package ckconfig

import (
	"reflect"
	"testing"
)

func TestDecodeJSONPointerPreservesSemanticTokens(t *testing.T) {
	tests := []struct {
		pointer string
		want    []string
	}{
		{pointer: "", want: nil},
		{pointer: "/", want: []string{""}},
		{pointer: "/parent/child", want: []string{"parent", "child"}},
		{pointer: "/0/../a.b/50%", want: []string{"0", "..", "a.b", "50%"}},
		{pointer: "/a~1b/c~0d", want: []string{"a/b", "c~d"}},
		{pointer: "/~01", want: []string{"~1"}},
	}
	for _, test := range tests {
		got, err := decodeJSONPointer(test.pointer)
		if err != nil {
			t.Fatalf("decode %q: %v", test.pointer, err)
		}
		if !reflect.DeepEqual(got, test.want) {
			t.Errorf("decode %q = %#v, want %#v", test.pointer, got, test.want)
		}
	}
	for _, pointer := range []string{"missing-leading-slash", "/bad~", "/bad~2escape"} {
		if _, err := decodeJSONPointer(pointer); err == nil {
			t.Errorf("decode %q unexpectedly succeeded", pointer)
		}
	}
}

func TestPlaceReportValue(t *testing.T) {
	var root any = map[string]any{}
	var err error
	root, err = placeReportValue(root, []string{"a/b", "~1"}, false)
	if err != nil {
		t.Fatal(err)
	}
	root, err = placeReportValue(root, []string{""}, nil)
	if err != nil {
		t.Fatal(err)
	}
	want := map[string]any{"a/b": map[string]any{"~1": false}, "": nil}
	if !reflect.DeepEqual(root, want) {
		t.Fatalf("got %#v", root)
	}
	if _, err := placeReportValue(root, []string{"a/b", "~1", "child"}, 1); err == nil {
		t.Fatal("scalar ancestor accepted")
	}
	if value, err := placeReportValue(root, nil, "replacement"); err != nil || value != "replacement" {
		t.Fatalf("root: %#v, %v", value, err)
	}
}