// Copyright (c) 2021 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package zapcore

import (
	"time"
)

// DefaultClock is the default clock used by Zap in operations that require
// time. This clock uses the system clock for all operations.
var DefaultClock = systemClock{}

// Clock is a source of time for logged entries.
type Clock interface {
	// Now returns the current local time.
	Now() time.Time

	// NewTicker returns *time.Ticker that holds a channel
	// that delivers "ticks" of a clock.
	NewTicker(time.Duration) *time.Ticker
}

// systemClock implements default Clock that uses system time.
type systemClock struct{}

func (systemClock) Now() time.Time {
	return time.Now()
}

func (systemClock) NewTicker(duration time.Duration) *time.Ticker {
	return time.NewTicker(duration)
}