-module(validator_test).
-compile(no_auto_import).

-export([invalid_test/0, valid_test/0, error_type_test/0, custom_test/0, and_test/0, and_with_transformation_test/0, all_test/0, compose_and_all_test/0, whole_test/0, int_min_test/0, int_max_test/0, list_is_not_empty_test/0, list_min_length_test/0, list_max_length_test/0, list_all_test/0, option_is_some_test/0, option_optional_test/0, string_not_empty_test/0, string_is_int_test/0, string_is_float_test/0, string_is_email_test/0, string_min_length_test/0, string_max_length_test/0]).

user_validator(User) ->
    validator:keep(
        validator:validate(
            validator:validate(
                validator:build3(fun(A, B, C) -> {valid_user, A, B, C} end),
                erlang:element(2, User),
                validator@option:is_some(<<"Please provide a name"/utf8>>)
            ),
            erlang:element(3, User),
            validator@option:is_some(<<"Please provide an email"/utf8>>)
        ),
        erlang:element(4, User)
    ).

invalid_test() ->
    Invalid = {input_user, none, none, 0},
    Expected = {error,
                {<<"Please provide a name"/utf8>>,
                 [<<"Please provide a name"/utf8>>,
                  <<"Please provide an email"/utf8>>]}},
    gleam@should:equal(user_validator(Invalid), Expected).

valid_test() ->
    ValidInput = {input_user,
                  {some, <<"Sam"/utf8>>},
                  {some, <<"sam@sample.com"/utf8>>},
                  11},
    Valid = {valid_user, <<"Sam"/utf8>>, <<"sam@sample.com"/utf8>>, 11},
    gleam@should:equal(user_validator(ValidInput), {ok, Valid}).

error_type_test() ->
    Validator = fun(Thing) ->
        validator:validate(
            validator:build1(fun(A) -> {thing, A} end),
            erlang:element(2, Thing),
            validator@string:is_not_empty(error_empty)
        )
    end,
    Thing@1 = {thing, <<""/utf8>>},
    Expected = {error, {error_empty, [error_empty]}},
    gleam@should:equal(Validator(Thing@1), Expected).

custom_test() ->
    MustBeOne = fun(Name) -> case Name =:= <<"One"/utf8>> of
            true ->
                {some, Name};

            false ->
                none
        end end,
    Custom = validator:custom(<<"Must be One"/utf8>>, MustBeOne),
    Validator = fun(Thing) ->
        validator:validate(
            validator:build1(fun(A) -> {thing, A} end),
            erlang:element(2, Thing),
            Custom
        )
    end,
    ThingOne = {thing, <<"One"/utf8>>},
    gleam@should:equal(Validator(ThingOne), {ok, {thing, <<"One"/utf8>>}}),
    ThingTwo = {thing, <<"Two"/utf8>>},
    ExpectedError = {error, {<<"Must be One"/utf8>>, [<<"Must be One"/utf8>>]}},
    gleam@should:equal(Validator(ThingTwo), ExpectedError).

and_test() ->
    NameValidator = validator:'and'(
        validator:'and'(
            validator@string:is_not_empty(<<"Empty"/utf8>>),
            validator@string:min_length(<<"More"/utf8>>, 6)
        ),
        validator@string:max_length(<<"Less"/utf8>>, 2)
    ),
    Validator = fun(Thing) ->
        validator:validate(
            validator:build1(fun(A) -> {thing, A} end),
            erlang:element(2, Thing),
            NameValidator
        )
    end,
    Thing@1 = {thing, <<"One"/utf8>>},
    ExpectedError = {error, {<<"More"/utf8>>, [<<"More"/utf8>>]}},
    gleam@should:equal(Validator(Thing@1), ExpectedError).

and_with_transformation_test() ->
    NameValidator = validator:'and'(
        validator:'and'(
            validator:'and'(
                validator@option:is_some(<<"Is null"/utf8>>),
                validator@string:is_not_empty(<<"Empty"/utf8>>)
            ),
            validator@string:min_length(<<"More"/utf8>>, 3)
        ),
        validator@string:max_length(<<"Less"/utf8>>, 8)
    ),
    Validator = fun(Thing) ->
        validator:validate(
            validator:build1(fun(A) -> {thing, A} end),
            erlang:element(2, Thing),
            NameValidator
        )
    end,
    Thing@1 = {input_thing, {some, <<"One Thing"/utf8>>}},
    ExpectedError = {error, {<<"Less"/utf8>>, [<<"Less"/utf8>>]}},
    gleam@should:equal(Validator(Thing@1), ExpectedError).

all_test() ->
    NameValidator = validator:all(
        [validator@string:is_not_empty(<<"Empty"/utf8>>),
         validator@string:min_length(<<">=3"/utf8>>, 3),
         validator@string:min_length(<<">=4"/utf8>>, 4),
         validator@string:min_length(<<">=5"/utf8>>, 5),
         validator@string:max_length(<<"<=10"/utf8>>, 10)]
    ),
    Validator = fun(Thing) ->
        validator:validate(
            validator:build1(fun(A) -> {thing, A} end),
            erlang:element(2, Thing),
            NameValidator
        )
    end,
    Thing@1 = {thing, <<"1"/utf8>>},
    ExpectedError = {error,
                     {<<">=3"/utf8>>,
                      [<<">=3"/utf8>>, <<">=4"/utf8>>, <<">=5"/utf8>>]}},
    gleam@should:equal(Validator(Thing@1), ExpectedError).

compose_and_all_test() ->
    NameValidator = validator:'and'(
        validator@option:is_some(<<"Is null"/utf8>>),
        validator:all(
            [validator@string:is_not_empty(<<"Empty"/utf8>>),
             validator@string:min_length(<<">=3"/utf8>>, 3),
             validator@string:max_length(<<"<=10"/utf8>>, 10)]
        )
    ),
    Validator = fun(Thing) ->
        validator:validate(
            validator:build1(fun(A) -> {thing, A} end),
            erlang:element(2, Thing),
            NameValidator
        )
    end,
    Thing@1 = {input_thing, {some, <<"One Thing after the other"/utf8>>}},
    ExpectedError = {error, {<<"<=10"/utf8>>, [<<"<=10"/utf8>>]}},
    gleam@should:equal(Validator(Thing@1), ExpectedError).

whole_test() ->
    Error = <<"Strength cannot be less than level"/utf8>>,
    WholeValidator = fun(C) ->
        case erlang:element(2, C) > erlang:element(3, C) of
            true ->
                {error, Error};

            false ->
                {ok, C}
        end
    end,
    Validator = fun(C@1) ->
        (validator:whole(WholeValidator))(
            validator:validate(
                validator:validate(
                    validator:build2(fun(A, B) -> {character, A, B} end),
                    erlang:element(2, C@1),
                    validator@int:min(
                        <<"Level must be more that zero"/utf8>>,
                        1
                    )
                ),
                erlang:element(3, C@1),
                validator@int:min(<<"Strength must be more that zero"/utf8>>, 1)
            )
        )
    end,
    Char = {character, 1, 1},
    gleam@should:equal(Validator(Char), {ok, Char}),
    Char2 = {character, 2, 1},
    gleam@should:equal(Validator(Char2), {error, {Error, [Error]}}).

int_min_test() ->
    Validator = validator@int:min(<<">=5"/utf8>>, 5),
    gleam@should:equal(Validator(5), {ok, 5}),
    ExpectedError = {error, {<<">=5"/utf8>>, [<<">=5"/utf8>>]}},
    gleam@should:equal(Validator(4), ExpectedError).

int_max_test() ->
    Validator = validator@int:max(<<"<=5"/utf8>>, 5),
    gleam@should:equal(Validator(5), {ok, 5}),
    ExpectedError = {error, {<<"<=5"/utf8>>, [<<"<=5"/utf8>>]}},
    gleam@should:equal(Validator(6), ExpectedError).

list_is_not_empty_test() ->
    Validator = validator@list:is_not_empty(<<"Empty"/utf8>>),
    gleam@should:equal(Validator([1]), {ok, [1]}),
    ExpectedError = {error, {<<"Empty"/utf8>>, [<<"Empty"/utf8>>]}},
    gleam@should:equal(Validator([]), ExpectedError).

list_min_length_test() ->
    Validator = validator@list:min_length(<<"Short"/utf8>>, 3),
    gleam@should:equal(Validator([1, 2, 3]), {ok, [1, 2, 3]}),
    ExpectedError = {error, {<<"Short"/utf8>>, [<<"Short"/utf8>>]}},
    gleam@should:equal(Validator([1, 2]), ExpectedError).

list_max_length_test() ->
    Validator = validator@list:max_length(<<"Long"/utf8>>, 4),
    gleam@should:equal(Validator([1, 2, 3]), {ok, [1, 2, 3]}),
    ExpectedError = {error, {<<"Long"/utf8>>, [<<"Long"/utf8>>]}},
    gleam@should:equal(Validator([1, 2, 3, 4, 5]), ExpectedError).

list_all_test() ->
    ListValidator = validator@list:every(
        validator@string:min_length(<<"Short"/utf8>>, 3)
    ),
    Validator = fun(Thing) ->
        validator:validate(
            validator:build1(fun(A) -> {thing_with_list, A} end),
            erlang:element(2, Thing),
            ListValidator
        )
    end,
    Thing@1 = {thing_with_list, [<<"One"/utf8>>, <<"Two"/utf8>>]},
    gleam@should:equal(Validator(Thing@1), {ok, Thing@1}),
    Thing2 = {thing_with_list, [<<"One"/utf8>>, <<"T"/utf8>>, <<"A"/utf8>>]},
    ExpectedError = {error,
                     {<<"Short"/utf8>>, [<<"Short"/utf8>>, <<"Short"/utf8>>]}},
    gleam@should:equal(Validator(Thing2), ExpectedError).

option_is_some_test() ->
    Validator = validator@option:is_some(<<"Null"/utf8>>),
    gleam@should:equal(
        Validator({some, <<"Hola"/utf8>>}),
        {ok, <<"Hola"/utf8>>}
    ),
    ExpectedError = {error, {<<"Null"/utf8>>, [<<"Null"/utf8>>]}},
    gleam@should:equal(Validator(none), ExpectedError).

option_optional_test() ->
    Validator = validator@option:optional(
        validator@string:min_length(<<"Short"/utf8>>, 3)
    ),
    gleam@should:equal(Validator(none), {ok, none}),
    gleam@should:equal(
        Validator({some, <<"abc"/utf8>>}),
        {ok, {some, <<"abc"/utf8>>}}
    ),
    ExpectedError = {error, {<<"Short"/utf8>>, [<<"Short"/utf8>>]}},
    gleam@should:equal(Validator({some, <<"a"/utf8>>}), ExpectedError).

string_not_empty_test() ->
    Validator = validator@string:is_not_empty(<<"Empty"/utf8>>),
    gleam@should:equal(Validator(<<"One"/utf8>>), {ok, <<"One"/utf8>>}),
    ExpectedError = {error, {<<"Empty"/utf8>>, [<<"Empty"/utf8>>]}},
    gleam@should:equal(Validator(<<""/utf8>>), ExpectedError).

string_is_int_test() ->
    Validator = validator@string:is_int(<<"NaN"/utf8>>),
    gleam@should:equal(Validator(<<"1"/utf8>>), {ok, 1}),
    ExpectedError = {error, {<<"NaN"/utf8>>, [<<"NaN"/utf8>>]}},
    gleam@should:equal(Validator(<<"A"/utf8>>), ExpectedError).

string_is_float_test() ->
    Validator = validator@string:is_float(<<"NaN"/utf8>>),
    gleam@should:equal(Validator(<<"1.1"/utf8>>), {ok, 1.1}),
    ExpectedError = {error, {<<"NaN"/utf8>>, [<<"NaN"/utf8>>]}},
    gleam@should:equal(Validator(<<"A"/utf8>>), ExpectedError).

string_is_email_test() ->
    Validator = validator@string:is_email(<<"Not email"/utf8>>),
    gleam@list:map(
        [<<"a@b"/utf8>>,
         <<"a1@b"/utf8>>,
         <<"a1@b.com"/utf8>>,
         <<"a1@b.com.au"/utf8>>],
        fun(Email) -> gleam@should:equal(Validator(Email), {ok, Email}) end
    ),
    ExpectedError = {error, {<<"Not email"/utf8>>, [<<"Not email"/utf8>>]}},
    gleam@list:map(
        [<<""/utf8>>, <<"a"/utf8>>, <<"a@"/utf8>>, <<"@b"/utf8>>],
        fun(Email@1) ->
            gleam@should:equal(Validator(Email@1), ExpectedError)
        end
    ).

string_min_length_test() ->
    Validator = validator@string:min_length(<<"Less than 3"/utf8>>, 3),
    gleam@should:equal(Validator(<<"One"/utf8>>), {ok, <<"One"/utf8>>}),
    ExpectedError = {error, {<<"Less than 3"/utf8>>, [<<"Less than 3"/utf8>>]}},
    gleam@should:equal(Validator(<<"Tw"/utf8>>), ExpectedError).

string_max_length_test() ->
    Validator = validator@string:max_length(<<"More than 5"/utf8>>, 5),
    gleam@should:equal(Validator(<<"Hello"/utf8>>), {ok, <<"Hello"/utf8>>}),
    ExpectedError = {error, {<<"More than 5"/utf8>>, [<<"More than 5"/utf8>>]}},
    gleam@should:equal(Validator(<<"More than five"/utf8>>), ExpectedError).