-module(sprocket@html).
-compile([no_auto_import, nowarn_unused_vars]).

-export([el/3, dangerous_raw_html/1, text/1, keyed/2, debug/3, html/2, head/2, meta/1, link/1, script/2, body/2, 'div'/2, span/2, i/2, button/2, h1/2, p/2, a/2, input/1, aside/2]).

-spec el(
    binary(),
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
el(Tag, Attrs, Children) ->
    {element, Tag, Attrs, Children}.

-spec dangerous_raw_html(binary()) -> sprocket@element:element().
dangerous_raw_html(Html) ->
    {raw, Html}.

-spec safe_replace_char(binary()) -> binary().
safe_replace_char(Key) ->
    case Key of
        <<"&"/utf8>> ->
            <<"&amp;"/utf8>>;

        <<"<"/utf8>> ->
            <<"&lt;"/utf8>>;

        <<">"/utf8>> ->
            <<"&gt;"/utf8>>;

        <<"\""/utf8>> ->
            <<"&quot;"/utf8>>;

        <<"'"/utf8>> ->
            <<"&#39;"/utf8>>;

        <<"/"/utf8>> ->
            <<"&#x2F;"/utf8>>;

        <<"`"/utf8>> ->
            <<"&#x60;"/utf8>>;

        <<"="/utf8>> ->
            <<"&#x3D;"/utf8>>;

        _ ->
            Key
    end.

-spec escape_html(binary()) -> sprocket@element:element().
escape_html(Unsafe) ->
    _pipe = gleam@string:to_graphemes(Unsafe),
    _pipe@1 = gleam@list:fold(
        _pipe,
        gleam@string_builder:new(),
        fun(Sb, Grapheme) ->
            gleam@string_builder:append(Sb, safe_replace_char(Grapheme))
        end
    ),
    _pipe@2 = gleam@string_builder:to_string(_pipe@1),
    {safe_html, _pipe@2}.

-spec text(binary()) -> sprocket@element:element().
text(Text) ->
    escape_html(Text).

-spec keyed(binary(), sprocket@element:element()) -> sprocket@element:element().
keyed(Key, Element) ->
    {keyed, Key, Element}.

-spec debug(
    binary(),
    gleam@option:option(gleam@dynamic:dynamic()),
    sprocket@element:element()
) -> sprocket@element:element().
debug(Id, Meta, Element) ->
    {debug, Id, Meta, Element}.

-spec html(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
html(Attrs, Children) ->
    el(<<"html"/utf8>>, Attrs, Children).

-spec head(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
head(Attrs, Children) ->
    el(<<"head"/utf8>>, Attrs, Children).

-spec meta(list(sprocket@html@attribute:attribute())) -> sprocket@element:element().
meta(Attrs) ->
    el(<<"meta"/utf8>>, Attrs, []).

-spec link(list(sprocket@html@attribute:attribute())) -> sprocket@element:element().
link(Attrs) ->
    el(<<"link"/utf8>>, Attrs, []).

-spec script(
    list(sprocket@html@attribute:attribute()),
    gleam@option:option(binary())
) -> sprocket@element:element().
script(Attrs, Body) ->
    case Body of
        {some, Body@1} ->
            el(<<"script"/utf8>>, Attrs, [text(Body@1)]);

        none ->
            el(<<"script"/utf8>>, Attrs, [])
    end.

-spec body(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
body(Attrs, Children) ->
    el(<<"body"/utf8>>, Attrs, Children).

-spec 'div'(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
'div'(Attrs, Children) ->
    el(<<"div"/utf8>>, Attrs, Children).

-spec span(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
span(Attrs, Children) ->
    el(<<"span"/utf8>>, Attrs, Children).

-spec i(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
i(Attrs, Children) ->
    el(<<"i"/utf8>>, Attrs, Children).

-spec button(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
button(Attrs, Children) ->
    el(<<"button"/utf8>>, Attrs, Children).

-spec h1(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
h1(Attrs, Children) ->
    el(<<"h1"/utf8>>, Attrs, Children).

-spec p(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
p(Attrs, Children) ->
    el(<<"p"/utf8>>, Attrs, Children).

-spec a(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
a(Attrs, Children) ->
    el(<<"a"/utf8>>, Attrs, Children).

-spec input(list(sprocket@html@attribute:attribute())) -> sprocket@element:element().
input(Attrs) ->
    el(<<"input"/utf8>>, Attrs, []).

-spec aside(
    list(sprocket@html@attribute:attribute()),
    list(sprocket@element:element())
) -> sprocket@element:element().
aside(Attrs, Children) ->
    el(<<"aside"/utf8>>, Attrs, Children).