import Link from "next/link"

import { CopyInviteButton } from "@/components/admin/copy-invite-button"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table"
import { listInvitations } from "@/lib/db/queries/invitations"
import { getLanguageLabel } from "@/lib/i18n/config"

export const dynamic = "force-dynamic"

function getInviteUrl(token: string) {
  return new URL(`/invite/${token}`, process.env.APP_URL ?? "http://localhost:3000").toString()
}

function getStatusVariant(status: string): "default" | "secondary" | "outline" {
  if (status === "Attending") return "default"
  if (status === "Pending") return "secondary"
  return "outline"
}

export default async function GuestsPage() {
  const invitations = await listInvitations()

  return (
    <div className="space-y-6">
      <div className="flex flex-col gap-4 sm:flex-row sm:items-end sm:justify-between">
        <div>
          <h1 className="text-3xl font-semibold tracking-tight">Guests</h1>
          <p className="text-muted-foreground">
            Manage invitation groups and private invite links.
          </p>
        </div>
        <Button asChild>
          <Link href="/admin/guests/new">Create invitation</Link>
        </Button>
      </div>

      <Card>
        <CardHeader>
          <CardTitle>Invitation list</CardTitle>
          <CardDescription>
            One row per invitation group, household, couple, family, or individual guest.
          </CardDescription>
        </CardHeader>
        <CardContent>
          {invitations.length === 0 ? (
            <div className="flex flex-col items-center justify-center gap-3 rounded-lg border border-dashed p-10 text-center">
              <p className="font-medium">No invitations yet</p>
              <p className="max-w-sm text-sm text-muted-foreground">
                Create the first invitation to generate a private guest link.
              </p>
              <Button asChild>
                <Link href="/admin/guests/new">Create invitation</Link>
              </Button>
            </div>
          ) : (
            <Table>
              <TableHeader>
                <TableRow>
                  <TableHead>Invitation</TableHead>
                  <TableHead>Language</TableHead>
                  <TableHead>Members</TableHead>
                  <TableHead>Status</TableHead>
                  <TableHead>Contact</TableHead>
                  <TableHead className="text-right">Actions</TableHead>
                </TableRow>
              </TableHeader>
              <TableBody>
                {invitations.map((invitation) => {
                  const inviteUrl = getInviteUrl(invitation.token)

                  return (
                    <TableRow key={invitation.id}>
                      <TableCell>
                        <div className="space-y-1">
                          <Button asChild variant="link" className="h-auto p-0 font-medium">
                            <Link href={`/admin/guests/${invitation.id}`}>
                              {invitation.displayName}
                            </Link>
                          </Button>
                          <p className="text-xs text-muted-foreground">
                            Max party size: {invitation.maxPartySize}
                          </p>
                        </div>
                      </TableCell>
                      <TableCell>{getLanguageLabel(invitation.language)}</TableCell>
                      <TableCell>
                        <div className="space-y-1">
                          <p>{invitation.membersCount}</p>
                          <p className="text-xs text-muted-foreground">
                            {invitation.attendingCount} attending · {invitation.pendingCount} pending
                          </p>
                        </div>
                      </TableCell>
                      <TableCell>
                        <Badge variant={getStatusVariant(invitation.derivedStatus)}>
                          {invitation.derivedStatus}
                        </Badge>
                      </TableCell>
                      <TableCell>
                        <div className="space-y-1 text-sm">
                          <p>{invitation.contactEmail ?? "—"}</p>
                          <p className="text-muted-foreground">{invitation.contactPhone ?? "—"}</p>
                        </div>
                      </TableCell>
                      <TableCell>
                        <div className="flex justify-end gap-2">
                          <CopyInviteButton inviteUrl={inviteUrl} />
                          <Button asChild size="sm">
                            <Link href={`/admin/guests/${invitation.id}`}>View</Link>
                          </Button>
                        </div>
                      </TableCell>
                    </TableRow>
                  )
                })}
              </TableBody>
            </Table>
          )}
        </CardContent>
      </Card>
    </div>
  )
}