#!/bin/bash

# Configuration
GOTIFY_URL="<YOUR_SERVER_URL>/message"  # Example: "http://gotify.example.com/message"
APP_TOKEN="<YOUR_APP_TOKEN>"
MESSAGE_TITLE="<YOUR_MESSAGE_TITLE>"
MESSAGE="<YOUR_MESSAGE>"
HOSTNAME=$(hostname)  # Get the hostname of the machine
TITLE="$HOSTNAME - $MESSAGE_TITLE"  # Title with hostname prefixing the message
PRIORITY=5  # Notification priority (1-5)
LOG_FILE="gotify_notifications.log"

# Function to log messages
log_message() {
    local message="$1"
    echo "$(date '+%Y-%m-%d %H:%M:%S') - $message" >> "$LOG_FILE"
}

# Function to check if the Gotify server is healthy
check_gotify_health() {
    local base_url="${GOTIFY_URL%/*}"  # Extract base URL (removes /message)
    local health_url="$base_url/health"  # Construct the health check URL
    local response

    # Make a request to the health endpoint and capture the response
    response=$(curl --silent --write-out "%{http_code}" --output /dev/null "$health_url")

    # Check if the response code is 200 (OK)
    if [ "$response" -eq 200 ]; then
        # Get the actual health status
        health_status=$(curl --silent "$health_url")
        echo "$health_status"
    else
        echo "Health check failed. HTTP status code: $response"
    fi
}

# Check if the Gotify server is healthy
health_check_result=$(check_gotify_health)
if [[ $health_check_result != *"\"health\":\"green\""* ]]; then
    log_message "Gotify server is down or not healthy: $health_check_result. Exiting."
    exit 1
fi

# Send notification
response=$(curl -s -o /dev/null -w "%{http_code}" -X POST "$GOTIFY_URL" \
-H "Content-Type: application/json" \
-H "X-Gotify-Key: $APP_TOKEN" \
-d "{
  \"title\": \"$TITLE\",
  \"message\": \"$MESSAGE\",
  \"priority\": $PRIORITY
}")

# Check response and log result
if [ "$response" -eq 200 ]; then
    log_message "Notification sent successfully: $MESSAGE"
else
    log_message "Failed to send notification. HTTP status code: $response. Title: $TITLE, Message: $MESSAGE, Priority: $PRIORITY"
fi