package plugin

import (
	"context"
	"net"
	"runtime"
	"strconv"
	"strings"

	"github.com/Neur0toxine/sshpoke/pkg/convert"
	"github.com/Neur0toxine/sshpoke/pkg/dto"
	"github.com/Neur0toxine/sshpoke/pkg/plugin/pb"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"
	"google.golang.org/protobuf/types/known/emptypb"
)

type Client struct {
	parent pb.PluginServiceClient
	token  string
	close  func() error
}

func NewClient(addr, token string) (*Client, error) {
	conn, err := grpc.Dial(normalizeAddr(addr), grpc.WithTransportCredentials(insecure.NewCredentials()))
	if err != nil {
		return nil, err
	}
	c := &Client{
		parent: pb.NewPluginServiceClient(conn),
		token:  token,
		close:  conn.Close,
	}
	runtime.SetFinalizer(c, connCloser)
	return c, nil
}

func (c *Client) Event(ctx context.Context) (*Stream, error) {
	stream, err := c.parent.Event(ctx, &emptypb.Empty{})
	if err != nil {
		return nil, err
	}
	return &Stream{stream: stream}, nil
}

func (c *Client) EventStatus(ctx context.Context, status dto.EventStatus) error {
	_, err := c.parent.EventStatus(ctx, convert.AppEventStatusToMessage(status))
	return err
}

func connCloser(c *Client) {
	_ = c.close()
}

func normalizeAddr(addr string) string {
	addr = strings.TrimSpace(addr)
	if strings.HasPrefix(addr, "grpc://") {
		addr = addr[7:]
	}
	host, port, err := net.SplitHostPort(addr)
	if err != nil && err.Error() == "missing port in address" {
		host, port, err = net.SplitHostPort(addr + ":" + strconv.Itoa(DefaultPort))
	}
	if err != nil {
		return ""
	}
	return host + ":" + port
}