package declaration

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

// A container may be given supplementary groups (novox/hq ADR 0480 clause 7, issue 1636): numbers, each above zero.

// 1636/AC1: a declaration with groups decodes, is written back with them, and a declaration without them has none.
func TestAContainerWithGroupsDecodesAndIsWrittenBack(t *testing.T) {
	d, err := Parse([]byte(`{"declaration":1,"resources":[
	  {"id":"n8n.server","type":"container","name":"n8n","image":"` + anImage + `","groups":[2000,2001]},
	  {"id":"n8n.plain","type":"container","name":"plain","image":"` + anImage + `"}]}`))
	if err != nil {
		t.Fatal(err)
	}
	c := d.Resources[0].(*Container)
	if len(c.Groups) != 2 || c.Groups[0] != 2000 || c.Groups[1] != 2001 {
		t.Fatalf("groups read as %v", c.Groups)
	}
	raw, err := json.Marshal(c)
	if err != nil || !strings.Contains(string(raw), `"groups":[2000,2001]`) {
		t.Fatalf("written as %s (%v)", raw, err)
	}
	plain, _ := json.Marshal(d.Resources[1].(*Container))
	if strings.Contains(string(plain), "groups") {
		t.Fatalf("a container without groups is written with the key: %s", plain)
	}
	if g := d.Resources[1].(*Container).Groups; g != nil {
		t.Fatalf("a container without groups reads %v", g)
	}
}

// 1636/AC2: zero, a number below it, one the kernel keeps for "no group" and a number twice are refused, naming why.
func TestAContainersGroupsAreWholeNumbersAboveZeroAndNotRepeated(t *testing.T) {
	for want, groups := range map[string]string{
		"never root": `[0]`,
		"below zero": `[-5]`,
		"no group":   `[4294967295]`,
		"twice":      `[2000,2000]`,
	} {
		_, err := Parse([]byte(`{"declaration":1,"resources":[{"id":"m.c","type":"container","name":"c","image":"` +
			anImage + `","groups":` + groups + `}]}`))
		if err == nil || !strings.Contains(err.Error(), want) {
			t.Errorf("groups %s: want a refusal saying %q, got %v", groups, want, err)
		}
	}
	// Text where a number stands is refused by the decoder itself.
	if _, err := Parse([]byte(`{"declaration":1,"resources":[{"id":"m.c","type":"container","name":"c","image":"` +
		anImage + `","groups":["media"]}]}`)); err == nil {
		t.Error("a group named by text was accepted")
	}
}