package services

import "fmt"

type taskService struct {
	tasks map[int]string
}

func NewTaskService() *taskService {
	return &taskService{
		tasks: make(map[int]string, 0),
	}
}

func (r *taskService) Insert(key int, v string) error {
	if _, found := r.tasks[key]; found {
		return fmt.Errorf("already exist %d", key)
	}
	r.tasks[key] = v
	return nil
}
func (r *taskService) List() map[int]string {
	return r.tasks
}

func (r *taskService) Show(key int) string {
	if task, found := r.tasks[key]; found {
		return task
	}
	return ""
}

func (r *taskService) Delete(key int) error {
	if _, found := r.tasks[key]; !found {
		return fmt.Errorf("task with key %d not found", key)
	}
	delete(r.tasks, key)
	return nil
}

func (r *taskService) Update(key int, newTask string) error {
	if _, found := r.tasks[key]; !found {
		return fmt.Errorf("task with key %d not found", key)
	}
	r.tasks[key] = newTask
	return nil
}