"use client";

import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import {
  Check,
  Download,
  FileText,
  Loader2,
  Pencil,
  Trash2,
  X,
} from "lucide-react";
import { useCallback, useEffect, useMemo, useState } from "react";
import { useParams } from "react-router-dom";
import { toast } from "sonner";

import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { ScrollArea } from "@/components/ui/scroll-area";
import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Textarea } from "@/components/ui/textarea";
import {
  Tooltip,
  TooltipContent,
  TooltipProvider,
  TooltipTrigger,
} from "@/components/ui/tooltip";
import { MarkdownContent } from "@/components/workspace/messages/markdown-content";
import { getBackendBaseURL } from "@/core/config";
import { downloadMarkdownAsDocx } from "@/core/scheduled-tasks/markdown-docx";
import { reasoningPlugins } from "@/core/streamdown";
import { cn } from "@/lib/utils";

type PublicTask = {
  task_id: string;
  name: string;
  description?: string | null;
  schedule_text: string;
  cron_expr?: string;
  timezone: string;
  enabled: boolean;
  next_run_at?: string | null;
  last_run_at?: string | null;
  last_status?: string | null;
  published?: boolean;
};

type PublicRunFile = {
  index: number;
  name: string;
  mime_type?: string | null;
  kind?: string | null;
  size?: number | null;
  /** Server-reported "is the archive file still on disk?" flag. Older responses
   * may omit this — treat missing as available. */
  available?: boolean;
};

type PublicRunResult = {
  title: string;
  content: string;
  format: "markdown" | "text" | "json" | "mixed";
  files: PublicRunFile[];
  created_at: string;
};

type PublicRun = {
  id: string;
  task_id: string;
  scheduled_for: string;
  started_at?: string | null;
  finished_at?: string | null;
  status: "pending" | "running" | "succeeded" | "failed" | string;
  error?: string | null;
  result?: PublicRunResult | null;
  retry_count?: number | null;
  created_at?: string | null;
  updated_at?: string | null;
};

type PublicRunsResponse = {
  task: PublicTask;
  total: number;
  runs: PublicRun[];
};

type PublicFileContent = {
  index: number;
  name: string;
  mime_type?: string | null;
  kind?: string | null;
  size?: number | null;
  previewable: boolean;
  content?: string | null;
};

function publicBaseUrl() {
  return `${getBackendBaseURL()}/api/public/scheduled-tasks`;
}

async function fetchJson<T>(url: string, init?: RequestInit): Promise<T> {
  const response = await fetch(url, init);
  if (!response.ok) {
    const body = await response.json().catch(() => ({ detail: "Request failed" }));
    throw new Error(typeof body.detail === "string" ? body.detail : "Request failed");
  }
  return response.json() as Promise<T>;
}

async function fetchPublicTaskRuns(taskId: string): Promise<PublicRunsResponse> {
  return fetchJson<PublicRunsResponse>(`${publicBaseUrl()}/${encodeURIComponent(taskId)}/runs?limit=200`);
}

async function fetchPublicRunFile(runId: string, index: number): Promise<PublicFileContent> {
  return fetchJson<PublicFileContent>(
    `${publicBaseUrl()}/runs/${encodeURIComponent(runId)}/files/${index}`,
  );
}

async function updatePublicRunFile(
  runId: string,
  index: number,
  content: string,
): Promise<void> {
  await fetchJson(
    `${publicBaseUrl()}/runs/${encodeURIComponent(runId)}/files/${index}`,
    {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ content }),
    },
  );
}

async function updatePublicRunBody(runId: string, content: string): Promise<void> {
  await fetchJson(
    `${publicBaseUrl()}/runs/${encodeURIComponent(runId)}/body`,
    {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ content }),
    },
  );
}

async function deletePublicRun(runId: string): Promise<void> {
  const response = await fetch(
    `${publicBaseUrl()}/runs/${encodeURIComponent(runId)}`,
    { method: "DELETE" },
  );
  if (!response.ok && response.status !== 204) {
    const body = await response.json().catch(() => ({ detail: "Request failed" }));
    throw new Error(typeof body.detail === "string" ? body.detail : "Request failed");
  }
}

function publicRunFileDownloadUrl(runId: string, index: number): string {
  return `${publicBaseUrl()}/runs/${encodeURIComponent(runId)}/files/${index}/download`;
}

function statusLabel(status?: string | null) {
  switch (status) {
    case "succeeded":
      return "成功";
    case "failed":
      return "失败";
    case "running":
      return "执行中";
    case "pending":
      return "等待中";
    default:
      return status || "未知";
  }
}

function statusVariant(status?: string | null): "default" | "secondary" | "destructive" | "outline" {
  if (status === "succeeded") return "default";
  if (status === "failed") return "destructive";
  if (status === "running") return "secondary";
  return "outline";
}

function formatDate(value?: string | null): string {
  return value ? new Date(value).toLocaleString() : "暂无";
}

function isMarkdownFile(file: { name: string; kind?: string | null; mime_type?: string | null }): boolean {
  const name = file.name.toLowerCase();
  return (
    file.kind === "markdown" ||
    file.mime_type === "text/markdown" ||
    name.endsWith(".md") ||
    name.endsWith(".markdown")
  );
}

function isFileAvailable(file: PublicRunFile): boolean {
  // Older responses omit `available`; treat that as still available so we
  // don't accidentally hide content from a backend that hasn't shipped the
  // flag yet.
  return file.available !== false;
}

function stripExtension(name: string): string {
  if (!name) return name;
  const dot = name.lastIndexOf(".");
  if (dot <= 0) return name;
  return name.slice(0, dot);
}

/**
 * Strip a trailing ` - YYYY-MM-DD HH:MM[:SS]` (or `_YYYY-MM-DD ...`) suffix
 * that the agent appends to run titles. The scheduled-for column is already
 * displayed separately below the title, so the duplicated date looks like noise.
 */
function stripTimestampSuffix(title: string): string {
  if (!title) return title;
  const cleaned = title.replace(
    /[\s_]*[-_]?\s*\d{4}-\d{1,2}-\d{1,2}[\sT]+\d{1,2}:\d{2}(?::\d{2})?\s*$/,
    "",
  );
  return cleaned.trim() || title;
}

const BODY_TAB_VALUE = "__body__";

/**
 * Public, unauthenticated scheduled-task viewer.
 *
 * URL: `#/public/scheduled-tasks/<task_id>`
 *
 * Left pane lists every run of the task (latest first). Right pane uses tabs
 * to switch between the inline body (`正文`) and each Markdown attachment.
 * Markdown attachments take priority — when they exist, the first one is the
 * default tab. Each tab supports inline editing (saved via the public PUT
 * endpoints) and a per-tab Word download.
 */
export default function PublicScheduledTaskPage() {
  const { taskId } = useParams<{ taskId: string }>();
  const [selectedRunId, setSelectedRunId] = useState<string | null>(null);
  const [pendingDeleteRun, setPendingDeleteRun] = useState<{ id: string; title: string } | null>(null);
  const queryClient = useQueryClient();

  const { data, isLoading, isError, error } = useQuery({
    queryKey: ["public-scheduled-task", taskId],
    queryFn: () => fetchPublicTaskRuns(taskId!),
    enabled: !!taskId,
    retry: false,
    refetchOnWindowFocus: false,
    refetchInterval: 8000,
  });

  const deleteRunMutation = useMutation({
    mutationFn: (runId: string) => deletePublicRun(runId),
    onSuccess: async (_data, runId) => {
      toast.success("已删除");
      if (selectedRunId === runId) {
        setSelectedRunId(null);
      }
      setPendingDeleteRun(null);
      await queryClient.invalidateQueries({ queryKey: ["public-scheduled-task", taskId] });
    },
    onError: (err) => {
      toast.error(err instanceof Error ? err.message : "删除失败");
    },
  });

  // Public viewer only surfaces runs that have actual content to show:
  // pending/running/failed are hidden, and succeeded runs with neither a body
  // nor a Markdown attachment fall out too (nothing to render).
  const runs = useMemo(() => {
    const all = data?.runs ?? [];
    return all.filter((run) => {
      if (run.status !== "succeeded") return false;
      const result = run.result;
      if (!result) return false;
      const hasBody = !!result.content && result.content.trim().length > 0;
      const hasMarkdownFile = (result.files ?? []).some(
        (file) => isMarkdownFile(file) && isFileAvailable(file),
      );
      return hasBody || hasMarkdownFile;
    });
  }, [data]);
  const selectedRun = useMemo(
    () => runs.find((r) => r.id === selectedRunId) ?? null,
    [runs, selectedRunId],
  );

  useEffect(() => {
    if (!selectedRunId && runs.length > 0) {
      setSelectedRunId(runs[0]!.id);
    }
    if (selectedRunId && !runs.some((r) => r.id === selectedRunId) && runs.length > 0) {
      setSelectedRunId(runs[0]!.id);
    }
  }, [runs, selectedRunId]);

  if (!taskId) {
    return (
      <div className="text-muted-foreground flex h-screen items-center justify-center text-sm">
        缺少任务 ID。请使用 <code className="mx-1">/public/scheduled-tasks/&lt;task_id&gt;</code>。
      </div>
    );
  }

  if (isLoading) {
    return (
      <div className="text-muted-foreground flex h-screen items-center justify-center gap-2 text-sm">
        <Loader2 className="size-4 animate-spin" />
        正在加载任务记录...
      </div>
    );
  }

  if (isError) {
    return (
      <div className="text-destructive flex h-screen items-center justify-center text-sm">
        加载失败：{error instanceof Error ? error.message : "未知错误"}
      </div>
    );
  }

  const task = data?.task;

  return (
    <TooltipProvider delayDuration={150}>
      <div className="bg-muted/20 grid h-screen min-h-0 grid-cols-1 gap-4 p-4 xl:grid-cols-[380px_minmax(0,1fr)]">
        <Card className="flex min-h-0 flex-col">
          <CardHeader className="gap-1">
            <div className="flex items-start justify-between gap-2">
              <Tooltip>
                <TooltipTrigger asChild>
                  <CardTitle className="line-clamp-2 text-base leading-snug break-all">
                    {task?.name || "任务"}
                  </CardTitle>
                </TooltipTrigger>
                {task?.name && (
                  <TooltipContent side="bottom" className="max-w-[320px] break-all">
                    {task.name}
                  </TooltipContent>
                )}
              </Tooltip>
              <Badge variant={task?.enabled ? "default" : "secondary"} className="shrink-0">
                {task?.enabled ? "启用" : "暂停"}
              </Badge>
            </div>
            {task?.description && task.description.trim() && (
              <p className="text-muted-foreground line-clamp-3 text-xs leading-relaxed break-all whitespace-pre-wrap">
                {task.description.trim()}
              </p>
            )}
          </CardHeader>
          <CardContent className="min-h-0 flex-1 p-0">
            <ScrollArea className="size-full">
              <div className="flex flex-col gap-2 p-3 pt-0">
                {runs.length === 0 && (
                  <div className="text-muted-foreground rounded-md border p-3 text-sm">
                    暂无可查看的执行记录。
                  </div>
                )}
                {runs.map((run) => {
                  const active = run.id === selectedRunId;
                  const runRunning = run.status === "running" || run.status === "pending";
                  const runTitle = stripTimestampSuffix(
                    run.result?.title || formatDate(run.scheduled_for),
                  );
                  const isDeletingThis =
                    deleteRunMutation.isPending && deleteRunMutation.variables === run.id;
                  return (
                    <div
                      key={run.id}
                      role="button"
                      tabIndex={0}
                      className={cn(
                        "bg-card hover:bg-accent/60 group rounded-md border p-3 text-left transition-colors cursor-pointer focus:outline-none focus-visible:ring-2 focus-visible:ring-ring",
                        active && "border-primary bg-accent",
                      )}
                      onClick={() => setSelectedRunId(run.id)}
                      onKeyDown={(event) => {
                        if (event.key === "Enter" || event.key === " ") {
                          event.preventDefault();
                          setSelectedRunId(run.id);
                        }
                      }}
                    >
                      <div className="flex items-start justify-between gap-2">
                        <div className="min-w-0 flex-1">
                          <Tooltip>
                            <TooltipTrigger asChild>
                              <div
                                className="text-sm leading-snug font-medium break-all"
                                title={runTitle}
                              >
                                {runTitle}
                              </div>
                            </TooltipTrigger>
                            <TooltipContent side="right" className="max-w-[360px] break-all">
                              {runTitle}
                            </TooltipContent>
                          </Tooltip>
                          <div className="text-muted-foreground mt-1 text-xs">
                            执行时间：{formatDate(run.scheduled_for)}
                          </div>
                        </div>
                        <div className="flex shrink-0 items-center gap-1">
                          <Badge
                            variant={statusVariant(run.status)}
                            className={cn(
                              "shrink-0",
                              runRunning && "border-primary/30 bg-primary/10 text-primary",
                            )}
                          >
                            {runRunning && <Loader2 className="size-3 animate-spin" />}
                            {statusLabel(run.status)}
                          </Badge>
                          <Button
                            size="icon"
                            variant="ghost"
                            className="text-muted-foreground hover:text-destructive size-7"
                            disabled={isDeletingThis}
                            onClick={(event) => {
                              event.stopPropagation();
                              setPendingDeleteRun({ id: run.id, title: runTitle });
                            }}
                            title="删除记录"
                          >
                            {isDeletingThis ? (
                              <Loader2 className="size-3.5 animate-spin" />
                            ) : (
                              <Trash2 className="size-3.5" />
                            )}
                          </Button>
                        </div>
                      </div>
                    </div>
                  );
                })}
              </div>
            </ScrollArea>
          </CardContent>
        </Card>

        <Card className="flex min-h-0 flex-col">
          {selectedRun ? (
            <RunDetailPane key={selectedRun.id} run={selectedRun} taskId={taskId} />
          ) : (
            <CardContent className="text-muted-foreground flex h-full items-center justify-center p-6 text-sm">
              请在左侧选择一条执行记录。
            </CardContent>
          )}
        </Card>
      </div>

      <Dialog
        open={pendingDeleteRun !== null}
        onOpenChange={(open) => {
          if (!open && !deleteRunMutation.isPending) {
            setPendingDeleteRun(null);
          }
        }}
      >
        <DialogContent className="sm:max-w-[420px]">
          <DialogHeader>
            <DialogTitle>删除执行记录</DialogTitle>
            <DialogDescription>
              确认删除这条执行记录吗？此操作不可恢复。
            </DialogDescription>
          </DialogHeader>
          {pendingDeleteRun && (
            <div className="bg-muted/40 text-foreground rounded-md border px-3 py-2 text-sm break-all">
              {pendingDeleteRun.title}
            </div>
          )}
          <DialogFooter>
            <Button
              variant="outline"
              onClick={() => setPendingDeleteRun(null)}
              disabled={deleteRunMutation.isPending}
            >
              取消
            </Button>
            <Button
              variant="destructive"
              onClick={() => {
                if (pendingDeleteRun) {
                  deleteRunMutation.mutate(pendingDeleteRun.id);
                }
              }}
              disabled={deleteRunMutation.isPending}
            >
              {deleteRunMutation.isPending ? (
                <Loader2 className="size-4 animate-spin" />
              ) : (
                <Trash2 className="size-4" />
              )}
              删除
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </TooltipProvider>
  );
}

type ContentTab = {
  /** Stable tab identifier — `__body__` for inline content, `file-<index>` for files. */
  value: string;
  /** Short label rendered in the TabsTrigger. */
  label: string;
  /** Distinguishes body vs MD attachment so the editor knows which PUT to call. */
  kind: "body" | "file";
  /** File index (when `kind === "file"`). */
  fileIndex?: number;
  /** Filename for downloads (defaults to the run title for body). */
  fileName?: string;
};

/**
 * Right-pane controller for a single run: builds the tab list (body + MDs),
 * fetches each tab's source text, and hosts the view/edit toggle.
 */
function RunDetailPane({ run, taskId }: { run: PublicRun; taskId: string }) {
  const queryClient = useQueryClient();

  // Skip files whose archive is missing on disk — otherwise the public viewer
  // would render a tab that 404s with "Result file is no longer available".
  const markdownFiles = useMemo(
    () =>
      (run.result?.files ?? []).filter(
        (file) => isMarkdownFile(file) && isFileAvailable(file),
      ),
    [run.result?.files],
  );

  // Tabs: every MD file first (priority per spec), then the inline body.
  const tabs: ContentTab[] = useMemo(() => {
    const list: ContentTab[] = markdownFiles.map((file, idx) => ({
      value: `file-${file.index}`,
      // Show the actual filename without the `.md` suffix — the user explicitly
      // asked for "no '文件' label, just the name without extension".
      label: stripExtension(file.name) || `文件 ${idx + 1}`,
      kind: "file",
      fileIndex: file.index,
      fileName: file.name,
    }));
    list.push({
      value: BODY_TAB_VALUE,
      label: "正文",
      kind: "body",
      fileName: run.result?.title || "scheduled-task-result",
    });
    return list;
  }, [markdownFiles, run.result?.title]);

  const [activeTab, setActiveTab] = useState<string>(tabs[0]?.value ?? BODY_TAB_VALUE);

  // When the run's MD-file set shifts (rare) — fall back to the first tab.
  useEffect(() => {
    if (!tabs.some((t) => t.value === activeTab)) {
      setActiveTab(tabs[0]?.value ?? BODY_TAB_VALUE);
    }
  }, [tabs, activeTab]);

  // Fetch each MD file's text once. Keyed by file index inside the run.
  const [fileTexts, setFileTexts] = useState<Record<number, string>>({});
  const [fileLoading, setFileLoading] = useState<Record<number, boolean>>({});

  const loadFile = useCallback(
    async (fileIndex: number) => {
      setFileLoading((s) => ({ ...s, [fileIndex]: true }));
      try {
        const file = await fetchPublicRunFile(run.id, fileIndex);
        const text = file.previewable && file.content != null ? file.content : "";
        setFileTexts((s) => ({ ...s, [fileIndex]: text }));
      } catch {
        // Race: the archive may have disappeared between list and fetch. Fall
        // back to empty content; the parent filter will drop this tab on the
        // next refetch tick.
        setFileTexts((s) => ({ ...s, [fileIndex]: "" }));
      } finally {
        setFileLoading((s) => ({ ...s, [fileIndex]: false }));
      }
    },
    [run.id],
  );

  // Pull every MD file on first render — keeps tab-switching instant.
  useEffect(() => {
    for (const file of markdownFiles) {
      if (fileTexts[file.index] == null && !fileLoading[file.index]) {
        void loadFile(file.index);
      }
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [markdownFiles, run.id]);

  // Editor state — separate from displayed source so users can cancel.
  const [isEditing, setIsEditing] = useState(false);
  const [draft, setDraft] = useState<string>("");

  const activeTabMeta = useMemo(
    () => tabs.find((t) => t.value === activeTab) ?? tabs[0],
    [tabs, activeTab],
  );
  const activeSource = useMemo(() => {
    if (!activeTabMeta) return "";
    if (activeTabMeta.kind === "body") return run.result?.content ?? "";
    return fileTexts[activeTabMeta.fileIndex!] ?? "";
  }, [activeTabMeta, run.result?.content, fileTexts]);

  // Reset the editor state any time the tab changes underneath us.
  useEffect(() => {
    setIsEditing(false);
    setDraft(activeSource);
  }, [activeTabMeta?.value, activeSource]);

  const saveMutation = useMutation({
    mutationFn: async () => {
      if (!activeTabMeta) return;
      if (activeTabMeta.kind === "body") {
        await updatePublicRunBody(run.id, draft);
      } else {
        await updatePublicRunFile(run.id, activeTabMeta.fileIndex!, draft);
      }
    },
    onSuccess: async () => {
      if (activeTabMeta?.kind === "file") {
        setFileTexts((s) => ({ ...s, [activeTabMeta.fileIndex!]: draft }));
      }
      toast.success("已保存");
      setIsEditing(false);
      // Force a refetch so the left-list run row picks up the change too.
      await queryClient.invalidateQueries({ queryKey: ["public-scheduled-task", taskId] });
    },
    onError: (err) => {
      toast.error(err instanceof Error ? err.message : "保存失败");
    },
  });

  const handleDownloadWord = useCallback(async () => {
    if (!activeTabMeta) return;
    const markdown = isEditing ? draft : activeSource;
    if (!markdown.trim()) {
      toast.error("当前内容为空");
      return;
    }
    const fileName = activeTabMeta.fileName || run.result?.title || "scheduled-task-result";
    const title = activeTabMeta.kind === "body" ? run.result?.title : undefined;
    try {
      await downloadMarkdownAsDocx(markdown, fileName, title);
      toast.success("Word 文件已生成");
    } catch (err) {
      toast.error(err instanceof Error ? err.message : "生成 Word 失败");
    }
  }, [activeTabMeta, draft, isEditing, activeSource, run.result?.title]);

  const isFileTab = activeTabMeta?.kind === "file";
  const fileIndex = activeTabMeta?.fileIndex;
  const fileIsLoading = isFileTab && fileIndex != null ? !!fileLoading[fileIndex] : false;
  const showEmptyHint = !activeSource && !fileIsLoading;

  return (
    <>
      <CardHeader className="flex flex-wrap items-start justify-between gap-2 space-y-0">
        <div className="min-w-0 flex-1">
          <Tooltip>
            <TooltipTrigger asChild>
              <CardTitle className="line-clamp-2 text-base leading-snug break-all">
                {run.result?.title || "执行记录"}
              </CardTitle>
            </TooltipTrigger>
            {run.result?.title && (
              <TooltipContent side="bottom" className="max-w-[420px] break-all">
                {run.result.title}
              </TooltipContent>
            )}
          </Tooltip>
          <p className="text-muted-foreground mt-1 text-xs">
            开始：{formatDate(run.started_at)} · 完成：{formatDate(run.finished_at)}
          </p>
        </div>
        <div className="flex flex-wrap items-center gap-2">
          {isFileTab && fileIndex != null && (
            <a
              className="bg-background hover:bg-accent inline-flex h-9 items-center gap-1 rounded-md border px-3 text-xs"
              href={publicRunFileDownloadUrl(run.id, fileIndex)}
              target="_blank"
              rel="noopener noreferrer"
            >
              <Download className="size-4" />
              下载原文件
            </a>
          )}
          <Button size="sm" variant="outline" onClick={handleDownloadWord}>
            <FileText className="size-4" />
            下载 Word
          </Button>
          {isEditing ? (
            <>
              <Button
                size="sm"
                variant="outline"
                onClick={() => {
                  setIsEditing(false);
                  setDraft(activeSource);
                }}
                disabled={saveMutation.isPending}
              >
                <X className="size-4" />
                取消
              </Button>
              <Button
                size="sm"
                onClick={() => saveMutation.mutate()}
                disabled={saveMutation.isPending}
              >
                {saveMutation.isPending ? (
                  <Loader2 className="size-4 animate-spin" />
                ) : (
                  <Check className="size-4" />
                )}
                保存
              </Button>
            </>
          ) : (
            <Button
              size="sm"
              variant="outline"
              onClick={() => {
                setDraft(activeSource);
                setIsEditing(true);
              }}
              disabled={fileIsLoading}
            >
              <Pencil className="size-4" />
              编辑
            </Button>
          )}
        </div>
      </CardHeader>

      <CardContent className="min-h-0 flex-1 overflow-hidden p-0">
        {tabs.length === 0 ? (
          <div className="text-muted-foreground p-6 text-sm">无可用内容。</div>
        ) : (
          <Tabs
            value={activeTab}
            onValueChange={setActiveTab}
            className="flex h-full min-h-0 flex-col gap-0 px-4 pb-3"
          >
            <TabsList
              variant="line"
              className="bg-card sticky top-0 z-10 h-auto flex-wrap justify-start gap-1 border-b py-1"
            >
              {tabs.map((tab) => (
                <TabsTrigger
                  key={tab.value}
                  value={tab.value}
                  className="data-[state=active]:bg-accent/60 max-w-[220px]"
                  title={tab.label}
                >
                  <span className="truncate">{tab.label}</span>
                </TabsTrigger>
              ))}
            </TabsList>

            <div className="flex min-h-0 flex-1 flex-col pt-3">
              {run.error && (
                <div className="text-destructive border-destructive/30 bg-destructive/5 mb-3 rounded-md border p-2 text-xs">
                  {run.error}
                </div>
              )}
              {fileIsLoading ? (
                <div className="text-muted-foreground flex items-center gap-2 text-sm">
                  <Loader2 className="size-4 animate-spin" />
                  正在加载文件内容...
                </div>
              ) : isEditing ? (
                <Textarea
                  value={draft}
                  onChange={(event) => setDraft(event.target.value)}
                  className="min-h-0 flex-1 resize-none font-mono text-sm"
                  spellCheck={false}
                />
              ) : (
                <ScrollArea className="min-h-0 flex-1">
                  {showEmptyHint ? (
                    <div className="text-muted-foreground rounded-md border p-3 text-sm">
                      无内容。点击「编辑」开始添加。
                    </div>
                  ) : (
                    <MarkdownContent
                      className="max-w-none pr-2"
                      content={activeSource}
                      isLoading={false}
                      remarkPlugins={reasoningPlugins.remarkPlugins}
                      rehypePlugins={reasoningPlugins.rehypePlugins}
                    />
                  )}
                </ScrollArea>
              )}
            </div>
          </Tabs>
        )}
      </CardContent>
    </>
  );
}