package utils

import (
	"net/http"
	"reflect"
	"testing"
)

type schedulerTaskImplDummy struct {
}

func (s schedulerTaskImplDummy) BasicAuth() (string, string) {
	return "", ""
}

func (s schedulerTaskImplDummy) UriPath() string {
	return ""
}

func (s schedulerTaskImplDummy) SendError(_ error) {
	return
}

func (s schedulerTaskImplDummy) SendStatusCode(_ int) {
	return
}

func (s schedulerTaskImplDummy) SendResponse(_ *http.Response) {
	return
}

func TestQueue_Pop(t *testing.T) {
	type fields struct {
		elements []SchedulerTask
	}
	tests := []struct {
		name    string
		fields  fields
		want    SchedulerTask
		wantErr bool
	}{
		{
			name:    "Pop element of empty list",
			fields:  fields{},
			want:    nil,
			wantErr: true,
		},
		{
			name: "Pop element of a filled list with three elements",
			fields: fields{elements: []SchedulerTask{
				schedulerTaskImplDummy{},
				schedulerTaskImplDummy{},
				schedulerTaskImplDummy{},
			}},
			want:    schedulerTaskImplDummy{},
			wantErr: false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			queue := &Queue{
				tasks: tt.fields.elements,
			}
			got, err := queue.Pop()
			if (err != nil) != tt.wantErr {
				t.Errorf("Pop() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("Pop() got = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestQueue_Push(t *testing.T) {
	t.Run("Push tasks to empty queue", func(t *testing.T) {
		queue := Queue{tasks: []SchedulerTask{}, notifyChannel: make(chan bool)}
		go queue.WaitForElement()
		task := schedulerTaskImplDummy{}
		err := queue.Push(task)
		if err != nil {
			t.Errorf("Push() error = %v", err)
		}
		if len(queue.tasks) != 1 {
			t.Errorf("Push() error = queue is not one")
		}
		if queue.tasks[0] != task {
			t.Errorf("Push() error = wrong queue task in queue")
		}
	})
	t.Run("Push tasks to filled queue", func(t *testing.T) {
		queue := Queue{tasks: []SchedulerTask{schedulerTaskImplDummy{}}, notifyChannel: make(chan bool)}
		go queue.WaitForElement()
		task := schedulerTaskImplDummy{}
		err := queue.Push(task)
		if err != nil {
			t.Errorf("Push() error = %v", err)
		}
		if len(queue.tasks) != 2 {
			t.Errorf("Push() error = queue is not two")
		}
		if queue.tasks[1] != task {
			t.Errorf("Push() error = wrong queue task in queue")
		}
	})
}