-module(commonmark@internal@html).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([sanitize_href_property/1, sanitize_plain_text/1, inline_to_html/2, block_to_html/3]).

-spec sanitize_href_property(binary()) -> binary().
sanitize_href_property(Prop) ->
    _pipe = Prop,
    _pipe@1 = gleam@string:replace(_pipe, <<"&"/utf8>>, <<"&amp;"/utf8>>),
    _pipe@2 = gleam@string:replace(_pipe@1, <<"\""/utf8>>, <<"%22"/utf8>>),
    gleam@string:replace(_pipe@2, <<"\\"/utf8>>, <<"%5C"/utf8>>).

-spec sanitize_plain_text(binary()) -> binary().
sanitize_plain_text(Text) ->
    _pipe = Text,
    _pipe@1 = gleam@string:replace(_pipe, <<"&"/utf8>>, <<"&amp;"/utf8>>),
    _pipe@2 = gleam@string:replace(_pipe@1, <<"\""/utf8>>, <<"&quot;"/utf8>>),
    _pipe@3 = gleam@string:replace(_pipe@2, <<"<"/utf8>>, <<"&lt;"/utf8>>),
    gleam@string:replace(_pipe@3, <<">"/utf8>>, <<"&gt;"/utf8>>).

-spec inline_to_html(
    commonmark@ast:inline_node(),
    gleam@dict:dict(binary(), commonmark@ast:reference_())
) -> binary().
inline_to_html(Inline, Refs) ->
    case Inline of
        {plain_text, Contents} ->
            _pipe = Contents,
            sanitize_plain_text(_pipe);

        hard_line_break ->
            <<"<br />\n"/utf8>>;

        soft_line_break ->
            <<"\n"/utf8>>;

        {uri_autolink, Href} ->
            <<<<<<<<"<a href=\""/utf8, (sanitize_href_property(Href))/binary>>/binary,
                        "\">"/utf8>>/binary,
                    Href/binary>>/binary,
                "</a>"/utf8>>;

        {email_autolink, Email} ->
            <<<<<<<<"<a href=\"mailto:"/utf8,
                            (sanitize_href_property(Email))/binary>>/binary,
                        "\">"/utf8>>/binary,
                    Email/binary>>/binary,
                "</a>"/utf8>>;

        {code_span, Contents@1} ->
            <<<<"<code>"/utf8,
                    (begin
                        _pipe@1 = Contents@1,
                        sanitize_plain_text(_pipe@1)
                    end)/binary>>/binary,
                "</code>"/utf8>>;

        {emphasis, Contents@2, _} ->
            <<<<"<em>"/utf8,
                    (begin
                        _pipe@2 = Contents@2,
                        _pipe@3 = gleam@list:map(
                            _pipe@2,
                            fun(_capture) -> inline_to_html(_capture, Refs) end
                        ),
                        gleam@string:join(_pipe@3, <<""/utf8>>)
                    end)/binary>>/binary,
                "</em>"/utf8>>;

        {strong_emphasis, Contents@3, _} ->
            <<<<"<strong>"/utf8,
                    (begin
                        _pipe@4 = Contents@3,
                        _pipe@5 = gleam@list:map(
                            _pipe@4,
                            fun(_capture@1) ->
                                inline_to_html(_capture@1, Refs)
                            end
                        ),
                        gleam@string:join(_pipe@5, <<""/utf8>>)
                    end)/binary>>/binary,
                "</strong>"/utf8>>;

        {strike_through, Contents@4} ->
            <<<<"<del>"/utf8,
                    (begin
                        _pipe@6 = Contents@4,
                        _pipe@7 = gleam@list:map(
                            _pipe@6,
                            fun(_capture@2) ->
                                inline_to_html(_capture@2, Refs)
                            end
                        ),
                        gleam@string:join(_pipe@7, <<""/utf8>>)
                    end)/binary>>/binary,
                "</del>"/utf8>>;

        {html_inline, Html} ->
            Html;

        {image, _, _} ->
            <<"Image"/utf8>>;

        {reference_link, _, _} ->
            <<"Link"/utf8>>;

        {link, _, _, _} ->
            <<"Link"/utf8>>
    end.

-spec block_to_html(
    commonmark@ast:block_node(),
    gleam@dict:dict(binary(), commonmark@ast:reference_()),
    boolean()
) -> binary().
block_to_html(Block, Refs, Tight) ->
    case Block of
        {code_block, none, _, Contents} ->
            <<<<"<pre><code>"/utf8,
                    (begin
                        _pipe = Contents,
                        sanitize_plain_text(_pipe)
                    end)/binary>>/binary,
                "</code></pre>\n"/utf8>>;

        {code_block, {some, Info}, _, Contents@1} ->
            <<<<<<<<"<pre><code class=\"language-"/utf8, Info/binary>>/binary,
                        "\">"/utf8>>/binary,
                    (begin
                        _pipe@1 = Contents@1,
                        sanitize_plain_text(_pipe@1)
                    end)/binary>>/binary,
                "</code></pre>\n"/utf8>>;

        {heading, Level, Contents@2} ->
            <<<<<<<<<<<<"<h"/utf8, (gleam@int:to_string(Level))/binary>>/binary,
                                ">"/utf8>>/binary,
                            (begin
                                _pipe@2 = Contents@2,
                                _pipe@3 = gleam@list:map(
                                    _pipe@2,
                                    fun(_capture) ->
                                        inline_to_html(_capture, Refs)
                                    end
                                ),
                                gleam@string:join(_pipe@3, <<""/utf8>>)
                            end)/binary>>/binary,
                        "</h"/utf8>>/binary,
                    (gleam@int:to_string(Level))/binary>>/binary,
                ">\n"/utf8>>;

        horizontal_break ->
            <<"<hr />\n"/utf8>>;

        {paragraph, Contents@3} when Tight ->
            _pipe@4 = Contents@3,
            _pipe@5 = gleam@list:map(
                _pipe@4,
                fun(_capture@1) -> inline_to_html(_capture@1, Refs) end
            ),
            gleam@string:join(_pipe@5, <<""/utf8>>);

        {paragraph, Contents@4} ->
            <<<<"<p>"/utf8,
                    (begin
                        _pipe@6 = Contents@4,
                        _pipe@7 = gleam@list:map(
                            _pipe@6,
                            fun(_capture@2) ->
                                inline_to_html(_capture@2, Refs)
                            end
                        ),
                        gleam@string:join(_pipe@7, <<""/utf8>>)
                    end)/binary>>/binary,
                "</p>\n"/utf8>>;

        {html_block, Html} ->
            <<Html/binary, "\n"/utf8>>;

        {block_quote, Contents@5} ->
            <<<<"<blockquote>\n"/utf8,
                    (begin
                        _pipe@8 = Contents@5,
                        _pipe@9 = gleam@list:map(
                            _pipe@8,
                            fun(_capture@3) ->
                                block_to_html(_capture@3, Refs, false)
                            end
                        ),
                        gleam@string:join(_pipe@9, <<""/utf8>>)
                    end)/binary>>/binary,
                "</blockquote>\n"/utf8>>;

        {ordered_list, Items, 1, _} ->
            <<<<"<ol>\n"/utf8,
                    (begin
                        _pipe@10 = Items,
                        _pipe@11 = gleam@list:map(
                            _pipe@10,
                            fun(_capture@4) ->
                                list_item_to_html(_capture@4, Refs)
                            end
                        ),
                        gleam@string:join(_pipe@11, <<""/utf8>>)
                    end)/binary>>/binary,
                "</ol>\n"/utf8>>;

        {ordered_list, Items@1, Start, _} ->
            <<<<<<<<"<ol start=\""/utf8, (gleam@int:to_string(Start))/binary>>/binary,
                        "\">\n"/utf8>>/binary,
                    (begin
                        _pipe@12 = Items@1,
                        _pipe@13 = gleam@list:map(
                            _pipe@12,
                            fun(_capture@5) ->
                                list_item_to_html(_capture@5, Refs)
                            end
                        ),
                        gleam@string:join(_pipe@13, <<""/utf8>>)
                    end)/binary>>/binary,
                "</ol>\n"/utf8>>;

        {unordered_list, Items@2, _} ->
            <<<<"<ul>\n"/utf8,
                    (begin
                        _pipe@14 = Items@2,
                        _pipe@15 = gleam@list:map(
                            _pipe@14,
                            fun(_capture@6) ->
                                list_item_to_html(_capture@6, Refs)
                            end
                        ),
                        gleam@string:join(_pipe@15, <<""/utf8>>)
                    end)/binary>>/binary,
                "</ul>\n"/utf8>>
    end.

-spec list_item_to_html(
    commonmark@ast:list_item(),
    gleam@dict:dict(binary(), commonmark@ast:reference_())
) -> binary().
list_item_to_html(Item, Refs) ->
    case Item of
        {list_item, []} ->
            <<"<li></li>\n"/utf8>>;

        {tight_list_item, []} ->
            <<"<li></li>\n"/utf8>>;

        {list_item, Contents} ->
            <<<<"<li>\n"/utf8,
                    (begin
                        _pipe = Contents,
                        _pipe@1 = gleam@list:map(
                            _pipe,
                            fun(_capture) ->
                                block_to_html(_capture, Refs, false)
                            end
                        ),
                        gleam@string:join(_pipe@1, <<""/utf8>>)
                    end)/binary>>/binary,
                "</li>\n"/utf8>>;

        {tight_list_item, Contents@1} ->
            R = begin
                _pipe@2 = Contents@1,
                lists:reverse(_pipe@2)
            end,
            Rest = begin
                _pipe@3 = R,
                _pipe@4 = gleam@list:drop(_pipe@3, 1),
                _pipe@5 = gleam@list:map(_pipe@4, fun(B) -> case B of
                            {paragraph, C} ->
                                block_to_html(
                                    {paragraph,
                                        gleam@list:concat(
                                            [C, [soft_line_break]]
                                        )},
                                    Refs,
                                    true
                                );

                            _ ->
                                block_to_html(B, Refs, true)
                        end end),
                _pipe@6 = lists:reverse(_pipe@5),
                gleam@string:join(_pipe@6, <<""/utf8>>)
            end,
            Last = case gleam@list:first(R) of
                {ok, Block} ->
                    block_to_html(Block, Refs, true);

                {error, _} ->
                    <<""/utf8>>
            end,
            <<<<<<"<li>"/utf8, Rest/binary>>/binary, Last/binary>>/binary,
                "</li>\n"/utf8>>
    end.