import re
import traceback

from django.test import Client
from liveview import liveview_handler, send


def _make_client(consumer):
	client = Client()
	user = consumer.scope.get("user")
	if user and user.is_authenticated:
		client.force_login(user)
	return client


def _extract_main(html):
	match = re.search(r"<main[^>]*>(.*?)</main>", html, re.DOTALL)
	return match.group(1) if match else None


def _inject_liveview_submit(html, url):
	def _replace(match):
		attrs = match.group(1)
		if "data-liveview-function" not in attrs:
			attrs += (
				f' data-liveview-function="submit_modal_form"'
				f' data-action="submit->page#run"'
				f' data-data-url="{url}"'
			)
		return f"<form{attrs}>"

	return re.sub(r"<form([^>]*)>", _replace, html)


def _inject_liveview_submit_page(html, url):
	def _replace(match):
		attrs = match.group(1)
		if "data-liveview-function" not in attrs:
			attrs += (
				f' data-liveview-function="submit_page_form"'
				f' data-action="submit->page#run"'
				f' data-data-url="{url}"'
			)
		return f"<form{attrs}>"

	return re.sub(r"<form([^>]*)>", _replace, html)


def _build_modal(inner_html):
	return f"""
	<div class="modal modal-open">
		<div class="modal-box">
			{inner_html}
		</div>
		<div class="modal-backdrop"
			data-liveview-function="close_modal"
			data-action="click->page#run">
		</div>
	</div>
	"""


def _navigate_to(consumer, client, url):
	try:
		response = client.get(url, follow=True, SERVER_NAME="localhost")
		if response.status_code != 200:
			return

		html_content = response.content.decode("utf-8")
		main_html = _extract_main(html_content)
		if not main_html:
			return

		main_html = _inject_liveview_submit_page(main_html, url)

		title_match = re.search(r"<title>(.*?)</title>", html_content)
		page_title = title_match.group(1) if title_match else "Kakebo"

		send(
			consumer,
			{
				"target": "#main-content",
				"html": main_html,
				"url": url,
				"title": page_title,
			},
		)

	except Exception:
		pass


def _preprocess_form_data(raw):
	processed = {}
	for key, value in raw.items():
		if key == "csrfmiddlewaretoken":
			continue
		if value is True:
			processed[key] = "on"
		elif value is False:
			pass
		else:
			processed[key] = value
	return processed


@liveview_handler("open_modal")
def open_modal(consumer, content):
	url = content.get("data", {}).get("data_url", "/")
	client = _make_client(consumer)

	try:
		response = client.get(url, follow=True, SERVER_NAME="localhost")

		if response.status_code == 200:
			html_content = response.content.decode("utf-8")
			main_html = _extract_main(html_content)

			if main_html:
				main_html = _inject_liveview_submit(main_html, url)
				modal_html = _build_modal(main_html)
				send(consumer, {"target": "#modal-wrapper", "html": modal_html})
			else:
				send(
					consumer,
					{
						"target": "#modal-wrapper",
						"html": _build_modal(
							'<div class="alert alert-error">Could not load content.</div>'
						),
					},
				)
		else:
			send(
				consumer,
				{
					"target": "#modal-wrapper",
					"html": _build_modal(
						f'<div class="alert alert-error">Error {response.status_code}</div>'
					),
				},
			)

	except Exception as e:
		send(
			consumer,
			{
				"target": "#modal-wrapper",
				"html": _build_modal(f'<div class="alert alert-error">{e}</div>'),
			},
		)


@liveview_handler("close_modal")
def close_modal(consumer, content):
	send(consumer, {"target": "#modal-wrapper", "html": ""})


@liveview_handler("submit_modal_form")
def submit_modal_form(consumer, content):
	url = content.get("data", {}).get("data_url", "/")
	raw_form = content.get("form", {})
	form_data = _preprocess_form_data(raw_form)
	client = _make_client(consumer)

	try:
		response = client.post(
			url, data=form_data, follow=False, SERVER_NAME="localhost"
		)

		if response.status_code in (301, 302):
			redirect_url = response.url
			send(consumer, {"target": "#modal-wrapper", "html": ""})
			_navigate_to(consumer, client, redirect_url)

		elif response.status_code == 200:
			html_content = response.content.decode("utf-8")
			main_html = _extract_main(html_content)

			if main_html:
				main_html = _inject_liveview_submit(main_html, url)
				modal_html = _build_modal(main_html)
				send(consumer, {"target": "#modal-wrapper", "html": modal_html})

		else:
			send(
				consumer,
				{
					"target": "#modal-wrapper",
					"html": _build_modal(
						f'<div class="alert alert-error">Error {response.status_code}</div>'
					),
				},
			)

	except Exception as e:
		send(
			consumer,
			{
				"target": "#modal-wrapper",
				"html": _build_modal(
					f'<div class="alert alert-error">{e}<br><pre>{traceback.format_exc()}</pre></div>'
				),
			},
		)


@liveview_handler("submit_page_form")
def submit_page_form(consumer, content):
	url = content.get("data", {}).get("data_url", "/")
	raw_form = content.get("form", {})
	form_data = _preprocess_form_data(raw_form)
	client = _make_client(consumer)

	try:
		response = client.post(
			url, data=form_data, follow=False, SERVER_NAME="localhost"
		)

		if response.status_code in (301, 302):
			redirect_url = response.url
			_navigate_to(consumer, client, redirect_url)

		elif response.status_code == 200:
			html_content = response.content.decode("utf-8")
			main_html = _extract_main(html_content)

			if main_html:
				main_html = _inject_liveview_submit_page(main_html, url)
				send(
					consumer,
					{
						"target": "#main-content",
						"html": main_html,
					},
				)

		else:
			send(
				consumer,
				{
					"target": "#main-content",
					"html": f'<div class="alert alert-error">Error {response.status_code}</div>',
				},
			)

	except Exception as e:
		send(
			consumer,
			{
				"target": "#main-content",
				"html": f'<div class="alert alert-error">{e}<br><pre>{traceback.format_exc()}</pre></div>',
			},
		)