package bus_test

import (
	"encoding/json"
	"strings"
	"testing"
	"time"

	"github.com/nats-io/nats.go"

	"github.com/novox/mesh-tools/node-tools/internal/bus"
	"github.com/novox/mesh-tools/node-tools/internal/meshtest"
)

// novox/hq issue 314: a module's answer larger than the bus carries in one message is said to be too large,
// at once, not a 30-second silence. (The controller's paging ended with the controller, issue 1126.)
func TestAnAnswerLargerThanOneMessage(t *testing.T) {
	url := meshtest.URL(t)
	seat, err := nats.Connect(url)
	if err != nil {
		t.Fatal(err)
	}
	defer seat.Close()
	c, err := bus.Connect(bus.Credential{URL: url, Module: "console", Node: "anchor"})
	if err != nil {
		t.Fatal(err)
	}
	defer c.Close()
	large := strings.Repeat("a condition held past its bound; ", 3*int(seat.MaxPayload())/32)

	stop, err := c.HandleSubject("mesh.mod.journal.tool.lines", func(json.RawMessage) (any, error) { return large, nil })
	if err != nil {
		t.Fatal(err)
	}
	defer stop()
	asked := time.Now()
	_, err = c.Ask("journal.lines", map[string]any{}, "mesh.mod.journal.tool.lines")
	if err == nil || !strings.Contains(err.Error(), "more than the bus carries") {
		t.Fatalf("a module's answer too large for one message read as %v", err)
	}
	if took := time.Since(asked); took > 5*time.Second {
		t.Fatalf("it took %s to say", took)
	}
}