package httpserver

import (
	"bufio"
	"fmt"
	"net"
	"net/http"
	"time"

	"github.com/go-chi/chi/v5/middleware"
)

func (s *Server) timeoutExceptWebSocket(timeout time.Duration) func(http.Handler) http.Handler {
	timeoutMiddleware := middleware.Timeout(timeout)
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			if r.URL.Path == "/ws" {
				next.ServeHTTP(w, r)
				return
			}
			timeoutMiddleware(next).ServeHTTP(w, r)
		})
	}
}

func (s *Server) requestLogger(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		ww := &statusWriter{ResponseWriter: w, status: http.StatusOK}
		start := time.Now()
		next.ServeHTTP(ww, r)
		s.logger.Info("http request",
			"method", r.Method,
			"path", r.URL.Path,
			"status", ww.status,
			"duration", time.Since(start).String(),
		)
	})
}

func (s *Server) securityHeaders(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Security-Policy", "default-src 'self'; base-uri 'self'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline' https://cdn.jsdelivr.net; script-src 'self' https://cdn.jsdelivr.net; font-src 'self' https://cdn.jsdelivr.net; connect-src 'self' ws: wss:; object-src 'none'")
		w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
		w.Header().Set("X-Content-Type-Options", "nosniff")
		w.Header().Set("X-Frame-Options", "DENY")
		w.Header().Set("Cross-Origin-Opener-Policy", "same-origin")
		w.Header().Set("Cross-Origin-Resource-Policy", "same-origin")
		next.ServeHTTP(w, r)
	})
}

type statusWriter struct {
	http.ResponseWriter
	status int
}

func (w *statusWriter) WriteHeader(status int) {
	w.status = status
	w.ResponseWriter.WriteHeader(status)
}

func (w *statusWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
	hijacker, ok := w.ResponseWriter.(http.Hijacker)
	if !ok {
		return nil, nil, fmt.Errorf("response writer does not support hijacking")
	}
	return hijacker.Hijack()
}