package app

import (
	"fmt"
	"net"
	"net/http"

	"github.com/casbin/casbin/v3"
	"github.com/xlgmokha/x/pkg/x"
	"gitlab.com/mokhax/spike/pkg/authz"
	"gitlab.com/mokhax/spike/pkg/cfg"
	"gitlab.com/mokhax/spike/pkg/srv"
)

func WithCasbin() authz.Authorizer {
	enforcer := x.Must(casbin.NewEnforcer("model.conf", "policy.csv"))

	return authz.AuthorizerFunc(func(r *http.Request) bool {
		host, _, err := net.SplitHostPort(r.Host)
		if err != nil {
			return false
		}

		subject, found := authz.TokenFrom(r).Subject()
		if !found {
			subject = "*"
		}
		ok, err := enforcer.Enforce(subject, host, r.Method, r.URL.Path)
		if err != nil {
			fmt.Printf("%v\n", err)
			return false
		}

		fmt.Printf("%v: %v -> %v %v%v\n", ok, subject, r.Method, host, r.URL.Path)
		return ok
	})
}

func Start(bindAddr string) error {
	return srv.Run(cfg.New(
		bindAddr,
		cfg.WithMux(authz.HTTP(WithCasbin(), Routes())),
	))
}