# -*- coding: utf-8 -*-

from odoo.tests.common import TransactionCase
from hypothesis import given, strategies as st, settings


class TestKeyboardNavigation(TransactionCase):
    """
    Test cases for keyboard navigation behavior
    
    Property 20: Keyboard navigation enables star selection
    For any star in the rating form, it should be selectable using 
    keyboard navigation (arrow keys and Enter).
    
    Validates: Requirements 8.2
    """

    def setUp(self):
        super(TestKeyboardNavigation, self).setUp()
        # We'll test the keyboard navigation logic that would be used in the frontend
        # The logic is: arrow keys change selection, Enter confirms
        self.max_stars = 5
        self.min_stars = 1

    def _simulate_arrow_right(self, current_value):
        """
        Simulate pressing the ArrowRight key.
        
        This mirrors the logic in rating_stars.js onKeyDown():
        - ArrowRight increases rating by 1
        - Maximum value is maxStars (5)
        
        Args:
            current_value: The current selected value (0-5)
            
        Returns:
            The new selected value after pressing ArrowRight
        """
        if current_value < self.max_stars:
            return current_value + 1
        return current_value

    def _simulate_arrow_left(self, current_value):
        """
        Simulate pressing the ArrowLeft key.
        
        This mirrors the logic in rating_stars.js onKeyDown():
        - ArrowLeft decreases rating by 1
        - Minimum value is 1 (cannot go below 1)
        
        Args:
            current_value: The current selected value (0-5)
            
        Returns:
            The new selected value after pressing ArrowLeft
        """
        if current_value > self.min_stars:
            return current_value - 1
        return current_value

    def _simulate_arrow_up(self, current_value):
        """
        Simulate pressing the ArrowUp key.
        
        This mirrors the logic in rating_stars.js onKeyDown():
        - ArrowUp increases rating by 1 (same as ArrowRight)
        - Maximum value is maxStars (5)
        
        Args:
            current_value: The current selected value (0-5)
            
        Returns:
            The new selected value after pressing ArrowUp
        """
        return self._simulate_arrow_right(current_value)

    def _simulate_arrow_down(self, current_value):
        """
        Simulate pressing the ArrowDown key.
        
        This mirrors the logic in rating_stars.js onKeyDown():
        - ArrowDown decreases rating by 1 (same as ArrowLeft)
        - Minimum value is 1 (cannot go below 1)
        
        Args:
            current_value: The current selected value (0-5)
            
        Returns:
            The new selected value after pressing ArrowDown
        """
        return self._simulate_arrow_left(current_value)

    def _simulate_home_key(self):
        """
        Simulate pressing the Home key.
        
        This mirrors the logic in rating_stars.js onKeyDown():
        - Home jumps to 1 star
        
        Returns:
            The new selected value (always 1)
        """
        return 1

    def _simulate_end_key(self):
        """
        Simulate pressing the End key.
        
        This mirrors the logic in rating_stars.js onKeyDown():
        - End jumps to maxStars (5)
        
        Returns:
            The new selected value (always 5)
        """
        return self.max_stars

    def _verify_keyboard_navigation_property(self, initial_value, key_action):
        """
        Verify that keyboard navigation enables star selection.
        
        The property states: For any star in the rating form, it should be 
        selectable using keyboard navigation (arrow keys and Enter).
        
        Args:
            initial_value: The initial selected value (0-5)
            key_action: The keyboard action to perform ('right', 'left', 'up', 'down', 'home', 'end')
        """
        # Simulate the keyboard action
        if key_action == 'right':
            new_value = self._simulate_arrow_right(initial_value)
        elif key_action == 'left':
            new_value = self._simulate_arrow_left(initial_value)
        elif key_action == 'up':
            new_value = self._simulate_arrow_up(initial_value)
        elif key_action == 'down':
            new_value = self._simulate_arrow_down(initial_value)
        elif key_action == 'home':
            new_value = self._simulate_home_key()
        elif key_action == 'end':
            new_value = self._simulate_end_key()
        else:
            raise ValueError(f"Unknown key action: {key_action}")

        # Property 1: New value should be within valid range
        self.assertGreaterEqual(
            new_value,
            0,
            f"After {key_action} from {initial_value}, value should be >= 0, got {new_value}"
        )
        self.assertLessEqual(
            new_value,
            self.max_stars,
            f"After {key_action} from {initial_value}, value should be <= {self.max_stars}, got {new_value}"
        )

        # Property 2: Value should change appropriately based on key action
        if key_action in ['right', 'up']:
            if initial_value < self.max_stars:
                self.assertEqual(
                    new_value,
                    initial_value + 1,
                    f"Arrow right/up from {initial_value} should increase to {initial_value + 1}"
                )
            else:
                self.assertEqual(
                    new_value,
                    initial_value,
                    f"Arrow right/up from max value {initial_value} should stay at {initial_value}"
                )
        elif key_action in ['left', 'down']:
            if initial_value > self.min_stars:
                self.assertEqual(
                    new_value,
                    initial_value - 1,
                    f"Arrow left/down from {initial_value} should decrease to {initial_value - 1}"
                )
            else:
                self.assertEqual(
                    new_value,
                    initial_value,
                    f"Arrow left/down from min value {initial_value} should stay at {initial_value}"
                )
        elif key_action == 'home':
            self.assertEqual(
                new_value,
                1,
                f"Home key should jump to 1 star"
            )
        elif key_action == 'end':
            self.assertEqual(
                new_value,
                self.max_stars,
                f"End key should jump to {self.max_stars} stars"
            )

        return new_value

    # Feature: helpdesk-rating-five-stars, Property 20: Keyboard navigation enables star selection
    @given(
        initial_value=st.integers(min_value=0, max_value=5),
        key_action=st.sampled_from(['right', 'left', 'up', 'down', 'home', 'end'])
    )
    @settings(max_examples=100, deadline=None)
    def test_property_keyboard_navigation_enables_selection(self, initial_value, key_action):
        """
        Property 20: Keyboard navigation enables star selection
        
        For any initial rating value (0-5) and any keyboard action 
        (arrow keys, Home, End), the system should enable star selection 
        through keyboard navigation.
        
        This tests that:
        1. Arrow keys change the rating value appropriately
        2. Home/End keys jump to min/max values
        3. Values stay within valid range (1-5)
        4. Keyboard navigation provides an alternative to mouse clicks
        
        Validates: Requirements 8.2
        """
        self._verify_keyboard_navigation_property(initial_value, key_action)

    def test_keyboard_navigation_arrow_right(self):
        """
        Test that ArrowRight increases rating by 1
        """
        # Test from each possible value
        for value in range(0, self.max_stars):
            new_value = self._simulate_arrow_right(value)
            if value < self.max_stars:
                self.assertEqual(
                    new_value,
                    value + 1,
                    f"ArrowRight from {value} should increase to {value + 1}"
                )
            else:
                self.assertEqual(
                    new_value,
                    value,
                    f"ArrowRight from max {value} should stay at {value}"
                )

    def test_keyboard_navigation_arrow_left(self):
        """
        Test that ArrowLeft decreases rating by 1
        """
        # Test from each possible value
        for value in range(1, self.max_stars + 1):
            new_value = self._simulate_arrow_left(value)
            if value > self.min_stars:
                self.assertEqual(
                    new_value,
                    value - 1,
                    f"ArrowLeft from {value} should decrease to {value - 1}"
                )
            else:
                self.assertEqual(
                    new_value,
                    value,
                    f"ArrowLeft from min {value} should stay at {value}"
                )

    def test_keyboard_navigation_arrow_up(self):
        """
        Test that ArrowUp increases rating by 1 (same as ArrowRight)
        """
        for value in range(0, self.max_stars):
            new_value = self._simulate_arrow_up(value)
            if value < self.max_stars:
                self.assertEqual(
                    new_value,
                    value + 1,
                    f"ArrowUp from {value} should increase to {value + 1}"
                )

    def test_keyboard_navigation_arrow_down(self):
        """
        Test that ArrowDown decreases rating by 1 (same as ArrowLeft)
        """
        for value in range(1, self.max_stars + 1):
            new_value = self._simulate_arrow_down(value)
            if value > self.min_stars:
                self.assertEqual(
                    new_value,
                    value - 1,
                    f"ArrowDown from {value} should decrease to {value - 1}"
                )

    def test_keyboard_navigation_home_key(self):
        """
        Test that Home key jumps to 1 star
        """
        # From any value, Home should go to 1
        for value in range(0, self.max_stars + 1):
            new_value = self._simulate_home_key()
            self.assertEqual(
                new_value,
                1,
                f"Home key from {value} should jump to 1"
            )

    def test_keyboard_navigation_end_key(self):
        """
        Test that End key jumps to 5 stars
        """
        # From any value, End should go to maxStars
        for value in range(0, self.max_stars + 1):
            new_value = self._simulate_end_key()
            self.assertEqual(
                new_value,
                self.max_stars,
                f"End key from {value} should jump to {self.max_stars}"
            )

    def test_keyboard_navigation_boundary_cases(self):
        """
        Test boundary cases for keyboard navigation
        """
        # Test at minimum value (1)
        new_value = self._simulate_arrow_left(1)
        self.assertEqual(new_value, 1, "Cannot go below 1 with ArrowLeft")
        
        new_value = self._simulate_arrow_down(1)
        self.assertEqual(new_value, 1, "Cannot go below 1 with ArrowDown")
        
        # Test at maximum value (5)
        new_value = self._simulate_arrow_right(5)
        self.assertEqual(new_value, 5, "Cannot go above 5 with ArrowRight")
        
        new_value = self._simulate_arrow_up(5)
        self.assertEqual(new_value, 5, "Cannot go above 5 with ArrowUp")
        
        # Test at zero (edge case)
        new_value = self._simulate_arrow_right(0)
        self.assertEqual(new_value, 1, "ArrowRight from 0 should go to 1")
        
        new_value = self._simulate_arrow_left(0)
        self.assertEqual(new_value, 0, "ArrowLeft from 0 should stay at 0")

    def test_keyboard_navigation_sequential_increase(self):
        """
        Test sequential keyboard navigation from 0 to 5
        """
        value = 0
        
        # Press ArrowRight 5 times to go from 0 to 5
        for expected in range(1, self.max_stars + 1):
            value = self._simulate_arrow_right(value)
            self.assertEqual(
                value,
                expected,
                f"After {expected} ArrowRight presses, value should be {expected}"
            )
        
        # One more press should stay at 5
        value = self._simulate_arrow_right(value)
        self.assertEqual(value, 5, "Should stay at max value 5")

    def test_keyboard_navigation_sequential_decrease(self):
        """
        Test sequential keyboard navigation from 5 to 1
        """
        value = 5
        
        # Press ArrowLeft 4 times to go from 5 to 1
        for expected in range(4, 0, -1):
            value = self._simulate_arrow_left(value)
            self.assertEqual(
                value,
                expected,
                f"After pressing ArrowLeft, value should be {expected}"
            )
        
        # One more press should stay at 1
        value = self._simulate_arrow_left(value)
        self.assertEqual(value, 1, "Should stay at min value 1")

    def test_keyboard_navigation_mixed_keys(self):
        """
        Test mixed keyboard navigation (up, down, left, right)
        """
        # Start at 3
        value = 3
        
        # Right -> 4
        value = self._simulate_arrow_right(value)
        self.assertEqual(value, 4)
        
        # Left -> 3
        value = self._simulate_arrow_left(value)
        self.assertEqual(value, 3)
        
        # Up -> 4
        value = self._simulate_arrow_up(value)
        self.assertEqual(value, 4)
        
        # Down -> 3
        value = self._simulate_arrow_down(value)
        self.assertEqual(value, 3)
        
        # Home -> 1
        value = self._simulate_home_key()
        self.assertEqual(value, 1)
        
        # End -> 5
        value = self._simulate_end_key()
        self.assertEqual(value, 5)

    def test_keyboard_navigation_consistency(self):
        """
        Test that keyboard navigation is consistent across multiple calls
        """
        for initial_value in range(0, self.max_stars + 1):
            # Test ArrowRight consistency
            result1 = self._simulate_arrow_right(initial_value)
            result2 = self._simulate_arrow_right(initial_value)
            result3 = self._simulate_arrow_right(initial_value)
            self.assertEqual(result1, result2, "ArrowRight should be consistent")
            self.assertEqual(result2, result3, "ArrowRight should be consistent")
            
            # Test ArrowLeft consistency
            if initial_value > 0:
                result1 = self._simulate_arrow_left(initial_value)
                result2 = self._simulate_arrow_left(initial_value)
                result3 = self._simulate_arrow_left(initial_value)
                self.assertEqual(result1, result2, "ArrowLeft should be consistent")
                self.assertEqual(result2, result3, "ArrowLeft should be consistent")

    def test_keyboard_navigation_all_values_reachable(self):
        """
        Test that all rating values (1-5) are reachable via keyboard
        """
        # Starting from 0, we should be able to reach all values 1-5
        value = 0
        reachable_values = set()
        
        # Use ArrowRight to reach each value
        for _ in range(self.max_stars):
            value = self._simulate_arrow_right(value)
            reachable_values.add(value)
        
        # All values 1-5 should be reachable
        expected_values = set(range(1, self.max_stars + 1))
        self.assertEqual(
            reachable_values,
            expected_values,
            f"All values {expected_values} should be reachable via keyboard"
        )

    def test_keyboard_navigation_independence(self):
        """
        Test that keyboard navigation works independently of mouse interaction
        """
        # This test verifies that keyboard navigation logic is independent
        # In the actual implementation, keyboard and mouse should both work
        
        # Simulate selecting with keyboard
        keyboard_value = 0
        keyboard_value = self._simulate_arrow_right(keyboard_value)
        keyboard_value = self._simulate_arrow_right(keyboard_value)
        keyboard_value = self._simulate_arrow_right(keyboard_value)
        
        # Should reach 3
        self.assertEqual(keyboard_value, 3, "Keyboard navigation should reach 3")
        
        # Keyboard navigation should work from any starting point
        # (simulating that mouse could have set any value)
        for mouse_value in range(0, self.max_stars + 1):
            # From any mouse-selected value, keyboard should work
            new_value = self._simulate_arrow_right(mouse_value)
            if mouse_value < self.max_stars:
                self.assertEqual(
                    new_value,
                    mouse_value + 1,
                    f"Keyboard should work from mouse-selected value {mouse_value}"
                )

    def test_keyboard_navigation_rapid_input(self):
        """
        Test rapid keyboard input (multiple key presses in sequence)
        """
        value = 0
        
        # Simulate rapid ArrowRight presses
        for i in range(10):
            value = self._simulate_arrow_right(value)
        
        # Should cap at max value
        self.assertEqual(
            value,
            self.max_stars,
            f"Rapid ArrowRight should cap at {self.max_stars}"
        )
        
        # Simulate rapid ArrowLeft presses
        for i in range(10):
            value = self._simulate_arrow_left(value)
        
        # Should cap at min value
        self.assertEqual(
            value,
            self.min_stars,
            f"Rapid ArrowLeft should cap at {self.min_stars}"
        )

    def test_keyboard_navigation_alternating_directions(self):
        """
        Test alternating keyboard directions
        """
        value = 3
        
        # Alternate right and left
        for _ in range(5):
            original = value
            value = self._simulate_arrow_right(value)
            value = self._simulate_arrow_left(value)
            # Should return to original (unless at boundary)
            if original > self.min_stars and original < self.max_stars:
                self.assertEqual(
                    value,
                    original,
                    "Alternating right/left should return to original"
                )