package utils

import (
	"reflect"
	"testing"
)

func TestQueue_Pop(t *testing.T) {
	type fields struct {
		elements []Task
	}
	tests := []struct {
		name    string
		fields  fields
		want    Task
		wantErr bool
	}{
		{
			name:    "Pop element of empty list",
			fields:  fields{},
			want:    Task{},
			wantErr: true,
		},
		{
			name: "Pop element of a filled list with three elements",
			fields: fields{elements: []Task{
				{URL: "https://e621.net0....", Methode: "GET", Channel: nil},
				{URL: "https://e621.net1....", Methode: "GET", Channel: nil},
				{URL: "https://e621.net2....", Methode: "GET", Channel: nil},
			}},
			want: Task{
				URL:     "https://e621.net0....",
				Methode: "GET",
				Channel: nil,
			},
			wantErr: false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			queue := &Queue{
				elements: 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{elements: []Task{}}
		task := Task{
			URL:     "http://e621.net0....",
			Methode: "GET",
			Channel: nil,
		}
		err := queue.Push(task)
		if err != nil {
			t.Errorf("Push() error = %v", err)
		}
		if len(queue.elements) != 1 {
			t.Errorf("Push() error = queue is not one")
		}
		if queue.elements[0] != task {
			t.Errorf("Push() error = wrong queue task in queue")
		}
	})
	t.Run("Push tasks to filled queue", func(t *testing.T) {
		queue := Queue{elements: []Task{{
			URL:     "http://e621.net0....",
			Methode: "GET",
			Channel: nil,
		}}}
		task := Task{
			URL:     "http://e621.net1....",
			Methode: "GET",
			Channel: nil,
		}
		err := queue.Push(task)
		if err != nil {
			t.Errorf("Push() error = %v", err)
		}
		if len(queue.elements) != 2 {
			t.Errorf("Push() error = queue is not two")
		}
		if queue.elements[1] != task {
			t.Errorf("Push() error = wrong queue task in queue")
		}
	})
}