-module(dream_test@gherkin@types).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/dream_test/gherkin/types.gleam").
-export([keyword_to_string/1, keyword_from_string/1, resolve_keyword/2, empty_examples/0, empty_background/0]).
-export_type([step_keyword/0, step_argument/0, step/0, background/0, examples_table/0, scenario/0, feature/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(
    " Gherkin types for dream_test.\n"
    "\n"
    " This module defines the data structures representing parsed Gherkin\n"
    " `.feature` files. These types are used by the parser and converted\n"
    " to dream_test's `TestCase` and `TestSuite` types for execution.\n"
    "\n"
    " ## Type Overview\n"
    "\n"
    " | Type              | Purpose                                          |\n"
    " |-------------------|--------------------------------------------------|\n"
    " | `Feature`         | A parsed `.feature` file                         |\n"
    " | `Scenario`        | A single scenario or scenario outline            |\n"
    " | `Step`            | A Given/When/Then step with text                 |\n"
    " | `StepKeyword`     | The keyword type (Given, When, Then, And, But)   |\n"
    " | `StepArgument`    | Optional DocString or DataTable                  |\n"
    " | `Background`      | Steps to run before each scenario                |\n"
    " | `ExamplesTable`   | Data table for Scenario Outline expansion        |\n"
    "\n"
    " ## Gherkin Syntax Reference\n"
    "\n"
    " ```gherkin\n"
    " @tag1 @tag2\n"
    " Feature: Shopping Cart\n"
    "   As a customer\n"
    "   I want to manage my cart\n"
    "\n"
    "   Background:\n"
    "     Given I am logged in\n"
    "\n"
    "   Scenario: Adding items\n"
    "     Given I have an empty cart\n"
    "     When I add 3 items of \"Widget\"\n"
    "     Then my cart should have 3 items\n"
    "\n"
    "   Scenario Outline: Multiple products\n"
    "     Given I have an empty cart\n"
    "     When I add <quantity> items of \"<product>\"\n"
    "     Then my cart should have <quantity> items\n"
    "\n"
    "     Examples:\n"
    "       | quantity | product |\n"
    "       | 1        | Widget  |\n"
    "       | 5        | Gadget  |\n"
    " ```\n"
).

-type step_keyword() :: given | 'when' | then | 'and' | but.

-type step_argument() :: {doc_string, binary(), gleam@option:option(binary())} |
    {data_table, list(list(binary()))}.

-type step() :: {step,
        step_keyword(),
        binary(),
        gleam@option:option(step_argument())}.

-type background() :: {background, list(step())}.

-type examples_table() :: {examples_table, list(binary()), list(list(binary()))}.

-type scenario() :: {scenario, binary(), list(binary()), list(step())} |
    {scenario_outline, binary(), list(binary()), list(step()), examples_table()}.

-type feature() :: {feature,
        binary(),
        gleam@option:option(binary()),
        list(binary()),
        gleam@option:option(background()),
        list(scenario())}.

-file("src/dream_test/gherkin/types.gleam", 315).
?DOC(
    " Convert a StepKeyword to its string representation.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " keyword_to_string(Given)  // -> \"Given\"\n"
    " keyword_to_string(And)    // -> \"And\"\n"
    " ```\n"
).
-spec keyword_to_string(step_keyword()) -> binary().
keyword_to_string(Keyword) ->
    case Keyword of
        given ->
            <<"Given"/utf8>>;

        'when' ->
            <<"When"/utf8>>;

        then ->
            <<"Then"/utf8>>;

        'and' ->
            <<"And"/utf8>>;

        but ->
            <<"But"/utf8>>
    end.

-file("src/dream_test/gherkin/types.gleam", 336).
?DOC(
    " Parse a string to a StepKeyword.\n"
    "\n"
    " Returns the keyword if recognized, or None for unknown strings.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " keyword_from_string(\"Given\")  // -> Some(Given)\n"
    " keyword_from_string(\"Hello\")  // -> None\n"
    " ```\n"
).
-spec keyword_from_string(binary()) -> gleam@option:option(step_keyword()).
keyword_from_string(Text) ->
    case Text of
        <<"Given"/utf8>> ->
            {some, given};

        <<"When"/utf8>> ->
            {some, 'when'};

        <<"Then"/utf8>> ->
            {some, then};

        <<"And"/utf8>> ->
            {some, 'and'};

        <<"But"/utf8>> ->
            {some, but};

        _ ->
            none
    end.

-file("src/dream_test/gherkin/types.gleam", 360).
?DOC(
    " Resolve And/But to the effective keyword based on previous step.\n"
    "\n"
    " In Gherkin, `And` and `But` inherit meaning from the previous step.\n"
    " This function resolves them to their effective keyword type.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " resolve_keyword(And, Given)  // -> Given\n"
    " resolve_keyword(But, Then)   // -> Then\n"
    " resolve_keyword(When, Given) // -> When (non-And/But unchanged)\n"
    " ```\n"
).
-spec resolve_keyword(step_keyword(), step_keyword()) -> step_keyword().
resolve_keyword(Keyword, Previous) ->
    case Keyword of
        'and' ->
            Previous;

        but ->
            Previous;

        Other ->
            Other
    end.

-file("src/dream_test/gherkin/types.gleam", 375).
?DOC(
    " Create an empty examples table.\n"
    "\n"
    " Useful as a default value or for testing.\n"
).
-spec empty_examples() -> examples_table().
empty_examples() ->
    {examples_table, [], []}.

-file("src/dream_test/gherkin/types.gleam", 383).
?DOC(
    " Create an empty background.\n"
    "\n"
    " Useful as a default value or for testing.\n"
).
-spec empty_background() -> background().
empty_background() ->
    {background, []}.