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package sync
import (
"fmt"
"net"
"time"
"vpnem/internal/models"
)
// HealthCheck tests if a server's proxy port is reachable.
func HealthCheck(server models.Server, timeout time.Duration) error {
addr := fmt.Sprintf("%s:%d", server.Server, server.ServerPort)
conn, err := net.DialTimeout("tcp", addr, timeout)
if err != nil {
return fmt.Errorf("server %s unreachable: %w", server.Tag, err)
}
conn.Close()
return nil
}
// FindHealthyServer returns the first healthy non-RU server from the list.
func FindHealthyServer(servers []models.Server, timeout time.Duration) *models.Server {
for _, s := range servers {
if s.Region == "RU" {
continue
}
if err := HealthCheck(s, timeout); err == nil {
return &s
}
}
return nil
}
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