package xrpc

import (
	"database/sql"
	"errors"
	"net/http"
	"strings"

	"tangled.org/core/api/tangled"
	xrpcerr "tangled.org/core/xrpc/errors"
)

func (x *Xrpc) ResolveAtUri(w http.ResponseWriter, r *http.Request) {
	atUri := r.URL.Query().Get("atUri")
	if atUri == "" || !strings.HasPrefix(atUri, "at://") {
		writeError(w, xrpcerr.NewXrpcError(
			xrpcerr.WithTag("InvalidRequest"),
			xrpcerr.WithMessage("missing or invalid atUri parameter"),
		), http.StatusBadRequest)
		return
	}

	repoDid, err := x.Db.ResolveAtUri(atUri)
	if errors.Is(err, sql.ErrNoRows) {
		writeError(w, xrpcerr.NewXrpcError(
			xrpcerr.WithTag("NotFound"),
			xrpcerr.WithMessage("no repo DID found for the given at-uri"),
		), http.StatusNotFound)
		return
	}
	if err != nil {
		writeError(w, xrpcerr.NewXrpcError(
			xrpcerr.WithTag("InternalError"),
			xrpcerr.WithMessage("failed to resolve at-uri"),
		), http.StatusInternalServerError)
		return
	}

	writeJson(w, tangled.RepoResolveAtUri_Output{Did: repoDid})
}