grindlemire/go-tui code browser

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package tui

import (
	"testing"
)

// --- Hit Testing Tests ---

func TestElement_ElementAt_ReturnsNilForPointOutsideBounds(t *testing.T) {
	e := New(WithWidth(10), WithHeight(10))
	// Calculate layout so the element has a position
	buf := NewBuffer(80, 25)
	e.Render(buf, 80, 25)

	result := e.ElementAt(50, 50)
	if result != nil {
		t.Error("ElementAt should return nil for points outside the element's bounds")
	}
}

func TestElement_ElementAt_ReturnsSelfForPointInsideBounds(t *testing.T) {
	e := New(WithWidth(10), WithHeight(10))
	// Calculate layout so the element has a position
	buf := NewBuffer(80, 25)
	e.Render(buf, 80, 25)

	result := e.ElementAt(5, 5)
	if result != e {
		t.Error("ElementAt should return the element itself when point is inside bounds and no children")
	}
}

func TestElement_ElementAt_ReturnsChildForPointInsideChild(t *testing.T) {
	parent := New(
		WithWidth(100),
		WithHeight(100),
		WithDirection(Column),
	)
	child := New(WithWidth(50), WithHeight(50))
	parent.AddChild(child)

	// Calculate layout
	buf := NewBuffer(100, 100)
	parent.Render(buf, 100, 100)

	// Point inside child bounds (child starts at 0,0 and is 50x50)
	result := parent.ElementAt(10, 10)
	if result != child {
		t.Error("ElementAt should return the child when point is inside child bounds")
	}
}

func TestElement_ElementAt_ReturnsDeepestChild(t *testing.T) {
	root := New(
		WithWidth(100),
		WithHeight(100),
	)
	child1 := New(WithWidth(80), WithHeight(80))
	child2 := New(WithWidth(60), WithHeight(60))
	grandchild := New(WithWidth(40), WithHeight(40))

	child2.AddChild(grandchild)
	child1.AddChild(child2)
	root.AddChild(child1)

	// Calculate layout
	buf := NewBuffer(100, 100)
	root.Render(buf, 100, 100)

	// Point inside grandchild bounds (should be at 0,0)
	result := root.ElementAt(10, 10)
	if result != grandchild {
		t.Error("ElementAt should return the deepest child containing the point")
	}
}

func TestElement_ElementAt_LastChildTakesPrecedence(t *testing.T) {
	// When children overlap, last child should take precedence (renders on top)
	parent := New(
		WithWidth(100),
		WithHeight(100),
	)
	// Both children start at 0,0 with same size
	child1 := New(WithWidth(50), WithHeight(50))
	child2 := New(WithWidth(50), WithHeight(50))

	parent.AddChild(child1)
	parent.AddChild(child2)

	// Calculate layout - both children will be at position (0,0)
	buf := NewBuffer(100, 100)
	parent.Render(buf, 100, 100)

	result := parent.ElementAt(10, 10)
	// child2 was added last, so it should take precedence
	// However, with default layout (row), they won't overlap.
	// Let's just verify we get one of the children
	if result != child1 && result != child2 {
		t.Error("ElementAt should return one of the children for overlapping bounds")
	}
}

func TestElement_ElementAtPoint_ReturnsFocusable(t *testing.T) {
	// Test that ElementAtPoint returns a Focusable interface
	e := New(WithWidth(10), WithHeight(10))
	buf := NewBuffer(80, 25)
	e.Render(buf, 80, 25)

	result := e.ElementAtPoint(5, 5)
	if result == nil {
		t.Error("ElementAtPoint should return a non-nil Focusable")
	}
	// Verify it's the same underlying element
	if result.(*Element) != e {
		t.Error("ElementAtPoint should return the element wrapped as Focusable")
	}
}

func TestElement_ElementAtPoint_ReturnsNilForPointOutsideBounds(t *testing.T) {
	e := New(WithWidth(10), WithHeight(10))
	buf := NewBuffer(80, 25)
	e.Render(buf, 80, 25)

	result := e.ElementAtPoint(50, 50)
	if result != nil {
		t.Error("ElementAtPoint should return nil for points outside bounds")
	}
}

// --- HandleEvent Tests ---

func TestElement_HandleEvent_MouseNotHandledByDefault(t *testing.T) {
	e := New()

	event := MouseEvent{
		Button: MouseLeft,
		Action: MousePress,
		X:      5,
		Y:      5,
	}
	consumed := e.HandleEvent(event)

	if consumed {
		t.Error("HandleEvent should return false for mouse events (mouse handling is via component HandleMouse)")
	}
}

func TestElement_HandleEvent_KeyNotHandledByDefault(t *testing.T) {
	e := New()

	event := KeyEvent{Key: KeyRune, Rune: 'x'}
	consumed := e.HandleEvent(event)

	if consumed {
		t.Error("HandleEvent should return false for key events (key handling is via component KeyMap)")
	}
}