#include "form.h"
#include "defs.h"
#include <libweb/html.h>
#include <stdio.h>
#include <string.h>

static int poweredby(struct html_node *const footer)
{
    int ret = -1;
    struct html_node *const a = html_node_alloc("a"), *p;
    struct dynstr d;

    dynstr_init(&d);

    if (!a)
    {
        fprintf(stderr, "%s: html_node_alloc failed\n", __func__);
        goto end;
    }
    else if (!(p = html_node_add_child(footer, "p")))
    {
        fprintf(stderr, "%s: html_node_add_child failed\n", __func__);
        goto end;
    }
    else if (html_node_add_attr(a, "href", PROJECT_URL))
    {
        fprintf(stderr, "%s: html_node_add_attr failed\n", __func__);
        goto end;
    }
    else if (html_node_set_value(a, PROJECT_NAME))
    {
        fprintf(stderr, "%s: html_node_set_value a failed\n", __func__);
        goto end;
    }
    else if (dynstr_append(&d, "Powered by&nbsp;"))
    {
        fprintf(stderr, "%s: dynstr_append failed\n", __func__);
        goto end;
    }
    else if (html_serialize(a, &d))
    {
        fprintf(stderr, "%s: html_serialize failed\n", __func__);
        goto end;
    }
    else if (html_node_set_value_unescaped(p, d.str))
    {
        fprintf(stderr, "%s: html_node_set_value_unescaped failed\n", __func__);
        goto end;
    }

    ret = 0;

end:
    dynstr_free(&d);
    html_node_free(a);
    return ret;
}

static int back(struct html_node *const footer)
{
    struct html_node *const a = html_node_add_child(footer, "a");

    if (!a)
    {
        fprintf(stderr, "%s: html_node_add_child failed\n", __func__);
        return -1;
    }
    else if (html_node_add_attr(a, "href", "/"))
    {
        fprintf(stderr, "%s: html_node_add_attr failed\n", __func__);
        return -1;
    }
    else if (html_node_set_value(a, "Back to index"))
    {
        fprintf(stderr, "%s: html_node_set_value failed\n", __func__);
        return -1;
    }

    return 0;
}

int form_footer(struct html_node *const n, const char *const resource)
{
    struct html_node *const footer = html_node_add_child(n, "footer");

    if (!footer)
    {
        fprintf(stderr, "%s: html_node_add_child failed\n", __func__);
        return -1;
    }
    else if (strcmp(resource, "/")
        && strcmp(resource, "/index.html")
        && back(footer))
    {
        fprintf(stderr, "%s: back failed\n", __func__);
        return -1;
    }
    else if (poweredby(footer))
    {
        fprintf(stderr, "%s: poweredby failed\n", __func__);
        return -1;
    }

    return 0;
}