enum Status {
    DONE = "Done", IN_PROGRESS = "In progress"
}

enum Priority {
    HIGH = "high", LOW = "low"
}

interface Task {
    name: string,
    status: Status,
    priority: Priority
}

class TaskRepository {
    private tasks: Array<Task> = [];

    public getAllTasks(): Array<Task> {
        return this.tasks.sort((t1, t2) => {
            if (t1.status === Status.DONE && t2.status === Status.DONE) {
                return 0;
            }
            if (t1.status === Status.DONE && t2.status !== Status.DONE) {
                return 1;
            }
            return -1;
        });
    }

    public addTask(name: string): void {
        this.tasks.push({name, status: Status.IN_PROGRESS, priority: Priority.HIGH});
    }

    public changeTask(name: string, status: Status, priority: Priority): void {
        const taskToChange: Array<Task> = this.tasks.filter(t => t.name === name);

        if (taskToChange.length < 1) {
            return;
        }

        taskToChange[0].status = status;
        taskToChange[0].priority = priority;
    }

    public deleteTaskByName(name: string): void {
        const newTasks = this.tasks.filter(t => t.name !== name);
        this.tasks = newTasks;
    }
}


const taskRepo = new TaskRepository();
taskRepo.addTask("create a post");
console.log("Add create a post task:")
console.log(taskRepo.getAllTasks());


taskRepo.changeTask("create a post", Status.DONE, Priority.LOW);
console.log("Modify create a post task:")
console.log(taskRepo.getAllTasks());

taskRepo.addTask("have a walk");
console.log("Add have a walk task:")
console.log(taskRepo.getAllTasks());

taskRepo.deleteTaskByName("create a post")
console.log("Delete create a post task:")
console.log(taskRepo.getAllTasks());