try:
    from textwrap import dedent
except ImportError:
    dedent = lambda x: x

import inspect

import styles
import tictactoe
from pyweb import pydom
from pyweb.ui import elements as el
from pyweb.ui import shoelace
from pyweb.ui.markdown import markdown

from pyscript import when, window

MAIN_PAGE_MARKDOWN = dedent(
    """
    This gallery is a collection of demos using the PyWeb.UI library. There are meant
    to be examples of how to use the library to create GUI applications using Python
    only.

    ## How to use the gallery

    Simply click on the demo you want to see and the details will appear on the right
    """
)

# First thing we do is to load all the external resources we need
shoelace.load_resources()


def add_demo(demo_name, demo_creator_cb, parent_div, source=None):
    """Create a link to a component and add it to the left panel.

    Args:
        component (str): The name of the component to add.

    Returns:
        the component created

    """
    # Create the component link element
    div = el.div(el.a(demo_name, href="#"), style=styles.STYLE_LEFT_PANEL_LINKS)

    # Create a handler that opens the component details when the link is clicked
    @when("click", div)
    def _change():
        if source:
            demo_div = el.grid("50% 50%")
            demo_div.append(demo_creator_cb())
            widget_code = markdown(dedent(f"""```python\n{source}\n```"""))
            demo_div.append(el.div(widget_code, style=styles.STYLE_CODE_BLOCK))
        else:
            demo_div = demo_creator_cb()
        demo_div.style["margin"] = "20px"
        write_to_main(demo_div)
        window.hljs.highlightAll()

    # Add the new link element to the parent div (left panel)
    parent_div.append(div)
    return div


def create_main_area():
    """Create the main area of the right side of page, with the description of the
    demo itself and how to use it.

    Returns:
        the main area

    """
    return el.div(
        [
            el.h1("PyWeb UI Gallery", style={"text-align": "center"}),
            markdown(MAIN_PAGE_MARKDOWN),
        ]
    )


def create_markdown_app():
    """Create the basic components page.

    Returns:
        the main area

    """
    translate_button = shoelace.Button("Convert", variant="primary")
    markdown_txt_area = shoelace.TextArea(label="Use this to write your Markdown")
    result_div = el.div(style=styles.STYLE_MARKDOWN_RESULT)

    @when("click", translate_button)
    def translate_markdown():
        result_div.html = markdown(markdown_txt_area.value).html

    return el.div(
        [
            el.h2("Markdown"),
            markdown_txt_area,
            translate_button,
            result_div,
        ],
        style={"margin": "20px"},
    )


# ********** MAIN PANEL **********
main_area = create_main_area()


def write_to_main(content):
    main_area.html = ""
    main_area.append(content)


def restore_home():
    write_to_main(create_main_area())


def create_new_section(title, parent_div):
    basic_components_text = el.h3(
        title, style={"text-align": "left", "margin": "20px auto 0"}
    )
    parent_div.append(basic_components_text)
    parent_div.append(
        shoelace.Divider(style={"margin-top": "5px", "margin-bottom": "30px"})
    )
    return basic_components_text


# ********** LEFT PANEL **********
left_panel_title = el.h1("PyWeb.UI", style=styles.STYLE_LEFT_PANEL_TITLE)
left_div = el.div(
    [
        left_panel_title,
        shoelace.Divider(style={"margin-bottom": "30px"}),
        el.h3("Demos", style=styles.STYLE_LEFT_PANEL_TITLE),
    ]
)

# Let's map the creation of the main area to when the user clocks on "Components"
when("click", left_panel_title)(restore_home)

# ------ ADD DEMOS ------
markdown_source = """
translate_button = shoelace.Button("Convert", variant="primary")
markdown_txt_area = shoelace.TextArea(label="Markdown",
    help_text="Write your Mardown here and press convert to see the result",
)
result_div = el.div(style=styles.STYLE_MARKDOWN_RESULT)
@when("click", translate_button)
def translate_markdown():
    result_div.html = markdown(markdown_txt_area.value).html

el.div([
    el.h2("Markdown"),
    markdown_txt_area,
    translate_button,
    result_div,
])
"""
add_demo("Markdown", create_markdown_app, left_div, source=markdown_source)
add_demo(
    "Tic Tac Toe",
    tictactoe.create_tic_tac_toe,
    left_div,
    source=inspect.getsource(tictactoe),
)

left_div.append(shoelace.Divider(style={"margin-top": "5px", "margin-bottom": "30px"}))
left_div.append(el.a("Examples", href="/test/ui/", style={"text-align": "left"}))

# ********** CREATE ALL THE LAYOUT **********
grid = el.grid("minmax(100px, 200px) 20px auto", style={"min-height": "100%"})
grid.append(left_div)
grid.append(shoelace.Divider(vertical=True))
grid.append(main_area)

pydom.body.append(grid)
pydom.body.append(el.a("Back to the main page", href="/test/ui/", target="_blank"))
pydom.body.append(el.a("Hidden!!!", href="/test/ui/", target="_blank", hidden=True))