AI task queue

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"use client";

import type { AiTaskRunStatus } from "better-supabase/blocks/ai-tasks";

import { useAction } from "better-supabase/react";
import { CalendarClockIcon, PauseIcon, PlayIcon } from "lucide-react";
import { useExtracted, useFormatter } from "next-intl";
import { useTransition } from "react";
import { toast } from "sonner";

import {
  Alert,
  AlertAction,
  AlertDescription,
  AlertTitle,
} from "@/components/reui/alert";
import { Badge } from "@/components/reui/badge";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardAction,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import {
  Empty,
  EmptyContent,
  EmptyDescription,
  EmptyHeader,
  EmptyMedia,
  EmptyTitle,
} from "@/components/ui/empty";
import { Skeleton } from "@/components/ui/skeleton";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import { useRouter } from "@/i18n/navigation";
import { useErrorMessage } from "@/lib/use-error-message";

import type { AiTaskRow, AiTasksRead } from "../ai-task-queries";

import { scheduleSampleTask, setAiTaskEnabled } from "../ai-task-actions";

function RunStatusBadge({ status }: { status: AiTaskRunStatus | undefined }) {
  const t = useExtracted("aiTasks");

  switch (status) {
    case undefined: {
      return <Badge variant="outline">{t("Not run yet")}</Badge>;
    }

    case "queued": {
      return <Badge variant="info-light">{t("Queued")}</Badge>;
    }

    case "running": {
      return <Badge variant="primary-light">{t("Running")}</Badge>;
    }

    case "completed": {
      return <Badge variant="success-light">{t("Completed")}</Badge>;
    }

    case "failed": {
      return <Badge variant="destructive-light">{t("Failed")}</Badge>;
    }

    default: {
      const unknown: never = status;

      return unknown;
    }
  }
}

function ScheduleSampleButton({ variant }: { variant: "default" | "outline" }) {
  const t = useExtracted("aiTasks");
  const errorMessage = useErrorMessage();

  const schedule = useAction(scheduleSampleTask, {
    onError: (error) => {
      toast.error(errorMessage(error));
    },
  });

  return (
    <Button
      type="button"
      size="sm"
      variant={variant}
      disabled={schedule.pending}
      onClick={() => {
        void schedule.run({});
      }}
    >
      <CalendarClockIcon />
      {t("Schedule a sample task")}
    </Button>
  );
}

function TaskRows({ tasks }: { tasks: readonly AiTaskRow[] }) {
  const t = useExtracted("aiTasks");
  const format = useFormatter();
  const errorMessage = useErrorMessage();

  const toggle = useAction(setAiTaskEnabled, {
    onError: (error) => {
      toast.error(errorMessage(error));
    },
  });

  const when = (iso: string) =>
    format.dateTime(new Date(iso), { dateStyle: "medium", timeStyle: "short" });

  return (
    <Table data-testid="ai-tasks">
      <TableHeader>
        <TableRow>
          <TableHead>{t("Task")}</TableHead>
          <TableHead className="hidden md:table-cell">
            {t("Schedule")}
          </TableHead>
          <TableHead>{t("Next run")}</TableHead>
          <TableHead>{t("Last run")}</TableHead>
          <TableHead>
            <span className="sr-only">{t("Actions")}</span>
          </TableHead>
        </TableRow>
      </TableHeader>
      <TableBody>
        {tasks.map((task) => (
          <TableRow key={task.id}>
            <TableCell className="max-w-72">
              <div className="flex flex-col gap-0.5">
                <span className="truncate font-medium">{task.title}</span>
                <span className="truncate text-xs text-muted-foreground">
                  {task.prompt}
                </span>
              </div>
            </TableCell>
            <TableCell className="hidden md:table-cell">
              <div className="flex flex-col gap-0.5">
                <span className="font-mono text-xs">{task.cron}</span>
                <span className="text-xs text-muted-foreground">
                  {task.timezone}
                </span>
              </div>
            </TableCell>
            <TableCell className="whitespace-nowrap tabular-nums">
              {task.enabled ? (
                task.nextRunAt ? (
                  when(task.nextRunAt)
                ) : (
                  <span className="text-muted-foreground">
                    {t("On the next tick")}
                  </span>
                )
              ) : (
                <Badge variant="secondary">{t("Paused")}</Badge>
              )}
            </TableCell>
            <TableCell>
              <div className="flex flex-col items-start gap-0.5">
                <RunStatusBadge status={task.lastRun?.status} />
                {task.lastRun?.error ? (
                  <span className="max-w-48 truncate text-xs text-muted-foreground">
                    {task.lastRun.error}
                  </span>
                ) : null}
              </div>
            </TableCell>
            <TableCell className="text-right">
              <Button
                type="button"
                variant="ghost"
                size="icon-sm"
                disabled={toggle.pendingInputs.some(
                  (input) => input.id === task.id,
                )}
                aria-label={
                  task.enabled
                    ? t("Pause {title}", { title: task.title })
                    : t("Resume {title}", { title: task.title })
                }
                onClick={() => {
                  void toggle.run({ id: task.id, enabled: !task.enabled });
                }}
              >
                {task.enabled ? <PauseIcon /> : <PlayIcon />}
              </Button>
            </TableCell>
          </TableRow>
        ))}
      </TableBody>
    </Table>
  );
}

/**
 * The caller's scheduled AI tasks, read on the server through `aiTasks.list`,
 * with each task's next occurrence and its latest run. An admin with `ai.admin`
 * sees every task in the organization.
 */
export function AiTaskQueue({ read }: { read: AiTasksRead }) {
  const t = useExtracted("aiTasks");
  const errorMessage = useErrorMessage();
  const router = useRouter();
  const [retrying, startRetry] = useTransition();
  const hasTasks = read.ok && read.tasks.length > 0;

  return (
    <Card data-recipe="ai-task-queue">
      <CardHeader>
        <CardTitle>{t("Scheduled tasks")}</CardTitle>
        <CardDescription>
          {t(
            "Prompts the assistant runs on a cron, with the status of each task's latest run.",
          )}
        </CardDescription>
        {hasTasks ? (
          <CardAction>
            <ScheduleSampleButton variant="outline" />
          </CardAction>
        ) : null}
      </CardHeader>
      <CardContent>
        {read.ok ? (
          read.tasks.length === 0 ? (
            <Empty className="border" data-testid="ai-tasks-empty">
              <EmptyHeader>
                <EmptyMedia variant="icon">
                  <CalendarClockIcon />
                </EmptyMedia>
                <EmptyTitle>{t("No tasks scheduled")}</EmptyTitle>
                <EmptyDescription>
                  {t(
                    "Schedule a prompt to run every weekday at 9:00, then watch its runs here.",
                  )}
                </EmptyDescription>
              </EmptyHeader>
              <EmptyContent>
                <ScheduleSampleButton variant="default" />
              </EmptyContent>
            </Empty>
          ) : (
            <TaskRows tasks={read.tasks} />
          )
        ) : (
          <Alert variant="destructive">
            <AlertTitle>{t("The tasks didn't load")}</AlertTitle>
            <AlertDescription>{errorMessage(read.error)}</AlertDescription>
            <AlertAction>
              <Button
                type="button"
                size="sm"
                variant="outline"
                disabled={retrying}
                onClick={() => {
                  startRetry(() => {
                    router.refresh();
                  });
                }}
              >
                {t("Retry")}
              </Button>
            </AlertAction>
          </Alert>
        )}
      </CardContent>
    </Card>
  );
}

const SKELETON_ROWS = ["first", "second", "third"];

export function AiTaskQueueSkeleton() {
  return (
    <Card aria-busy="true">
      <CardHeader>
        <Skeleton className="h-5 w-40" />
        <Skeleton className="h-4 w-72" />
      </CardHeader>
      <CardContent className="flex flex-col gap-2">
        {SKELETON_ROWS.map((row) => (
          <Skeleton key={row} className="h-11 w-full" />
        ))}
      </CardContent>
    </Card>
  );
}