package health

import (
	"encoding/json"
	"net/http"
	"os"
)

// Handler provides a health check endpoint that verifies the data volume is mounted
func Handler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")

	// Check if /data directory exists
	if _, err := os.Stat("/data"); os.IsNotExist(err) {
		w.WriteHeader(http.StatusServiceUnavailable)
		json.NewEncoder(w).Encode(map[string]string{
			"status": "unhealthy",
			"reason": "data volume not mounted",
		})
		return
	}

	// All checks passed
	w.WriteHeader(http.StatusOK)
	json.NewEncoder(w).Encode(map[string]string{
		"status": "healthy",
	})
}