-module(oaspec@internal@openapi@external_loader_planner).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/oaspec/internal/openapi/external_loader_planner.gleam").
-export([extract_external_component_ref/1, find_external_parameter/3, find_external_request_body/3, find_external_response/3, find_external_path_item/3, check_nested_local_collision/3, check_nested_cross_file_collision/3, check_local_collision/4, check_cross_file_collision/3, extract_external_ref/1, local_schema_names/1, local_schema_name_from_ref/1, find_schema_follow_alias/3, find_external_schema/3, base_dir_of/1]).

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

?MODULEDOC(false).

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 59).
?DOC(false).
-spec try_component_prefix(binary(), binary(), list(binary())) -> gleam@option:option({binary(),
    binary(),
    binary()}).
try_component_prefix(File_path, Fragment, Prefixes) ->
    case Prefixes of
        [] ->
            none;

        [Prefix | Rest] ->
            case gleam_stdlib:string_starts_with(Fragment, Prefix) of
                true ->
                    Name = gleam@string:replace(Fragment, Prefix, <<""/utf8>>),
                    case {gleam_stdlib:contains_string(Name, <<"/"/utf8>>),
                        Name} of
                        {false, <<""/utf8>>} ->
                            none;

                        {false, _} ->
                            {some, {File_path, Prefix, Name}};

                        {true, _} ->
                            none
                    end;

                false ->
                    try_component_prefix(File_path, Fragment, Rest)
            end
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 40).
?DOC(false).
-spec extract_external_component_ref(binary()) -> gleam@option:option({binary(),
    binary(),
    binary()}).
extract_external_component_ref(Ref_str) ->
    Is_relative = gleam_stdlib:string_starts_with(Ref_str, <<"./"/utf8>>) orelse gleam_stdlib:string_starts_with(
        Ref_str,
        <<"../"/utf8>>
    ),
    gleam@bool:guard(
        not Is_relative,
        none,
        fun() -> case gleam@string:split_once(Ref_str, <<"#"/utf8>>) of
                {ok, {File_path, Fragment}} ->
                    try_component_prefix(
                        File_path,
                        Fragment,
                        [<<"/components/parameters/"/utf8>>,
                            <<"/components/requestBodies/"/utf8>>,
                            <<"/components/responses/"/utf8>>,
                            <<"/components/pathItems/"/utf8>>]
                    );

                _ ->
                    none
            end end
    ).

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 82).
?DOC(false).
-spec find_external_parameter(
    oaspec@internal@openapi@spec:open_api_spec(oaspec@internal@openapi@spec:unresolved()),
    binary(),
    binary()
) -> {ok,
        oaspec@internal@openapi@spec:parameter(oaspec@internal@openapi@spec:unresolved())} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
find_external_parameter(Loaded, Name, Source_path) ->
    case erlang:element(5, Loaded) of
        {some, Components} ->
            case gleam_stdlib:map_get(erlang:element(3, Components), Name) of
                {ok, {value, P}} ->
                    {ok, P};

                {ok, {ref, _}} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<<<"External parameter '"/utf8, Name/binary>>/binary,
                                        "' in '"/utf8>>/binary,
                                    Source_path/binary>>/binary,
                                "' is itself a $ref; chained external refs are not supported."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Inline the parameter in the external file or flatten the ref chain."/utf8>>}
                        )};

                {error, nil} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<"External file '"/utf8, Source_path/binary>>/binary,
                                    "' has no components.parameters."/utf8>>/binary,
                                Name/binary>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Verify the ref path and that the referenced file defines the parameter."/utf8>>}
                        )}
            end;

        none ->
            {error,
                oaspec@openapi@diagnostic:validation(
                    Source_path,
                    <<<<"External file '"/utf8, Source_path/binary>>/binary,
                        "' has no components block."/utf8>>,
                    severity_error,
                    target_both,
                    {some,
                        <<"Add a components.parameters section to the referenced file."/utf8>>}
                )}
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 133).
?DOC(false).
-spec find_external_request_body(
    oaspec@internal@openapi@spec:open_api_spec(oaspec@internal@openapi@spec:unresolved()),
    binary(),
    binary()
) -> {ok,
        oaspec@internal@openapi@spec:request_body(oaspec@internal@openapi@spec:unresolved())} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
find_external_request_body(Loaded, Name, Source_path) ->
    case erlang:element(5, Loaded) of
        {some, Components} ->
            case gleam_stdlib:map_get(erlang:element(4, Components), Name) of
                {ok, {value, Rb}} ->
                    {ok, Rb};

                {ok, {ref, _}} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<<<"External request body '"/utf8,
                                            Name/binary>>/binary,
                                        "' in '"/utf8>>/binary,
                                    Source_path/binary>>/binary,
                                "' is itself a $ref; chained external refs are not supported."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Inline the request body in the external file or flatten the ref chain."/utf8>>}
                        )};

                {error, nil} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<"External file '"/utf8, Source_path/binary>>/binary,
                                    "' has no components.requestBodies."/utf8>>/binary,
                                Name/binary>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Verify the ref path and that the referenced file defines the request body."/utf8>>}
                        )}
            end;

        none ->
            {error,
                oaspec@openapi@diagnostic:validation(
                    Source_path,
                    <<<<"External file '"/utf8, Source_path/binary>>/binary,
                        "' has no components block."/utf8>>,
                    severity_error,
                    target_both,
                    {some,
                        <<"Add a components.requestBodies section to the referenced file."/utf8>>}
                )}
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 184).
?DOC(false).
-spec find_external_response(
    oaspec@internal@openapi@spec:open_api_spec(oaspec@internal@openapi@spec:unresolved()),
    binary(),
    binary()
) -> {ok,
        oaspec@internal@openapi@spec:response(oaspec@internal@openapi@spec:unresolved())} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
find_external_response(Loaded, Name, Source_path) ->
    case erlang:element(5, Loaded) of
        {some, Components} ->
            case gleam_stdlib:map_get(erlang:element(5, Components), Name) of
                {ok, {value, R}} ->
                    {ok, R};

                {ok, {ref, _}} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<<<"External response '"/utf8, Name/binary>>/binary,
                                        "' in '"/utf8>>/binary,
                                    Source_path/binary>>/binary,
                                "' is itself a $ref; chained external refs are not supported."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Inline the response in the external file or flatten the ref chain."/utf8>>}
                        )};

                {error, nil} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<"External file '"/utf8, Source_path/binary>>/binary,
                                    "' has no components.responses."/utf8>>/binary,
                                Name/binary>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Verify the ref path and that the referenced file defines the response."/utf8>>}
                        )}
            end;

        none ->
            {error,
                oaspec@openapi@diagnostic:validation(
                    Source_path,
                    <<<<"External file '"/utf8, Source_path/binary>>/binary,
                        "' has no components block."/utf8>>,
                    severity_error,
                    target_both,
                    {some,
                        <<"Add a components.responses section to the referenced file."/utf8>>}
                )}
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 233).
?DOC(false).
-spec find_external_path_item(
    oaspec@internal@openapi@spec:open_api_spec(oaspec@internal@openapi@spec:unresolved()),
    binary(),
    binary()
) -> {ok,
        oaspec@internal@openapi@spec:path_item(oaspec@internal@openapi@spec:unresolved())} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
find_external_path_item(Loaded, Name, Source_path) ->
    case erlang:element(5, Loaded) of
        {some, Components} ->
            case gleam_stdlib:map_get(erlang:element(7, Components), Name) of
                {ok, {value, Pi}} ->
                    {ok, Pi};

                {ok, {ref, _}} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<<<"External path item '"/utf8, Name/binary>>/binary,
                                        "' in '"/utf8>>/binary,
                                    Source_path/binary>>/binary,
                                "' is itself a $ref; chained external refs are not supported."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Inline the path item in the external file or flatten the ref chain."/utf8>>}
                        )};

                {error, nil} ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<"External file '"/utf8, Source_path/binary>>/binary,
                                    "' has no components.pathItems."/utf8>>/binary,
                                Name/binary>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Verify the ref path and that the referenced file defines the path item."/utf8>>}
                        )}
            end;

        none ->
            {error,
                oaspec@openapi@diagnostic:validation(
                    Source_path,
                    <<<<"External file '"/utf8, Source_path/binary>>/binary,
                        "' has no components block."/utf8>>,
                    severity_error,
                    target_both,
                    {some,
                        <<"Add a components.pathItems section to the referenced file."/utf8>>}
                )}
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 285).
?DOC(false).
-spec check_nested_local_collision(binary(), binary(), list(binary())) -> {ok,
        nil} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
check_nested_local_collision(Fragment_name, Source_path, Original_local_names) ->
    gleam@bool:guard(
        not gleam@list:contains(Original_local_names, Fragment_name),
        {ok, nil},
        fun() ->
            {error,
                oaspec@openapi@diagnostic:validation(
                    Source_path,
                    <<<<<<<<"Nested property $ref imports schema '"/utf8,
                                    Fragment_name/binary>>/binary,
                                "' from '"/utf8>>/binary,
                            Source_path/binary>>/binary,
                        "', but a local schema with the same name is already defined."/utf8>>,
                    severity_error,
                    target_both,
                    {some,
                        <<"Rename one of the colliding schemas, or point the external ref at a file whose fragment name is unique."/utf8>>}
                )}
        end
    ).

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 312).
?DOC(false).
-spec check_nested_cross_file_collision(
    binary(),
    binary(),
    gleam@dict:dict(binary(), {binary(),
        oaspec@internal@openapi@schema:schema_ref()})
) -> {ok, nil} | {error, oaspec@openapi@diagnostic:diagnostic()}.
check_nested_cross_file_collision(Fragment_name, Resolved_path, Imports) ->
    case gleam_stdlib:map_get(Imports, Fragment_name) of
        {error, _} ->
            {ok, nil};

        {ok, {Prev_path, _}} ->
            case Prev_path =:= Resolved_path of
                true ->
                    {ok, nil};

                false ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Resolved_path,
                            <<<<<<<<<<<<"Nested property $ref imports schema '"/utf8,
                                                    Fragment_name/binary>>/binary,
                                                "' from '"/utf8>>/binary,
                                            Resolved_path/binary>>/binary,
                                        "', but the same name was already imported from '"/utf8>>/binary,
                                    Prev_path/binary>>/binary,
                                "'."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Rename one of the schemas in the source files so imports do not collide."/utf8>>}
                        )}
            end
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 348).
?DOC(false).
-spec check_local_collision(binary(), binary(), binary(), list(binary())) -> {ok,
        nil} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
check_local_collision(
    Entry_name,
    Fragment_name,
    Source_path,
    Original_local_names
) ->
    gleam@bool:guard(
        Entry_name =:= Fragment_name,
        {ok, nil},
        fun() ->
            gleam@bool:guard(
                not gleam@list:contains(Original_local_names, Fragment_name),
                {ok, nil},
                fun() ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<<<"External $ref imports schema '"/utf8,
                                            Fragment_name/binary>>/binary,
                                        "' from '"/utf8>>/binary,
                                    Source_path/binary>>/binary,
                                "', but a local schema with the same name is already defined."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Rename one of the colliding schemas, or point the external ref at a file whose fragment name is unique."/utf8>>}
                        )}
                end
            )
        end
    ).

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 377).
?DOC(false).
-spec check_cross_file_collision(
    binary(),
    binary(),
    gleam@dict:dict(binary(), binary())
) -> {ok, nil} | {error, oaspec@openapi@diagnostic:diagnostic()}.
check_cross_file_collision(Fragment_name, Resolved_path, Imported) ->
    case gleam_stdlib:map_get(Imported, Fragment_name) of
        {error, _} ->
            {ok, nil};

        {ok, Prev_path} ->
            case Prev_path =:= Resolved_path of
                true ->
                    {ok, nil};

                false ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Resolved_path,
                            <<<<<<<<<<<<"External $ref imports schema '"/utf8,
                                                    Fragment_name/binary>>/binary,
                                                "' from '"/utf8>>/binary,
                                            Resolved_path/binary>>/binary,
                                        "', but the same name was already imported from '"/utf8>>/binary,
                                    Prev_path/binary>>/binary,
                                "'."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Rename one of the schemas in the source files so imports do not collide."/utf8>>}
                        )}
            end
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 411).
?DOC(false).
-spec extract_external_ref(oaspec@internal@openapi@schema:schema_ref()) -> gleam@option:option({binary(),
    binary()}).
extract_external_ref(Schema_ref) ->
    case Schema_ref of
        {reference, Ref, _} ->
            case gleam_stdlib:string_starts_with(Ref, <<"./"/utf8>>) orelse gleam_stdlib:string_starts_with(
                Ref,
                <<"../"/utf8>>
            ) of
                true ->
                    case gleam@string:split_once(Ref, <<"#"/utf8>>) of
                        {ok, {File_path, Fragment}} ->
                            case gleam_stdlib:string_starts_with(
                                Fragment,
                                <<"/components/schemas/"/utf8>>
                            ) of
                                true ->
                                    Name = gleam@string:replace(
                                        Fragment,
                                        <<"/components/schemas/"/utf8>>,
                                        <<""/utf8>>
                                    ),
                                    case {gleam_stdlib:contains_string(
                                            Name,
                                            <<"/"/utf8>>
                                        ),
                                        Name} of
                                        {false, <<""/utf8>>} ->
                                            none;

                                        {false, _} ->
                                            {some, {File_path, Name}};

                                        {true, _} ->
                                            none
                                    end;

                                false ->
                                    none
                            end;

                        _ ->
                            none
                    end;

                false ->
                    none
            end;

        _ ->
            none
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 28).
?DOC(false).
-spec local_schema_names(
    list({binary(), oaspec@internal@openapi@schema:schema_ref()})
) -> list(binary()).
local_schema_names(Entries) ->
    gleam@list:filter_map(
        Entries,
        fun(Entry) -> case extract_external_ref(erlang:element(2, Entry)) of
                {some, _} ->
                    {error, nil};

                none ->
                    {ok, erlang:element(1, Entry)}
            end end
    ).

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 530).
?DOC(false).
-spec local_schema_name_from_ref(binary()) -> gleam@option:option(binary()).
local_schema_name_from_ref(Ref) ->
    Prefix = <<"#/components/schemas/"/utf8>>,
    case gleam_stdlib:string_starts_with(Ref, Prefix) of
        true ->
            Name = gleam@string:replace(Ref, Prefix, <<""/utf8>>),
            case {gleam_stdlib:contains_string(Name, <<"/"/utf8>>), Name} of
                {false, <<""/utf8>>} ->
                    none;

                {false, _} ->
                    {some, Name};

                {true, _} ->
                    none
            end;

        false ->
            none
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 467).
?DOC(false).
-spec find_schema_follow_alias(
    oaspec@internal@openapi@spec:components(oaspec@internal@openapi@spec:unresolved()),
    binary(),
    binary()
) -> {ok, oaspec@internal@openapi@schema:schema_ref()} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
find_schema_follow_alias(Components, Name, Source_path) ->
    case gleam_stdlib:map_get(erlang:element(2, Components), Name) of
        {ok, {inline, _} = S} ->
            {ok, S};

        {ok, {reference, Ref, _}} ->
            case local_schema_name_from_ref(Ref) of
                {some, Aliased} ->
                    case gleam_stdlib:map_get(
                        erlang:element(2, Components),
                        Aliased
                    ) of
                        {ok, {inline, _} = S@1} ->
                            {ok, S@1};

                        _ ->
                            {error,
                                oaspec@openapi@diagnostic:validation(
                                    Source_path,
                                    <<<<<<<<<<<<"External schema '"/utf8,
                                                            Name/binary>>/binary,
                                                        "' in '"/utf8>>/binary,
                                                    Source_path/binary>>/binary,
                                                "' aliases '"/utf8>>/binary,
                                            Aliased/binary>>/binary,
                                        "', but the target is itself a $ref or missing; only a single level of aliasing inside the same file is supported."/utf8>>,
                                    severity_error,
                                    target_both,
                                    {some,
                                        <<"Flatten the alias chain in the external file so the target resolves to an inline schema."/utf8>>}
                                )}
                    end;

                none ->
                    {error,
                        oaspec@openapi@diagnostic:validation(
                            Source_path,
                            <<<<<<<<"External schema '"/utf8, Name/binary>>/binary,
                                        "' in '"/utf8>>/binary,
                                    Source_path/binary>>/binary,
                                "' is itself a $ref pointing outside this file; chained external refs are not supported yet."/utf8>>,
                            severity_error,
                            target_both,
                            {some,
                                <<"Inline the external schema or flatten the ref to live inside the same file."/utf8>>}
                        )}
            end;

        {error, nil} ->
            {error,
                oaspec@openapi@diagnostic:validation(
                    Source_path,
                    <<<<<<"External file '"/utf8, Source_path/binary>>/binary,
                            "' has no components.schemas."/utf8>>/binary,
                        Name/binary>>,
                    severity_error,
                    target_both,
                    {some,
                        <<"Verify the ref path and that the referenced file defines the schema."/utf8>>}
                )}
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 442).
?DOC(false).
-spec find_external_schema(
    oaspec@internal@openapi@spec:open_api_spec(oaspec@internal@openapi@spec:unresolved()),
    binary(),
    binary()
) -> {ok, oaspec@internal@openapi@schema:schema_ref()} |
    {error, oaspec@openapi@diagnostic:diagnostic()}.
find_external_schema(Loaded, Name, Source_path) ->
    case erlang:element(5, Loaded) of
        {some, Components} ->
            find_schema_follow_alias(Components, Name, Source_path);

        none ->
            {error,
                oaspec@openapi@diagnostic:validation(
                    Source_path,
                    <<<<"External file '"/utf8, Source_path/binary>>/binary,
                        "' has no components block."/utf8>>,
                    severity_error,
                    target_both,
                    {some,
                        <<"Add a components.schemas section to the referenced file or inline the schema."/utf8>>}
                )}
    end.

-file("src/oaspec/internal/openapi/external_loader_planner.gleam", 549).
?DOC(false).
-spec base_dir_of(binary()) -> gleam@option:option(binary()).
base_dir_of(Path) ->
    case filepath:directory_name(Path) of
        <<""/utf8>> ->
            {some, <<"."/utf8>>};

        Dir ->
            {some, Dir}
    end.