#!/bin/bash

# Script: get_grafana_logs.sh
# Description: Finds the Grafana pod and displays its logs in real-time.
# Usage: ./get_grafana_logs.sh [namespace]

# --- Configuration (can be overridden by command-line argument) ---
GRAFANA_NAMESPACE="${1:-monitoring}" # Default to 'monitoring' if no argument provided

# --- Main Logic ---

echo "Searching for Grafana pod in namespace '$GRAFANA_NAMESPACE'..."

# Find the Grafana pod name. Use `head -n 1` in case multiple pods match,
# we'll take the first one. `2>/dev/null` suppresses kubectl errors if no pod is found.
GRAFANA_POD=$(kubectl get pods -n "$GRAFANA_NAMESPACE" -l app.kubernetes.io/name=grafana -o jsonpath='{.items[0].metadata.name}' 2>/dev/null)

if [ -z "$GRAFANA_POD" ]; then
    echo "Error: Grafana pod not found in namespace '$GRAFANA_NAMESPACE'."
    echo "Please ensure Grafana is deployed and running, and the namespace is correct."
    exit 1
fi

echo "Found Grafana pod: $GRAFANA_POD"
echo "--- Displaying real-time logs (Ctrl+C to stop) ---"

# Display logs. `--follow` streams real-time logs.
kubectl logs "$GRAFANA_POD" -n "$GRAFANA_NAMESPACE" --follow

if [ $? -ne 0 ]; then
    echo "Error: Could not retrieve logs for pod '$GRAFANA_POD'."
    echo "Check kubectl permissions or if the pod is actually running and healthy."
    exit 1
fi

echo "Logs stream ended."
