package inventory

import (
	"testing"

	"github.com/novox/mesh-controller/internal/catalogue"
)

// Where a consumer of data was bound is kept, and a move keeps where it was (novox/hq ADR 0232).
func TestABindingIsRecordedAndAMoveKeepsWhereItWas(t *testing.T) {
	inv := fresh(t)
	ctx := t.Context()
	for _, n := range []string{"home", "anchor"} {
		if _, err := inv.AddNode(ctx, n); err != nil {
			t.Fatal(err)
		}
	}
	home := catalogue.Chosen{Node: "home", Module: "store"}
	anchor := catalogue.Chosen{Node: "anchor", Module: "store"}
	if err := inv.RecordBindings(ctx, "home", []Binding{
		{Consumer: "board", Provision: "postgres-database", Provider: home},
		{Consumer: "game", Provision: "postgres-database", Provider: home},
	}); err != nil {
		t.Fatal(err)
	}
	got, err := inv.BindingsFor(ctx, "home")
	if err != nil {
		t.Fatal(err)
	}
	if got["board"]["postgres-database"] != home || got["game"]["postgres-database"] != home {
		t.Fatalf("recorded %+v", got)
	}
	first, err := inv.Bindings(ctx)
	if err != nil || len(first) != 2 {
		t.Fatalf("%+v, %v", first, err)
	}

	// Sent again where it is: only marked sent.
	if err := inv.RecordBindings(ctx, "home", []Binding{{Consumer: "board", Provision: "postgres-database", Provider: home}}); err != nil {
		t.Fatal(err)
	}
	// Moved by a pin and sent: bound anew, with where it was.
	if err := inv.RecordBindings(ctx, "home", []Binding{{Consumer: "game", Provision: "postgres-database", Provider: anchor}}); err != nil {
		t.Fatal(err)
	}
	all, err := inv.Bindings(ctx)
	if err != nil {
		t.Fatal(err)
	}
	for _, b := range all {
		switch b.Consumer {
		case "board":
			if b.Provider != home || b.MovedFrom != "" || !b.BoundAt.Equal(first[0].BoundAt) || b.Machine != "home" {
				t.Errorf("a binding sent again where it is changed: %+v (was %+v)", b, first[0])
			}
		case "game":
			if b.Provider != anchor || b.MovedFrom != "home/store" || !b.BoundAt.After(first[1].BoundAt) {
				t.Errorf("a moved binding: %+v", b)
			}
		}
	}

	// A provider machine leaving keeps the record of where the data is.
	if _, err := inv.store.Pool().Exec(ctx, `delete from node where name = 'anchor'`); err != nil {
		t.Fatal(err)
	}
	got, err = inv.BindingsFor(ctx, "home")
	if err != nil {
		t.Fatal(err)
	}
	if got["game"]["postgres-database"] != anchor {
		t.Fatalf("the record went with the provider's machine: %+v", got)
	}
}