package catalogue

import (
	"testing"
)

// A store as a module now declares it (novox/hq ADR 0233): its own data by directory with a class and a
// dump, and what it keeps for its consumers.
const declaredStore = `{"module":"pg","version":"1",
	"provides":[{"name":"postgres-database","scope":"mesh"}],
	"grants":{"postgres-database":"${dir:grants}"},
	"data":{
		"own":[
			{"id":"store","path":"${dir:store}","class":"irreplaceable","backup":{"dump":"dump-all > ${dir:dumps}/all","into":"dumps"},"active":"1d"},
			{"id":"dumps","path":"${dir:dumps}","class":"rebuildable","backup":"none"}],
		"consumers":{"postgres-database":{"class":"irreplaceable","in":"store"}}},
	"resources":[
		{"id":"grants","type":"directory","mode":"0700"},
		{"id":"store","type":"directory","path":"/srv/store","mode":"0700"},
		{"id":"dumps","type":"directory","path":"${dir:store}/dumps","mode":"0700"},
		{"id":"server","type":"container","image":"x@sha256:aa","volumes":["${dir:store}:/var/lib/postgresql/data"]}]}`

func mustParse(t *testing.T, raw string) Manifest {
	t.Helper()
	m, err := decodeForTest([]byte(raw))
	if err != nil {
		t.Fatalf("refused: %v", err)
	}
	return m
}

// What a binding is sticky by follows the class (ADR 0232, generalised by 0233): a cache's consumers
// move freely, a store's do not; an older definition saying nothing still follows its grant.
func TestKeepingConsumerDataFollowsTheClass(t *testing.T) {
	for class, keeps := range map[string]bool{"irreplaceable": true, "valuable": true, "rebuildable": true, "cache": false, "none": false} {
		in := `,"in":"d"`
		own := `"own":[{"id":"d","path":"${dir:d}","class":"irreplaceable"}],`
		if !keeps {
			in, own = "", ""
		}
		m := mustParse(t, `{"module":"p","version":"1","provides":[{"name":"q","scope":"mesh"}],"grants":{"q":"${dir:d}"},
			"resources":[{"id":"d","type":"directory","mode":"0700"}],
			"data":{`+own+`"consumers":{"q":{"class":"`+class+`"`+in+`}}}}`)
		if m.KeepsConsumerData("q") != keeps {
			t.Errorf("class %s keeps consumer data: %v, want %v", class, !keeps, keeps)
		}
		shelf := map[string]Manifest{"p": m}
		if KeepsConsumerData(shelf, "q") != keeps {
			t.Errorf("class %s: the provision by name keeps: %v", class, !keeps)
		}
	}
	older := mustParse(t, `{"module":"p","version":"1","provides":[{"name":"q","scope":"mesh"}],"grants":{"q":"${dir:d}"},
		"resources":[{"id":"d","type":"directory","mode":"0700"}]}`)
	if !older.KeepsConsumerData("q") {
		t.Fatal("an older definition that grants no longer keeps its consumers' data")
	}
}