//
//  task.c
//  skuska 2
//
//  Created by Martin Senitka on 24/05/16.
//  Copyright © 2016 Martin Senitka. All rights reserved.
//

#include "task.h"
#include <stdlib.h>
#include <string.h>

struct task* add_task(struct task* first, struct task* new){


    if(first == NULL){

        first=new;
        return first;
    }

    struct task* pom = first;

    while(pom->next!=NULL){

        pom = pom->next;

    }

    pom->next = new;

    return first;
}



struct task* create_task(char* description,bool active){

    if (description == NULL || strlen(description)==0) {
        return NULL;
    }

    struct task* akt = (struct task*)calloc(1, sizeof(struct task));


    akt->description=description;

    akt->active=active;

    akt->next=NULL;


    return akt;
}



bool is_active(struct task* task){


    if(task==NULL){
        return false;
    }
    else{

        return task->active;
    }

}


void set_task_active(struct task* task){


    if(task==NULL){
        return;

    }else{

        task->active=true;
    }



}


void set_task_inactive(struct task* task){

    if(task == NULL){
        return;
    }else{

        task->active=false;
    }

}

struct task* delete_completed(struct task* first){

    if(first==NULL){
        return NULL;
    }

    //mazanie zaciatku
    struct task* akt = first;
    struct task* prev;

    while (first!=NULL && first->active==false) {
        akt=first;
        first=akt->next;
        /*if (akt->description!=NULL) {
            free(akt->description);
        }*/
        free(akt);
    }


    if (first==NULL) {
        return NULL;
    }

    prev =first;
    akt= first->next;

    while (akt!=NULL) {

        if (akt->active==false) {
            prev->next = akt->next;
            /*if (akt->description==NULL) {
                free(akt->description);
            }*/
            free(akt);
            akt=prev->next;
        }else{
            prev=akt;
            akt=akt->next;

        }


    }

    return first;

}


void print_tasks(struct task* first){

    if (first== NULL) {
        return;
    }

    struct task* akt = first;

    printf("\n ZOZNAM ULOH: \n");

    while (akt!=NULL ) {
        printf("   %s\n", akt->description);
        akt=akt->next;
    }



}