//=============================================================================
// GRAFANA ALLOY - PUERTA DE ENTRADA ÚNICA DE OBSERVABILIDAD
//=============================================================================

//=============================================================================
// PROMETHEUS - MÉTRICAS
//=============================================================================

// Scraping del propio Alloy
prometheus.scrape "alloy" {
  targets = [{"__address__" = "localhost:12345"}]
  forward_to = [prometheus.remote_write.prometheus.receiver]
  scrape_interval = "15s"
  metrics_path = "/metrics"
  job_name = "alloy"
}

// Scraping de Prometheus
prometheus.scrape "prometheus" {
  targets = [{"__address__" = "prometheus:9090"}]
  forward_to = [prometheus.remote_write.prometheus.receiver]
  scrape_interval = "15s"
  metrics_path = "/metrics"
  job_name = "prometheus"
}

// Scraping de Grafana
prometheus.scrape "grafana" {
  targets = [{"__address__" = "grafana:3000"}]
  forward_to = [prometheus.remote_write.prometheus.receiver]
  scrape_interval = "30s"
  metrics_path = "/metrics"
  job_name = "grafana"
}

// Scraping de Loki
prometheus.scrape "loki" {
  targets = [{"__address__" = "loki:3100"}]
  forward_to = [prometheus.remote_write.prometheus.receiver]
  scrape_interval = "15s"
  metrics_path = "/metrics"
  job_name = "loki"
}

// Scraping de Tempo
prometheus.scrape "tempo" {
  targets = [{"__address__" = "tempo:3200"}]
  forward_to = [prometheus.remote_write.prometheus.receiver]
  scrape_interval = "15s"
  metrics_path = "/metrics"
  job_name = "tempo"
}

// Receptor para métricas externas
prometheus.receive_http "external_metrics" {
  http {
    listen_address = "0.0.0.0"
    listen_port = 9999
  }
  forward_to = [prometheus.remote_write.prometheus.receiver]
}

// Remote write hacia Prometheus
prometheus.remote_write "prometheus" {
  endpoint {
    url = "http://prometheus:9090/api/v1/write"
  }
}

//=============================================================================
// LOKI - LOGS
//=============================================================================

// Descubrimiento de contenedores Docker
discovery.docker "docker_logs" {
  host = "unix:///var/run/docker.sock"
  refresh_interval = "5s"
}

// Fuente de logs de contenedores Docker
loki.source.docker "containers" {
  host = "unix:///var/run/docker.sock"
  targets = discovery.docker.docker_logs.targets
  refresh_interval = "5s"
  forward_to = [loki.relabel.docker.receiver]
}

// Relabel para contenedores Docker
loki.relabel "docker" {
  forward_to = [loki.write.loki.receiver]

  rule {
    source_labels = ["__meta_docker_container_name"]
    target_label  = "container"
  }

  rule {
    source_labels = ["__meta_docker_container_image"]
    target_label  = "image"
  }
}

// Receptor HTTP para logs externos (como tus logs Python)
loki.source.api "external_logs" {
  http {
    listen_address = "0.0.0.0"
    listen_port = 3101
  }

  // ⚙️ Enviar los logs directamente al escritor Loki
  forward_to = [loki.write.loki.receiver]
}

// Receptor Syslog para logs del sistema
loki.source.syslog "system_logs" {
  listener {
    address = "0.0.0.0:1514"
    protocol = "tcp"
  }
  forward_to = [loki.relabel.syslog.receiver]
}

// Relabel para logs del sistema
loki.relabel "syslog" {
  forward_to = [loki.write.loki.receiver]

  rule {
    source_labels = ["__syslog_message_hostname"]
    target_label  = "hostname"
  }
}

// Cliente Loki - destino final
// ⚠️ Sin http_headers (no soportado aún en Alloy estable)
loki.write "loki" {
  endpoint {
    url = "http://loki:3100/loki/api/v1/push"
  }
}

//=============================================================================
// TEMPO - TRAZAS
//=============================================================================

// Receptor OTLP
otelcol.receiver.otlp "tempo" {
  grpc {
    endpoint = "0.0.0.0:4317"
  }
  http {
    endpoint = "0.0.0.0:4318"
  }
  output {
    traces = [otelcol.processor.batch.tempo.input]
  }
}

// Receptor Jaeger
otelcol.receiver.jaeger "jaeger_traces" {
  protocols {
    grpc {
      endpoint = "0.0.0.0:14250"
    }
    thrift_http {
      endpoint = "0.0.0.0:14268"
    }
    thrift_compact {
      endpoint = "0.0.0.0:6831"
    }
  }
  output {
    traces = [otelcol.processor.batch.tempo.input]
  }
}

// Receptor Zipkin
otelcol.receiver.zipkin "zipkin_traces" {
  endpoint = "0.0.0.0:9411"
  output {
    traces = [otelcol.processor.batch.tempo.input]
  }
}

// Procesador batch
otelcol.processor.batch "tempo" {
  send_batch_size = 1024
  timeout = "1s"
  output {
    traces = [otelcol.exporter.otlp.tempo.input]
  }
}

// Exportador a Tempo
otelcol.exporter.otlp "tempo" {
  client {
    endpoint = "http://tempo:4317"
    tls {
      insecure = true
    }
  }
}

//=============================================================================
// CONFIGURACIÓN GENERAL
//=============================================================================

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