#define _POSIX_C_SOURCE 200809L

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

static int anonymous(struct html_node *const n)
{
    struct html_node *div, *form, *luser, *iuser, *lpass, *ipass, *submit,
        *signup;

    if (!(div = html_node_add_child(n, "div"))
        || !(form = html_node_add_child(div, "form"))
        || !(luser = html_node_add_child(form, "label"))
        || !(iuser = html_node_add_child(form, "input"))
        || !(lpass = html_node_add_child(form, "label"))
        || !(ipass = html_node_add_child(form, "input"))
        || !(submit = html_node_add_child(form, "input"))
        || !(signup = html_node_add_child(div, "a")))
    {
        fprintf(stderr, "%s: html_node_add_child failed\n", __func__);
        return -1;
    }
    else if (html_node_add_attr(form, "action", "/login")
        || html_node_add_attr(form, "form", "loginform")
        || html_node_add_attr(form, "method", "post")
        || html_node_add_attr(luser, "for", "username")
        || html_node_add_attr(lpass, "for", "password")
        || html_node_add_attr(iuser, "type", "text")
        || html_node_add_attr(iuser, "id", "username")
        || html_node_add_attr(iuser, "name", "username")
        || html_node_add_attr(ipass, "type", "password")
        || html_node_add_attr(ipass, "id", "password")
        || html_node_add_attr(ipass, "name", "password")
        || html_node_add_attr(submit, "type", "submit")
        || html_node_add_attr(submit, "value", "Log in")
        || html_node_add_attr(signup, "href", "/signup"))
    {
        fprintf(stderr, "%s: html_node_add_attr failed\n", __func__);
        return -1;
    }
    else if (html_node_set_value(luser, "Username:")
        || html_node_set_value(lpass, "Password:")
        || html_node_set_value(signup, "Sign up"))
    {
        fprintf(stderr, "%s: html_node_set_value failed\n", __func__);
        return -1;
    }

    return 0;
}

static int loggedin(struct html_node *const n, const char *const username)
{
    int ret = -1;
    struct html_node *div, *p, *form, *submit, *a;
    struct dynstr d;

    dynstr_init(&d);

    if (!(div = html_node_add_child(n, "div"))
        || !(p = html_node_add_child(div, "p"))
        || !(form = html_node_add_child(div, "form"))
        || !(submit = html_node_add_child(form, "input"))
        || !(a = html_node_add_child(div, "a")))
    {
        fprintf(stderr, "%s: html_node_add_child failed\n", __func__);
        goto end;
    }
    else if (dynstr_append(&d, "Logged in as %s", username))
    {
        fprintf(stderr, "%s: dynstr_append failed\n", __func__);
        goto end;
    }
    else if (html_node_set_value(p, d.str)
        || html_node_set_value(a, "User control panel"))
    {
        fprintf(stderr, "%s: html_node_set_value failed\n", __func__);
        goto end;
    }
    else if (html_node_add_attr(form, "action", "/logout")
        || html_node_add_attr(form, "form", "logoutform")
        || html_node_add_attr(form, "method", "post")
        || html_node_add_attr(submit, "type", "submit")
        || html_node_add_attr(submit, "value", "Logout")
        || html_node_add_attr(a, "href", "/ucp"))
    {
        fprintf(stderr, "%s: html_node_add_attr failed\n", __func__);
        goto end;
    }

    ret = 0;

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

int form_login(struct html_node *const n, const char *const username)
{
    if (!username)
        return anonymous(n);

    return loggedin(n, username);
}