#include <stddef.h>
#include <string.h>
#include <dirent.h>
#include <sys/types.h>
#include <errno.h>

#include "cms_page.h"
#include "cms_err.h"
#include <stdlib.h>

#define PREFIX_LENGTH 5

cms_page* cms_page_create()
{
	cms_page* page = malloc(sizeof(cms_page));
	page->_str = NULL;
	page->title = NULL;
	page->slug = NULL;
	page->numposts = 0;
	page->numsubs = 0;
	page->posts = NULL;
	page->subs = NULL;
	return page;
}

cms_err* cms_page_parse(cms_page* page, char* str, char* slugstr)
{
	//Adding 1 because strlen() returns the length without \0
	size_t len = strlen(str) + 1;

	page->_str = malloc(len * sizeof(char));
	if (page->_str == NULL)
		return cms_err_create(CMS_ERR_ALLOC, NULL);

	memcpy(page->_str, str, len * sizeof(char));

	//The page's title will be the first line.
	page->title = page->_str;

	//Replace newlines with \0
	for (size_t i = 0; i < len; ++i)
	{
		char c = str[i];

		switch (c)
		{
		case '\n':
		case '\r':
			page->_str[i] = '\0';
			break;
		}
	}

	//Strip out the leading "xxxx-" from slugstr (the filename)
	//to get the real slug
	size_t slugstrlen = strlen(slugstr);
	page->slug = malloc((slugstrlen + 1 - PREFIX_LENGTH) * sizeof(char));
	if (page->slug == NULL)
		return cms_err_create(CMS_ERR_ALLOC, NULL);

	memcpy(page->slug, slugstr + PREFIX_LENGTH, (slugstrlen - PREFIX_LENGTH));

	//Add \0 to the end of the string
	page->slug[slugstrlen - PREFIX_LENGTH] = '\0';

	return cms_err_create(CMS_ERR_NONE, NULL);
}

cms_err* cms_page_add_post(cms_page* page, cms_post* post)
{
	page->numposts += 1;

	page->posts = realloc(page->posts, page->numposts * sizeof(cms_post));
	if (page->posts == NULL)
		return cms_err_create(CMS_ERR_ALLOC, NULL);

	page->posts[page->numposts - 1] = *post;

	return cms_err_create(CMS_ERR_NONE, NULL);
}

cms_err* cms_page_add_sub(cms_page* page, cms_page* sub)
{
	page->numsubs += 1;
	page->subs = realloc(page->subs, page->numsubs * sizeof(cms_page));
	if (page->subs == NULL)
		return cms_err_create(CMS_ERR_ALLOC, NULL);

	page->subs[page->numsubs - 1] = *sub;

	return cms_err_create(CMS_ERR_NONE, NULL);
}