// Copyright 2023 Princess B33f Heavy Industries / Dave Shanley
// SPDX-License-Identifier: MIT

package index

import (
	"github.com/stretchr/testify/assert"
	"gopkg.in/yaml.v3"
	"io"
	"io/fs"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"net/url"
	"os"
	"path/filepath"
	"runtime"
	"strings"
	"testing"
	"testing/fstest"
	"time"
)

func TestRolodex_NewRolodex(t *testing.T) {
	c := CreateOpenAPIIndexConfig()
	rolo := NewRolodex(c)
	assert.NotNil(t, rolo)
	assert.NotNil(t, rolo.indexConfig)
	assert.Nil(t, rolo.GetIgnoredCircularReferences())
	assert.Equal(t, rolo.GetIndexingDuration(), time.Duration(0))
	assert.Nil(t, rolo.GetRootIndex())
	assert.Len(t, rolo.GetIndexes(), 0)
	assert.Len(t, rolo.GetCaughtErrors(), 0)
}

func TestRolodex_NoFS(t *testing.T) {

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rf, err := rolo.Open("spec.yaml")
	assert.Error(t, err)
	assert.Equal(t, "rolodex has no file systems configured, cannot open 'spec.yaml'. "+
		"Add a BaseURL or BasePath to your configuration so the rolodex knows how to resolve references", err.Error())
	assert.Nil(t, rf)

}

func TestRolodex_NoFSButHasRemoteFS(t *testing.T) {

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddRemoteFS("http://localhost", nil)
	rf, err := rolo.Open("spec.yaml")
	assert.Error(t, err)
	assert.Equal(t, "the rolodex has no local file systems configured, cannot open local file 'spec.yaml'", err.Error())
	assert.Nil(t, rf)

}

func TestRolodex_LocalNativeFS(t *testing.T) {

	t.Parallel()
	testFS := fstest.MapFS{
		"spec.yaml":             {Data: []byte("hip"), ModTime: time.Now()},
		"subfolder/spec1.json":  {Data: []byte("hop"), ModTime: time.Now()},
		"subfolder2/spec2.yaml": {Data: []byte("chop"), ModTime: time.Now()},
		"subfolder2/hello.jpg":  {Data: []byte("shop"), ModTime: time.Now()},
	}

	baseDir := "/tmp"

	fileFS, err := NewLocalFSWithConfig(&LocalFSConfig{
		BaseDirectory: baseDir,
		Logger: slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
			Level: slog.LevelDebug,
		})),
		DirFS: testFS,
	})
	if err != nil {
		t.Fatal(err)
	}

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddLocalFS(baseDir, fileFS)

	f, rerr := rolo.Open("spec.yaml")
	assert.NoError(t, rerr)
	assert.Equal(t, "hip", f.GetContent())

}

func TestRolodex_LocalNonNativeFS(t *testing.T) {

	t.Parallel()
	testFS := fstest.MapFS{
		"spec.yaml":             {Data: []byte("hip"), ModTime: time.Now()},
		"subfolder/spec1.json":  {Data: []byte("hop"), ModTime: time.Now()},
		"subfolder2/spec2.yaml": {Data: []byte("chop"), ModTime: time.Now()},
		"subfolder2/hello.jpg":  {Data: []byte("shop"), ModTime: time.Now()},
	}

	baseDir := ""

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddLocalFS(baseDir, testFS)

	f, rerr := rolo.Open("spec.yaml")
	assert.NoError(t, rerr)

	assert.Equal(t, "hip", f.GetContent())
}

type test_badfs struct {
	ok       bool
	goodstat bool
	offset   int64
}

func (t *test_badfs) Open(v string) (fs.File, error) {
	ok := false
	if v != "/" && v != "." && v != "http://localhost/test.yaml" {
		ok = true
	}
	if v == "http://localhost/goodstat.yaml" || strings.HasSuffix(v, "goodstat.yaml") {
		ok = true
		t.goodstat = true
	}
	if v == "http://localhost/badstat.yaml" || v == "badstat.yaml" {
		ok = true
		t.goodstat = false
	}
	return &test_badfs{ok: ok, goodstat: t.goodstat}, nil
}
func (t *test_badfs) Stat() (fs.FileInfo, error) {
	if t.goodstat {
		return &LocalFile{
			lastModified: time.Now(),
		}, nil
	}
	return nil, os.ErrInvalid
}
func (t *test_badfs) Read(b []byte) (int, error) {
	if t.ok {
		if t.offset >= int64(len("pizza")) {
			return 0, io.EOF
		}
		if t.offset < 0 {
			return 0, &fs.PathError{Op: "read", Path: "lemons", Err: fs.ErrInvalid}
		}
		n := copy(b, "pizza"[t.offset:])
		t.offset += int64(n)
		return n, nil
	}
	return 0, os.ErrNotExist
}
func (t *test_badfs) Close() error {
	return os.ErrNotExist
}

func TestRolodex_LocalNonNativeFS_BadRead(t *testing.T) {

	t.Parallel()
	testFS := &test_badfs{}

	baseDir := ""

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddLocalFS(baseDir, testFS)

	f, rerr := rolo.Open("/")
	assert.Nil(t, f)
	assert.Error(t, rerr)
	if runtime.GOOS != "windows" {
		assert.Equal(t, "file does not exist", rerr.Error())
	} else {
		assert.Equal(t, "invalid argument", rerr.Error())
	}
}

func TestRolodex_LocalNonNativeFS_BadStat(t *testing.T) {

	t.Parallel()
	testFS := &test_badfs{}

	baseDir := ""

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddLocalFS(baseDir, testFS)

	f, rerr := rolo.Open("badstat.yaml")
	assert.Nil(t, f)
	assert.Error(t, rerr)
	assert.Equal(t, "invalid argument", rerr.Error())

}

func TestRolodex_LocalNonNativeRemoteFS_BadRead(t *testing.T) {

	t.Parallel()
	testFS := &test_badfs{}

	baseDir := ""

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddRemoteFS(baseDir, testFS)

	f, rerr := rolo.Open("http://localhost/test.yaml")
	assert.Nil(t, f)
	assert.Error(t, rerr)
	assert.Equal(t, "file does not exist", rerr.Error())
}

func TestRolodex_LocalNonNativeRemoteFS_ReadFile(t *testing.T) {

	t.Parallel()
	testFS := &test_badfs{}

	baseDir := ""

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddRemoteFS(baseDir, testFS)

	r, rerr := rolo.Open("http://localhost/goodstat.yaml")
	assert.NotNil(t, r)
	assert.NoError(t, rerr)

	assert.Equal(t, "goodstat.yaml", r.Name())
	assert.Nil(t, r.GetIndex())
	assert.Equal(t, "pizza", r.GetContent())
	assert.Equal(t, "http://localhost/goodstat.yaml", r.GetFullPath())
	assert.Greater(t, r.ModTime().UnixMilli(), int64(1))
	assert.Equal(t, int64(5), r.Size())
	assert.False(t, r.IsDir())
	assert.Nil(t, r.Sys())
	assert.Equal(t, r.Mode(), os.FileMode(0))
	n, e := r.GetContentAsYAMLNode()
	assert.Len(t, r.GetErrors(), 0)
	assert.NoError(t, e)
	assert.NotNil(t, n)
	assert.Equal(t, YAML, r.GetFileExtension())
}

func TestRolodex_LocalNonNativeRemoteFS_BadStat(t *testing.T) {

	t.Parallel()
	testFS := &test_badfs{}

	baseDir := ""

	rolo := NewRolodex(CreateOpenAPIIndexConfig())
	rolo.AddRemoteFS(baseDir, testFS)

	f, rerr := rolo.Open("http://localhost/badstat.yaml")
	assert.Nil(t, f)
	assert.Error(t, rerr)
	assert.Equal(t, "invalid argument", rerr.Error())

}

func TestRolodex_rolodexFileTests(t *testing.T) {
	r := &rolodexFile{}
	assert.Equal(t, "", r.Name())
	assert.Nil(t, r.GetIndex())
	assert.Equal(t, "", r.GetContent())
	assert.Equal(t, "", r.GetFullPath())
	assert.Equal(t, time.Now().UnixMilli(), r.ModTime().UnixMilli())
	assert.Equal(t, int64(0), r.Size())
	assert.False(t, r.IsDir())
	assert.Nil(t, r.Sys())
	assert.Equal(t, r.Mode(), os.FileMode(0))
	n, e := r.GetContentAsYAMLNode()
	assert.Len(t, r.GetErrors(), 0)
	assert.NoError(t, e)
	assert.Nil(t, n)
	assert.Equal(t, UNSUPPORTED, r.GetFileExtension())
}

func TestRolodex_NotRolodexFS(t *testing.T) {

	nonRoloFS := os.DirFS(".")
	cf := CreateOpenAPIIndexConfig()
	rolo := NewRolodex(cf)
	rolo.AddLocalFS(".", nonRoloFS)

	err := rolo.IndexTheRolodex()

	assert.Error(t, err)
	assert.Equal(t, "rolodex file system is not a RolodexFS", err.Error())

}

func TestRolodex_IndexCircularLookup(t *testing.T) {

	offToOz := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      $ref: "../test_specs/circular-tests.yaml#/components/schemas/One"`

	_ = os.WriteFile("off_to_oz.yaml", []byte(offToOz), 0644)
	defer os.Remove("off_to_oz.yaml")

	baseDir := "../"

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		DirFS:         os.DirFS(baseDir),
		FileFilters: []string{
			"off_to_oz.yaml",
			"test_specs/circular-tests.yaml",
		},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	cf := CreateOpenAPIIndexConfig()
	cf.BasePath = baseDir
	rolodex := NewRolodex(cf)
	rolodex.AddLocalFS(baseDir, fileFS)
	err = rolodex.IndexTheRolodex()
	assert.Error(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 3)
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 0)
}

func TestRolodex_IndexCircularLookup_AroundWeGo(t *testing.T) {

	there := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: object
      required:
        - where
      properties:
        where:
          $ref: "back-again.yaml#/components/schemas/CircleTest/properties/muffins"`

	backagain := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         $ref: "there.yaml#/components/schemas/CircleTest"`

	_ = os.WriteFile("there.yaml", []byte(there), 0644)
	_ = os.WriteFile("back-again.yaml", []byte(backagain), 0644)
	defer os.Remove("there.yaml")
	defer os.Remove("back-again.yaml")

	baseDir := "."

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		DirFS:         os.DirFS(baseDir),
		FileFilters: []string{
			"there.yaml",
			"back-again.yaml",
		},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	cf := CreateOpenAPIIndexConfig()
	cf.BasePath = baseDir
	rolodex := NewRolodex(cf)
	rolodex.AddLocalFS(baseDir, fileFS)
	err = rolodex.IndexTheRolodex()
	assert.Error(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 1)
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 0)
}

func TestRolodex_IndexCircularLookup_AroundWeGo_IgnorePoly(t *testing.T) {

	fifth := "type: string"

	fourth := `type: "object"
properties:
  name:
    type: "string"
  children:
    type: "object"`

	third := `type: "object"
properties:
  blame:
    $ref: "$_5"

  fame: 
     $ref: "$_4#/properties/name"
  game:
    $ref: "$_5"

  children:
    type: "object"
    anyOf:
      - $ref: "$2#/components/schemas/CircleTest"
required:
  - children`

	second := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          anyOf:
            - $ref: "$3"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"
`

	first := `openapi: 3.1.0
components:
  schemas:
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         $ref: "$2#/components/schemas/CircleTest"
`

	var firstFile, secondFile, thirdFile, fourthFile, fifthFile *os.File
	var fErr error

	tmp := "tmp-a"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "*-first.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "*-second.yaml")
	assert.NoError(t, fErr)

	thirdFile, fErr = os.CreateTemp(tmp, "*-third.yaml")
	assert.NoError(t, fErr)

	fourthFile, fErr = os.CreateTemp(tmp, "*-fourth.yaml")
	assert.NoError(t, fErr)

	fifthFile, fErr = os.CreateTemp(tmp, "*-fifth.yaml")
	assert.NoError(t, fErr)

	defer os.RemoveAll(tmp)

	first = strings.ReplaceAll(strings.ReplaceAll(first, "$2", secondFile.Name()), "\\", "\\\\")
	second = strings.ReplaceAll(strings.ReplaceAll(second, "$3", thirdFile.Name()), "\\", "\\\\")
	third = strings.ReplaceAll(third, "$4", filepath.Base(fourthFile.Name()))
	third = strings.ReplaceAll(third, "$_4", fourthFile.Name())
	third = strings.ReplaceAll(third, "$5", filepath.Base(fifthFile.Name()))
	third = strings.ReplaceAll(third, "$_5", fifthFile.Name())
	third = strings.ReplaceAll(strings.ReplaceAll(third, "$2", secondFile.Name()), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)
	thirdFile.WriteString(third)
	fourthFile.WriteString(fourth)
	fifthFile.WriteString(fifth)

	defer os.RemoveAll(tmp)

	baseDir := "tmp-a"

	cf := CreateOpenAPIIndexConfig()
	cf.BasePath = baseDir
	cf.IgnorePolymorphicCircularReferences = true
	cf.SkipDocumentCheck = true

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		IndexConfig:   cf,
		//DirFS:         os.DirFS(baseDir),
		//FileFilters: []string{
		//	filepath.Base(firstFile.Name()),
		//	filepath.Base(secondFile.Name()),
		//	filepath.Base(thirdFile.Name()),
		//	filepath.Base(fourthFile.Name()),
		//	filepath.Base(fifthFile.Name()),
		//},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	// add logger to config
	cf.Logger = slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
		Level: slog.LevelError,
	}))

	rolodex := NewRolodex(cf)
	rolodex.AddLocalFS(baseDir, fileFS)

	//srv := test_rolodexDeepRefServer([]byte(first), []byte(second),
	//	[]byte(third), []byte(fourth), []byte(fifth))
	//defer srv.Close()

	//u, _ := url.Parse(srv.URL)
	//cf.BaseURL = u
	//remoteFS, rErr := NewRemoteFSWithConfig(cf)
	//assert.NoError(t, rErr)

	//rolodex.AddRemoteFS(srv.URL, remoteFS)

	var rootNode yaml.Node
	err = yaml.Unmarshal([]byte(first), &rootNode)
	assert.NoError(t, err)
	rolodex.SetRootNode(&rootNode)

	err = rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)

	// there are two circles. Once when reading the journey from first.yaml, and then a second internal look in second.yaml
	// the index won't find three, because by the time that 'three' has been read, it's already been indexed and the journey
	// discovered.
	assert.GreaterOrEqual(t, len(rolodex.GetIgnoredCircularReferences()), 1)

	// extract a local file
	n, _ := filepath.Abs(firstFile.Name())
	f, _ := rolodex.Open(n)
	// index
	x, y := f.(*rolodexFile).Index(cf)
	assert.NotNil(t, x)
	assert.NoError(t, y)

	// re-index
	x, y = f.(*rolodexFile).Index(cf)
	assert.NotNil(t, x)
	assert.NoError(t, y)

	//// extract a remote  file
	//f, _ = rolodex.Open("http://the-space-race-is-all-about-space-and-time-dot.com/" + filepath.Base(fourthFile.Name()))
	//
	//// index
	//x, y = f.(*rolodexFile).Index(cf)
	//assert.NotNil(t, x)
	//assert.NoError(t, y)
	//
	//// re-index
	//x, y = f.(*rolodexFile).Index(cf)
	//assert.NotNil(t, x)
	//assert.NoError(t, y)
	//
	//// extract another remote  file
	//f, _ = rolodex.Open("http://the-space-race-is-all-about-space-and-time-dot.com/" + filepath.Base(fifthFile.Name()))
	//
	////change cf to perform document check (which should fail)
	//cf.SkipDocumentCheck = false
	//
	//// index and fail
	//x, y = f.(*rolodexFile).Index(cf)
	//assert.Nil(t, x)
	//assert.Error(t, y)
	//
	//// file that is not local, but is remote
	//f, _ = rolodex.Open("https://pb33f.io/bingo/jingo.yaml")
	//assert.NotNil(t, f)

}

func test_rolodexDeepRefServer(a, b, c, d, e []byte) *httptest.Server {
	return httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
		rw.Header().Set("Last-Modified", "Wed, 21 Oct 2015 12:28:00 GMT")
		if strings.HasSuffix(req.URL.String(), "-first.yaml") {
			_, _ = rw.Write(a)
			return
		}
		if strings.HasSuffix(req.URL.String(), "-second.yaml") {
			_, _ = rw.Write(b)
			return
		}
		if strings.HasSuffix(req.URL.String(), "-third.yaml") {
			_, _ = rw.Write(c)
			return
		}
		if strings.HasSuffix(req.URL.String(), "-fourth.yaml") {
			_, _ = rw.Write(d)
			return
		}
		if strings.HasSuffix(req.URL.String(), "-fifth.yaml") {
			_, _ = rw.Write(e)
			return
		}
		if strings.HasSuffix(req.URL.String(), "/bingo/jingo.yaml") {
			_, _ = rw.Write([]byte("openapi: 3.1.0"))
			return
		}
		rw.WriteHeader(http.StatusInternalServerError)
		rw.Write([]byte("500 - COMPUTAR SAYS NO!"))
	}))
}

func TestRolodex_IndexCircularLookup_PolyItems_LocalLoop_WithFiles_RecursiveLookup(t *testing.T) {

	fourth := `type: "object"
properties:
  name:
    type: "string"
  children:
    type: "object"`

	third := `type: "object"
properties:
  herbs:
    $ref: "$1"`

	second := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        bing:
          $ref: "not_found.yaml"
        name:
          type: "string"
        children:
          type: "object"
          anyOf:
            - $ref: "$3"
      required:
        - "name"
        - "children"`

	first := `openapi: 3.1.0
components:
  schemas:
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         $ref: "$2#/components/schemas/CircleTest"`

	var firstFile, secondFile, thirdFile, fourthFile *os.File
	var fErr error

	tmp := "tmp-b"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "*-first.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "*-second.yaml")
	assert.NoError(t, fErr)

	thirdFile, fErr = os.CreateTemp(tmp, "*-third.yaml")
	assert.NoError(t, fErr)

	fourthFile, fErr = os.CreateTemp(tmp, "*-fourth.yaml")
	assert.NoError(t, fErr)

	first = strings.ReplaceAll(strings.ReplaceAll(first, "$2", secondFile.Name()), "\\", "\\\\")
	second = strings.ReplaceAll(strings.ReplaceAll(second, "$3", thirdFile.Name()), "\\", "\\\\")
	third = strings.ReplaceAll(strings.ReplaceAll(third, "$4", filepath.Base(fourthFile.Name())), "\\", "\\\\")
	third = strings.ReplaceAll(strings.ReplaceAll(first, "$1", filepath.Base(thirdFile.Name())), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)
	thirdFile.WriteString(third)
	fourthFile.WriteString(fourth)

	defer os.RemoveAll(tmp)

	baseDir, _ := filepath.Abs(tmp)
	cf := CreateOpenAPIIndexConfig()
	cf.BasePath = baseDir
	cf.IgnorePolymorphicCircularReferences = true

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		IndexConfig:   cf,
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	rolodex := NewRolodex(cf)
	rolodex.AddLocalFS(baseDir, fileFS)

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(first), &rootNode)
	rolodex.SetRootNode(&rootNode)

	err = rolodex.IndexTheRolodex()
	assert.Error(t, err)
	assert.GreaterOrEqual(t, len(rolodex.GetCaughtErrors()), 1)
	assert.Equal(t, "cannot resolve reference `not_found.yaml`, it's missing:  [8:11]", rolodex.GetCaughtErrors()[0].Error())

}

func TestRolodex_IndexCircularLookup_PolyItems_LocalLoop_WithFiles(t *testing.T) {

	first := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          oneOf:
            items:
              $ref: "$2#/components/schemas/CircleTest"
      required:
        - "name"
        - "children"
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: object
         anyOf:
           - $ref: "#/components/schemas/CircleTest"`

	second := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          oneOf:
            items:
              $ref: "#/components/schemas/CircleTest"
      required:
        - "name"
        - "children"
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: object
         anyOf:
           - $ref: "#/components/schemas/CircleTest"`

	var firstFile, secondFile *os.File
	var fErr error

	tmp := "tmp-f"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "*-first.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "*-second.yaml")
	assert.NoError(t, fErr)

	first = strings.ReplaceAll(strings.ReplaceAll(first, "$2", secondFile.Name()), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)

	defer os.RemoveAll(tmp)

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(first), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnorePolymorphicCircularReferences = true
	rolodex := NewRolodex(cf)

	baseDir := tmp

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		DirFS:         os.DirFS(baseDir),
		FileFilters: []string{
			filepath.Base(firstFile.Name()),
			filepath.Base(secondFile.Name()),
		},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	rolodex.AddLocalFS(baseDir, fileFS)
	rolodex.SetRootNode(&rootNode)
	assert.NotNil(t, rolodex.GetRootNode())

	err = rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)

	// multiple loops across two files
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 1)
}

func TestRolodex_IndexCircularLookup_PolyItems_LocalLoop_BuildIndexesPost(t *testing.T) {

	first := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          oneOf:
            items:
              $ref: "$2#/components/schemas/CircleTest"
      required:
        - "name"
        - "children"
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: object
         anyOf:
           - $ref: "#/components/schemas/CircleTest"`

	second := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          oneOf:
            items:
              $ref: "#/components/schemas/CircleTest"
      required:
        - "name"
        - "children"
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: object
         anyOf:
           - $ref: "#/components/schemas/CircleTest"`

	var firstFile, secondFile *os.File
	var fErr error

	tmp := "tmp-c"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "*-first.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "*-second.yaml")
	assert.NoError(t, fErr)

	first = strings.ReplaceAll(strings.ReplaceAll(first, "$2", secondFile.Name()), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)

	defer os.RemoveAll(tmp)

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(first), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnorePolymorphicCircularReferences = true
	cf.AvoidBuildIndex = true
	rolodex := NewRolodex(cf)

	baseDir := tmp

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		DirFS:         os.DirFS(baseDir),
		FileFilters: []string{
			filepath.Base(firstFile.Name()),
			filepath.Base(secondFile.Name()),
		},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	rolodex.AddLocalFS(baseDir, fileFS)
	rolodex.SetRootNode(&rootNode)

	err = rolodex.IndexTheRolodex()
	rolodex.BuildIndexes()

	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)

	// multiple loops across two files
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 1)

	// trigger a rebuild, should do nothing.
	rolodex.BuildIndexes()
	assert.Len(t, rolodex.GetCaughtErrors(), 0)

}

func TestRolodex_IndexCircularLookup_ArrayItems_LocalLoop_WithFiles(t *testing.T) {

	first := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "array"
          items:
            $ref: "$2#/components/schemas/CircleTest"
      required:
        - "name"
        - "children"
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: array
         items:
           $ref: "#/components/schemas/CircleTest"`

	second := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: array
          items:
            $ref: "#/components/schemas/CircleTest"
      required:
        - "name"
        - "children"
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: array
         items:
           $ref: "#/components/schemas/CircleTest"`

	var firstFile, secondFile *os.File
	var fErr error

	tmp := "tmp-d"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "*-first.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "*-second.yaml")
	assert.NoError(t, fErr)

	first = strings.ReplaceAll(strings.ReplaceAll(first, "$2", secondFile.Name()), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)

	defer os.RemoveAll(tmp)

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(first), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnoreArrayCircularReferences = true
	rolodex := NewRolodex(cf)

	baseDir := tmp

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		DirFS:         os.DirFS(baseDir),
		FileFilters: []string{
			filepath.Base(firstFile.Name()),
			filepath.Base(secondFile.Name()),
		},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	rolodex.AddLocalFS(baseDir, fileFS)
	rolodex.SetRootNode(&rootNode)

	err = rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)

	// multiple loops across two files
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 1)
}

func TestRolodex_IndexCircularLookup_PolyItemsHttpOnly(t *testing.T) {

	third := `type: string`
	fourth := `components:
  schemas:
    Chicken:
      type: string`

	second := `openapi: 3.1.0
components:
  schemas:
    Loopy:
      type: "object"
      properties:
        cake:
          type: "string"
          anyOf:
            items:
              $ref: "https://I-love-a-good-cake-and-pizza.com/$3"
        pizza:
          type: "string"
          anyOf:
            items:
              $ref: "$3"
        same:
          type: "string"
          oneOf:
            items:
              $ref: "https://milly-the-milk-bottle.com/$4#/components/schemas/Chicken"
        name:
          type: "string"
          oneOf:
            items:
              $ref: "https://junk-peddlers-blues.com/$3#/"
        children:
          type: "object"
          allOf:
            items:
              $ref: "$1#/components/schemas/StartTest"
      required:
        - "name"
        - "children"
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          oneOf:
            items:
              $ref: "#/components/schemas/Loopy"
      required:
        - "name"
        - "children"`

	first := `openapi: 3.1.0
components:
  schemas:
    StartTest:
      type: object
      required:
        - muffins
      properties:
        chuffins:
          type: object
          allOf: 
            - $ref: "https://what-a-lovely-fence.com/$3"
        buffins:
          type: object
          allOf: 
            - $ref: "https://no-more-bananas-please.com/$2#/"
        muffins:
         type: object
         anyOf:
           - $ref: "https://where-are-all-my-jellies.com/$2#/components/schemas/CircleTest"
`

	var firstFile, secondFile, thirdFile, fourthFile *os.File
	var fErr error

	tmp := "tmp-e"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "*-first.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "*-second.yaml")
	assert.NoError(t, fErr)

	thirdFile, fErr = os.CreateTemp(tmp, "*-third.yaml")
	assert.NoError(t, fErr)

	fourthFile, fErr = os.CreateTemp(tmp, "*-fourth.yaml")
	assert.NoError(t, fErr)

	first = strings.ReplaceAll(first, "$2", filepath.Base(secondFile.Name()))
	first = strings.ReplaceAll(strings.ReplaceAll(first, "$3", filepath.Base(thirdFile.Name())), "\\", "\\\\")

	second = strings.ReplaceAll(second, "$3", filepath.Base(thirdFile.Name()))
	second = strings.ReplaceAll(second, "$1", filepath.Base(firstFile.Name()))
	second = strings.ReplaceAll(strings.ReplaceAll(second, "$4", filepath.Base(fourthFile.Name())), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)
	thirdFile.WriteString(third)
	fourthFile.WriteString(fourth)

	defer os.RemoveAll(tmp)

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(first), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnorePolymorphicCircularReferences = true
	rolodex := NewRolodex(cf)

	srv := test_rolodexDeepRefServer([]byte(first), []byte(second), []byte(third), []byte(fourth), nil)
	defer srv.Close()

	u, _ := url.Parse(srv.URL)
	cf.BaseURL = u
	remoteFS, rErr := NewRemoteFSWithConfig(cf)
	assert.NoError(t, rErr)

	rolodex.AddRemoteFS(srv.URL, remoteFS)
	rolodex.SetRootNode(&rootNode)

	err := rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)

	assert.GreaterOrEqual(t, len(rolodex.GetIgnoredCircularReferences()), 1)

}

func TestRolodex_IndexCircularLookup_PolyItemsFileOnly_LocalIncluded(t *testing.T) {

	third := `type: string`

	second := `openapi: 3.1.0
components:
  schemas:
    LoopyMcLoopFace:
      type: "object"
      properties:
        hoop:
          type: object
          allOf:
            items:
              $ref: "$3"
        boop:
          type: object
          allOf:
            items:
              $ref: "$3"
        loop:
          type: object
          oneOf:
            items:
              $ref: "#/components/schemas/LoopyMcLoopFace"
    CircleTest:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          anyOf:
            - $ref: "#/components/schemas/LoopyMcLoopFace"
      required:
        - "name"
        - "children"`

	first := `openapi: 3.1.0
components:
  schemas:
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: object
         anyOf:
           - $ref: "$2#/components/schemas/CircleTest"
           - $ref: "$3"`

	var firstFile, secondFile, thirdFile *os.File
	var fErr error

	tmp := "tmp-g"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "first-*.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "second-*.yaml")
	assert.NoError(t, fErr)

	thirdFile, fErr = os.CreateTemp(tmp, "third-*.yaml")
	assert.NoError(t, fErr)

	first = strings.ReplaceAll(first, "$2", secondFile.Name())
	first = strings.ReplaceAll(strings.ReplaceAll(first, "$3", thirdFile.Name()), "\\", "\\\\")
	second = strings.ReplaceAll(strings.ReplaceAll(second, "$3", thirdFile.Name()), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)
	thirdFile.WriteString(third)

	defer os.RemoveAll(tmp)

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(first), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnorePolymorphicCircularReferences = true
	cf.ExtractRefsSequentially = true
	rolodex := NewRolodex(cf)

	baseDir := tmp

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		DirFS:         os.DirFS(baseDir),
		FileFilters: []string{
			filepath.Base(firstFile.Name()),
			filepath.Base(secondFile.Name()),
			filepath.Base(thirdFile.Name()),
		},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	rolodex.AddLocalFS(baseDir, fileFS)
	rolodex.SetRootNode(&rootNode)

	err = rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)

	// should only be a single loop.
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 1)
}

func TestRolodex_TestDropDownToRemoteFS_CatchErrors(t *testing.T) {

	fourth := `type: "object"
properties:
  name:
    type: "string"
  children:
    type: "object"`

	third := `type: "object"
properties:
  name:
    $ref: "http://the-space-race-is-all-about-space-and-time-dot.com/$4"`

	second := `openapi: 3.1.0
components:
  schemas:
    CircleTest:
      type: "object"
      properties:
        bing:
          $ref: "not_found.yaml"
        name:
          type: "string"
        children:
          type: "object"
          anyOf:
            - $ref: "$3"
      required:
        - "name"
        - "children"`

	first := `openapi: 3.1.0
components:
  schemas:
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         $ref: "$2#/components/schemas/CircleTest"`

	var firstFile, secondFile, thirdFile, fourthFile *os.File
	var fErr error

	tmp := "tmp-h"
	_ = os.Mkdir(tmp, 0755)

	firstFile, fErr = os.CreateTemp(tmp, "*-first.yaml")
	assert.NoError(t, fErr)

	secondFile, fErr = os.CreateTemp(tmp, "*-second.yaml")
	assert.NoError(t, fErr)

	thirdFile, fErr = os.CreateTemp(tmp, "*-third.yaml")
	assert.NoError(t, fErr)

	fourthFile, fErr = os.CreateTemp(tmp, "*-fourth.yaml")
	assert.NoError(t, fErr)

	first = strings.ReplaceAll(strings.ReplaceAll(first, "$2", secondFile.Name()), "\\", "\\\\")
	second = strings.ReplaceAll(strings.ReplaceAll(second, "$3", thirdFile.Name()), "\\", "\\\\")
	third = strings.ReplaceAll(strings.ReplaceAll(third, "$4", filepath.Base(fourthFile.Name())), "\\", "\\\\")

	firstFile.WriteString(first)
	secondFile.WriteString(second)
	thirdFile.WriteString(third)
	fourthFile.WriteString(fourth)

	defer os.RemoveAll(tmp)

	baseDir := tmp

	fsCfg := &LocalFSConfig{
		BaseDirectory: baseDir,
		DirFS:         os.DirFS(baseDir),
		FileFilters: []string{
			filepath.Base(firstFile.Name()),
			filepath.Base(secondFile.Name()),
			filepath.Base(thirdFile.Name()),
			filepath.Base(fourthFile.Name()),
		},
	}

	fileFS, err := NewLocalFSWithConfig(fsCfg)
	if err != nil {
		t.Fatal(err)
	}

	cf := CreateOpenAPIIndexConfig()
	cf.BasePath = baseDir
	cf.IgnorePolymorphicCircularReferences = true
	rolodex := NewRolodex(cf)
	rolodex.AddLocalFS(baseDir, fileFS)

	srv := test_rolodexDeepRefServer([]byte(first), []byte(second),
		[]byte(third), []byte(fourth), nil)
	defer srv.Close()

	u, _ := url.Parse(srv.URL)
	cf.BaseURL = u
	remoteFS, rErr := NewRemoteFSWithConfig(cf)
	assert.NoError(t, rErr)

	rolodex.AddRemoteFS(srv.URL, remoteFS)

	err = rolodex.IndexTheRolodex()
	assert.Error(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 2)
	assert.Equal(t, "cannot resolve reference `not_found.yaml`, it's missing:  [8:11]", rolodex.GetCaughtErrors()[0].Error())
}

func TestRolodex_IndexCircularLookup_LookupHttpNoBaseURL(t *testing.T) {

	first := `openapi: 3.1.0
components:
  schemas:
    StartTest:
      type: object
      required:
        - muffins
      properties:
        muffins:
         type: object
         anyOf:
           - $ref: "https://raw.githubusercontent.com/pb33f/libopenapi/main/test_specs/circular-tests.yaml#/components/schemas/One"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(first), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnorePolymorphicCircularReferences = true
	rolodex := NewRolodex(cf)

	remoteFS, rErr := NewRemoteFSWithConfig(cf)
	assert.NoError(t, rErr)

	rolodex.AddRemoteFS("", remoteFS)
	rolodex.SetRootNode(&rootNode)

	err := rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)
}

func TestRolodex_IndexCircularLookup_ignorePoly(t *testing.T) {

	spinny := `openapi: 3.1.0
components:
  schemas:
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          anyOf:
            - $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(spinny), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnorePolymorphicCircularReferences = true
	rolodex := NewRolodex(cf)
	rolodex.SetRootNode(&rootNode)
	err := rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 1)
}

func TestRolodex_IndexCircularLookup_ignoreArray(t *testing.T) {

	spinny := `openapi: 3.1.0
components:
  schemas:
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "array"
          items:
            $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(spinny), &rootNode)

	cf := CreateOpenAPIIndexConfig()
	cf.IgnoreArrayCircularReferences = true
	rolodex := NewRolodex(cf)
	rolodex.SetRootNode(&rootNode)
	err := rolodex.IndexTheRolodex()
	assert.NoError(t, err)
	assert.Len(t, rolodex.GetCaughtErrors(), 0)
	assert.Len(t, rolodex.GetIgnoredCircularReferences(), 1)
}

func TestRolodex_SimpleTest_OneDoc(t *testing.T) {

	baseDir := "rolodex_test_data"

	fileFS, err := NewLocalFSWithConfig(&LocalFSConfig{
		BaseDirectory: baseDir,
		Logger: slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
			Level: slog.LevelDebug,
		})),
		DirFS: os.DirFS(baseDir),
	})

	if err != nil {
		t.Fatal(err)
	}

	cf := CreateOpenAPIIndexConfig()
	cf.BasePath = baseDir
	cf.IgnoreArrayCircularReferences = true
	cf.IgnorePolymorphicCircularReferences = true

	rolo := NewRolodex(cf)
	rolo.AddLocalFS(baseDir, fileFS)

	err = rolo.IndexTheRolodex()

	//assert.NotZero(t, rolo.GetIndexingDuration()) comes back as 0 on windows.
	assert.Nil(t, rolo.GetRootIndex())
	assert.Len(t, rolo.GetIndexes(), 10)

	assert.NoError(t, err)
	assert.Len(t, rolo.indexes, 10)

	// open components.yaml
	f, rerr := rolo.Open("components.yaml")
	assert.NoError(t, rerr)
	assert.Equal(t, "components.yaml", f.Name())

	idx, ierr := f.(*rolodexFile).Index(cf)
	assert.NoError(t, ierr)
	assert.NotNil(t, idx)
	assert.Equal(t, YAML, f.GetFileExtension())
	assert.True(t, strings.HasSuffix(f.GetFullPath(), "rolodex_test_data"+string(os.PathSeparator)+"components.yaml"))
	assert.NotNil(t, f.ModTime())
	if runtime.GOOS != "windows" {
		assert.Equal(t, int64(283), f.Size())
	} else {
		assert.Equal(t, int64(295), f.Size())

	}
	assert.False(t, f.IsDir())
	assert.Nil(t, f.Sys())
	assert.Equal(t, fs.FileMode(0), f.Mode())
	assert.Len(t, f.GetErrors(), 0)

	// check the index has a rolodex reference
	assert.NotNil(t, idx.GetRolodex())

	// re-run the index should be a no-op
	assert.NoError(t, rolo.IndexTheRolodex())
	rolo.CheckForCircularReferences()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 0)

}

func TestRolodex_CircularReferencesPolyIgnored(t *testing.T) {

	var d = `openapi: 3.1.0
components:
  schemas:
    bingo:
       type: object
       properties:
         bango:
           $ref: "#/components/schemas/ProductCategory"
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          items:
            anyOf:
              items:
                $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(d), &rootNode)

	c := CreateClosedAPIIndexConfig()
	c.IgnorePolymorphicCircularReferences = true
	rolo := NewRolodex(c)
	rolo.SetRootNode(&rootNode)
	_ = rolo.IndexTheRolodex()
	assert.NotNil(t, rolo.GetRootIndex())
	rolo.CheckForCircularReferences()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 1)
	assert.Len(t, rolo.GetCaughtErrors(), 0)

}

func TestRolodex_CircularReferencesPolyIgnored_PostCheck(t *testing.T) {

	var d = `openapi: 3.1.0
components:
  schemas:
    bingo:
       type: object
       properties:
         bango:
           $ref: "#/components/schemas/ProductCategory"
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          items:
            anyOf:
              items:
                $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(d), &rootNode)

	c := CreateClosedAPIIndexConfig()
	c.IgnorePolymorphicCircularReferences = true
	c.AvoidCircularReferenceCheck = true
	rolo := NewRolodex(c)
	rolo.SetRootNode(&rootNode)
	_ = rolo.IndexTheRolodex()
	assert.NotNil(t, rolo.GetRootIndex())
	rolo.CheckForCircularReferences()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 1)
	assert.Len(t, rolo.GetCaughtErrors(), 0)

}

func TestRolodex_CircularReferencesPolyIgnored_Resolve(t *testing.T) {

	var d = `openapi: 3.1.0
components:
  schemas:
    bingo:
       type: object
       properties:
         bango:
           $ref: "#/components/schemas/ProductCategory"
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "object"
          items:
            anyOf:
              items:
                $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(d), &rootNode)

	c := CreateClosedAPIIndexConfig()
	c.IgnorePolymorphicCircularReferences = true
	c.AvoidCircularReferenceCheck = true
	rolo := NewRolodex(c)
	rolo.SetRootNode(&rootNode)
	_ = rolo.IndexTheRolodex()
	assert.NotNil(t, rolo.GetRootIndex())
	rolo.Resolve()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 1)
	assert.Len(t, rolo.GetCaughtErrors(), 0)

}

func TestRolodex_CircularReferencesPostCheck(t *testing.T) {

	var d = `openapi: 3.1.0
components:
  schemas:
    bingo:
       type: object
       properties:
         bango:
           $ref: "#/components/schemas/bingo"
       required:
        - bango`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(d), &rootNode)

	c := CreateClosedAPIIndexConfig()
	c.AvoidCircularReferenceCheck = true
	rolo := NewRolodex(c)
	rolo.SetRootNode(&rootNode)
	_ = rolo.IndexTheRolodex()
	assert.NotNil(t, rolo.GetRootIndex())
	rolo.CheckForCircularReferences()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 0)
	assert.Len(t, rolo.GetCaughtErrors(), 1)
	assert.Len(t, rolo.GetRootIndex().GetResolver().GetInfiniteCircularReferences(), 1)
	assert.Len(t, rolo.GetRootIndex().GetResolver().GetSafeCircularReferences(), 0)

}

func TestRolodex_CircularReferencesArrayIgnored(t *testing.T) {

	var d = `openapi: 3.1.0
components:
  schemas:
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "array"
          items:
            $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(d), &rootNode)

	c := CreateClosedAPIIndexConfig()
	c.IgnoreArrayCircularReferences = true
	rolo := NewRolodex(c)
	rolo.SetRootNode(&rootNode)
	_ = rolo.IndexTheRolodex()
	rolo.CheckForCircularReferences()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 1)
	assert.Len(t, rolo.GetCaughtErrors(), 0)

}

func TestRolodex_CircularReferencesArrayIgnored_Resolve(t *testing.T) {

	var d = `openapi: 3.1.0
components:
  schemas:
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "array"
          items:
            $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(d), &rootNode)

	c := CreateClosedAPIIndexConfig()
	c.IgnoreArrayCircularReferences = true
	rolo := NewRolodex(c)
	rolo.SetRootNode(&rootNode)
	_ = rolo.IndexTheRolodex()
	rolo.Resolve()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 1)
	assert.Len(t, rolo.GetCaughtErrors(), 0)

}

func TestRolodex_CircularReferencesArrayIgnored_PostCheck(t *testing.T) {

	var d = `openapi: 3.1.0
components:
  schemas:
    ProductCategory:
      type: "object"
      properties:
        name:
          type: "string"
        children:
          type: "array"
          items:
            $ref: "#/components/schemas/ProductCategory"
          description: "Array of sub-categories in the same format."
      required:
        - "name"
        - "children"`

	var rootNode yaml.Node
	_ = yaml.Unmarshal([]byte(d), &rootNode)

	c := CreateClosedAPIIndexConfig()
	c.IgnoreArrayCircularReferences = true
	c.AvoidCircularReferenceCheck = true
	rolo := NewRolodex(c)
	rolo.SetRootNode(&rootNode)
	_ = rolo.IndexTheRolodex()
	rolo.CheckForCircularReferences()
	assert.Len(t, rolo.GetIgnoredCircularReferences(), 1)
	assert.Len(t, rolo.GetCaughtErrors(), 0)

}

func TestHumanFileSize(t *testing.T) {

	// test bytes for different units
	assert.Equal(t, "1 B", HumanFileSize(1))
	assert.Equal(t, "1 KB", HumanFileSize(1024))
	assert.Equal(t, "1 MB", HumanFileSize(1024*1024))

}