-module(gleeam_code@auth).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/gleeam_code/auth.gleam").
-export([run/3, stdin_read_line/1]).

-file("src/gleeam_code/auth.gleam", 22).
-spec check_env_var(
    fun((binary()) -> nil),
    fun((binary()) -> {ok, binary()} | {error, nil})
) -> {ok, boolean()} | {error, binary()}.
check_env_var(Print, Read_line) ->
    case envoy_ffi:get(<<"LEETCODE_SESSION"/utf8>>) of
        {ok, Value} when Value =/= <<""/utf8>> ->
            Print(
                <<"LEETCODE_SESSION environment variable is already set."/utf8>>
            ),
            Print(
                <<"glc uses the session file (~/.gleeam/session) with higher priority."/utf8>>
            ),
            case Read_line(<<"Save a separate session anyway? [y/N]: "/utf8>>) of
                {ok, Input} ->
                    case begin
                        _pipe = gleam@string:trim(Input),
                        string:lowercase(_pipe)
                    end of
                        <<"y"/utf8>> ->
                            {ok, true};

                        <<"yes"/utf8>> ->
                            {ok, true};

                        _ ->
                            {ok, false}
                    end;

                {error, _} ->
                    {error, <<"Failed to read input"/utf8>>}
            end;

        _ ->
            {ok, true}
    end.

-file("src/gleeam_code/auth.gleam", 45).
-spec check_existing_file(
    fun((binary()) -> nil),
    fun((binary()) -> {ok, binary()} | {error, nil})
) -> {ok, boolean()} | {error, binary()}.
check_existing_file(Print, Read_line) ->
    case gleeam_code@internal@config:session_file_exists() of
        false ->
            {ok, true};

        true ->
            Print(<<"Session file already exists (~/.gleeam/session)."/utf8>>),
            case Read_line(<<"Overwrite? [y/N]: "/utf8>>) of
                {ok, Input} ->
                    case begin
                        _pipe = gleam@string:trim(Input),
                        string:lowercase(_pipe)
                    end of
                        <<"y"/utf8>> ->
                            {ok, true};

                        <<"yes"/utf8>> ->
                            {ok, true};

                        _ ->
                            {ok, false}
                    end;

                {error, _} ->
                    {error, <<"Failed to read input"/utf8>>}
            end
    end.

-file("src/gleeam_code/auth.gleam", 65).
-spec prompt_and_save(
    fun((binary()) -> nil),
    fun((binary()) -> {ok, binary()} | {error, nil})
) -> {ok, nil} | {error, binary()}.
prompt_and_save(Print, Read_line) ->
    case Read_line(<<"Paste your LEETCODE_SESSION cookie: "/utf8>>) of
        {ok, Input} ->
            Cookie = gleam@string:trim(Input),
            case Cookie of
                <<""/utf8>> ->
                    {error, <<"Empty input. Session not saved."/utf8>>};

                _ ->
                    case gleeam_code@internal@config:save_session(Cookie) of
                        {ok, _} ->
                            Print(<<"Session saved to ~/.gleeam/session"/utf8>>),
                            {ok, nil};

                        {error, Err} ->
                            {error, Err}
                    end
            end;

        {error, _} ->
            {error, <<"Failed to read input"/utf8>>}
    end.

-file("src/gleeam_code/auth.gleam", 5).
-spec run(
    binary(),
    fun((binary()) -> nil),
    fun((binary()) -> {ok, binary()} | {error, nil})
) -> {ok, nil} | {error, binary()}.
run(_, Print, Read_line) ->
    case check_env_var(Print, Read_line) of
        {error, Msg} ->
            {error, Msg};

        {ok, false} ->
            {ok, nil};

        {ok, true} ->
            case check_existing_file(Print, Read_line) of
                {error, Msg@1} ->
                    {error, Msg@1};

                {ok, false} ->
                    {ok, nil};

                {ok, true} ->
                    prompt_and_save(Print, Read_line)
            end
    end.

-file("src/gleeam_code/auth.gleam", 89).
-spec stdin_read_line(binary()) -> {ok, binary()} | {error, nil}.
stdin_read_line(Prompt) ->
    gleeam_code_io_ffi:get_line(Prompt).