package rpc

import (
	"context"
	"net/http"

	"github.com/gorilla/mux"

	// logging "github.com/ipfs/go-log/v2"
	"github.com/filecoin-project/go-jsonrpc"
	"github.com/filecoin-project/go-jsonrpc/auth"

	"github.com/filecoin-project/lotus/api"
	"github.com/filecoin-project/lotus/lib/rpcenc"
	"github.com/filecoin-project/lotus/metrics/proxy"
)

//var log = logging.Logger("lp/rpc")

func LotusProviderHandler(
	authv func(ctx context.Context, token string) ([]auth.Permission, error),
	remote http.HandlerFunc,
	a api.LotusProvider,
	permissioned bool) http.Handler {
	mux := mux.NewRouter()
	readerHandler, readerServerOpt := rpcenc.ReaderParamDecoder()
	rpcServer := jsonrpc.NewServer(jsonrpc.WithServerErrors(api.RPCErrors), readerServerOpt)

	wapi := proxy.MetricedAPI[api.LotusProvider, *api.LotusProviderStruct](a)
	if permissioned {
		wapi = api.PermissionedAPI[api.LotusProvider, *api.LotusProviderStruct](wapi)
	}

	rpcServer.Register("Filecoin", wapi)
	rpcServer.AliasMethod("rpc.discover", "Filecoin.Discover")

	mux.Handle("/rpc/v0", rpcServer)
	mux.Handle("/rpc/streams/v0/push/{uuid}", readerHandler)
	mux.PathPrefix("/remote").HandlerFunc(remote)
	mux.PathPrefix("/").Handler(http.DefaultServeMux) // pprof

	if !permissioned {
		return mux
	}

	ah := &auth.Handler{
		Verify: authv,
		Next:   mux.ServeHTTP,
	}
	return ah
}