'use client'

import { OfflineBanner } from '@/components/OfflineBanner'
import { Footer } from '@/components/Footer'
import { Header, type CipheraApp, MenuIcon } from '@ciphera-net/ui'
import NotificationCenter from '@/components/notifications/NotificationCenter'
import { useAuth } from '@/lib/auth/context'
import { useOnlineStatus } from '@/lib/hooks/useOnlineStatus'
import Link from 'next/link'
import { useEffect, useState } from 'react'
import { logger } from '@/lib/utils/logger'
import { getUserOrganizations, switchContext, type OrganizationMember } from '@/lib/api/organization'
import { setSessionAction } from '@/app/actions/auth'
import { LoadingOverlay } from '@ciphera-net/ui'
import { useRouter } from 'next/navigation'
import { SettingsModalProvider, useSettingsModal } from '@/lib/settings-modal-context'
import SettingsModalWrapper from '@/components/settings/SettingsModalWrapper'
import { SidebarProvider, useSidebar } from '@/lib/sidebar-context'

const ORG_SWITCH_KEY = 'pulse_switching_org'

// * Available Ciphera apps for the app switcher
const CIPHERA_APPS: CipheraApp[] = [
  {
    id: 'pulse',
    name: 'Pulse',
    description: 'Your current app — Privacy-first analytics',
    icon: 'https://ciphera.net/pulse_icon_no_margins.png',
    href: 'https://pulse.ciphera.net',
    isAvailable: false, // * Current app
  },
  {
    id: 'drop',
    name: 'Drop',
    description: 'Secure file sharing',
    icon: 'https://ciphera.net/drop_icon_no_margins.png',
    href: 'https://drop.ciphera.net',
    isAvailable: true,
  },
  {
    id: 'auth',
    name: 'Auth',
    description: 'Your Ciphera account settings',
    icon: 'https://ciphera.net/auth_icon_no_margins.png',
    href: 'https://auth.ciphera.net',
    isAvailable: true,
  },
]

function MobileSidebarToggle() {
  const { openMobile } = useSidebar()
  return (
    <button
      onClick={openMobile}
      className="lg:hidden p-2 text-neutral-600 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-white transition-colors"
      aria-label="Open navigation"
    >
      <MenuIcon className="w-5 h-5" />
    </button>
  )
}

function LayoutInner({ children }: { children: React.ReactNode }) {
  const auth = useAuth()
  const router = useRouter()
  const isOnline = useOnlineStatus()
  const { openSettings } = useSettingsModal()
  const [orgs, setOrgs] = useState<OrganizationMember[]>([])
  const [isSwitchingOrg, setIsSwitchingOrg] = useState(() => {
    if (typeof window === 'undefined') return false
    return sessionStorage.getItem(ORG_SWITCH_KEY) === 'true'
  })

  // * Clear the switching flag once the page has settled after reload
  useEffect(() => {
    if (isSwitchingOrg) {
      sessionStorage.removeItem(ORG_SWITCH_KEY)
      const timer = setTimeout(() => setIsSwitchingOrg(false), 600)
      return () => clearTimeout(timer)
    }
  }, [isSwitchingOrg])

  // * Fetch organizations for the header organization switcher
  useEffect(() => {
    if (auth.user) {
      getUserOrganizations()
        .then((organizations) => setOrgs(Array.isArray(organizations) ? organizations : []))
        .catch(err => logger.error('Failed to fetch orgs for header', err))
    }
  }, [auth.user])

  const handleSwitchOrganization = async (orgId: string | null) => {
    if (!orgId) return // Pulse doesn't support personal organization context
    try {
      const { access_token } = await switchContext(orgId)
      await setSessionAction(access_token)
      sessionStorage.setItem(ORG_SWITCH_KEY, 'true')
      window.location.reload()
    } catch (err) {
      logger.error('Failed to switch organization', err)
    }
  }

  const handleCreateOrganization = () => {
    router.push('/onboarding')
  }

  const isAuthenticated = !!auth.user
  const showOfflineBar = Boolean(auth.user && !isOnline)

  if (isSwitchingOrg) {
    return <LoadingOverlay logoSrc="/pulse_icon_no_margins.png" title="Pulse" portal={false} />
  }

  const headerElement = (
    <Header
      auth={auth}
      LinkComponent={Link}
      logoSrc="/pulse_icon_no_margins.png"
      appName="Pulse"
      variant={isAuthenticated ? 'static' : 'floating'}
      orgs={orgs}
      activeOrgId={auth.user?.org_id}
      onSwitchOrganization={handleSwitchOrganization}
      onCreateOrganization={handleCreateOrganization}
      allowPersonalOrganization={false}
      showFaq={false}
      showSecurity={false}
      showPricing={true}
      topOffset={!isAuthenticated && showOfflineBar ? '2.5rem' : undefined}
      rightSideActions={auth.user ? <NotificationCenter /> : null}
      apps={CIPHERA_APPS}
      currentAppId="pulse"
      onOpenSettings={openSettings}
      leftActions={isAuthenticated ? <MobileSidebarToggle /> : undefined}
      customNavItems={
        <>
          {!auth.user && (
            <Link
              href="/features"
              className="px-4 py-2 text-sm font-medium text-neutral-600 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-white rounded-lg hover:bg-neutral-100/50 dark:hover:bg-neutral-800/50 transition-all duration-200"
            >
              Features
            </Link>
          )}
        </>
      }
    />
  )

  if (isAuthenticated) {
    // Dashboard layout: header pinned, sidebar + content fill remaining viewport
    return (
      <div className="flex flex-col h-screen overflow-hidden">
        {auth.user && <OfflineBanner isOnline={isOnline} />}
        <div className="shrink-0">{headerElement}</div>
        {children}
        <SettingsModalWrapper />
      </div>
    )
  }

  // Public/marketing layout: floating header, scrollable page, footer
  return (
    <div className="flex flex-col min-h-screen">
      {headerElement}
      <main className="flex-1 pb-8 pt-24">
        {children}
      </main>
      <Footer
        LinkComponent={Link}
        appName="Pulse"
        isAuthenticated={false}
      />
      <SettingsModalWrapper />
    </div>
  )
}

export default function LayoutContent({ children }: { children: React.ReactNode }) {
  return (
    <SettingsModalProvider>
      <SidebarProvider>
        <LayoutInner>{children}</LayoutInner>
      </SidebarProvider>
    </SettingsModalProvider>
  )
}
