package middleware

import (
	"net/http"

	"go.uber.org/zap"
)

// PydicomAPIKey validates requests to pydicom endpoints by checking the API key
func PydicomAPIKey(apiKey string, logger *zap.Logger) func(http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			// Check if the API key header is present
			providedKey := r.Header.Get("X-PYDICOM-API-KEY")
			if providedKey == "" {
				logger.Warn("API key missing from PYDICOM request")
				http.Error(w, "API key required", http.StatusUnauthorized)
				return
			}

			// Validate the API key
			if providedKey != apiKey {
				logger.Warn("Invalid API key for PYDICOM request")
				http.Error(w, "Invalid API key", http.StatusUnauthorized)
				return
			}

			// API key is valid, proceed to the next handler
			next.ServeHTTP(w, r)
		})
	}
}