"""
Test for forms example (10_forms_demo.py).

This test ensures the forms example runs correctly and produces expected output.
"""

import pytest
import sys
from pathlib import Path
import importlib.util

# Add examples to path
examples_dir = Path(__file__).parent.parent.parent / "examples"
sys.path.insert(0, str(examples_dir))

# Load the demo module
spec = importlib.util.spec_from_file_location(
    "forms_demo",
    examples_dir / "10_forms_demo.py"
)
demo_module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(demo_module)


def test_forms_demo_imports():
    """Test that the forms demo can be imported without errors."""
    assert demo_module is not None


def test_form_submit_callback():
    """Test that form submit callbacks work correctly."""
    form_submit_callback = demo_module.form_submit_callback
    demo_module.form_submissions = []

    callback = form_submit_callback("test_form")
    callback({"field1": "value1"})

    assert len(demo_module.form_submissions) == 1
    assert demo_module.form_submissions[0][0] == "test_form"
    assert demo_module.form_submissions[0][1] == {"field1": "value1"}


def test_create_example_1_text_fields():
    """Test creating text fields example."""
    create_example_1 = demo_module.create_example_1_text_fields
    from pyWebLayout.concrete.page import Page

    page = create_example_1()
    assert isinstance(page, Page)
    assert page.size == (500, 600)


def test_create_example_2_number_fields():
    """Test creating number fields example."""
    create_example_2 = demo_module.create_example_2_number_fields
    from pyWebLayout.concrete.page import Page

    page = create_example_2()
    assert isinstance(page, Page)
    assert page.size == (500, 600)


def test_create_example_3_selection_fields():
    """Test creating selection fields example."""
    create_example_3 = demo_module.create_example_3_selection_fields
    from pyWebLayout.concrete.page import Page

    page = create_example_3()
    assert isinstance(page, Page)
    assert page.size == (500, 600)


def test_create_example_4_complete_form():
    """Test creating complete form example."""
    create_example_4 = demo_module.create_example_4_complete_form
    from pyWebLayout.concrete.page import Page

    page = create_example_4()
    assert isinstance(page, Page)
    assert page.size == (500, 700)


def test_all_form_field_types():
    """Test that all FormFieldType values are demonstrated."""
    from pyWebLayout.abstract.functional import FormFieldType

    # All field types that should be in examples
    expected_types = {
        FormFieldType.TEXT,
        FormFieldType.PASSWORD,
        FormFieldType.EMAIL,
        FormFieldType.URL,
        FormFieldType.TEXTAREA,
        FormFieldType.NUMBER,
        FormFieldType.DATE,
        FormFieldType.TIME,
        FormFieldType.RANGE,
        FormFieldType.COLOR,
        FormFieldType.CHECKBOX,
        FormFieldType.RADIO,
        FormFieldType.SELECT,
        FormFieldType.HIDDEN
    }

    # This test verifies that the example includes all major field types
    # (the actual verification would happen by inspecting the forms,
    # but this confirms the enum exists)
    assert len(expected_types) == 14


def test_combine_pages_into_grid():
    """Test combining pages into grid."""
    combine_pages_into_grid = demo_module.combine_pages_into_grid
    from pyWebLayout.concrete.page import Page
    from pyWebLayout.style.page_style import PageStyle

    # Create a few pages
    page_style = PageStyle()
    pages = [
        Page(size=(200, 200), style=page_style),
        Page(size=(200, 200), style=page_style),
        Page(size=(200, 200), style=page_style),
        Page(size=(200, 200), style=page_style)
    ]

    combined = combine_pages_into_grid(pages, "Test Title")

    # Should create a combined image
    from PIL import Image
    assert isinstance(combined, Image.Image)


def test_main_function():
    """Test that the main function runs without errors."""
    main = demo_module.main

    # Run main (will create output files)
    result = main()

    # Should return combined image and form submissions
    assert result is not None
    assert len(result) == 2

    combined_image, form_submissions = result

    # Should be a PIL image
    from PIL import Image
    assert isinstance(combined_image, Image.Image)

    # Form submissions should be a list
    assert isinstance(form_submissions, list)

    # Output file should exist
    output_dir = Path("docs/images")
    assert (output_dir / "example_10_forms.png").exists()


if __name__ == "__main__":
    pytest.main([__file__, "-v"])