-module(valguard).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/valguard.gleam").
-export([append_error/2, list/2, collect_errors/1, prepare/1, prepare_with/2, with/3, with_optional/3]).
-export_type([validation_error/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 validation_error() :: {validation_error, binary(), binary()}.

-file("src/valguard.gleam", 15).
?DOC(
    " Takes a validation result and list of validation errors\n"
    " If result is error, it adds it to the list\n"
).
-spec append_error(
    {ok, nil} | {error, validation_error()},
    list(validation_error())
) -> list(validation_error()).
append_error(Result, List) ->
    case Result of
        {error, Validation_error} ->
            lists:append(List, [Validation_error]);

        {ok, nil} ->
            List
    end.

-file("src/valguard.gleam", 83).
?DOC(" Inner recursive loop for list\n").
-spec list_inner(
    list(fun(() -> {ok, nil} | {error, binary()})),
    {ok, nil} | {error, binary()}
) -> {ok, nil} | {error, binary()}.
list_inner(List, Prev) ->
    gleam@result:'try'(Prev, fun(_) -> case List of
                [] ->
                    Prev;

                [Next | Rest] ->
                    list_inner(Rest, Next())
            end end).

-file("src/valguard.gleam", 71).
?DOC(
    " Validates a list of requirements lazily.\n"
    "\n"
    " Takes a key and list of validation functions.\n"
    "\n"
    " Returns Ok(Nil) if success or Error(String) at first issue\n"
).
-spec list(binary(), list(fun(() -> {ok, nil} | {error, binary()}))) -> {ok,
        nil} |
    {error, validation_error()}.
list(Key, List) ->
    case list_inner(List, {ok, nil}) of
        {ok, nil} ->
            {ok, nil};

        {error, Value} ->
            {error, {validation_error, Key, Value}}
    end.

-file("src/valguard.gleam", 29).
?DOC(
    " Takes a list of validation results and returns a list of the errors\n"
    " Returns an empty list if no errors\n"
).
-spec collect_errors(list({ok, nil} | {error, validation_error()})) -> list(validation_error()).
collect_errors(Inputs) ->
    gleam@list:filter_map(Inputs, fun(X) -> case X of
                {ok, nil} ->
                    {error, nil};

                {error, Validation_error} ->
                    {ok, Validation_error}
            end end).

-file("src/valguard.gleam", 43).
?DOC(
    " Takes a list of validation errors and converts it to a result\n"
    " Returns ok if list is empty\n"
).
-spec prepare(list(validation_error())) -> {ok, nil} |
    {error, list(validation_error())}.
prepare(Errors) ->
    case gleam@list:is_empty(Errors) of
        true ->
            {ok, nil};

        false ->
            {error, Errors}
    end.

-file("src/valguard.gleam", 56).
?DOC(
    " Takes a list of validation errors and converts it to a result\n"
    " wrapping the errors in a custom type. Returns Ok(Nil) if list is empty.\n"
    "\n"
    " This functions similar to `valguard.prepare`.\n"
).
-spec prepare_with(
    list(validation_error()),
    fun((list(validation_error())) -> EMI)
) -> {ok, nil} | {error, EMI}.
prepare_with(Errors, Custom_type) ->
    case gleam@list:is_empty(Errors) of
        true ->
            {ok, nil};

        false ->
            {error, Custom_type(Errors)}
    end.

-file("src/valguard.gleam", 136).
?DOC(" Inner recursive loop for with\n").
-spec with_inner(
    list(fun((ENL) -> {ok, nil} | {error, binary()})),
    ENL,
    {ok, nil} | {error, binary()}
) -> {ok, nil} | {error, binary()}.
with_inner(List, Value, Prev) ->
    gleam@result:'try'(Prev, fun(_) -> case List of
                [] ->
                    Prev;

                [Next | Rest] ->
                    with_inner(Rest, Value, Next(Value))
            end end).

-file("src/valguard.gleam", 101).
?DOC(
    " Validates a list of requirements lazily.\n"
    "\n"
    " Takes a key, value and list of validation functions.\n"
    "\n"
    " Runs validation functions lazily and returns the result.\n"
    " Returns Ok(Nil) if success or Error(String) at first issue\n"
).
-spec with(binary(), EMY, list(fun((EMY) -> {ok, nil} | {error, binary()}))) -> {ok,
        nil} |
    {error, validation_error()}.
with(Key, Value, List) ->
    case with_inner(List, Value, {ok, nil}) of
        {ok, nil} ->
            {ok, nil};

        {error, Value@1} ->
            {error, {validation_error, Key, Value@1}}
    end.

-file("src/valguard.gleam", 120).
?DOC(
    " Validates a list of requirements lazily.\n"
    "\n"
    " Takes a key, an optional value and list of validation functions.\n"
    "\n"
    " Runs validation functions lazily and returns the result.\n"
    " Returns Ok(Nil) if optional value is None or all validations are successful.\n"
    " Returns Error(String) at first issue.\n"
).
-spec with_optional(
    binary(),
    gleam@option:option(ENE),
    list(fun((ENE) -> {ok, nil} | {error, binary()}))
) -> {ok, nil} | {error, validation_error()}.
with_optional(Key, Option, List) ->
    valguard@internal@utils:some_or(
        Option,
        {ok, nil},
        fun(Value) -> case with_inner(List, Value, {ok, nil}) of
                {ok, nil} ->
                    {ok, nil};

                {error, Value@1} ->
                    {error, {validation_error, Key, Value@1}}
            end end
    ).