package app

import (
	"bytes"
	"context"
	"os"
	"path/filepath"
	"testing"
)

func TestManifestCreateJSONPreservesCreatedOffsetAndFileMetadata(t *testing.T) {
	root := t.TempDir()
	if err := os.WriteFile(filepath.Join(root, "report.md"), []byte("# Report\n"), 0o600); err != nil {
		t.Fatalf("write report: %v", err)
	}
	var stdout bytes.Buffer

	err := ManifestCreate(context.Background(), ManifestCreateOptions{
		Root:         root,
		ID:           "reports.offset",
		Created:      "2026-06-01T06:30:00-05:00",
		Files:        []string{"report.md"},
		Stdout:       &stdout,
		OutputFormat: OutputFormatJSON,
	})

	if err != nil {
		t.Fatalf("ManifestCreate() error = %v", err)
	}
	result := decodeAppResult(t, stdout.String())
	if result["id"] != "reports.offset" || result["created"] != "2026-06-01T06:30:00-05:00" || result["file_count"] != float64(1) {
		t.Fatalf("result = %#v, want manifest metadata", result)
	}
	files, ok := result["files"].([]any)
	if !ok || len(files) != 1 {
		t.Fatalf("files = %#v, want one file", result["files"])
	}
	file, ok := files[0].(map[string]any)
	if !ok || file["path"] != "report.md" || file["sha256"] == "" || file["size"] != float64(9) {
		t.Fatalf("file = %#v, want projected file metadata", file)
	}
}