-module(tale@renderer).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/tale/renderer.gleam").
-export([load_partials/1, render_jobs/4]).
-export_type([pagination_info/0, tag_context/0, render_job/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-type pagination_info() :: {pagination_info,
        integer(),
        integer(),
        integer(),
        gleam@option:option(binary()),
        gleam@option:option(binary())}.

-type tag_context() :: {tag_context,
        binary(),
        binary(),
        binary(),
        list(tale@content:page_data())}.

-type render_job() :: {render_job,
        tale@content:page_data(),
        list(tale@content:page_data()),
        gleam@option:option(pagination_info()),
        gleam@option:option(tag_context()),
        list(tag_context())}.

-file("src/tale/renderer.gleam", 58).
?DOC(
    " Partials List. This is a strict list for now.\n"
    " TODO: Make partials and generally layouts more flexible.\n"
).
-spec handles_partial_specs() -> list({binary(), binary()}).
handles_partial_specs() ->
    [{<<"_partials/head"/utf8>>, <<"head.html"/utf8>>},
        {<<"_partials/head_css"/utf8>>, <<"head/css.html"/utf8>>},
        {<<"_partials/head_js"/utf8>>, <<"head/js.html"/utf8>>},
        {<<"_partials/menu"/utf8>>, <<"menu.html"/utf8>>},
        {<<"_partials/header"/utf8>>, <<"header.html"/utf8>>},
        {<<"_partials/post_card"/utf8>>, <<"post_card.html"/utf8>>},
        {<<"_partials/footer"/utf8>>, <<"footer.html"/utf8>>}].

-file("src/tale/renderer.gleam", 88).
?DOC(" Load handle templates\n").
-spec load_handles_template(binary()) -> {ok, handles:template()} |
    {error, binary()}.
load_handles_template(Path) ->
    gleam@result:'try'(
        begin
            _pipe = simplifile:read(Path),
            gleam@result:map_error(
                _pipe,
                fun(Err) ->
                    <<<<<<"Unable to read template "/utf8, Path/binary>>/binary,
                            ": "/utf8>>/binary,
                        (simplifile:describe_error(Err))/binary>>
                end
            )
        end,
        fun(Template_source) -> _pipe@1 = handles:prepare(Template_source),
            gleam@result:map_error(
                _pipe@1,
                fun(Err@1) ->
                    <<<<<<"Template syntax error in "/utf8, Path/binary>>/binary,
                            ": "/utf8>>/binary,
                        (tale@util:describe_tokenizer_error(Err@1))/binary>>
                end
            ) end
    ).

-file("src/tale/renderer.gleam", 71).
?DOC(" Load templates partials list\n").
-spec load_partial_list(
    list({binary(), binary()}),
    binary(),
    list({binary(), handles:template()})
) -> {ok, list({binary(), handles:template()})} | {error, binary()}.
load_partial_list(Specs, Partials_dir, Acc) ->
    case Specs of
        [] ->
            {ok, lists:reverse(Acc)};

        [{Name, File} | Rest] ->
            gleam@result:'try'(
                load_handles_template(
                    <<<<Partials_dir/binary, "/"/utf8>>/binary, File/binary>>
                ),
                fun(Template) ->
                    load_partial_list(
                        Rest,
                        Partials_dir,
                        [{Name, Template} | Acc]
                    )
                end
            )
    end.

-file("src/tale/renderer.gleam", 50).
?DOC(" Loading template partials\n").
-spec load_partials(binary()) -> {ok, list({binary(), handles:template()})} |
    {error, binary()}.
load_partials(Partials_dir) ->
    load_partial_list(handles_partial_specs(), Partials_dir, []).

-file("src/tale/renderer.gleam", 233).
?DOC(" Finds the current year. Used in default theme footer.\n").
-spec current_year_string() -> binary().
current_year_string() ->
    {Date, _} = begin
        _pipe = gleam@time@timestamp:system_time(),
        gleam@time@timestamp:to_calendar(_pipe, {duration, 0, 0})
    end,
    erlang:integer_to_binary(erlang:element(2, Date)).

-file("src/tale/renderer.gleam", 254).
-spec pagination_context(gleam@option:option(pagination_info())) -> handles@ctx:value().
pagination_context(Info) ->
    case Info of
        none ->
            {dict, []};

        {some, {pagination_info, Current, Total, Per, Previous, Next}} ->
            {dict,
                [{prop, <<"current_page"/utf8>>, {int, Current}},
                    {prop, <<"total_pages"/utf8>>, {int, Total}},
                    {prop, <<"per_page"/utf8>>, {int, Per}},
                    {prop,
                        <<"previous"/utf8>>,
                        {str, gleam@option:unwrap(Previous, <<""/utf8>>)}},
                    {prop,
                        <<"next"/utf8>>,
                        {str, gleam@option:unwrap(Next, <<""/utf8>>)}},
                    {prop,
                        <<"has_previous"/utf8>>,
                        {bool, gleam@option:is_some(Previous)}},
                    {prop,
                        <<"has_next"/utf8>>,
                        {bool, gleam@option:is_some(Next)}},
                    {prop, <<"has_pages"/utf8>>, {bool, Total > 1}}]}
    end.

-file("src/tale/renderer.gleam", 321).
-spec tag_permalink_from_slug(binary()) -> binary().
tag_permalink_from_slug(Slug) ->
    <<<<"/tags/"/utf8, Slug/binary>>/binary, "/"/utf8>>.

-file("src/tale/renderer.gleam", 312).
-spec tag_value(binary()) -> handles@ctx:value().
tag_value(Name) ->
    Slug = tale@util:slugify(Name),
    {dict,
        [{prop, <<"name"/utf8>>, {str, Name}},
            {prop, <<"slug"/utf8>>, {str, Slug}},
            {prop, <<"permalink"/utf8>>, {str, tag_permalink_from_slug(Slug)}}]}.

-file("src/tale/renderer.gleam", 306).
-spec tag_list_context(list(binary())) -> handles@ctx:value().
tag_list_context(Tags) ->
    _pipe = Tags,
    _pipe@1 = gleam@list:map(_pipe, fun tag_value/1),
    {list, _pipe@1}.

-file("src/tale/renderer.gleam", 240).
-spec post_summary_to_ctx(tale@content:page_data()) -> handles@ctx:value().
post_summary_to_ctx(Page) ->
    {dict,
        [{prop,
                <<"title"/utf8>>,
                {str, erlang:element(2, erlang:element(7, Page))}},
            {prop,
                <<"description"/utf8>>,
                {str, erlang:element(3, erlang:element(7, Page))}},
            {prop,
                <<"date"/utf8>>,
                {str,
                    gleam@option:unwrap(
                        erlang:element(4, erlang:element(7, Page)),
                        <<""/utf8>>
                    )}},
            {prop,
                <<"slug"/utf8>>,
                {str, erlang:element(8, erlang:element(7, Page))}},
            {prop, <<"permalink"/utf8>>, {str, erlang:element(5, Page)}},
            {prop,
                <<"author"/utf8>>,
                {str, erlang:element(7, erlang:element(7, Page))}},
            {prop,
                <<"draft"/utf8>>,
                {bool, erlang:element(5, erlang:element(7, Page))}},
            {prop,
                <<"has_tags"/utf8>>,
                {bool, erlang:element(6, erlang:element(7, Page)) /= []}},
            {prop,
                <<"tags"/utf8>>,
                tag_list_context(erlang:element(6, erlang:element(7, Page)))}]}.

-file("src/tale/renderer.gleam", 226).
-spec posts_context(list(tale@content:page_data())) -> handles@ctx:value().
posts_context(Posts) ->
    _pipe = Posts,
    _pipe@1 = gleam@list:map(_pipe, fun post_summary_to_ctx/1),
    {list, _pipe@1}.

-file("src/tale/renderer.gleam", 277).
-spec current_tag_context(gleam@option:option(tag_context())) -> handles@ctx:value().
current_tag_context(Tag) ->
    case Tag of
        none ->
            {dict, []};

        {some, {tag_context, Name, Slug, Link, Posts}} ->
            {dict,
                [{prop, <<"name"/utf8>>, {str, Name}},
                    {prop, <<"slug"/utf8>>, {str, Slug}},
                    {prop, <<"permalink"/utf8>>, {str, Link}},
                    {prop, <<"count"/utf8>>, {int, erlang:length(Posts)}},
                    {prop, <<"posts"/utf8>>, posts_context(Posts)}]}
    end.

-file("src/tale/renderer.gleam", 291).
-spec tags_context(list(tag_context())) -> handles@ctx:value().
tags_context(Tags) ->
    _pipe = Tags,
    _pipe@1 = gleam@list:map(
        _pipe,
        fun(Tag) ->
            {tag_context, Name, Slug, Link, Posts} = Tag,
            {dict,
                [{prop, <<"name"/utf8>>, {str, Name}},
                    {prop, <<"slug"/utf8>>, {str, Slug}},
                    {prop, <<"permalink"/utf8>>, {str, Link}},
                    {prop, <<"count"/utf8>>, {int, erlang:length(Posts)}},
                    {prop, <<"posts"/utf8>>, posts_context(Posts)}]}
        end
    ),
    {list, _pipe@1}.

-file("src/tale/renderer.gleam", 325).
-spec menu_context(list(tale@config:menu_item())) -> handles@ctx:value().
menu_context(Items) ->
    _pipe = Items,
    _pipe@1 = gleam@list:map(
        _pipe,
        fun(Item) ->
            {menu_item, Label, Url, _} = Item,
            {dict,
                [{prop, <<"label"/utf8>>, {str, Label}},
                    {prop, <<"url"/utf8>>, {str, Url}}]}
        end
    ),
    {list, _pipe@1}.

-file("src/tale/renderer.gleam", 176).
-spec build_page_context(render_job(), tale@config:site_config()) -> handles@ctx:value().
build_page_context(Job, Config) ->
    Metadata = {dict,
        [{prop,
                <<"title"/utf8>>,
                {str,
                    erlang:element(2, erlang:element(7, erlang:element(2, Job)))}},
            {prop,
                <<"description"/utf8>>,
                {str,
                    erlang:element(3, erlang:element(7, erlang:element(2, Job)))}},
            {prop,
                <<"date"/utf8>>,
                {str,
                    gleam@option:unwrap(
                        erlang:element(
                            4,
                            erlang:element(7, erlang:element(2, Job))
                        ),
                        <<""/utf8>>
                    )}},
            {prop,
                <<"slug"/utf8>>,
                {str,
                    erlang:element(8, erlang:element(7, erlang:element(2, Job)))}},
            {prop, <<"site_title"/utf8>>, {str, erlang:element(2, Config)}},
            {prop,
                <<"site_description"/utf8>>,
                {str, erlang:element(4, Config)}},
            {prop, <<"site_author"/utf8>>, {str, erlang:element(5, Config)}},
            {prop, <<"site_base_url"/utf8>>, {str, erlang:element(6, Config)}},
            {prop, <<"site_theme"/utf8>>, {str, erlang:element(3, Config)}},
            {prop,
                <<"site_pagination"/utf8>>,
                {int, gleam@option:unwrap(erlang:element(9, Config), 0)}},
            {prop,
                <<"draft"/utf8>>,
                {bool,
                    erlang:element(5, erlang:element(7, erlang:element(2, Job)))}},
            {prop,
                <<"author"/utf8>>,
                {str,
                    erlang:element(7, erlang:element(7, erlang:element(2, Job)))}},
            {prop,
                <<"tags"/utf8>>,
                tag_list_context(
                    erlang:element(6, erlang:element(7, erlang:element(2, Job)))
                )},
            {prop,
                <<"permalink"/utf8>>,
                {str, erlang:element(5, erlang:element(2, Job))}},
            {prop,
                <<"is_home"/utf8>>,
                {bool,
                    erlang:element(5, erlang:element(2, Job)) =:= <<"/"/utf8>>}},
            {prop,
                <<"has_tags"/utf8>>,
                {bool,
                    erlang:element(6, erlang:element(7, erlang:element(2, Job)))
                    /= []}},
            {prop,
                <<"site_menu"/utf8>>,
                menu_context(erlang:element(10, Config))},
            {prop,
                <<"has_site_menu"/utf8>>,
                {bool, erlang:element(10, Config) /= []}}]},
    Pagination_prop = {prop,
        <<"pagination"/utf8>>,
        pagination_context(erlang:element(4, Job))},
    Tag_prop = {prop,
        <<"current_tag"/utf8>>,
        current_tag_context(erlang:element(5, Job))},
    Body_prop = {prop,
        <<"body"/utf8>>,
        {str, erlang:element(8, erlang:element(2, Job))}},
    Base = [{prop, <<"metadata"/utf8>>, Metadata},
        Body_prop,
        Pagination_prop,
        Tag_prop,
        {prop, <<"site_tags"/utf8>>, tags_context(erlang:element(6, Job))},
        {prop,
            <<"is_home"/utf8>>,
            {bool, erlang:element(5, erlang:element(2, Job)) =:= <<"/"/utf8>>}},
        {prop,
            <<"is_tag_page"/utf8>>,
            {bool, gleam@option:is_some(erlang:element(5, Job))}},
        {prop,
            <<"is_index_page"/utf8>>,
            {bool, gleam@option:is_none(erlang:element(5, Job))}},
        {prop,
            <<"is_subpage"/utf8>>,
            {bool, erlang:element(5, erlang:element(2, Job)) /= <<"/"/utf8>>}},
        {prop,
            <<"has_body"/utf8>>,
            {bool, erlang:element(8, erlang:element(2, Job)) /= <<""/utf8>>}},
        {prop, <<"current_year"/utf8>>, {str, current_year_string()}}],
    case tale@content:is_list_layout(erlang:element(2, Job)) of
        true ->
            {dict,
                [{prop, <<"pages"/utf8>>, posts_context(erlang:element(3, Job))} |
                    Base]};

        false ->
            {dict, Base}
    end.

-file("src/tale/renderer.gleam", 361).
-spec add_slot(handles@ctx:value(), binary()) -> {ok, handles@ctx:value()} |
    {error, binary()}.
add_slot(Context, Slot) ->
    case Context of
        {dict, Props} ->
            {ok, {dict, [{prop, <<"main"/utf8>>, {str, Slot}} | Props]}};

        _ ->
            {error,
                <<"Unable to extend template context for base layout"/utf8>>}
    end.

-file("src/tale/renderer.gleam", 337).
-spec wrap_with_base(
    gleam@string_tree:string_tree(),
    handles@ctx:value(),
    list({binary(), handles:template()}),
    binary()
) -> {ok, gleam@string_tree:string_tree()} | {error, binary()}.
wrap_with_base(Inner, Context, Partials, Layouts_dir) ->
    Base_path = <<Layouts_dir/binary, "/baseof.html"/utf8>>,
    case simplifile_erl:is_file(Base_path) of
        {ok, true} ->
            gleam@result:'try'(
                load_handles_template(Base_path),
                fun(Base_template) ->
                    Slot = unicode:characters_to_binary(Inner),
                    gleam@result:'try'(
                        add_slot(Context, Slot),
                        fun(Extended_context) ->
                            _pipe = handles:run(
                                Base_template,
                                Extended_context,
                                Partials
                            ),
                            gleam@result:map_error(
                                _pipe,
                                fun(Err) ->
                                    <<<<<<"Template runtime error in baseof for slot "/utf8,
                                                Base_path/binary>>/binary,
                                            ": "/utf8>>/binary,
                                        (tale@util:describe_runtime_error(Err))/binary>>
                                end
                            )
                        end
                    )
                end
            );

        _ ->
            {ok, Inner}
    end.

-file("src/tale/renderer.gleam", 133).
-spec render_job(
    render_job(),
    tale@config:site_config(),
    list({binary(), handles:template()}),
    binary()
) -> {ok, binary()} | {error, binary()}.
render_job(Job, Config, Partials, Layouts_dir) ->
    gleam@result:'try'(
        load_handles_template(
            <<<<<<Layouts_dir/binary, "/"/utf8>>/binary,
                    (erlang:element(6, erlang:element(2, Job)))/binary>>/binary,
                ".html"/utf8>>
        ),
        fun(Template) ->
            Context = build_page_context(Job, Config),
            gleam@result:'try'(
                begin
                    _pipe = handles:run(Template, Context, Partials),
                    gleam@result:map_error(
                        _pipe,
                        fun(Err) ->
                            <<<<<<<<<<"Template runtime error in "/utf8,
                                                (erlang:element(
                                                    6,
                                                    erlang:element(2, Job)
                                                ))/binary>>/binary,
                                            " for "/utf8>>/binary,
                                        (erlang:element(
                                            3,
                                            erlang:element(2, Job)
                                        ))/binary>>/binary,
                                    ": "/utf8>>/binary,
                                (tale@util:describe_runtime_error(Err))/binary>>
                        end
                    )
                end,
                fun(Rendered) ->
                    gleam@result:'try'(
                        wrap_with_base(Rendered, Context, Partials, Layouts_dir),
                        fun(Wrapped) ->
                            gleam@result:'try'(
                                tale@paths:ensure_parent_dirs(
                                    erlang:element(4, erlang:element(2, Job))
                                ),
                                fun(_) ->
                                    _pipe@1 = simplifile:write(
                                        erlang:element(
                                            4,
                                            erlang:element(2, Job)
                                        ),
                                        unicode:characters_to_binary(Wrapped)
                                    ),
                                    _pipe@2 = gleam@result:map_error(
                                        _pipe@1,
                                        fun(Err@1) ->
                                            <<<<<<"Unable to write "/utf8,
                                                        (erlang:element(
                                                            4,
                                                            erlang:element(
                                                                2,
                                                                Job
                                                            )
                                                        ))/binary>>/binary,
                                                    ": "/utf8>>/binary,
                                                (simplifile:describe_error(
                                                    Err@1
                                                ))/binary>>
                                        end
                                    ),
                                    gleam@result:map(
                                        _pipe@2,
                                        fun(_) ->
                                            <<"Wrote "/utf8,
                                                (erlang:element(
                                                    4,
                                                    erlang:element(2, Job)
                                                ))/binary>>
                                        end
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("src/tale/renderer.gleam", 117).
-spec render_loop(
    list(render_job()),
    tale@config:site_config(),
    list({binary(), handles:template()}),
    binary(),
    list(binary())
) -> {ok, list(binary())} | {error, binary()}.
render_loop(Jobs, Config, Partials, Layouts_dir, Acc) ->
    case Jobs of
        [] ->
            {ok, lists:reverse(Acc)};

        [Job | Rest] ->
            gleam@result:'try'(
                render_job(Job, Config, Partials, Layouts_dir),
                fun(Message) ->
                    render_loop(
                        Rest,
                        Config,
                        Partials,
                        Layouts_dir,
                        [Message | Acc]
                    )
                end
            )
    end.

-file("src/tale/renderer.gleam", 108).
-spec render_jobs(
    list(render_job()),
    tale@config:site_config(),
    list({binary(), handles:template()}),
    binary()
) -> {ok, list(binary())} | {error, binary()}.
render_jobs(Jobs, Config, Partials, Layouts_dir) ->
    render_loop(Jobs, Config, Partials, Layouts_dir, []).