"""Tests for the Gherkin generator module."""

import pytest
from nl2gherkin.gherkin.generator import (
    GherkinFeature,
    GherkinGenerator,
    GherkinScenario,
    ScenarioType,
)
from nl2gherkin.nlp.analyzer import ActionType, ActorType, RequirementAnalysis


class TestGherkinGenerator:
    """Test cases for GherkinGenerator."""

    @pytest.fixture
    def generator(self):
        """Create a generator instance."""
        return GherkinGenerator()

    @pytest.fixture
    def analysis(self):
        """Create a sample analysis."""
        return RequirementAnalysis(
            raw_text="As a user, I want to login",
            actor="user",
            actor_type=ActorType.USER,
            action="login",
            action_type=ActionType.LOGIN,
            target="account",
        )

    def test_generate_simple_scenario(self, generator, analysis):
        """Test generating a simple scenario."""
        result = generator.generate(analysis)

        assert "Feature:" in result
        assert "Scenario:" in result
        assert "Given" in result
        assert "When" in result
        assert "Then" in result

    def test_feature_name_from_actor_and_action(self, generator, analysis):
        """Test feature name is derived from actor and action."""
        result = generator.generate(analysis)

        assert "user login" in result.lower()

    def test_scenario_name_generation(self, generator, analysis):
        """Test scenario name is properly generated."""
        scenario = generator.generate_scenario(analysis)

        assert scenario.name is not None
        assert len(scenario.name) > 0

    def test_scenario_type_regular(self, generator, analysis):
        """Test regular scenario type."""
        scenario = generator.generate_scenario(analysis)

        assert scenario.scenario_type == ScenarioType.SCENARIO

    def test_scenario_type_outline_with_variables(self, generator):
        """Test scenario outline type with variables."""
        analysis = RequirementAnalysis(
            raw_text="As a user, I want to search for <product>",
            actor="user",
            action="search",
            variables={"product": "string"},
            examples=["product"],
        )

        scenario = generator.generate_scenario(analysis)

        assert scenario.scenario_type == ScenarioType.SCENARIO_OUTLINE

    def test_examples_table_generation(self, generator):
        """Test Examples table is generated for outlines."""
        analysis = RequirementAnalysis(
            raw_text="As a user, I want to search for <product>",
            actor="user",
            action="search",
            variables={"product": "string"},
            examples=["product"],
        )

        result = generator.generate(analysis)

        assert "Examples:" in result
        assert "| product |" in result

    def test_steps_have_correct_keywords(self, generator, analysis):
        """Test that steps have correct Gherkin keywords."""
        scenario = generator.generate_scenario(analysis)

        keywords = [step.keyword for step in scenario.steps]
        assert "Given" in keywords
        assert "When" in keywords
        assert "Then" in keywords

    def test_benefit_in_description(self, generator):
        """Test that benefit is included in description."""
        analysis = RequirementAnalysis(
            raw_text="As a user, I want to login so that I can access my account",
            actor="user",
            action="login",
            benefit="I can access my account",
        )

        result = generator.generate(analysis)

        assert "can access my account" in result

    def test_condition_as_given(self, generator):
        """Test that conditions are converted to Given steps."""
        analysis = RequirementAnalysis(
            raw_text="When the user is logged in",
            actor="user",
            action="view",
            target="dashboard",
            condition="the user is logged in",
        )

        scenario = generator.generate_scenario(analysis)

        given_steps = [s for s in scenario.steps if s.keyword == "Given"]
        assert len(given_steps) >= 1

    def test_read_action_display_then_step(self, generator):
        """Test that read actions use 'displayed' in Then step."""
        analysis = RequirementAnalysis(
            raw_text="As a user, I want to view my profile",
            actor="user",
            action="view",
            action_type=ActionType.READ,
            target="profile",
        )

        scenario = generator.generate_scenario(analysis)

        then_steps = [s for s in scenario.steps if s.keyword == "Then"]
        assert len(then_steps) > 0
        assert "displayed" in then_steps[0].text.lower()

    def test_empty_analysis(self, generator):
        """Test handling of empty analysis."""
        analysis = RequirementAnalysis(raw_text="")

        result = generator.generate(analysis)

        assert "Feature:" in result

    def test_render_feature_structure(self, generator, analysis):
        """Test that rendered feature has proper structure."""
        feature = generator._create_feature(analysis)

        assert isinstance(feature, GherkinFeature)
        assert feature.name is not None
        assert len(feature.scenarios) == 1
        assert isinstance(feature.scenarios[0], GherkinScenario)

    def test_multiple_scenarios(self, generator):
        """Test generating multiple scenarios."""
        analysis1 = RequirementAnalysis(
            raw_text="As a user, I want to login",
            actor="user",
            action="login",
        )
        analysis2 = RequirementAnalysis(
            raw_text="As a user, I want to logout",
            actor="user",
            action="logout",
        )

        feature1 = generator._create_feature(analysis1)
        feature2 = generator._create_feature(analysis2)

        assert len(feature1.scenarios) == 1
        assert len(feature2.scenarios) == 1