// Package middleware provides HTTP middleware for the API.
package middleware

import (
	"log/slog"
	"net/http"
	"runtime/debug"
)

// Recovery returns a middleware that recovers from panics, logs the stack trace, and returns 500.
func Recovery(logger *slog.Logger) func(next http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			defer func() {
				if err := recover(); err != nil {
					logger.Error(
						"panic recovered",
						slog.Any("error", err),
						slog.String("stack", string(debug.Stack())),
					)
					w.WriteHeader(http.StatusInternalServerError)
					w.Write([]byte("Internal Server Error"))
				}
			}()
			next.ServeHTTP(w, r)
		})
	}
}