import { useEffect, useMemo, useState } from 'react'
import { Link } from 'react-router-dom'
import {
  AlertCircle,
  AlertTriangle,
  ArrowRight,
  Building2,
  Check,
  Clock,
  Copy,
  Crown,
  FolderTree,
  Loader2,
  Mail,
  MessageSquareText,
  Palette,
  Plug,
  RefreshCw,
  Server,
  Settings,
  ShieldCheck,
  UserCog,
  Users,
  X,
} from 'lucide-react'
import { PageMeta } from '@/components/common/PageMeta'
import { accountsApi } from '@/api/accounts'
import type { Account, AccountInvite, AccountMember } from '@/types'
import { TransferOwnershipModal } from '@/components/account/TransferOwnershipModal'
import { LeaveAccountModal } from '@/components/account/LeaveAccountModal'
import { DeleteAccountModal } from '@/components/account/DeleteAccountModal'
import { Button } from '@/components/ui/Button'
import { ConfirmButton } from '@/components/common/ConfirmButton'
import { Spinner } from '@/components/common/Spinner'
import { cn } from '@/lib/utils'
import { usePermissions } from '@/hooks/usePermissions'
import { useSubscription } from '@/hooks/useSubscription'
import { useAuthStore } from '@/store/authStore'
import { useUserPreferencesStore } from '@/store/userPreferencesStore'
import { CheckoutButton } from '@/components/subscription/CheckoutButton'
import { toast } from '@/lib/toast'

interface SettingsLinkCardProps {
  to: string
  icon: React.ReactNode
  title: string
  description: string
  badge?: string
}

function SettingsLinkCard({ to, icon, title, description, badge }: SettingsLinkCardProps) {
  return (
    <Link
      to={to}
      className="group rounded-2xl border border-border bg-card p-5 transition-colors hover:border-border-hover"
    >
      <div className="flex items-start justify-between gap-3">
        <div className="flex items-start gap-3">
          <div className="rounded-xl bg-elevated p-2 text-muted-foreground">{icon}</div>
          <div>
            <div className="flex items-center gap-2">
              <h3 className="text-base font-semibold text-foreground">{title}</h3>
              {badge && (
                <span className="rounded-full bg-muted px-2 py-0.5 text-[11px] font-medium text-muted-foreground">
                  {badge}
                </span>
              )}
            </div>
            <p className="mt-1 text-sm text-muted-foreground">{description}</p>
          </div>
        </div>
        <ArrowRight className="h-4 w-4 text-muted-foreground transition-transform group-hover:translate-x-0.5 group-hover:text-foreground" />
      </div>
    </Link>
  )
}

function UsageStat({
  label,
  current,
  max,
}: {
  label: string
  current: number
  max: number | null
}) {
  const isUnlimited = max === null
  const percentage = isUnlimited ? 0 : Math.min((current / max) * 100, 100)
  const isNearLimit = !isUnlimited && percentage >= 80
  const isAtLimit = !isUnlimited && current >= max

  return (
    <div className="rounded-xl border border-border bg-card/50 p-4">
      <p className="text-xs font-medium uppercase tracking-[0.12em] text-muted-foreground">{label}</p>
      <p
        className={cn(
          'mt-2 text-xl font-semibold',
          isAtLimit ? 'text-danger' : isNearLimit ? 'text-warning' : 'text-foreground'
        )}
      >
        {current}
        <span className="ml-1 text-sm font-normal text-muted-foreground">
          / {isUnlimited ? 'Unlimited' : max}
        </span>
      </p>
      {!isUnlimited && (
        <div className="mt-3 h-2 overflow-hidden rounded-full bg-muted">
          <div
            className={cn(
              'h-full rounded-full transition-all',
              isAtLimit ? 'bg-danger' : isNearLimit ? 'bg-warning' : 'bg-primary'
            )}
            style={{ width: `${percentage}%` }}
          />
        </div>
      )}
    </div>
  )
}

function formatShortDate(value: string | null | undefined) {
  if (!value) return 'Never'
  return new Date(value).toLocaleDateString()
}

export function AccountSettingsPage() {
  const { isAccountOwner } = usePermissions()
  const { plan, limits, usage } = useSubscription()
  const { defaultExportFormat, setDefaultExportFormat } = useUserPreferencesStore()
  const subscription = useAuthStore((s) => s.subscription)
  const user = useAuthStore((s) => s.user)
  const refreshUser = useAuthStore((s) => s.fetchUser)

  const [account, setAccount] = useState<Account | null>(null)
  const [members, setMembers] = useState<AccountMember[]>([])
  const [invites, setInvites] = useState<AccountInvite[]>([])
  const [isLoading, setIsLoading] = useState(true)
  const [error, setError] = useState<string | null>(null)
  const [copiedCode, setCopiedCode] = useState(false)

  const [isEditingName, setIsEditingName] = useState(false)
  const [editedName, setEditedName] = useState('')
  const [isSavingName, setIsSavingName] = useState(false)

  const [showTransferModal, setShowTransferModal] = useState(false)
  const [showLeaveModal, setShowLeaveModal] = useState(false)
  const [showDeleteModal, setShowDeleteModal] = useState(false)

  const [inviteEmail, setInviteEmail] = useState('')
  const [inviteRole, setInviteRole] = useState('engineer')
  const [isInviting, setIsInviting] = useState(false)
  const [resendingId, setResendingId] = useState<string | null>(null)

  useEffect(() => {
    loadData()
  }, [])

  const loadData = async () => {
    setIsLoading(true)
    setError(null)
    try {
      const accountData = await accountsApi.getMyAccount()
      setAccount(accountData)
      setEditedName(accountData.name)

      if (isAccountOwner) {
        const [membersData, invitesData] = await Promise.all([
          accountsApi.getMembers(),
          accountsApi.getInvites(),
        ])
        setMembers(membersData)
        setInvites(invitesData)
      }
    } catch (err) {
      setError('Failed to load account information')
      console.error(err)
    } finally {
      setIsLoading(false)
    }
  }

  const pendingInvites = useMemo(() => invites.filter((invite) => !invite.used_at), [invites])
  const ownerMember = useMemo(() => members.find((member) => member.account_role === 'owner') ?? null, [members])


  const handleCopyDisplayCode = async () => {
    if (!account?.display_code) return
    await navigator.clipboard.writeText(account.display_code)
    setCopiedCode(true)
    toast.success('Display code copied')
    setTimeout(() => setCopiedCode(false), 2000)
  }

  const handleSaveName = async () => {
    if (!editedName.trim() || editedName === account?.name) {
      setIsEditingName(false)
      return
    }
    setIsSavingName(true)
    try {
      const updated = await accountsApi.updateMyAccount({ name: editedName.trim() })
      setAccount(updated)
      setIsEditingName(false)
      toast.success('Account name updated')
      await refreshUser()
    } catch (err) {
      toast.error('Failed to update account name')
      console.error('Failed to update account name:', err)
    } finally {
      setIsSavingName(false)
    }
  }

  const handleInvite = async (e: React.FormEvent) => {
    e.preventDefault()
    if (!inviteEmail.trim()) return

    setIsInviting(true)
    try {
      await accountsApi.createInvite({ email: inviteEmail.trim(), role: inviteRole })
      toast.success(`Invitation sent to ${inviteEmail}`)
      setInviteEmail('')
      const invitesData = await accountsApi.getInvites()
      setInvites(invitesData)
    } catch (err) {
      toast.error('Failed to send invitation')
      console.error(err)
    } finally {
      setIsInviting(false)
    }
  }

  const handleResendInvite = async (inviteId: string) => {
    setResendingId(inviteId)
    try {
      await accountsApi.resendInvite(inviteId)
      toast.success('Invite resent with a new code')
      const invitesData = await accountsApi.getInvites()
      setInvites(invitesData)
    } catch {
      toast.error('Failed to resend invite')
    } finally {
      setResendingId(null)
    }
  }

  const handleRemoveMember = async (userId: string) => {
    try {
      await accountsApi.removeMember(userId)
      setMembers((current) => current.filter((member) => member.id !== userId))
      toast.success('Member removed')
      await refreshUser()
    } catch (err) {
      toast.error('Failed to remove member')
      console.error('Failed to remove member:', err)
    }
  }

  if (isLoading) {
    return (
      <div className="flex justify-center py-12">
        <Spinner />
      </div>
    )
  }

  if (error) {
    return (
      <div className="rounded-md border border-danger/20 bg-danger-dim p-4 text-danger">
        <div className="flex items-center gap-2">
          <AlertCircle className="h-5 w-5" />
          {error}
        </div>
      </div>
    )
  }

  const sub = subscription?.subscription

  return (
    <>
      <PageMeta title="Account Settings" />
      <div className="space-y-8">
        <div>
          <h1 className="text-2xl font-bold font-heading text-foreground">Account Management</h1>
          <p className="mt-1 text-muted-foreground">
            Manage your account identity, billing, access, and workspace settings.
          </p>
        </div>

        <div className="grid gap-6 xl:grid-cols-[1.25fr_0.95fr]">
          <section className="space-y-6">
            <div className="rounded-2xl border border-border bg-card p-5 sm:p-6">
              <div className="flex items-center gap-2">
                <Building2 className="h-5 w-5 text-muted-foreground" />
                <h2 className="text-lg font-semibold text-foreground">Account Identity</h2>
              </div>

              <div className="mt-5 space-y-5">
                <div>
                  <label className="block text-sm font-medium text-foreground">Account Name</label>
                  {isEditingName ? (
                    <div className="mt-2 flex items-center gap-2">
                      <input
                        type="text"
                        value={editedName}
                        onChange={(e) => setEditedName(e.target.value)}
                        className={cn(
                          'flex-1 rounded-md border border-border bg-card px-3 py-2',
                          'text-foreground placeholder:text-muted-foreground',
                          'focus:border-primary focus:outline-hidden focus:ring-1 focus:ring-primary/20'
                        )}
                        autoFocus
                        onKeyDown={(e) => {
                          if (e.key === 'Enter') handleSaveName()
                          if (e.key === 'Escape') {
                            setEditedName(account?.name ?? '')
                            setIsEditingName(false)
                          }
                        }}
                      />
                      <Button onClick={handleSaveName} loading={isSavingName} size="icon-sm">
                        <Check className="h-4 w-4" />
                      </Button>
                      <Button
                        variant="secondary"
                        size="icon-sm"
                        onClick={() => {
                          setEditedName(account?.name ?? '')
                          setIsEditingName(false)
                        }}
                      >
                        <X className="h-4 w-4" />
                      </Button>
                    </div>
                  ) : (
                    <div className="mt-2 flex items-center gap-2">
                      <span className="text-sm text-foreground">{account?.name}</span>
                      {isAccountOwner && (
                        <button
                          onClick={() => setIsEditingName(true)}
                          className="rounded px-1.5 py-0.5 text-xs text-muted-foreground transition-colors hover:bg-muted hover:text-foreground"
                        >
                          Edit
                        </button>
                      )}
                    </div>
                  )}
                </div>

                <div className="grid gap-4 sm:grid-cols-2">
                  <div>
                    <label className="block text-sm font-medium text-foreground">Display Code</label>
                    <div className="mt-2 flex items-center gap-2">
                      <code className="rounded-md border border-border bg-card/50 px-3 py-2 font-mono text-sm text-foreground">
                        {account?.display_code}
                      </code>
                      <Button variant="secondary" size="icon-sm" onClick={handleCopyDisplayCode} title="Copy display code">
                        {copiedCode ? <Check className="h-4 w-4" /> : <Copy className="h-4 w-4" />}
                      </Button>
                    </div>
                    <p className="mt-2 text-xs text-muted-foreground">
                      Share this code with teammates so they can join your account during registration.
                    </p>
                  </div>

                  <div>
                    <label className="block text-sm font-medium text-foreground">Account Owner</label>
                    <div className="mt-2 text-sm text-foreground">
                      {ownerMember ? ownerMember.name : user?.account_role === 'owner' ? user.email : 'Owner unavailable'}
                    </div>
                    <p className="mt-2 text-xs text-muted-foreground">
                      {ownerMember?.email ?? 'The owner manages billing, branding, integrations, and membership changes.'}
                    </p>
                  </div>
                </div>

                <div className="grid gap-4 sm:grid-cols-2">
                  <div>
                    <label className="block text-sm font-medium text-foreground">Created</label>
                    <p className="mt-2 text-sm text-muted-foreground">{formatShortDate(account?.created_at)}</p>
                  </div>
                  <div>
                    <label className="block text-sm font-medium text-foreground">Last updated</label>
                    <p className="mt-2 text-sm text-muted-foreground">{formatShortDate(account?.updated_at)}</p>
                  </div>
                </div>
              </div>
            </div>

            <div className="rounded-2xl border border-border bg-card p-5 sm:p-6">
              <div className="flex items-center justify-between gap-3">
                <div>
                  <div className="flex items-center gap-2">
                    <Crown className="h-5 w-5 text-muted-foreground" />
                    <h2 className="text-lg font-semibold text-foreground">Billing & Usage</h2>
                  </div>
                  <p className="mt-1 text-sm text-muted-foreground">
                    Monitor plan status, renewal timing, and current account limits.
                  </p>
                </div>
              </div>

              <div className="mt-5 flex flex-wrap items-center gap-3">
                <span
                  className={cn(
                    'inline-flex items-center gap-1.5 rounded-full px-3 py-1 text-sm font-medium',
                    plan === 'free' && 'bg-muted text-muted-foreground',
                    plan === 'pro' && 'bg-accent-dim text-accent-text',
                    plan === 'team' && 'bg-accent-dim text-accent-text'
                  )}
                >
                  <Crown className="h-3.5 w-3.5" />
                  {plan.charAt(0).toUpperCase() + plan.slice(1)} Plan
                </span>
                {sub && (
                  <span
                    className={cn(
                      'inline-flex rounded-full px-2.5 py-0.5 text-xs font-medium',
                      sub.status === 'active' && 'bg-success-dim text-success',
                      sub.status === 'trialing' && 'bg-info-dim text-info',
                      sub.status === 'past_due' && 'bg-warning-dim text-warning',
                      sub.status === 'canceled' && 'bg-danger-dim text-danger',
                      sub.status === 'orphaned' && 'bg-muted text-muted-foreground'
                    )}
                  >
                    {sub.status.charAt(0).toUpperCase() + sub.status.slice(1).replace('_', ' ')}
                  </span>
                )}
              </div>

              <div className="mt-4 grid gap-4 sm:grid-cols-2">
                <div className="rounded-xl border border-border bg-card/50 p-4">
                  <p className="text-xs font-medium uppercase tracking-[0.12em] text-muted-foreground">Renewal date</p>
                  <p className="mt-2 text-sm text-foreground">
                    {sub?.current_period_end ? new Date(sub.current_period_end).toLocaleDateString() : 'Not scheduled'}
                  </p>
                </div>
                <div className="rounded-xl border border-border bg-card/50 p-4">
                  <p className="text-xs font-medium uppercase tracking-[0.12em] text-muted-foreground">Branding access</p>
                  <p className="mt-2 text-sm text-foreground">
                    {limits?.custom_branding ? 'Included in your plan' : 'Upgrade required'}
                  </p>
                </div>
              </div>

              {limits && usage && (
                <div className="mt-5 grid gap-3 sm:grid-cols-3">
                  <UsageStat label="Flows" current={usage.tree_count} max={limits.max_trees} />
                  <UsageStat label="Sessions / month" current={usage.session_count_this_month} max={limits.max_sessions_per_month} />
                  <UsageStat label="Seats" current={usage.user_count} max={limits.max_users} />
                </div>
              )}

              {plan === 'free' && (
                <div className="mt-5 flex flex-wrap gap-3">
                  <CheckoutButton plan="pro" />
                  <CheckoutButton plan="team" />
                </div>
              )}
              {plan === 'pro' && (
                <div className="mt-5">
                  <CheckoutButton plan="team" />
                </div>
              )}
            </div>

            <div className="rounded-2xl border border-border bg-card p-5 sm:p-6">
              <div className="flex items-center gap-2">
                <ShieldCheck className="h-5 w-5 text-muted-foreground" />
                <h2 className="text-lg font-semibold text-foreground">Access & Security</h2>
              </div>

              <div className="mt-5 grid gap-4 md:grid-cols-2">
                <div className="rounded-xl border border-border bg-card/50 p-4">
                  <p className="text-xs font-medium uppercase tracking-[0.12em] text-muted-foreground">Authentication</p>
                  <p className="mt-2 text-sm text-foreground">
                    {plan === 'team' ? 'Password auth available, SSO can be enabled.' : 'Password-based authentication is active.'}
                  </p>
                  <p className="mt-2 text-xs text-muted-foreground">
                    Use profile settings to update your personal details and sign-in information.
                  </p>
                </div>

                <div className="rounded-xl border border-border bg-card/50 p-4">
                  <p className="text-xs font-medium uppercase tracking-[0.12em] text-muted-foreground">Single Sign-On</p>
                  <p className="mt-2 text-sm text-foreground">
                    {plan === 'team' ? 'Enterprise-ready setup available.' : 'Available on higher-tier account setups.'}
                  </p>
                  <p className="mt-2 text-xs text-muted-foreground">
                    Contact support to configure SAML or OIDC for your organization.
                  </p>
                </div>
              </div>

              {isAccountOwner && (
                <div className="mt-5 rounded-xl border border-border bg-card/50 p-4">
                  <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
                    <div>
                      <p className="text-sm font-medium text-foreground">Need enterprise security controls?</p>
                      <p className="text-sm text-muted-foreground">
                        We can help enable SSO and align account security for larger teams.
                      </p>
                    </div>
                    <a
                      href="mailto:support@resolutionflow.com?subject=SSO%20Setup%20Request"
                      className={cn(
                        'inline-flex items-center gap-2 rounded-lg px-4 py-2 text-sm font-medium',
                        'bg-muted border border-border text-foreground transition-colors hover:border-border-hover'
                      )}
                    >
                      Contact Us
                    </a>
                  </div>
                </div>
              )}
            </div>
          </section>

          <aside className="space-y-6">
            {!isAccountOwner && (
              <div className="rounded-2xl border border-border bg-card/50 p-5">
                <p className="text-sm text-muted-foreground">
                  Membership, invites, branding, and integrations are managed by the account owner. Contact your admin to make changes.
                </p>
              </div>
            )}

            {isAccountOwner && (
              <div className="rounded-2xl border border-border bg-card p-5 sm:p-6">
                <div className="flex items-center gap-2">
                  <Users className="h-5 w-5 text-muted-foreground" />
                  <h2 className="text-lg font-semibold text-foreground">Membership</h2>
                </div>

                {members.length === 0 ? (
                  <p className="mt-4 text-sm text-muted-foreground">No team members yet. Use the invite form below to add your first teammate.</p>
                ) : (
                  <div className="mt-4 space-y-3">
                    {members.map((member) => (
                      <div key={member.id} className="rounded-xl border border-border bg-card/50 p-4">
                        <div className="flex items-start justify-between gap-3">
                          <div>
                            <p className="text-sm font-medium text-foreground">{member.name}</p>
                            <p className="text-xs text-muted-foreground">{member.email}</p>
                            <p className="mt-2 text-xs text-muted-foreground">
                              Last login: {formatShortDate(member.last_login)}
                            </p>
                          </div>
                          <div className="flex items-center gap-2">
                            {!member.is_active && (
                              <span className="rounded-full bg-danger-dim px-2 py-0.5 text-xs text-danger">
                                Inactive
                              </span>
                            )}
                            {member.account_role === 'owner' ? (
                              <span className="rounded-full bg-accent-dim px-2.5 py-0.5 text-xs font-medium text-accent-text">
                                owner
                              </span>
                            ) : (
                              <select
                                value={member.account_role}
                                aria-label={`Role for ${member.name}`}
                                onChange={async (e) => {
                                  try {
                                    const updated = await accountsApi.updateMemberRole(member.id, e.target.value)
                                    setMembers((current) =>
                                      current.map((entry) =>
                                        entry.id === member.id ? { ...entry, account_role: updated.account_role } : entry
                                      )
                                    )
                                    toast.success(`Role updated to ${updated.account_role}`)
                                  } catch {
                                    toast.error('Failed to update role')
                                  }
                                }}
                                className={cn(
                                  'rounded-md border border-border bg-card px-2 py-0.5 text-xs',
                                  'text-foreground focus:border-primary focus:outline-hidden'
                                )}
                              >
                                <option value="engineer">engineer</option>
                                <option value="viewer">viewer</option>
                              </select>
                            )}
                            {member.account_role !== 'owner' && (
                              <ConfirmButton
                                onConfirm={() => handleRemoveMember(member.id)}
                                confirmLabel="Remove?"
                                className="p-1 text-muted-foreground hover:text-danger"
                                confirmClassName="rounded px-1.5 py-0.5 text-xs font-medium text-danger bg-danger-dim"
                                aria-label={`Remove ${member.name}`}
                              >
                                <X className="h-4 w-4" />
                              </ConfirmButton>
                            )}
                          </div>
                        </div>
                      </div>
                    ))}
                  </div>
                )}
              </div>
            )}

            {isAccountOwner && (
              <div className="rounded-2xl border border-border bg-card p-5 sm:p-6">
                <div className="flex items-center gap-2">
                  <Mail className="h-5 w-5 text-muted-foreground" />
                  <h2 className="text-lg font-semibold text-foreground">Invites</h2>
                </div>

                <form onSubmit={handleInvite} className="mt-4 space-y-3">
                  <input
                    type="email"
                    placeholder="Email address"
                    value={inviteEmail}
                    onChange={(e) => setInviteEmail(e.target.value)}
                    required
                    className={cn(
                      'w-full rounded-md border border-border bg-card px-3 py-2',
                      'text-foreground placeholder:text-muted-foreground',
                      'focus:border-primary focus:outline-hidden focus:ring-1 focus:ring-primary/20'
                    )}
                  />
                  <div className="flex gap-3">
                    <select
                      value={inviteRole}
                      onChange={(e) => setInviteRole(e.target.value)}
                      className={cn(
                        'min-w-[140px] rounded-md border border-border bg-card px-3 py-2',
                        'text-foreground focus:border-primary focus:outline-hidden focus:ring-1 focus:ring-primary/20'
                      )}
                    >
                      <option value="engineer">Engineer</option>
                      <option value="viewer">Viewer</option>
                    </select>
                    <Button type="submit" disabled={!inviteEmail.trim()} loading={isInviting} className="flex-1">
                      {isInviting ? 'Sending...' : 'Send Invite'}
                    </Button>
                  </div>
                </form>

                {pendingInvites.length > 0 ? (
                  <div className="mt-5 space-y-3">
                    {pendingInvites.map((invite) => (
                      <div key={invite.id} className="rounded-xl border border-border bg-card/50 p-4">
                        <div className="flex items-start justify-between gap-3">
                          <div>
                            <p className="text-sm font-medium text-foreground">{invite.email}</p>
                            <p className="mt-1 text-xs text-muted-foreground">
                              {invite.expires_at
                                ? `Expires ${new Date(invite.expires_at).toLocaleDateString()}`
                                : 'No expiration'}
                            </p>
                          </div>
                          <div className="flex items-center gap-2">
                            <span className="rounded-full bg-muted px-2.5 py-0.5 text-xs text-muted-foreground">
                              {invite.role}
                            </span>
                            <button
                              onClick={() => handleResendInvite(invite.id)}
                              disabled={resendingId === invite.id}
                              className="p-1 text-muted-foreground hover:text-foreground disabled:opacity-50"
                              aria-label={`Resend invite to ${invite.email}`}
                            >
                              {resendingId === invite.id ? (
                                <Loader2 className="h-4 w-4 animate-spin" />
                              ) : (
                                <RefreshCw className="h-4 w-4" />
                              )}
                            </button>
                          </div>
                        </div>
                      </div>
                    ))}
                  </div>
                ) : (
                  <p className="mt-4 text-sm text-muted-foreground">No pending invites. Use the form above to invite teammates by email.</p>
                )}
              </div>
            )}

            <div className="rounded-2xl border border-border bg-card p-5 sm:p-6">
              <div className="flex items-center gap-2">
                <Settings className="h-5 w-5 text-muted-foreground" />
                <h2 className="text-lg font-semibold text-foreground">Preferences</h2>
              </div>

              <div className="mt-4">
                <label htmlFor="export-format" className="block text-sm font-medium text-foreground">
                  Default Export Format
                </label>
                <p className="text-sm text-muted-foreground">
                  This format will be pre-selected when exporting sessions.
                </p>
                <select
                  id="export-format"
                  value={defaultExportFormat}
                  onChange={(e) => {
                    setDefaultExportFormat(e.target.value as 'markdown' | 'text' | 'html')
                    toast.success('Preference saved')
                  }}
                  className={cn(
                    'mt-2 block w-full rounded-md border border-border bg-card px-3 py-2',
                    'text-sm text-foreground',
                    'focus:border-primary focus:outline-hidden focus:ring-1 focus:ring-primary/20'
                  )}
                >
                  <option value="markdown">Markdown (.md)</option>
                  <option value="text">Plain Text (.txt)</option>
                  <option value="html">HTML (.html)</option>
                </select>
              </div>
            </div>

            <div className="rounded-2xl border border-danger/20 p-5 sm:p-6">
              <div className="flex items-center gap-2">
                <AlertTriangle className="h-5 w-5 text-danger" />
                <h2 className="text-lg font-semibold text-foreground">Danger Zone</h2>
              </div>

              <div className="mt-4 space-y-3">
                {isAccountOwner ? (
                  <>
                    <div className="flex items-center justify-between gap-3 rounded-xl border border-border bg-card/40 p-4">
                      <div>
                        <p className="text-sm font-medium text-foreground">Transfer Ownership</p>
                        <p className="text-xs text-muted-foreground">Make another member the account owner.</p>
                      </div>
                      <Button
                        variant="secondary"
                        size="sm"
                        onClick={() => setShowTransferModal(true)}
                        className="border-warning/30 text-warning hover:bg-warning-dim"
                      >
                        Transfer
                      </Button>
                    </div>
                    <div className="flex items-center justify-between gap-3 rounded-xl border border-border bg-card/40 p-4">
                      <div>
                        <p className="text-sm font-medium text-foreground">Delete Account</p>
                        <p className="text-xs text-muted-foreground">Permanently delete your account and all data.</p>
                      </div>
                      <Button variant="destructive" size="sm" onClick={() => setShowDeleteModal(true)}>
                        Delete
                      </Button>
                    </div>
                  </>
                ) : (
                  <div className="flex items-center justify-between gap-3 rounded-xl border border-border bg-card/40 p-4">
                    <div>
                      <p className="text-sm font-medium text-foreground">Leave Account</p>
                      <p className="text-xs text-muted-foreground">Leave this account and create a personal one.</p>
                    </div>
                    <Button variant="destructive" size="sm" onClick={() => setShowLeaveModal(true)}>
                      Leave
                    </Button>
                  </div>
                )}
              </div>
            </div>
          </aside>
        </div>

        <section className="space-y-4">
          <div>
            <h2 className="text-lg font-semibold text-foreground">Settings Areas</h2>
            <p className="text-sm text-muted-foreground">
              Common account management actions, organized the way most SaaS teams expect to find them.
            </p>
          </div>

          <div className="grid gap-4 lg:grid-cols-2">
            <SettingsLinkCard
              to="/account/profile"
              icon={<UserCog className="h-5 w-5" />}
              title="Profile Settings"
              description="Update your name, email, and personal details."
            />

            {isAccountOwner && (
              <SettingsLinkCard
                to="/account/branding"
                icon={<Palette className="h-5 w-5" />}
                title="Branding"
                description="Customize logo, accent color, and company name."
                badge={limits?.custom_branding ? 'Included' : 'Plan gated'}
              />
            )}

            {isAccountOwner && (
              <SettingsLinkCard
                to="/account/integrations"
                icon={<Plug className="h-5 w-5" />}
                title="Integrations"
                description="Connect PSA and other external systems for your team."
              />
            )}

            {isAccountOwner && (
              <SettingsLinkCard
                to="/account/chat-retention"
                icon={<Clock className="h-5 w-5" />}
                title="Chat Retention"
                description="Control conversation retention and assistant data lifecycle."
              />
            )}

            {isAccountOwner && (
              <SettingsLinkCard
                to="/account/categories"
                icon={<FolderTree className="h-5 w-5" />}
                title="Team Categories"
                description="Manage shared flow categories for your workspace."
              />
            )}

            {isAccountOwner && (
              <SettingsLinkCard
                to="/account/target-lists"
                icon={<Server className="h-5 w-5" />}
                title="Target Lists"
                description="Maintain saved server and device lists for the team."
              />
            )}

            <SettingsLinkCard
              to="/feedback"
              icon={<MessageSquareText className="h-5 w-5" />}
              title="Support & Feedback"
              description="Report bugs, request features, or share product feedback."
            />
          </div>
        </section>

        {showTransferModal && (
          <TransferOwnershipModal
            members={members}
            onClose={() => setShowTransferModal(false)}
            onTransferred={() => {
              setShowTransferModal(false)
              loadData()
            }}
          />
        )}
        {showLeaveModal && account && (
          <LeaveAccountModal accountName={account.name} onClose={() => setShowLeaveModal(false)} />
        )}
        {showDeleteModal && <DeleteAccountModal onClose={() => setShowDeleteModal(false)} />}
      </div>
    </>
  )
}

export default AccountSettingsPage