import { useParams } from 'common'
import { ChevronRight, Minus } from 'lucide-react'
import { useRouter } from 'next/router'
import { useState } from 'react'
import { toast } from 'sonner'
import { cn, TableCell, TableRow } from 'ui'
import { ShimmeringLoader } from 'ui-patterns/ShimmeringLoader'

import { DeleteDestination } from './DeleteDestination'
import { DestinationLogo } from './DestinationLogo'
import { DetailSubtext } from './DetailSubtext'
import { PipelineStatePill } from './PipelineStatePill'
import { PipelineStatusName } from './Replication.constants'
import {
  getFormattedLagValue,
  getInitialSyncProgress,
} from './ReplicationPipelineStatus/ReplicationPipelineStatus.utils'
import { RowMenu } from './RowMenu'
import { UpdateVersionModal } from './UpdateVersionModal'
import { useDestinationInformation } from './useDestinationInformation'
import { AlertError } from '@/components/ui/AlertError'
import { useDeleteDestinationPipelineMutation } from '@/data/replication/delete-destination-pipeline-mutation'
import { useReplicationPipelineReplicationStatusQuery } from '@/data/replication/pipeline-replication-status-query'
import { useReplicationPipelineStatusQuery } from '@/data/replication/pipeline-status-query'
import { useReplicationPipelineVersionQuery } from '@/data/replication/pipeline-version-query'
import { useStopPipelineMutation } from '@/data/replication/stop-pipeline-mutation'
import { createNavigationHandler } from '@/lib/navigation'
import {
  PipelineStatusRequestStatus,
  usePipelineRequestStatus,
} from '@/state/replication-pipeline-request-status'
import { type ResponseError } from '@/types'

interface DestinationRowProps {
  destinationId: number
}

export const DestinationRow = ({ destinationId }: DestinationRowProps) => {
  const router = useRouter()
  const { ref: projectRef } = useParams()
  const [showDeleteDestinationForm, setShowDeleteDestinationForm] = useState(false)
  const [isDeleting, setIsDeleting] = useState(false)
  const [showUpdateVersionModal, setShowUpdateVersionModal] = useState(false)

  const { type, statusName, destination, pipeline, pipelineStatus, pipelineFetcher } =
    useDestinationInformation({
      id: destinationId,
    })
  const {
    error: pipelineError,
    isPending: isPipelineLoading,
    isError: isPipelineError,
  } = pipelineFetcher
  const destinationName = destination?.name ?? pipeline?.destination_name ?? ''

  const {
    error: pipelineStatusError,
    isPending: isPipelineStatusLoading,
    isError: isPipelineStatusError,
    isSuccess: isPipelineStatusSuccess,
  } = useReplicationPipelineStatusQuery({
    projectRef,
    pipelineId: pipeline?.id,
  })
  const { getRequestStatus } = usePipelineRequestStatus()
  const requestStatus = pipeline?.id
    ? getRequestStatus(pipeline.id)
    : PipelineStatusRequestStatus.None

  const { mutateAsync: stopPipeline } = useStopPipelineMutation({ onError: () => {} })
  const { mutateAsync: deleteDestinationPipeline } = useDeleteDestinationPipelineMutation({
    onError: () => {},
  })

  // Fetch table-level replication status to surface errors in list view
  const {
    data: replicationStatusData,
    isPending: isReplicationStatusLoading,
    isError: isReplicationStatusError,
  } = useReplicationPipelineReplicationStatusQuery({ projectRef, pipelineId: pipeline?.id }, {})
  const tableStatuses = replicationStatusData?.table_statuses ?? []
  const errorCount = tableStatuses.filter((t) => t.state?.name === 'error').length
  const applyLag = replicationStatusData?.apply_lag
  // Show the byte-based slot lag (WAL the destination hasn't confirmed flushing yet). The
  // time-based flush_lag from pg_stat_replication is routinely NULL for logical slots that are
  // idle or don't report timed feedback, whereas confirmed_flush_lsn_bytes is always populated.
  const lagBytes = applyLag?.confirmed_flush_lsn_bytes
  const lag = getFormattedLagValue('bytes', lagBytes)
  // The lag figure only covers ongoing changes, so it reads as "Caught up" while an initial copy
  // is still running. Say what's actually happening instead.
  const { syncingCount } = getInitialSyncProgress(tableStatuses)
  const isInitialSyncRunning = syncingCount > 0
  const isCaughtUp = lagBytes === 0
  // Hide old table errors while an optimistic lifecycle action is displayed.
  const isPipelineStopped = statusName === PipelineStatusName.STOPPED
  const isTransitioning = requestStatus !== PipelineStatusRequestStatus.None
  const hasTableErrors = errorCount > 0 && !isPipelineStopped && !isTransitioning

  // Check if a newer pipeline version is available (one-time check cached for session)
  const { data: versionData } = useReplicationPipelineVersionQuery({
    projectRef,
    pipelineId: pipeline?.id,
  })
  const hasUpdate = Boolean(versionData?.new_version)

  const handleNavigation = pipeline
    ? createNavigationHandler(`/project/${projectRef}/database/pipelines/${pipeline.id}`, router)
    : undefined

  const onDeleteClick = async () => {
    if (!projectRef) {
      return console.error('Project ref is required')
    }
    if (!pipeline) {
      return toast.error('No pipeline found')
    }

    try {
      setIsDeleting(true)
      await stopPipeline({ projectRef, pipelineId: pipeline.id, waitUntilStopped: true })
      await deleteDestinationPipeline({
        projectRef,
        destinationId: destinationId,
        pipelineId: pipeline.id,
      })
      // Close dialog after successful deletion
      setShowDeleteDestinationForm(false)
      toast.success(`Deleted pipeline "${destinationName}"`)
    } catch (error) {
      toast.error(`Failed to delete pipeline: ${(error as ResponseError).message}`)
    } finally {
      setIsDeleting(false)
    }
  }

  // Five distinct states, so early returns rather than a ternary chain.
  const renderLag = () => {
    if (isReplicationStatusLoading) return <ShimmeringLoader />
    if (isInitialSyncRunning)
      return <span className="text-foreground-light whitespace-nowrap">Initial sync</span>
    if (isReplicationStatusError || !applyLag)
      return (
        <>
          <Minus size={18} className="text-foreground-lighter" aria-hidden />
          <span className="sr-only">Lag unavailable</span>
        </>
      )
    if (isCaughtUp)
      return <span className="text-foreground-light whitespace-nowrap">Caught up</span>
    return <span className="text-foreground-light whitespace-nowrap">{lag.display}</span>
  }

  return (
    <>
      {isPipelineError && (
        <TableRow>
          <TableCell colSpan={6}>
            <AlertError error={pipelineError} subject="Failed to retrieve pipeline information" />
          </TableCell>
        </TableRow>
      )}
      {(isPipelineLoading || pipeline) && (
        <TableRow
          className={cn('relative', pipeline && 'cursor-pointer focus-inset')}
          onClick={handleNavigation}
          onAuxClick={handleNavigation}
          onKeyDown={handleNavigation}
          tabIndex={pipeline ? 0 : undefined}
        >
          <TableCell className="!pr-1">
            {type ? <DestinationLogo type={type} hasErrors={hasTableErrors} /> : null}
          </TableCell>

          <TableCell className="max-w-[180px]">
            {isPipelineLoading && !destinationName ? (
              <ShimmeringLoader />
            ) : (
              <div className="flex flex-col gap-y-0.5">
                <p className="text-sm font-medium text-foreground truncate">
                  {destinationName || type}
                </p>
                {pipeline && (
                  <DetailSubtext className="flex items-center gap-x-1.5">
                    <span>#{pipeline.id}</span>
                    <span aria-hidden>&middot;</span>
                    <span>{type}</span>
                    {hasTableErrors && (
                      <>
                        <span aria-hidden>&middot;</span>
                        <span className="text-destructive">
                          {errorCount} table error{errorCount === 1 ? '' : 's'}
                        </span>
                      </>
                    )}
                  </DetailSubtext>
                )}
              </div>
            )}
          </TableCell>

          <TableCell>
            {isPipelineLoading || !pipeline ? (
              <ShimmeringLoader />
            ) : (
              <PipelineStatePill
                pipelineStatus={pipelineStatus?.status}
                error={pipelineStatusError}
                isLoading={isPipelineStatusLoading}
                isError={isPipelineStatusError}
                isSuccess={isPipelineStatusSuccess}
                requestStatus={requestStatus}
                projectRef={projectRef}
                pipelineId={pipeline?.id}
              />
            )}
          </TableCell>

          <TableCell>
            <div aria-live="polite" aria-atomic="true">
              {isReplicationStatusLoading && <span className="sr-only">Loading lag</span>}
              {renderLag()}
            </div>
          </TableCell>

          <TableCell>
            {isPipelineLoading || !pipeline ? (
              <ShimmeringLoader />
            ) : (
              pipeline.config.publication_name
            )}
          </TableCell>

          <TableCell>
            <div className="flex items-center justify-end gap-x-2">
              {pipeline ? (
                <>
                  <div
                    onClick={(event) => event.stopPropagation()}
                    onAuxClick={(event) => event.stopPropagation()}
                    onKeyDown={(event) => event.stopPropagation()}
                  >
                    <RowMenu
                      destinationId={destinationId}
                      pipeline={pipeline}
                      pipelineStatus={pipelineStatus?.status}
                      error={pipelineStatusError}
                      isLoading={isPipelineStatusLoading}
                      isError={isPipelineStatusError}
                      onDeleteClick={() => setShowDeleteDestinationForm(true)}
                      hasUpdate={hasUpdate}
                      onUpdateClick={() => setShowUpdateVersionModal(true)}
                    />
                  </div>
                  <ChevronRight
                    size={16}
                    strokeWidth={1.5}
                    className="text-foreground-lighter"
                    aria-hidden
                  />
                  <button tabIndex={-1} className="sr-only">
                    Go to pipeline details
                  </button>
                </>
              ) : (
                <ShimmeringLoader className="h-6 w-6 py-0" />
              )}
            </div>
          </TableCell>
        </TableRow>
      )}

      <DeleteDestination
        visible={showDeleteDestinationForm}
        setVisible={setShowDeleteDestinationForm}
        onDelete={onDeleteClick}
        isLoading={isDeleting}
        name={destinationName}
      />

      <UpdateVersionModal
        visible={showUpdateVersionModal}
        pipeline={pipeline}
        onClose={() => setShowUpdateVersionModal(false)}
      />
    </>
  )
}