package catalogue

import (
	"encoding/json"
	"testing"
)

// A module declares the logs it keeps (novox/hq ADR 0297 §1): a log by its bare name, or with its cap
// in MiB; the default cap where none is said.
func TestAManifestMaySayWhatLogsItKeeps(t *testing.T) {
	m, err := decodeForTest([]byte(`{"module":"mesh-issues","version":"1",` +
		`"logs":["changes",{"name":"moves","max-mib":2048}]}`))
	if err != nil {
		t.Fatal(err)
	}
	if len(m.Logs) != 2 || m.Logs[0].Name != "changes" || m.Logs[1].Name != "moves" {
		t.Fatalf("logs not read: %+v", m.Logs)
	}
	if m.Logs[0].Cap() != LogDefaultMiB || m.Logs[0].Cap() != 1024 || m.Logs[1].Cap() != 2048 {
		t.Fatalf("caps read as %d and %d", m.Logs[0].Cap(), m.Logs[1].Cap())
	}
	out, _ := json.Marshal(m.Logs)
	if string(out) != `["changes",{"name":"moves","max-mib":2048}]` {
		t.Fatalf("written back as %s", out)
	}
	// 1953 S-age (ADR 0565 §10): a log may keep its entries for an age, written back with it.
	aged, err := decodeForTest([]byte(`{"module":"mesh-hand-acts","version":"1","logs":[{"name":"acts","max-age-days":400}]}`))
	if err != nil || aged.Logs[0].MaxAgeDays != 400 {
		t.Fatalf("an aged log read as %+v, %v", aged.Logs, err)
	}
	if out, _ := json.Marshal(aged.Logs); string(out) != `[{"name":"acts","max-age-days":400}]` {
		t.Fatalf("an aged log written back as %s", out)
	}
	for _, edge := range []string{`{"name":"a","max-mib":1}`, `{"name":"a","max-mib":8192}`, `{"name":"a","max-age-days":3650}`} {
		if _, err := decodeForTest([]byte(`{"module":"a","version":"1","logs":[` + edge + `]}`)); err != nil {
			t.Errorf("%s is inside the caps and was refused: %v", edge, err)
		}
	}
}