// Copyright 2024 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.

package range_checker

import (
	"fmt"
	"sync/atomic"
)

// BoolRangeChecker is a range checker that always returns the same value.
type BoolRangeChecker struct {
	covered atomic.Bool
}

func NewBoolRangeChecker(covered bool) *BoolRangeChecker {
	boolRangeChecker := &BoolRangeChecker{}
	boolRangeChecker.covered.Store(covered)
	return boolRangeChecker
}

// AddSubRange adds a sub table pan to the range checker.
func (f *BoolRangeChecker) AddSubRange(_ int64, _, _ []byte) {
}

// IsFullyCovered checks if the entire range from start to end is covered.
func (f *BoolRangeChecker) IsFullyCovered() bool {
	return f.covered.Load()
}

// Reset resets the range checker reported sub spans
func (f *BoolRangeChecker) Reset() {
}

func (f *BoolRangeChecker) Detail() string {
	return fmt.Sprintf("covered: %v", f.covered.Load())
}

func (f *BoolRangeChecker) MarkCovered() {
	f.covered.Store(true)
}