#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ucore/tailq.h>
#include <ucore/utils.h>

struct Block {
    char text[64];
    struct TailQ blocks;
};

struct File {
   char name[128];
   struct TailQ head;
};

void add_block(struct File *f, const char *txt)
{
   struct Block *b = malloc(sizeof *b);
   strcpy(b->text,txt); 
   uc_tailq_insert_tail(&f->head, &b->blocks);
}

void print_file(struct File *f)
{
    struct TailQ *entry;
    printf("File: %s\n", f->name);
    UC_TAILQ_FOREACH(entry, &f->head) {
        struct Block *b = UC_CONTAINER_OF(entry, struct Block, blocks);
        printf("Block: %s\n", b->text);
    }
}

void delete_block(struct File *f, const char *txt)
{
    struct TailQ *entry, *next;
    UC_TAILQ_FOREACH_SAFE(entry, next, &f->head) {
        struct Block *b = UC_CONTAINER_OF(entry, struct Block, blocks);
        if (strcmp(txt, b->text) == 0) {
            uc_tailq_remove(entry);
            free(b);
        }
    }
}

void delete_all_blocks(struct File *f)
{
    struct TailQ *entry, *next;
    UC_TAILQ_FOREACH_SAFE(entry, next, &f->head) {
        struct Block *b = UC_CONTAINER_OF(entry, struct Block, blocks);
        free(b);
    }
    uc_tailq_init(&f->head);
}

int main(void)
{
    struct File f;
    uc_tailq_init(&f.head);
    printf("Is Empty: %d\n", uc_tailq_empty(&f.head));
    strcpy(f.name,"Test.f");
    add_block(&f,"one");
    add_block(&f,"two");
    add_block(&f,"three");

    print_file(&f);
    printf("Is Empty: %d\n", uc_tailq_empty(&f.head));

    puts("\nDeleting three");
    delete_block(&f, "three");
    print_file(&f);

    puts("\nAdding 2 blocks");
    add_block(&f,"three");
    add_block(&f,"three");
    print_file(&f);

    puts("\nDeleting three");
    delete_block(&f, "three");
    print_file(&f);

    delete_all_blocks(&f);
    printf("Is Empty: %d\n", uc_tailq_empty(&f.head));


    return 0;
}