    metrics = [otelcol.processor.resourcedetection.default.input]
    logs    = [otelcol.processor.resourcedetection.default.input]
    traces  = [otelcol.processor.resourcedetection.default.input]
  }
}
otelcol.processor.resourcedetection "default" {
  // https://github.com/grafana/alloy/issues/1626
  // detectors = ["env", "system"]
  detectors = ["env"]
  output {
    metrics = [otelcol.processor.transform.default.input]
    logs    = [otelcol.processor.transform.default.input]
    traces  = [otelcol.processor.transform.default.input]
  }
}
otelcol.processor.transform "default" {
  error_mode = "ignore"

  metric_statements {
    context = "datapoint"
    statements = [
      `set(attributes["node"], resource.attributes["node"])`,
    ]
  }

  output {
    metrics = [otelcol.processor.batch.default.input]
    logs    = [otelcol.processor.batch.default.input]
    traces  = [otelcol.processor.batch.default.input]
  }
}
otelcol.processor.batch "default" {
  timeout = "10s"
  output {
    metrics = [otelcol.exporter.otlp.default.input]
    logs    = [otelcol.exporter.otlp.default.input]
    traces  = [otelcol.exporter.otlp.default.input]
  }
}
otelcol.auth.oauth2 "default" {
  token_url = "https://id.tjo.space/application/o/token/"
  client_id = "Vlw69HXoTJn1xMQaDX71ymGuLVoD9d2WxscGhksh"
  client_secret = "none"
  endpoint_params = {
    grant_type = ["client_credentials"],
    username = [env("ALLOY_USERNAME")],
    password = [env("ALLOY_PASSWORD")],
  }
}
otelcol.exporter.otlp "default" {
  client {
    endpoint = "grpc.otel.monitor.tjo.cloud:443"
    auth = otelcol.auth.oauth2.default.handler
  }
}