package postgres

import (
	"context"
	"fmt"
	"knowledge-governance/internal/governance"
	"testing"
	"time"
)

func TestContractSourceCandidateBeyondHistoryWindow(t *testing.T) {
	store, _ := newIdentityStore(t)
	ctx := context.Background()
	now := time.Now().UTC()
	source := governance.LibrarySourceIdentity{Project: "source-project", App: "source-app", Scope: "internal", TenantID: 10000, KnowledgeBaseID: "kb-source"}
	id, err := source.ID()
	if err != nil {
		t.Fatal(err)
	}
	for i := 0; i < 65; i++ {
		sid := "other-source"
		if i == 0 {
			sid = id
		}
		snapshot := fmt.Sprintf("candidate-%d", i)
		if err := store.RecordLibraryVersion(ctx, governance.LibraryVersion{ID: governance.LibraryVersionID(governance.LibraryVersionTestSealed, "internal", snapshot), Scope: "internal", Kind: governance.LibraryVersionTestSealed, SnapshotID: snapshot, Evidence: map[string]any{"source_id": sid}, CreatedAt: now.Add(time.Duration(i) * time.Second)}); err != nil {
			t.Fatal(err)
		}
	}
	candidate, found, err := store.LibrarySourceCandidate(ctx, "internal", id)
	if err != nil || !found || candidate.SnapshotID != "candidate-0" {
		t.Fatalf("exact candidate missing: %+v %v %v", candidate, found, err)
	}
	source.KnowledgeBaseID = "new-kb"
	newID, _ := source.ID()
	if _, found, err = store.LibrarySourceCandidate(ctx, "internal", newID); err != nil || found {
		t.Fatalf("new source inherited old candidate: %v %v", found, err)
	}
	if _, found, err = store.LibrarySourceCandidate(ctx, "external", id); err != nil || found {
		t.Fatalf("cross scope candidate: %v %v", found, err)
	}
}