/* eslint-disable @typescript-eslint/no-non-null-assertion */
import { ActionFunctionArgs, LoaderFunctionArgs } from '@remix-run/node'
import { Link as RemixLink, useLoaderData } from '@remix-run/react'
import { InfoIcon, GearIcon, CheckCircleIcon, SkipIcon, PersonIcon } from '@primer/octicons-react'
import { useMemo, useState } from 'react'

import Attribute from '~/components/Attribute'
import Button from '~/components/Button'
import Card from '~/components/Card'
import Menu from '~/components/Menu'
import Tooltip from '~/components/Tooltip'
import StatusCircle from '~/components/StatusCircle'
import { Machine, Route, User } from '~/types'
import { cn } from '~/utils/cn'
import { loadContext } from '~/utils/config/headplane'
import { loadConfig } from '~/utils/config/headscale'
import { pull } from '~/utils/headscale'
import { getSession } from '~/utils/sessions'
import { useLiveData } from '~/utils/useLiveData'
import Link from '~/components/Link'

import { menuAction } from '../_data.machines._index/action'
import MenuOptions from '../_data.machines._index/menu'
import Routes from '../_data.machines._index/dialogs/routes'

export async function loader({ request, params }: LoaderFunctionArgs) {
	const session = await getSession(request.headers.get('Cookie'))
	if (!params.id) {
		throw new Error('No machine ID provided')
	}

	const context = await loadContext()
	let magic: string | undefined

	if (context.config.read) {
		const config = await loadConfig()
		if (config.dns.magic_dns) {
			magic = config.dns.base_domain
		}
	}

	const [machine, routes, users] = await Promise.all([
		pull<{ node: Machine }>(`v1/node/${params.id}`, session.get('hsApiKey')!),
		pull<{ routes: Route[] }>('v1/routes', session.get('hsApiKey')!),
		pull<{ users: User[] }>('v1/user', session.get('hsApiKey')!),
	])

	return {
		machine: machine.node,
		routes: routes.routes.filter(route => route.node.id === params.id),
		users: users.users,
		magic,
	}
}

export async function action({ request }: ActionFunctionArgs) {
	return menuAction(request)
}

export default function Page() {
	const { machine, magic, routes, users } = useLoaderData<typeof loader>()
	const routesState = useState(false)
	useLiveData({ interval: 1000 })

	const expired = machine.expiry === '0001-01-01 00:00:00'
		|| machine.expiry === '0001-01-01T00:00:00Z'
		|| machine.expiry === null
		? false
		: new Date(machine.expiry).getTime() < Date.now()

	const tags = [
		...machine.forcedTags,
		...machine.validTags,
	]

	if (expired) {
		tags.unshift('Expired')
	}

	// This is much easier with Object.groupBy but it's too new for us
	const { exit, subnet, subnetApproved } = routes.reduce((acc, route) => {
		if (route.prefix === '::/0' || route.prefix === '0.0.0.0/0') {
			acc.exit.push(route)
			return acc
		}

		if (route.enabled) {
			acc.subnetApproved.push(route)
			return acc
		}

		acc.subnet.push(route)
		return acc
	}, { exit: [], subnetApproved: [], subnet: [] })

	const exitEnabled = useMemo(() => {
		if (exit.length !== 2) return false
		return exit[0].enabled && exit[1].enabled
	}, [exit])

	if (exitEnabled) {
		tags.unshift('Exit Node')
	}

	if (subnetApproved.length > 0) {
		tags.unshift('Subnets')
	}

	return (
		<div>
			<p className="mb-8 text-md">
				<RemixLink
					to="/machines"
					className="font-medium"
				>
					All Machines
				</RemixLink>
				<span className="mx-2">
					/
				</span>
				{machine.givenName}
			</p>
			<div className={cn(
				'flex justify-between items-center',
				'border-b border-ui-100 dark:border-ui-800',
			)}>
				<span className="flex items-baseline gap-x-4 text-sm mb-4">
					<h1 className="text-2xl font-medium">
						{machine.givenName}
					</h1>
					<StatusCircle isOnline={machine.online} className="w-4 h-4" />
				</span>

				<MenuOptions
					className={cn(
						'bg-ui-100 dark:bg-ui-800',
					)}
					machine={machine}
					routes={routes}
					users={users}
					magic={magic}
					buttonChild={
						<Menu.Button className={cn(
							'flex items-center justify-center gap-x-2',
							'bg-main-200 dark:bg-main-700/30',
							'hover:bg-main-300 dark:hover:bg-main-600/30',
							'text-ui-700 dark:text-ui-300 mb-2',
							'w-fit text-sm rounded-lg px-3 py-2'
						)}>
							<GearIcon className="w-5" />
							Machine Settings
						</Menu.Button>
					}
				/>
			</div>
			<div className="flex gap-1 mb-4">
				<div className="border-r border-ui-100 dark:border-ui-800 p-2 pr-4">
					<span className="text-sm text-ui-600 dark:text-ui-300 flex items-center gap-x-1">
						Managed by
						<Tooltip>
							<Tooltip.Button>
								<InfoIcon className="w-3.5 h-3.5" />
							</Tooltip.Button>
							<Tooltip.Body>
								By default, a machine’s permissions match its creator’s.
							</Tooltip.Body>
						</Tooltip>
					</span>
					<div className="flex items-center gap-x-2.5 mt-1">
						<div className={cn(
							'rounded-full h-7 w-7 flex items-center justify-center',
							'border border-ui-200 dark:border-ui-700',
						)}>
							<PersonIcon className="w-4 h-4" />
						</div>
						{machine.user.name}
					</div>
				</div>
				<div className="p-2 pl-4">
					<p className="text-sm text-ui-600 dark:text-ui-300">
						Status
					</p>
					<div className="flex gap-1 mt-1 mb-8">
						{tags.map(tag => (
							<span
								key={tag}
								className={cn(
									'text-xs rounded-md px-1.5 py-0.5',
									'bg-ui-200 dark:bg-ui-800',
									'text-ui-600 dark:text-ui-300',
								)}
							>
								{tag}
							</span>
						))}
					</div>
				</div>
			</div>
			<h2 className="text-xl font-medium mb-4 mt-8">
				Subnets & Routing
			</h2>
			<Routes
				machine={machine}
				routes={routes}
				state={routesState}
			/>
			<div className="flex items-center justify-between mb-4">
				<p>
					Subnets let you expose physical network routes onto Tailscale.
					{' '}
					<Link
						to="https://tailscale.com/kb/1019/subnets"
						name="Tailscale Subnets Documentation"
					>
						Learn More
					</Link>
				</p>
				<Button
					variant="light"
					control={routesState}
				>
					Review
				</Button>
			</div>
			<Card
				variant="flat"
				className={cn(
					'w-full max-w-full grid sm:grid-cols-2',
					'md:grid-cols-4 gap-8 mr-2 text-sm mb-8',
				)}
			>
				<div>
					<span className="text-ui-600 dark:text-ui-300 flex items-center gap-x-1">
						Approved
						<Tooltip>
							<Tooltip.Button>
								<InfoIcon className="w-3.5 h-3.5" />
							</Tooltip.Button>
							<Tooltip.Body>
								Traffic to these routes are being
								routed through this machine.
							</Tooltip.Body>
						</Tooltip>
					</span>
					<div className="mt-1">
						{subnetApproved.length === 0 ? (
							<span className="text-ui-400 dark:text-ui-300">
								—
							</span>
						) : (
							<ul className="leading-normal">
								{subnetApproved.map(route => (
									<li key={route.id}>
										{route.prefix}
									</li>
								))}
							</ul>
						)}
					</div>
					<Button
						className={cn(
							'p-0 rounded-sm bg-transparent mt-1',
							'text-blue-500 dark:text-blue-400',
							'hover:bg-transparent',
							'hover:text-blue-600 dark:hover:text-blue-500',
						)}
						control={routesState}
					>
						Edit
					</Button>
				</div>
				<div>
					<span className="text-ui-600 dark:text-ui-300 flex items-center gap-x-1">
						Awaiting Approval
						<Tooltip>
							<Tooltip.Button>
								<InfoIcon className="w-3.5 h-3.5" />
							</Tooltip.Button>
							<Tooltip.Body>
								This machine is advertising these routes,
								but they must be approved before traffic
								will be routed to them.
							</Tooltip.Body>
						</Tooltip>
					</span>
					<div className="mt-1">
						{subnet.length === 0 ? (
							<span className="text-ui-400 dark:text-ui-300">
								—
							</span>
						) : (
							<ul className="leading-normal">
								{subnet.map(route => (
									<li key={route.id}>
										{route.prefix}
									</li>
								))}
							</ul>
						)}
					</div>
					<Button
						className={cn(
							'p-0 rounded-sm bg-transparent mt-1',
							'text-blue-500 dark:text-blue-400',
							'hover:bg-transparent',
							'hover:text-blue-600 dark:hover:text-blue-500',
						)}
						control={routesState}
					>
						Edit
					</Button>
				</div>
				<div>
					<span className="text-ui-600 dark:text-ui-300 flex items-center gap-x-1">
						Exit Node
						<Tooltip>
							<Tooltip.Button>
								<InfoIcon className="w-3.5 h-3.5" />
							</Tooltip.Button>
							<Tooltip.Body>
								Whether this machine can act as an
								exit node for your tailnet.
							</Tooltip.Body>
						</Tooltip>
					</span>
					<div className="mt-1">
						{exit.length === 0 ? (
							<span className="text-ui-400 dark:text-ui-300">
								—
							</span>
						) : exitEnabled ? (
							<span className="flex items-center gap-x-1">
								<CheckCircleIcon className="w-3.5 h-3.5 text-green-700" />
								Allowed
							</span>
						) : (
							<span className="flex items-center gap-x-1">
								<SkipIcon className="w-3.5 h-3.5 text-red-700" />
								Awaiting Approval
							</span>
						)}
					</div>
					<Button
						className={cn(
							'p-0 rounded-sm bg-transparent mt-1',
							'text-blue-500 dark:text-blue-400',
							'hover:bg-transparent',
							'hover:text-blue-600 dark:hover:text-blue-500',
						)}
						control={routesState}
					>
						Edit
					</Button>
				</div>
			</Card>
			<h2 className="text-xl font-medium mb-4">
				Machine Details
			</h2>
			<Card variant="flat" className="w-full max-w-full">
				<Attribute name="Creator" value={machine.user.name} />
				<Attribute name="Node ID" value={machine.id} />
				<Attribute name="Node Name" value={machine.givenName} />
				<Attribute name="Hostname" value={machine.name} />
				<Attribute
					isCopyable
					name="Node Key"
					value={machine.nodeKey}
				/>
				<Attribute
					name="Created"
					value={new Date(machine.createdAt).toLocaleString()}
				/>
				<Attribute
					name="Last Seen"
					value={new Date(machine.lastSeen).toLocaleString()}
				/>
				<Attribute
					name="Expiry"
					value={expired
						? new Date(machine.expiry).toLocaleString()
						: 'Never'
					}
				/>
				{magic
					? (
						<Attribute
							isCopyable
							name="Domain"
							value={`${machine.givenName}.${magic}`}
						/>
						)
					: undefined}
			</Card>
		</div>
	)
}