/*
Copyright 2021 The KubeEdge 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 trigger

import "testing"
import "time"

func TestTimerInRange(t *testing.T) {
	now := time.Now()
	hour, _ := time.ParseDuration("1h")

	var timerTest = []struct {
		start    time.Time
		end      time.Time
		expected bool
	}{
		{now.Add(-hour), now.Add(hour), true},
		{now.Add(-2 * hour), now.Add(-hour), false},
		{now.Add(hour), now.Add(2 * hour), false},
		{now.Add(hour), now.Add(-hour), false},
		{now.Add(2 * hour), now.Add(hour), true},
	}

	for _, tt := range timerTest {
		var timer = make(map[string]string)
		timer["start"] = tt.start.Format("15:04")
		timer["end"] = tt.end.Format("15:04")

		triggerExpr := map[string]interface{}{
			"timer": timer,
		}
		tg, _ := NewTrigger(triggerExpr)
		stats := make(map[string]interface{})
		if tg.Trigger(stats) != tt.expected {
			t.Errorf("failed to trigger timer %v, expected=%v", timer, tt.expected)
		}
	}
}

func TestCondition(t *testing.T) {
	metric := "numOfSamples"
	stats := map[string]interface{}{
		metric: 500,
	}
	var samplesTest = []struct {
		operator  string
		threshold interface{}
		expected  bool
	}{
		{"gt", 499, true},
		{">", 499, true},
		{"gt", 500, false},
		{">", 500, false},
		{"ge", 501, false},
		{">=", 501, false},
		{"ge", 500, true},
		{">=", 500, true},
		{"eq", 500, true},
		{"=", 500, true},
		{"=", 501, false},
		{"!=", 500, false},
		{"!=", 501, true},
		{"lt", 501, true},
		{"<", 501, true},
		{"lt", 500, false},
		{"<", 500, false},
		{"le", 501, true},
		{"<=", 501, true},
		{"le", 500, true},
		{"<=", 500, true},
		{"le", 499, false},
		{"<=", 499, false},
	}

	for _, st := range samplesTest {
		var condition = make(map[string]interface{})
		condition["operator"] = st.operator
		condition["metric"] = metric
		condition["threshold"] = st.threshold

		trigger := map[string]interface{}{
			"condition": condition,
		}
		tg, _ := NewTrigger(trigger)
		if st.expected != tg.Trigger(stats) {
			t.Errorf("failed to trigger condition:%+v, expected:%v", condition, st.expected)
		}
	}
}

func TestIndexCondition(t *testing.T) {
	metric := "pricision_delta"
	subMetric := metric + "[1]"

	stats := map[string]interface{}{
		metric: []float32{0.1, 0.2},
	}
	var samplesTest = []struct {
		operator  string
		threshold float32
		expected  bool
	}{
		{"gt", 0.3, false},
		{"gt", 0.2, false},
		{"gt", 0.1, true},
		{"ge", 0.2, true},
	}

	for _, st := range samplesTest {
		var condition = make(map[string]interface{})
		condition["operator"] = st.operator
		condition["metric"] = subMetric
		condition["threshold"] = st.threshold

		trigger := map[string]interface{}{
			"condition": condition,
		}
		tg, _ := NewTrigger(trigger)
		if st.expected != tg.Trigger(stats) {
			t.Errorf("failed to trigger condition:%+v, expected:%v", condition, st.expected)
		}
	}
}

func TestTimerAndCondition(t *testing.T) {
	now := time.Now()
	hour, _ := time.ParseDuration("1h")
	metric := "numOfSamples"
	stats := map[string]interface{}{
		metric: 500,
	}
	var samplesTest = []struct {
		start     time.Time
		end       time.Time
		operator  string
		threshold int
		expected  bool
	}{
		{now.Add(-hour), now.Add(hour), "ge", 500, true},
		{now.Add(-hour), now.Add(hour), "ge", 600, false},
		{now.Add(-2 * hour), now.Add(-hour), "ge", 500, false},
	}
	for _, st := range samplesTest {
		var timer = make(map[string]interface{})
		timer["start"] = st.start.Format("15:04")
		timer["end"] = st.end.Format("15:04")
		var condition = make(map[string]interface{})
		condition["operator"] = st.operator
		condition["metric"] = metric
		condition["threshold"] = st.threshold

		trigger := map[string]interface{}{
			"timer":     timer,
			"condition": condition,
		}
		tg, _ := NewTrigger(trigger)
		if tg.Trigger(stats) != st.expected {
			t.Errorf("failed to trigger %v, expected=%v", trigger, st.expected)
		}
	}
}