// Copyright 2023 Harness, 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,
// 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 job

import (
	"testing"
	"time"
)

func TestSchedulerTimer_ResetAt(t *testing.T) {
	now := time.Now()
	tests := []struct {
		name string
		at   time.Time
		exp  time.Duration
	}{
		{
			name: "zero",
			at:   time.Time{},
			exp:  timerMinDur,
		},
		{
			name: "immediate",
			at:   now,
			exp:  timerMinDur,
		},
		{
			name: "30s",
			at:   now.Add(30 * time.Second),
			exp:  30 * time.Second,
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			timer := newSchedulerTimer()
			dur := timer.resetAt(now, test.at, false)
			if want, got := test.exp, dur; want != dur {
				t.Errorf("want: %s, got: %s", want.String(), got.String())
			}
		})
	}
}

func TestSchedulerTimer_TryResetAt(t *testing.T) {
	now := time.Now()
	tests := []struct {
		name string
		at   time.Time
		edgy bool
		exp  time.Duration
	}{
		{
			name: "past",
			at:   now.Add(-time.Second),
			exp:  timerMinDur,
		},
		{
			name: "30s",
			at:   now.Add(30 * time.Second),
			exp:  30 * time.Second,
		},
		{
			name: "90s",
			at:   now.Add(90 * time.Second),
			exp:  0,
		},
		{
			name: "30s-edgy",
			at:   now.Add(30 * time.Second),
			edgy: true,
			exp:  timerMinDur,
		},
		{
			name: "90s-edgy",
			at:   now.Add(90 * time.Second),
			edgy: true,
			exp:  timerMinDur,
		},
		{
			name: "zero",
			at:   time.Time{},
			exp:  0,
		},
		{
			name: "zero-edgy",
			at:   time.Time{},
			edgy: true,
			exp:  timerMinDur,
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			timer := newSchedulerTimer()
			timer.resetAt(now, now.Add(time.Minute), test.edgy)
			dur := timer.rescheduleEarlier(now, test.at)
			if want, got := test.exp, dur; want != dur {
				t.Errorf("want: %s, got: %s", want.String(), got.String())
			}
		})
	}
}