// Copyright 2021 CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package trim

import (
	"fmt"
	"strings"

	"cuelang.org/go/internal/core/adt"
)

func (t *trimmer) trace(v *adt.Vertex) (*trimmer, *adt.Vertex) {
	if t.debug {
		t.indent++
		fmt.Fprintf(t.w, "%s%s {\n",
			strings.Repeat("..", t.indent),
			v.Label.SelectorString(t.ctx))
	}
	return t, v
}

func un(t *trimmer, v *adt.Vertex) {
	if !t.debug {
		return
	}
	fmt.Fprintf(t.w, "%s}\n",
		strings.Repeat("..", t.indent))
	t.indent--
}

func (t *trimmer) logf(format string, args ...interface{}) {
	if !t.debug {
		return
	}
	fmt.Fprint(t.w, strings.Repeat("..", t.indent+1))
	fmt.Fprintf(t.w, format, args...)
	fmt.Fprintln(t.w)
}