"use client"

import * as React from "react"
import { SelectTrigger } from "@radix-ui/react-select"
import { type Table } from "@tanstack/react-table"
import {
  ArrowUp,
  CheckCircle2,
  Download,
  Loader,
  Trash2,
  X,
  Mail,
} from "lucide-react"
import { toast } from "sonner"

import { exportTableToExcel } from "@/lib/export"
import { Button } from "@/components/ui/button"
import { Portal } from "@/components/ui/portal"
import {
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
} from "@/components/ui/select"
import { Separator } from "@/components/ui/separator"
import {
  Tooltip,
  TooltipContent,
  TooltipTrigger,
} from "@/components/ui/tooltip"
import { Kbd } from "@/components/kbd"
import { useSession } from "next-auth/react" // next-auth 세션 훅

import { ActionConfirmDialog } from "@/components/ui/action-dialog"
import { VendorCandidatesWithVendorInfo, vendorCandidates } from "@/db/schema/vendors"
import {
  bulkUpdateVendorCandidateStatus,
  removeCandidates,
} from "../service"

/**
 * 테이블 상단/하단에 고정되는 Floating Bar
 * 상태 일괄 변경, 초대, 삭제, Export 등을 수행
 */
interface CandidatesTableFloatingBarProps {
  table: Table<VendorCandidatesWithVendorInfo>
}

export function VendorCandidateTableFloatingBar({
  table,
}: CandidatesTableFloatingBarProps) {
  const rows = table.getFilteredSelectedRowModel().rows
  const { data: session, status } = useSession()

  // React 18의 startTransition 사용 (isPending으로 트랜지션 상태 확인)
  const [isPending, startTransition] = React.useTransition()
  const [action, setAction] = React.useState<
    "update-status" | "export" | "delete" | "invite"
  >()
  const [popoverOpen, setPopoverOpen] = React.useState(false)

  // ESC 키로 selection 해제
  React.useEffect(() => {
    function handleKeyDown(event: KeyboardEvent) {
      if (event.key === "Escape") {
        table.toggleAllRowsSelected(false)
      }
    }
    window.addEventListener("keydown", handleKeyDown)
    return () => window.removeEventListener("keydown", handleKeyDown)
  }, [table])

  // 공용 Confirm Dialog (ActionConfirmDialog) 제어
  const [confirmDialogOpen, setConfirmDialogOpen] = React.useState(false)
  const [confirmProps, setConfirmProps] = React.useState<{
    title: string
    description?: string
    onConfirm: () => Promise<void> | void
  }>({
    title: "",
    description: "",
    onConfirm: () => {},
  })

  /**
   * 1) 삭제 버튼 클릭 시 Confirm Dialog 열기
   */
  function handleDeleteConfirm() {
    setAction("delete")

    setConfirmProps({
      title: `Delete ${rows.length} candidate${
        rows.length > 1 ? "s" : ""
      }?`,
      description: "This action cannot be undone.",
      onConfirm: async () => {
        startTransition(async () => {
          if (!session?.user?.id) {
            toast.error("인증 오류. 로그인 정보를 찾을 수 없습니다.")
            return
          }
          const userId = Number(session.user.id)

          // removeCandidates 호출 시 userId를 넘긴다고 가정
          const { error } = await removeCandidates(
            {
              ids: rows.map((row) => row.original.id),
            },
            userId
          )

          if (error) {
            toast.error(error)
            return
          }
          toast.success("Candidates deleted successfully")
          table.toggleAllRowsSelected(false)
          setConfirmDialogOpen(false)
        })
      },
    })
    setConfirmDialogOpen(true)
  }

  /**
   * 2) 선택된 후보들의 상태 일괄 업데이트
   */
  function handleSelectStatus(newStatus: VendorCandidatesWithVendorInfo["status"]) {
    setAction("update-status")

    setConfirmProps({
      title: `Update ${rows.length} candidate${
        rows.length > 1 ? "s" : ""
      } with status: ${newStatus}?`,
      description: "This action will override their current status.",
      onConfirm: async () => {
        startTransition(async () => {
          if (!session?.user?.id) {
            toast.error("인증 오류. 로그인 정보를 찾을 수 없습니다.")
            return
          }
          const userId = Number(session.user.id)

          const { error } = await bulkUpdateVendorCandidateStatus({
            ids: rows.map((row) => row.original.id),
            status: newStatus,
            userId,
            comment: `Bulk status update to ${newStatus}`,
          })

          if (error) {
            toast.error(error)
            return
          }
          toast.success("Candidates updated")
          setConfirmDialogOpen(false)
          table.toggleAllRowsSelected(false)
        })
      },
    })
    setConfirmDialogOpen(true)
  }

  /**
   * 3) 초대하기 (status = "INVITED" + 이메일 발송)
   */
  function handleInvite() {
    setAction("invite")
    setConfirmProps({
      title: `Invite ${rows.length} candidate${
        rows.length > 1 ? "s" : ""
      }?`,
      description:
        "This will change their status to INVITED and send invitation emails.",
      onConfirm: async () => {
        startTransition(async () => {
          if (!session?.user?.id) {
            toast.error("인증 오류. 로그인 정보를 찾을 수 없습니다.")
            return
          }
          const userId = Number(session.user.id)

          const { error } = await bulkUpdateVendorCandidateStatus({
            ids: rows.map((row) => row.original.id),
            status: "INVITED",
            userId,
            comment: "Bulk invite action",
          })

          if (error) {
            toast.error(error)
            return
          }
          toast.success("Invitation emails sent successfully")
          table.toggleAllRowsSelected(false)
          setConfirmDialogOpen(false)
        })
      },
    })
    setConfirmDialogOpen(true)
  }

  return (
    <>
      {/* 선택된 row가 있을 때 표시되는 Floating Bar */}
      <div className="flex justify-center w-full my-4">
        <div className="flex items-center gap-2 rounded-md border bg-background p-2 text-foreground shadow">
          {/* 선택된 갯수 표시 + Clear selection 버튼 */}
          <div className="flex h-7 items-center rounded-md border border-dashed pl-2.5 pr-1">
            <span className="whitespace-nowrap text-xs">
              {rows.length} selected
            </span>
            <Separator orientation="vertical" className="ml-2 mr-1" />
            <Tooltip>
              <TooltipTrigger asChild>
                <Button
                  variant="ghost"
                  size="icon"
                  className="size-5 hover:border"
                  onClick={() => table.toggleAllRowsSelected(false)}
                >
                  <X className="size-3.5 shrink-0" aria-hidden="true" />
                </Button>
              </TooltipTrigger>
              <TooltipContent className="flex items-center border bg-accent px-2 py-1 font-semibold text-foreground dark:bg-zinc-900">
                <p className="mr-2">Clear selection</p>
                <Kbd abbrTitle="Escape" variant="outline">
                  Esc
                </Kbd>
              </TooltipContent>
            </Tooltip>
          </div>

          <Separator orientation="vertical" className="hidden h-5 sm:block" />

          {/* 우측 액션들: 초대, 상태변경, Export, 삭제 */}
          <div className="flex items-center gap-1.5">
            {/* 초대하기 */}
            <Tooltip>
              <TooltipTrigger asChild>
                <Button
                  variant="secondary"
                  size="sm"
                  className="h-7 border"
                  onClick={handleInvite}
                  disabled={isPending}
                >
                  {isPending && action === "invite" ? (
                    <Loader
                      className="mr-1 size-3.5 animate-spin"
                      aria-hidden="true"
                    />
                  ) : (
                    <Mail className="mr-1 size-3.5" aria-hidden="true" />
                  )}
                  <span>Invite</span>
                </Button>
              </TooltipTrigger>
              <TooltipContent className="border bg-accent font-semibold text-foreground dark:bg-zinc-900">
                <p>Send invitation emails</p>
              </TooltipContent>
            </Tooltip>

            {/* 상태 업데이트 (Select) */}
            <Select
              onValueChange={(value: VendorCandidatesWithVendorInfo["status"]) => {
                handleSelectStatus(value)
              }}
            >
              <Tooltip>
                <SelectTrigger asChild>
                  <TooltipTrigger asChild>
                    <Button
                      variant="secondary"
                      size="icon"
                      className="size-7 border data-[state=open]:bg-accent data-[state=open]:text-accent-foreground"
                      disabled={isPending}
                    >
                      {isPending && action === "update-status" ? (
                        <Loader
                          className="size-3.5 animate-spin"
                          aria-hidden="true"
                        />
                      ) : (
                        <CheckCircle2 className="size-3.5" aria-hidden="true" />
                      )}
                    </Button>
                  </TooltipTrigger>
                </SelectTrigger>
                <TooltipContent className="border bg-accent font-semibold text-foreground dark:bg-zinc-900">
                  <p>Update status</p>
                </TooltipContent>
              </Tooltip>
              <SelectContent align="center">
                <SelectGroup>
                  {vendorCandidates.status.enumValues.map((status) => (
                    <SelectItem
                      key={status}
                      value={status}
                      className="capitalize"
                    >
                      {status}
                    </SelectItem>
                  ))}
                </SelectGroup>
              </SelectContent>
            </Select>

            {/* Export 버튼 */}
            <Tooltip>
              <TooltipTrigger asChild>
                <Button
                  variant="secondary"
                  size="icon"
                  className="size-7 border"
                  onClick={() => {
                    setAction("export")
                    startTransition(() => {
                      exportTableToExcel(table, {
                        excludeColumns: ["select", "actions"],
                        onlySelected: true,
                      })
                    })
                  }}
                  disabled={isPending}
                >
                  {isPending && action === "export" ? (
                    <Loader
                      className="size-3.5 animate-spin"
                      aria-hidden="true"
                    />
                  ) : (
                    <Download className="size-3.5" aria-hidden="true" />
                  )}
                </Button>
              </TooltipTrigger>
              <TooltipContent className="border bg-accent font-semibold text-foreground dark:bg-zinc-900">
                <p>Export candidates</p>
              </TooltipContent>
            </Tooltip>

            {/* 삭제 버튼 */}
            <Tooltip>
              <TooltipTrigger asChild>
                <Button
                  variant="secondary"
                  size="icon"
                  className="size-7 border"
                  onClick={handleDeleteConfirm}
                  disabled={isPending}
                >
                  {isPending && action === "delete" ? (
                    <Loader
                      className="size-3.5 animate-spin"
                      aria-hidden="true"
                    />
                  ) : (
                    <Trash2 className="size-3.5" aria-hidden="true" />
                  )}
                </Button>
              </TooltipTrigger>
              <TooltipContent className="border bg-accent font-semibold text-foreground dark:bg-zinc-900">
                <p>Delete candidates</p>
              </TooltipContent>
            </Tooltip>
          </div>
        </div>
      </div>

      {/* 공용 Confirm Dialog */}
      <ActionConfirmDialog
        open={confirmDialogOpen}
        onOpenChange={setConfirmDialogOpen}
        title={confirmProps.title}
        description={confirmProps.description}
        onConfirm={confirmProps.onConfirm}
        isLoading={
          isPending &&
          (action === "delete" || action === "update-status" || action === "invite")
        }
        confirmLabel={
          action === "delete"
            ? "Delete"
            : action === "update-status"
            ? "Update"
            : action === "invite"
            ? "Invite"
            : "Confirm"
        }
        confirmVariant={action === "delete" ? "destructive" : "default"}
      />
    </>
  )
}