-module(oaspec@openapi@schema).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/oaspec/openapi/schema.gleam").
-export([default_metadata/0, make_reference/1, get_metadata/1, get_description/1, is_nullable/1, is_deprecated/1]).
-export_type([schema_metadata/0, schema_object/0, schema_ref/0, discriminator/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 schema_metadata() :: {schema_metadata,
        gleam@option:option(binary()),
        boolean(),
        boolean(),
        gleam@option:option(binary()),
        boolean(),
        boolean(),
        gleam@option:option(binary()),
        gleam@option:option(binary())}.

-type schema_object() :: {string_schema,
        schema_metadata(),
        gleam@option:option(binary()),
        list(binary()),
        gleam@option:option(integer()),
        gleam@option:option(integer()),
        gleam@option:option(binary())} |
    {integer_schema,
        schema_metadata(),
        gleam@option:option(binary()),
        gleam@option:option(integer()),
        gleam@option:option(integer()),
        gleam@option:option(integer()),
        gleam@option:option(integer()),
        gleam@option:option(integer())} |
    {number_schema,
        schema_metadata(),
        gleam@option:option(binary()),
        gleam@option:option(float()),
        gleam@option:option(float()),
        gleam@option:option(float()),
        gleam@option:option(float()),
        gleam@option:option(float())} |
    {boolean_schema, schema_metadata()} |
    {array_schema,
        schema_metadata(),
        schema_ref(),
        gleam@option:option(integer()),
        gleam@option:option(integer()),
        boolean()} |
    {object_schema,
        schema_metadata(),
        gleam@dict:dict(binary(), schema_ref()),
        list(binary()),
        gleam@option:option(schema_ref()),
        boolean(),
        gleam@option:option(integer()),
        gleam@option:option(integer())} |
    {all_of_schema, schema_metadata(), list(schema_ref())} |
    {one_of_schema,
        schema_metadata(),
        list(schema_ref()),
        gleam@option:option(discriminator())} |
    {any_of_schema,
        schema_metadata(),
        list(schema_ref()),
        gleam@option:option(discriminator())}.

-type schema_ref() :: {inline, schema_object()} |
    {reference, binary(), binary()}.

-type discriminator() :: {discriminator,
        binary(),
        gleam@dict:dict(binary(), binary())}.

-file("src/oaspec/openapi/schema.gleam", 23).
?DOC(" Create default metadata with no description, not nullable, not deprecated.\n").
-spec default_metadata() -> schema_metadata().
default_metadata() ->
    {schema_metadata, none, false, false, none, false, false, none, none}.

-file("src/oaspec/openapi/schema.gleam", 112).
?DOC(
    " Extract the schema name from a $ref string (last path segment).\n"
    " Example: \"#/components/schemas/User\" -> \"User\"\n"
).
-spec ref_to_schema_name(binary()) -> binary().
ref_to_schema_name(Ref) ->
    case gleam@string:split(Ref, <<"/"/utf8>>) of
        [] ->
            <<"Unknown"/utf8>>;

        Segments ->
            case gleam@list:last(Segments) of
                {ok, Name} ->
                    Name;

                {error, _} ->
                    <<"Unknown"/utf8>>
            end
    end.

-file("src/oaspec/openapi/schema.gleam", 105).
?DOC(" Create a Reference from a $ref string, auto-extracting the name.\n").
-spec make_reference(binary()) -> schema_ref().
make_reference(Ref) ->
    Name = ref_to_schema_name(Ref),
    {reference, Ref, Name}.

-file("src/oaspec/openapi/schema.gleam", 145).
?DOC(" Extract the shared metadata from any schema variant.\n").
-spec get_metadata(schema_object()) -> schema_metadata().
get_metadata(Schema) ->
    case Schema of
        {string_schema, Metadata, _, _, _, _, _} ->
            Metadata;

        {integer_schema, Metadata@1, _, _, _, _, _, _} ->
            Metadata@1;

        {number_schema, Metadata@2, _, _, _, _, _, _} ->
            Metadata@2;

        {boolean_schema, Metadata@3} ->
            Metadata@3;

        {array_schema, Metadata@4, _, _, _, _} ->
            Metadata@4;

        {object_schema, Metadata@5, _, _, _, _, _, _} ->
            Metadata@5;

        {all_of_schema, Metadata@6, _} ->
            Metadata@6;

        {one_of_schema, Metadata@7, _, _} ->
            Metadata@7;

        {any_of_schema, Metadata@8, _, _} ->
            Metadata@8
    end.

-file("src/oaspec/openapi/schema.gleam", 130).
?DOC(" Get the description from any schema object.\n").
-spec get_description(schema_object()) -> gleam@option:option(binary()).
get_description(Schema) ->
    erlang:element(2, get_metadata(Schema)).

-file("src/oaspec/openapi/schema.gleam", 135).
?DOC(" Check if a schema is nullable.\n").
-spec is_nullable(schema_object()) -> boolean().
is_nullable(Schema) ->
    erlang:element(3, get_metadata(Schema)).

-file("src/oaspec/openapi/schema.gleam", 140).
?DOC(" Check if a schema is deprecated.\n").
-spec is_deprecated(schema_object()) -> boolean().
is_deprecated(Schema) ->
    erlang:element(4, get_metadata(Schema)).