import Link from "next/link"
import { fetchQuery } from "convex/nextjs"
import { MessageSquare, Search } from "lucide-react"
import { api } from "@/convex/_generated/api"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import { Input } from "@/components/ui/input"

type PageProps = {
  searchParams: Promise<{
    search?: string
    channel?: "call" | "sms" | "chat" | "unknown"
    status?: "open" | "closed" | "archived"
    page?: string
  }>
}

function formatTimestamp(value?: number) {
  if (!value) {
    return "—"
  }

  return new Date(value).toLocaleString("en-US", {
    month: "short",
    day: "numeric",
    year: "numeric",
    hour: "2-digit",
    minute: "2-digit",
  })
}

export default async function AdminConversationsPage({
  searchParams,
}: PageProps) {
  const params = await searchParams
  const page = Math.max(1, Number.parseInt(params.page || "1", 10) || 1)
  const search = params.search?.trim() || undefined

  const data = await fetchQuery(api.crm.listAdminConversations, {
    search,
    page,
    limit: 25,
    channel: params.channel,
    status: params.status,
  })

  return (
    <div className="container mx-auto px-4 py-8">
      <div className="space-y-8">
        <div className="flex flex-col gap-4 md:flex-row md:items-start md:justify-between">
          <div>
            <h1 className="text-4xl font-bold tracking-tight text-balance">
              Conversations
            </h1>
            <p className="mt-2 text-muted-foreground">
              Unified inbox across backend-owned call and SMS conversation
              threads.
            </p>
          </div>
          <Link href="/admin">
            <Button variant="outline">Back to Admin</Button>
          </Link>
        </div>

        <Card>
          <CardHeader>
            <CardTitle className="flex items-center gap-2">
              <MessageSquare className="h-5 w-5" />
              Conversation Inbox
            </CardTitle>
            <CardDescription>
              Search by contact, conversation preview, phone, email, or external
              ID.
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <form className="grid gap-3 md:grid-cols-[minmax(0,1fr)_170px_170px_auto]">
              <div className="relative">
                <Search className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
                <Input
                  name="search"
                  defaultValue={search || ""}
                  placeholder="Search conversations"
                  className="pl-9"
                />
              </div>
              <select
                name="channel"
                defaultValue={params.channel || ""}
                className="flex h-10 rounded-md border border-input bg-background px-3 py-2 text-sm"
              >
                <option value="">All channels</option>
                <option value="call">Call</option>
                <option value="sms">SMS</option>
                <option value="chat">Chat</option>
                <option value="unknown">Unknown</option>
              </select>
              <select
                name="status"
                defaultValue={params.status || ""}
                className="flex h-10 rounded-md border border-input bg-background px-3 py-2 text-sm"
              >
                <option value="">All statuses</option>
                <option value="open">Open</option>
                <option value="closed">Closed</option>
                <option value="archived">Archived</option>
              </select>
              <Button type="submit">Filter</Button>
            </form>

            <div className="overflow-x-auto">
              <table className="w-full min-w-[1100px] text-sm">
                <thead>
                  <tr className="border-b text-left text-muted-foreground">
                    <th className="py-3 pr-4 font-medium">Conversation</th>
                    <th className="py-3 pr-4 font-medium">Contact</th>
                    <th className="py-3 pr-4 font-medium">Channel</th>
                    <th className="py-3 pr-4 font-medium">Status</th>
                    <th className="py-3 pr-4 font-medium">Messages</th>
                    <th className="py-3 pr-4 font-medium">Recordings</th>
                    <th className="py-3 pr-4 font-medium">Last Activity</th>
                    <th className="py-3 font-medium">Open</th>
                  </tr>
                </thead>
                <tbody>
                  {data.items.length === 0 ? (
                    <tr>
                      <td
                        colSpan={8}
                        className="py-8 text-center text-muted-foreground"
                      >
                        No conversations matched this filter.
                      </td>
                    </tr>
                  ) : (
                    data.items.map((conversation: any) => (
                      <tr
                        key={conversation.id}
                        className="border-b align-top last:border-b-0"
                      >
                        <td className="py-3 pr-4">
                          <div className="font-medium">
                            {conversation.title || "Untitled conversation"}
                          </div>
                          <div className="text-xs text-muted-foreground">
                            {conversation.lastMessagePreview || "No preview yet"}
                          </div>
                        </td>
                        <td className="py-3 pr-4">
                          {conversation.contact ? (
                            <div>
                              <div className="font-medium">
                                {conversation.contact.name}
                              </div>
                              <div className="text-xs text-muted-foreground">
                                {conversation.contact.phone ||
                                  conversation.contact.email ||
                                  "—"}
                              </div>
                            </div>
                          ) : (
                            "—"
                          )}
                        </td>
                        <td className="py-3 pr-4">
                          <Badge variant="outline">{conversation.channel}</Badge>
                        </td>
                        <td className="py-3 pr-4">
                          <Badge variant="secondary">{conversation.status}</Badge>
                        </td>
                        <td className="py-3 pr-4">{conversation.messageCount}</td>
                        <td className="py-3 pr-4">
                          {conversation.recordingCount}
                        </td>
                        <td className="py-3 pr-4">
                          {formatTimestamp(conversation.lastMessageAt)}
                        </td>
                        <td className="py-3">
                          <Link href={`/admin/conversations/${conversation.id}`}>
                            <Button size="sm" variant="outline">
                              View
                            </Button>
                          </Link>
                        </td>
                      </tr>
                    ))
                  )}
                </tbody>
              </table>
            </div>
          </CardContent>
        </Card>
      </div>
    </div>
  )
}

export const metadata = {
  title: "Conversations | Admin",
  description: "View backend-owned Rocky conversation threads",
}