package consul

import (
	"context"
	"time"

	consul "github.com/hashicorp/consul/api"
	"github.com/micro/go-micro/registry"
)

// Connect specifies services should be registered as Consul Connect services
func Connect() registry.Option {
	return func(o *registry.Options) {
		if o.Context == nil {
			o.Context = context.Background()
		}
		o.Context = context.WithValue(o.Context, "consul_connect", true)
	}
}

func Config(c *consul.Config) registry.Option {
	return func(o *registry.Options) {
		if o.Context == nil {
			o.Context = context.Background()
		}
		o.Context = context.WithValue(o.Context, "consul_config", c)
	}
}

// AllowStale sets whether any Consul server (non-leader) can service
// a read. This allows for lower latency and higher throughput
// at the cost of potentially stale data.
// Works similar to Consul DNS Config option [1].
// Defaults to true.
//
// [1] https://www.consul.io/docs/agent/options.html#allow_stale
//
func AllowStale(v bool) registry.Option {
	return func(o *registry.Options) {
		if o.Context == nil {
			o.Context = context.Background()
		}
		o.Context = context.WithValue(o.Context, "consul_allow_stale", v)
	}
}

// QueryOptions specifies the QueryOptions to be used when calling
// Consul. See `Consul API` for more information [1].
//
// [1] https://godoc.org/github.com/hashicorp/consul/api#QueryOptions
//
func QueryOptions(q *consul.QueryOptions) registry.Option {
	return func(o *registry.Options) {
		if q == nil {
			return
		}
		if o.Context == nil {
			o.Context = context.Background()
		}
		o.Context = context.WithValue(o.Context, "consul_query_options", q)
	}
}

//
// TCPCheck will tell the service provider to check the service address
// and port every `t` interval. It will enabled only if `t` is greater than 0.
// See `TCP + Interval` for more information [1].
//
// [1] https://www.consul.io/docs/agent/checks.html
//
func TCPCheck(t time.Duration) registry.Option {
	return func(o *registry.Options) {
		if t <= time.Duration(0) {
			return
		}
		if o.Context == nil {
			o.Context = context.Background()
		}
		o.Context = context.WithValue(o.Context, "consul_tcp_check", t)
	}
}