-module(libero@cli).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/libero/cli.gleam").
-export([parse_args/1, parse_command/0]).
-export_type([database/0, command/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.

?MODULEDOC(
    " CLI command router for the Libero framework.\n"
    "\n"
    " Usage: gleam run -m libero -- <command> [args]\n"
    " Commands: new, add, gen, build\n"
).

-type database() :: postgres | sqlite.

-type command() :: {new, binary(), gleam@option:option(database())} |
    {add, binary(), binary()} |
    gen |
    build |
    unknown.

-file("src/libero/cli.gleam", 94).
-spec parse_database(binary()) -> {ok, database()} | {error, nil}.
parse_database(Value) ->
    case Value of
        <<"pg"/utf8>> ->
            {ok, postgres};

        <<"sqlite"/utf8>> ->
            {ok, sqlite};

        _ ->
            {error, nil}
    end.

-file("src/libero/cli.gleam", 30).
?DOC(
    " Parse a list of argument strings into a Command.\n"
    " Separated from parse_command so tests can call it without argv.\n"
).
-spec parse_args(list(binary())) -> command().
parse_args(Args) ->
    case Args of
        [<<"new"/utf8>>, Name, <<"--database"/utf8>>, Db | _] ->
            case parse_database(Db) of
                {ok, Database} ->
                    {new, Name, {some, Database}};

                {error, nil} ->
                    gleam_stdlib:println_error(
                        <<<<"error: Invalid database: `"/utf8, Db/binary>>/binary,
                            "`
  \x{2502}
  \x{2502} --database must be \"pg\" or \"sqlite\"
  \x{2502}
  hint: gleam run -m libero -- new my_app --database pg"/utf8>>
                    ),
                    unknown
            end;

        [<<"new"/utf8>>, _, <<"--database"/utf8>>] ->
            gleam_stdlib:println_error(
                <<"error: Missing database value
  \x{2502}
  \x{2502} --database requires a value
  \x{2502}
  hint: gleam run -m libero -- new my_app --database pg
        gleam run -m libero -- new my_app --database sqlite"/utf8>>
            ),
            unknown;

        [<<"new"/utf8>>, Name@1 | _] ->
            {new, Name@1, none};

        [<<"add"/utf8>>, Name@2, <<"--target"/utf8>>, Target | _] ->
            case Target of
                <<"javascript"/utf8>> ->
                    {add, Name@2, Target};

                <<"erlang"/utf8>> ->
                    {add, Name@2, Target};

                _ ->
                    gleam_stdlib:println_error(
                        <<<<<<<<"error: Invalid target: `"/utf8, Target/binary>>/binary,
                                    "`
  \x{2502}
  \x{2502} --target must be \"javascript\" or \"erlang\"
  \x{2502}
  hint: gleam run -m libero -- add "/utf8>>/binary,
                                Name@2/binary>>/binary,
                            " --target javascript"/utf8>>
                    ),
                    unknown
            end;

        [<<"add"/utf8>>, _ | _] ->
            gleam_stdlib:println_error(
                <<"error: Missing --target flag
  \x{2502}
  \x{2502} The add command requires a target
  \x{2502}
  hint: gleam run -m libero -- add <name> --target javascript"/utf8>>
            ),
            unknown;

        [<<"gen"/utf8>> | _] ->
            gen;

        [<<"build"/utf8>> | _] ->
            build;

        [<<"new"/utf8>>] ->
            gleam_stdlib:println_error(
                <<"error: Missing project name
  \x{2502}
  \x{2502} The new command requires a project name
  \x{2502}
  hint: gleam run -m libero -- new my_app"/utf8>>
            ),
            unknown;

        _ ->
            unknown
    end.

-file("src/libero/cli.gleam", 24).
?DOC(" Parse CLI arguments into a Command.\n").
-spec parse_command() -> command().
parse_command() ->
    parse_args(erlang:element(4, argv:load())).