import Link from "next/link"
import { fetchQuery } from "convex/nextjs"
import { MessageSquare, Phone, 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"
import { ScrollArea } from "@/components/ui/scroll-area"

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

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

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

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

  const date = new Date(value)
  const now = new Date()
  const sameDay = date.toDateString() === now.toDateString()

  return sameDay
    ? date.toLocaleTimeString("en-US", {
        hour: "numeric",
        minute: "2-digit",
      })
    : date.toLocaleDateString("en-US", {
        month: "short",
        day: "numeric",
      })
}

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

  const totalSeconds = Math.max(0, Math.round(value / 1000))
  const minutes = Math.floor(totalSeconds / 60)
  const seconds = totalSeconds % 60
  return `${minutes}:${String(seconds).padStart(2, "0")}`
}

function getSyncMessage(sync: any) {
  if (!sync.ghlConfigured) {
    return "Connect GHL to load contacts and conversations."
  }
  if (sync.stages.conversations.status === "running") {
    return "Conversations are syncing now."
  }
  if (sync.stages.conversations.error) {
    return "Conversations could not be loaded from GHL yet."
  }
  if (!sync.latestSyncAt) {
    return "No conversations yet."
  }
  return "Browse contacts and conversations in one inbox."
}

function getInitials(value?: string) {
  const text = String(value || "").trim()
  if (!text) {
    return "RM"
  }

  const parts = text.split(/\s+/).filter(Boolean)
  if (parts.length === 1) {
    return parts[0].slice(0, 2).toUpperCase()
  }

  return `${parts[0][0] || ""}${parts[1][0] || ""}`.toUpperCase()
}

function buildConversationHref(params: {
  search?: string
  channel?: string
  status?: string
  conversationId?: string
}) {
  const nextParams = new URLSearchParams()
  if (params.search) {
    nextParams.set("search", params.search)
  }
  if (params.channel) {
    nextParams.set("channel", params.channel)
  }
  if (params.status) {
    nextParams.set("status", params.status)
  }
  if (params.conversationId) {
    nextParams.set("conversationId", params.conversationId)
  }

  const query = nextParams.toString()
  return query ? `/admin/conversations?${query}` : "/admin/conversations"
}

export default async function AdminConversationsPage({
  searchParams,
}: PageProps) {
  const params = await searchParams
  const search = params.search?.trim() || undefined

  const data = await fetchQuery(api.crm.listAdminConversations, {
    search,
    page: 1,
    limit: 100,
    channel: params.channel,
    status: params.status,
  })

  const selectedConversationId =
    (params.conversationId &&
      data.items.find((item: any) => item.id === params.conversationId)?.id) ||
    data.items[0]?.id

  const detail = selectedConversationId
    ? await fetchQuery(api.crm.getAdminConversationDetail, {
        conversationId: selectedConversationId,
      })
    : null

  const timeline = detail
    ? [
        ...detail.messages.map((message: any) => ({
          id: `message-${message.id}`,
          type: "message" as const,
          timestamp: message.sentAt || 0,
          message,
        })),
        ...detail.recordings.map((recording: any) => ({
          id: `recording-${recording.id}`,
          type: "recording" as const,
          timestamp: recording.startedAt || recording.endedAt || 0,
          recording,
        })),
      ].sort((a, b) => a.timestamp - b.timestamp)
    : []

  return (
    <div className="container mx-auto px-4 py-8">
      <div className="space-y-6">
        <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">
              Review calls and messages in one inbox.
            </p>
          </div>
          <Link href="/admin">
            <Button variant="outline">Back to Admin</Button>
          </Link>
        </div>

        <Card className="rounded-[2rem]">
          <CardContent className="flex flex-wrap items-center gap-3 px-6 py-4 text-sm text-muted-foreground">
            <Badge variant="outline">{data.sync.overallStatus}</Badge>
            <span>{getSyncMessage(data.sync)}</span>
            <span>Last sync: {formatTimestamp(data.sync.latestSyncAt || undefined)}</span>
          </CardContent>
        </Card>

        <Card className="overflow-hidden rounded-[2rem] p-0">
          <div className="grid min-h-[720px] lg:grid-cols-[360px_minmax(0,1fr)]">
            <div className="border-b bg-white lg:border-b-0 lg:border-r">
              <div className="space-y-4 border-b px-5 py-5">
                <div className="flex items-center gap-2">
                  <MessageSquare className="h-5 w-5 text-muted-foreground" />
                  <div>
                    <h2 className="font-semibold">Conversation Inbox</h2>
                    <p className="text-sm text-muted-foreground">
                      Search and pick a conversation to review.
                    </p>
                  </div>
                </div>

                <form className="space-y-3">
                  <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 contacts or messages"
                      className="pl-9"
                    />
                  </div>
                  <div className="grid grid-cols-[minmax(0,1fr)_minmax(0,1fr)_auto] gap-2">
                    <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>
                  </div>
                </form>
              </div>

              <ScrollArea className="h-[520px] lg:h-[640px]">
                <div className="divide-y">
                  {data.items.length === 0 ? (
                    <div className="px-5 py-8 text-sm text-muted-foreground">
                      {search || params.channel || params.status
                        ? "No conversations matched this search."
                        : getSyncMessage(data.sync)}
                    </div>
                  ) : (
                    data.items.map((conversation: any) => {
                      const isSelected = conversation.id === selectedConversationId
                      return (
                        <Link
                          key={conversation.id}
                          href={buildConversationHref({
                            search,
                            channel: params.channel,
                            status: params.status,
                            conversationId: conversation.id,
                          })}
                          className={[
                            "flex gap-3 px-5 py-4 transition-colors",
                            isSelected
                              ? "bg-primary/5 ring-1 ring-inset ring-primary/20"
                              : "hover:bg-muted/40",
                          ].join(" ")}
                        >
                          <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-muted text-xs font-semibold text-muted-foreground">
                            {getInitials(conversation.displayName)}
                          </div>
                          <div className="min-w-0 flex-1">
                            <div className="flex items-start justify-between gap-3">
                              <div className="min-w-0">
                                <p className="truncate font-medium">
                                  {conversation.displayName}
                                </p>
                                {conversation.secondaryLine ? (
                                  <p className="truncate text-xs text-muted-foreground">
                                    {conversation.secondaryLine}
                                  </p>
                                ) : null}
                              </div>
                              <span className="shrink-0 text-xs text-muted-foreground">
                                {formatSidebarTimestamp(conversation.lastMessageAt)}
                              </span>
                            </div>
                            <p className="mt-2 line-clamp-2 text-sm text-muted-foreground">
                              {conversation.lastMessagePreview ||
                                "No messages or call notes yet."}
                            </p>
                            <div className="mt-3 flex flex-wrap items-center gap-2">
                              <Badge variant="outline">{conversation.channel}</Badge>
                              <Badge variant="secondary">{conversation.status}</Badge>
                              {conversation.recordingCount ? (
                                <Badge variant="outline">
                                  {conversation.recordingCount} recording
                                  {conversation.recordingCount === 1 ? "" : "s"}
                                </Badge>
                              ) : null}
                            </div>
                          </div>
                        </Link>
                      )
                    })
                  )}
                </div>
              </ScrollArea>
            </div>

            <div className="bg-[#faf8f3]">
              {detail ? (
                <div className="flex h-full flex-col">
                  <div className="border-b bg-white px-6 py-5">
                    <div className="flex flex-col gap-4 md:flex-row md:items-start md:justify-between">
                      <div className="space-y-2">
                        <div>
                          <h2 className="text-2xl font-semibold">
                            {detail.contact?.name ||
                              detail.conversation.title ||
                              "Conversation"}
                          </h2>
                          {detail.contact?.secondaryLine ||
                          detail.contact?.email ||
                          detail.contact?.phone ? (
                            <p className="text-sm text-muted-foreground">
                              {detail.contact?.secondaryLine ||
                                detail.contact?.phone ||
                                detail.contact?.email}
                            </p>
                          ) : null}
                        </div>
                        <div className="flex flex-wrap gap-2">
                          <Badge variant="outline">
                            {detail.conversation.channel}
                          </Badge>
                          <Badge variant="secondary">
                            {detail.conversation.status}
                          </Badge>
                          <Badge variant="outline">
                            {timeline.filter((item) => item.type === "message").length}{" "}
                            messages
                          </Badge>
                          {detail.recordings.length ? (
                            <Badge variant="outline">
                              {detail.recordings.length} recording
                              {detail.recordings.length === 1 ? "" : "s"}
                            </Badge>
                          ) : null}
                        </div>
                      </div>
                      <div className="text-sm text-muted-foreground">
                        Last activity:{" "}
                        {formatTimestamp(detail.conversation.lastMessageAt)}
                      </div>
                    </div>
                  </div>

                  <ScrollArea className="h-[520px] px-4 py-5 lg:h-[640px] lg:px-6">
                    <div className="space-y-4 pb-2">
                      {timeline.length === 0 ? (
                        <div className="rounded-2xl border border-dashed bg-white/70 px-6 py-10 text-center text-sm text-muted-foreground">
                          No messages or recordings have been mirrored into this
                          conversation yet.
                        </div>
                      ) : (
                        timeline.map((item: any) => {
                          if (item.type === "recording") {
                            const recording = item.recording
                            return (
                              <div key={item.id} className="max-w-2xl rounded-2xl border bg-white p-4 shadow-sm">
                                <div className="flex items-center gap-2 text-sm font-medium">
                                  <Phone className="h-4 w-4 text-muted-foreground" />
                                  Call recording
                                  <Badge variant="outline" className="ml-2">
                                    {recording.recordingStatus || "recording"}
                                  </Badge>
                                </div>
                                <div className="mt-2 flex flex-wrap gap-4 text-xs text-muted-foreground">
                                  <span>{formatTimestamp(recording.startedAt)}</span>
                                  <span>Duration: {formatDuration(recording.durationMs)}</span>
                                </div>
                                {recording.recordingUrl ? (
                                  <div className="mt-3">
                                    <a
                                      href={recording.recordingUrl}
                                      target="_blank"
                                      className="text-sm font-medium text-primary hover:underline"
                                    >
                                      Open recording
                                    </a>
                                  </div>
                                ) : null}
                                {recording.transcriptionText ? (
                                  <div className="mt-3 rounded-xl border bg-muted/30 p-3 text-sm whitespace-pre-wrap text-foreground/90">
                                    {recording.transcriptionText}
                                  </div>
                                ) : null}
                              </div>
                            )
                          }

                          const message = item.message
                          const isOutbound = message.direction === "outbound"

                          return (
                            <div
                              key={item.id}
                              className={`flex ${isOutbound ? "justify-end" : "justify-start"}`}
                            >
                              <div
                                className={[
                                  "max-w-[85%] rounded-3xl px-4 py-3 shadow-sm",
                                  isOutbound
                                    ? "bg-primary text-primary-foreground"
                                    : "border bg-white",
                                ].join(" ")}
                              >
                                <div className="mb-2 flex items-center gap-2 text-[11px] uppercase tracking-wide opacity-70">
                                  <span>{message.channel}</span>
                                  <span>{message.direction}</span>
                                  {message.status ? <span>{message.status}</span> : null}
                                </div>
                                <p className="whitespace-pre-wrap text-sm leading-6">
                                  {message.body}
                                </p>
                                <div className="mt-2 text-right text-xs opacity-70">
                                  {formatTimestamp(message.sentAt)}
                                </div>
                              </div>
                            </div>
                          )
                        })
                      )}
                    </div>
                  </ScrollArea>
                </div>
              ) : (
                <div className="flex h-full min-h-[520px] items-center justify-center px-6 py-16">
                  <div className="max-w-md text-center">
                    <h2 className="text-2xl font-semibold">No conversation selected</h2>
                    <p className="mt-2 text-sm text-muted-foreground">
                      Choose a conversation from the left to open the full thread.
                    </p>
                  </div>
                </div>
              )}
            </div>
          </div>
        </Card>
      </div>
    </div>
  )
}

export const metadata = {
  title: "Conversations | Admin",
  description: "View Rocky customer conversations",
}