-module(gleam@dynamic).
-compile(no_auto_import).

-export([from/1, unsafe_coerce/1, bit_string/1, string/1, int/1, float/1, atom/1, bool/1, thunk/1, list/1, typed_list/2, option/2, field/2, element/2, tuple2/1, typed_tuple2/3, map/1, any/2]).

from(A) ->
    gleam_stdlib:identity(A).

unsafe_coerce(A) ->
    gleam_stdlib:identity(A).

bit_string(A) ->
    gleam_stdlib:decode_bit_string(A).

string(From) ->
    gleam@result:then(
        gleam_stdlib:decode_bit_string(From),
        fun(Raw) -> case gleam@bit_string:to_string(Raw) of
                {ok, String} ->
                    {ok, String};

                {error, nil} ->
                    {error, <<"Expected a string, got a bit_string"/utf8>>}
            end end
    ).

int(A) ->
    gleam_stdlib:decode_int(A).

float(A) ->
    gleam_stdlib:decode_float(A).

atom(A) ->
    gleam_stdlib:decode_atom(A).

bool(A) ->
    gleam_stdlib:decode_bool(A).

thunk(A) ->
    gleam_stdlib:decode_thunk(A).

list(A) ->
    gleam_stdlib:decode_list(A).

typed_list(Dynamic, DecoderType) ->
    gleam@result:then(
        gleam_stdlib:decode_list(Dynamic),
        fun(GleamCaptureVariable) ->
            gleam@list:try_map(GleamCaptureVariable, DecoderType)
        end
    ).

option(Dynamic, Decoder) ->
    {ok, Null} = gleam@atom:from_string(<<"null"/utf8>>),
    case {gleam_stdlib:decode_atom(Dynamic), Decoder(Dynamic)} of
        {{ok, Atom}, _} when Atom =:= Null ->
            {ok, none};

        {_, {ok, Result}} ->
            {ok, {some, Result}};

        {_, {error, Msg}} ->
            {error, Msg}
    end.

field(A, B) ->
    gleam_stdlib:decode_field(A, B).

element(A, B) ->
    gleam_stdlib:decode_element(A, B).

tuple2(A) ->
    gleam_stdlib:decode_tuple2(A).

typed_tuple2(Tup, DecodeFirst, DecodeSecond) ->
    case gleam_stdlib:decode_tuple2(Tup) of
        {error, GleamTryError} -> {error, GleamTryError};
        {ok, {First, Second}} ->
            case DecodeFirst(First) of
                {error, GleamTryError@1} -> {error, GleamTryError@1};
                {ok, A} ->
                    case DecodeSecond(Second) of
                        {error, GleamTryError@2} -> {error, GleamTryError@2};
                        {ok, B} ->
                            {ok, {A, B}}
                    end
            end
    end.

map(A) ->
    gleam_stdlib:decode_map(A).

any(Data, Decoders) ->
    gleam@result:map_error(
        gleam@list:find_map(Decoders, fun(Decoder) -> Decoder(Data) end),
        fun(_) -> <<"Unexpected value"/utf8>> end
    ).