package enginereads

import (
	"strings"
	"testing"
)

// The answer and the event are judged as the contract lays them out and its reader checks: the layout's version, a node
// that is a name, no empty capability, a time, and an event's why one of the two.
func TestTheAnswerAndTheEventAreJudged(t *testing.T) {
	const at = "2026-11-05T12:00:00Z"
	for name, c := range map[string]struct{ body, bad string }{
		"whole":      {`{"v":1,"node":"ace","manifest-reads":["mesh-config.resolved"],"stated-at":"` + at + `"}`, ""},
		"old layout": {`{"v":2,"node":"ace","stated-at":"` + at + `"}`, "version"},
		"bad node":   {`{"v":1,"node":"a.b","stated-at":"` + at + `"}`, "no node"},
		"empty read": {`{"v":1,"node":"ace","manifest-reads":[" "],"stated-at":"` + at + `"}`, "empty reader"},
		"no time":    {`{"v":1,"node":"ace","stated-at":"yesterday"}`, "RFC 3339"},
	} {
		_, _, err := DecodeAnswer([]byte(c.body))
		if (c.bad == "") != (err == nil) || (err != nil && !strings.Contains(err.Error(), c.bad)) {
			t.Errorf("answer %s: %v, want %q", name, err, c.bad)
		}
	}
	for name, c := range map[string]struct{ body, bad string }{
		"whole":       {`{"v":1,"node":"ace","why":"started","manifest-reads":["a.b"],"at":"` + at + `"}`, ""},
		"returned":    {`{"v":1,"node":"ace","why":"returned","at":"` + at + `"}`, ""},
		"old layout":  {`{"v":2,"node":"ace","why":"started","at":"` + at + `"}`, "version"},
		"no node":     {`{"v":1,"node":"","why":"started","at":"` + at + `"}`, "no node"},
		"another why": {`{"v":1,"node":"ace","why":"bored","at":"` + at + `"}`, "bored"},
		"no time":     {`{"v":1,"node":"ace","why":"started","at":"yesterday"}`, "RFC 3339"},
	} {
		_, err := DecodeChanged([]byte(c.body))
		if (c.bad == "") != (err == nil) || (err != nil && !strings.Contains(err.Error(), c.bad)) {
			t.Errorf("event %s: %v, want %q", name, err, c.bad)
		}
	}
	if Verb != "manifest-reads" || Event != "manifest-reads-changed" || Consumes != "node-engine.manifest-reads-changed" || Invoke != "seat:node-engine.manifest-reads" {
		t.Errorf("the names are %s %s %s %s", Verb, Event, Consumes, Invoke)
	}
}