-module(glevatar).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([new/1, set_size/2, set_default_image/2, set_rating/2, to_uri/1, to_string/1]).
-export_type([default_image/0, image_rating/0]).

-type default_image() :: not_found |
    mystery_person |
    identicon |
    monster_id |
    wavatar |
    retro |
    robohash |
    blank |
    {custom_image, binary()}.

-type image_rating() :: general | parental | restricted | adult.

-spec new(binary()) -> {binary(), gleam@dict:dict(binary(), binary())}.
new(Email) ->
    Hash = begin
        _pipe = Email,
        _pipe@1 = gleam_stdlib:identity(_pipe),
        _pipe@2 = sha2_ffi:hash(_pipe@1, sha256),
        sha2_ffi:encode_hex(_pipe@2)
    end,
    {Hash, gleam@dict:new()}.

-spec set_size({binary(), gleam@dict:dict(binary(), binary())}, integer()) -> {binary(),
    gleam@dict:dict(binary(), binary())}.
set_size(Builder, Size) ->
    {Hash, Options} = Builder,
    {Hash, gleam@dict:insert(Options, <<"s"/utf8>>, gleam@int:to_string(Size))}.

-spec set_default_image(
    {binary(), gleam@dict:dict(binary(), binary())},
    default_image()
) -> {binary(), gleam@dict:dict(binary(), binary())}.
set_default_image(Builder, Default) ->
    {Hash, Options} = Builder,
    Value = case Default of
        not_found ->
            <<"404"/utf8>>;

        mystery_person ->
            <<"mp"/utf8>>;

        identicon ->
            <<"identicon"/utf8>>;

        monster_id ->
            <<"monsterid"/utf8>>;

        wavatar ->
            <<"wavatar"/utf8>>;

        retro ->
            <<"retro"/utf8>>;

        robohash ->
            <<"robohash"/utf8>>;

        blank ->
            <<"blank"/utf8>>;

        {custom_image, Url} ->
            Url
    end,
    {Hash, gleam@dict:insert(Options, <<"d"/utf8>>, Value)}.

-spec set_rating(
    {binary(), gleam@dict:dict(binary(), binary())},
    image_rating()
) -> {binary(), gleam@dict:dict(binary(), binary())}.
set_rating(Builder, Rating) ->
    {Hash, Options} = Builder,
    Value = case Rating of
        general ->
            <<"g"/utf8>>;

        parental ->
            <<"pg"/utf8>>;

        restricted ->
            <<"r"/utf8>>;

        adult ->
            <<"x"/utf8>>
    end,
    {Hash, gleam@dict:insert(Options, <<"r"/utf8>>, Value)}.

-spec to_uri({binary(), gleam@dict:dict(binary(), binary())}) -> gleam@uri:uri().
to_uri(Builder) ->
    {Hash, Options} = Builder,
    Path = <<"/avatar/"/utf8, Hash/binary>>,
    Query = begin
        _pipe = Options,
        _pipe@1 = maps:to_list(_pipe),
        gleam@uri:query_to_string(_pipe@1)
    end,
    {uri,
        {some, <<"https"/utf8>>},
        none,
        {some, <<"gravatar.com"/utf8>>},
        none,
        Path,
        {some, Query},
        none}.

-spec to_string({binary(), gleam@dict:dict(binary(), binary())}) -> binary().
to_string(Builder) ->
    _pipe = Builder,
    _pipe@1 = to_uri(_pipe),
    gleam@uri:to_string(_pipe@1).