/*
 * Copyright (c) 2023 The GoPlus Authors (goplus.org). All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package langserver

import (
	"context"

	"github.com/goplus/gop/x/jsonrpc2"
)

// -----------------------------------------------------------------------------

const (
	methodGenGo   = "gengo"
	methodChanged = "changed"
)

// -----------------------------------------------------------------------------

// Dialer is used by clients to dial a server.
type Dialer = jsonrpc2.Dialer

type AsyncCall = jsonrpc2.AsyncCall

// Client is a client of the language server.
type Client struct {
	conn *jsonrpc2.Connection
}

// Open uses the dialer to make a new connection and returns a client of the LangServer
// based on the connection.
func Open(ctx context.Context, dialer Dialer, onDone func()) (ret Client, err error) {
	c, err := jsonrpc2.Dial(ctx, dialer, jsonrpc2.BinderFunc(
		func(ctx context.Context, c *jsonrpc2.Connection) (ret jsonrpc2.ConnectionOptions) {
			return
		}), onDone)
	if err != nil {
		return
	}
	ret = Client{c}
	return
}

func (p Client) Close() error {
	return p.conn.Close()
}

func (p Client) AsyncGenGo(ctx context.Context, pattern ...string) *AsyncCall {
	return p.conn.Call(ctx, methodGenGo, pattern)
}

func (p Client) GenGo(ctx context.Context, pattern ...string) (err error) {
	return p.AsyncGenGo(ctx, pattern...).Await(ctx, nil)
}

func (p Client) Changed(ctx context.Context, files ...string) (err error) {
	return p.conn.Notify(ctx, methodChanged, files)
}

// -----------------------------------------------------------------------------