import { useQueryClient } from "@tanstack/react-query";
import type { LogEntry } from "@umt/contracts";
import { Pause, Play, RotateCw, ScrollText, X } from "lucide-react";
import { useEffect, useMemo, useRef, useState } from "react";
import { useSearchParams } from "react-router";
import { agentKeys } from "~/api/agent.ts";
import { type LogParams, type LogStreamStatus, upsertEntries, useLogStream, useLogs } from "~/api/logs.ts";
import { DataTable } from "~/components/console/data-table.tsx";
import { FilterBar, FilterSelect } from "~/components/console/filter-bar.tsx";
import { PageHeader } from "~/components/console/page-header.tsx";
import { useRecordSheet } from "~/components/console/record-sheet.tsx";
import { StatusBadge } from "~/components/console/status-badge.tsx";
import {
  LOG_FILTER_KEYS,
  LOG_LEVEL,
  LOG_LEVELS,
  LOG_SINCE,
  LOG_TYPE_LABEL,
  LOG_TYPES,
  type LogFilterKey,
  type LogFilters,
  logBadge,
  logSubtitle,
  logTitle,
  objectText,
  sinceToFrom,
  TARGET_LABEL,
} from "~/components/logs/labels.ts";
import { AskAgentButton, LogDetailSheet } from "~/components/logs/log-detail.tsx";
import { PlanBoard } from "~/components/schedules/schedule-board.tsx";
import { useLiveTasks } from "~/components/tasks/live.ts";
import { Button } from "~/components/ui/button.tsx";
import { Tabs, TabsList, TabsTrigger } from "~/components/ui/tabs.tsx";
import { formatRelative } from "~/lib/labels.ts";
import { qk } from "~/lib/query-keys.ts";
import { cn, formatDateTime } from "~/lib/utils.ts";

export const meta = () => [{ title: "日志 · UHD 媒体自动化控制台" }];

// 日志(界面第二轮 V 线):任务、定时与自动任务、登录、审计合成一份列表(GET /logs),实时追加(GET /logs/stream);
// 「定时任务」页签是原计划页(定时任务的开关、间隔、立即执行;运行记录回到日志按定时任务筛选)。
// URL:?type= &level= &since= &q= &objectType= &objectId= &system=1 筛选;?log=<id> / ?run=<引擎运行 id> 打开详情;
// ?tab=schedules[&job=] 定时任务页签。

type Tab = "logs" | "schedules";

/** 列表里的时间:今天只写时分秒,其余带月日 */
function shortTime(iso: string): string {
  const d = new Date(iso);
  const pad = (n: number) => String(n).padStart(2, "0");
  const hms = `${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}`;
  const today = new Date();
  return d.toDateString() === today.toDateString() ? hms : `${pad(d.getMonth() + 1)}-${pad(d.getDate())} ${hms}`;
}

const STREAM_LABEL: Record<LogStreamStatus, string> = {
  off: "已暂停",
  connecting: "连接中…",
  open: "实时",
  reconnecting: "重连中…",
};

function StreamState({ status }: { status: LogStreamStatus }) {
  return (
    <span className="inline-flex items-center gap-1.5 text-meta text-muted-foreground" role="status">
      <span
        aria-hidden
        className={cn(
          "inline-block size-2 rounded-full",
          status === "open" ? "animate-pulse bg-success" : status === "off" ? "bg-foreground/30" : "bg-warning",
        )}
      />
      {STREAM_LABEL[status]}
    </span>
  );
}

function LogsView({
  params,
  setParams,
}: {
  params: URLSearchParams;
  setParams: ReturnType<typeof useSearchParams>[1];
}) {
  const qc = useQueryClient();
  useLiveTasks();
  const filters = Object.fromEntries(LOG_FILTER_KEYS.map((k) => [k, params.get(k) ?? ""])) as LogFilters;
  const [keyword, setKeyword] = useState(filters.q);
  const [live, setLive] = useState(true);
  const [selected, setSelected] = useState<Set<string>>(() => new Set());
  const anchor = useRef<string | null>(null);
  // 记录抽屉(console-ia.md §9):日志页的记录参数是 ?log=<日志 id>,任务也可以只给 ?run=<引擎运行 id>
  const sheet = useRecordSheet({ key: "log", scoped: ["run"] });

  const update = (fn: (p: URLSearchParams) => void) =>
    setParams(
      (prev) => {
        const next = new URLSearchParams(prev);
        fn(next);
        return next;
      },
      { replace: true },
    );
  const setFilter = (k: LogFilterKey, v: string) =>
    update((p) => {
      if (v) p.set(k, v);
      else p.delete(k);
    });

  // 关键词输入防抖写进 URL
  // biome-ignore lint/correctness/useExhaustiveDependencies: 只跟输入走
  useEffect(() => {
    const t = setTimeout(() => {
      if (keyword.trim() !== filters.q) setFilter("q", keyword.trim());
    }, 350);
    return () => clearTimeout(t);
  }, [keyword]);

  const from = useMemo(() => sinceToFrom(filters.since), [filters.since]);
  const query: LogParams = {
    type: filters.type || undefined,
    level: filters.level || undefined,
    from,
    q: filters.q || undefined,
    objectType: filters.objectType || undefined,
    objectId: filters.objectId || undefined,
    system: filters.system || undefined,
  };
  const list = useLogs(query);
  const listRows = useMemo(() => list.data?.pages.flatMap((p) => p.items) ?? [], [list.data]);
  // 流:从列表里最新一条之后接着推;时间范围只决定下界,新日志总在范围内
  const stream = useLogStream(query, { enabled: live && !list.isPending, since: listRows[0]?.at ?? null });
  const rows = useMemo(
    () => (stream.entries.length ? upsertEntries(listRows, stream.entries) : listRows),
    [listRows, stream.entries],
  );
  const fresh = useMemo(() => new Set(stream.entries.map((e) => e.id)), [stream.entries]);

  // 筛选变了:清掉选择
  const filterKey = JSON.stringify(query);
  // biome-ignore lint/correctness/useExhaustiveDependencies: 只在筛选变化时清空
  useEffect(() => {
    setSelected(new Set());
    anchor.current = null;
  }, [filterKey]);

  const openId = params.get("log") ?? (params.get("run") ? `engine_run:${params.get("run")}` : null);
  const openEntry = openId ? (rows.find((e) => e.id === openId) ?? null) : null;
  const selectedRows = rows.filter((e) => selected.has(e.id));

  /** 勾选:按住 Shift 选中与上一次勾选之间的一段 */
  const toggle = (e: LogEntry, shift: boolean) => {
    setSelected((prev) => {
      const next = new Set(prev);
      const on = !prev.has(e.id);
      if (shift && anchor.current) {
        const a = rows.findIndex((r) => r.id === anchor.current);
        const b = rows.findIndex((r) => r.id === e.id);
        if (a >= 0 && b >= 0) {
          for (const r of rows.slice(Math.min(a, b), Math.max(a, b) + 1)) {
            if (on) next.add(r.id);
            else next.delete(r.id);
          }
          return next;
        }
      }
      if (on) next.add(e.id);
      else next.delete(e.id);
      return next;
    });
    anchor.current = e.id;
  };

  const filtered = LOG_FILTER_KEYS.some((k) => !!filters[k]);
  const objectChip = filters.objectType || filters.objectId;

  return (
    <>
      <div className="mb-3 flex flex-wrap items-center gap-2">
        <StreamState status={live ? stream.status : "off"} />
        <Button
          variant="outline"
          size="sm"
          onClick={() => setLive((v) => !v)}
          aria-label={live ? "暂停实时" : "继续实时"}
        >
          {live ? <Pause /> : <Play />}
          {live ? "暂停" : "继续"}
        </Button>
        <Button
          variant="outline"
          size="sm"
          onClick={() => {
            stream.clear();
            void qc.invalidateQueries({ queryKey: qk.all("logs") });
          }}
        >
          <RotateCw />
          刷新
        </Button>
        {selected.size ? (
          <span className="ml-auto flex flex-wrap items-center gap-2" data-floating-bar>
            <span className="text-caption text-muted-foreground">已选 {selected.size} 条</span>
            <AskAgentButton entries={selectedRows} />
            <Button variant="ghost" size="sm" onClick={() => setSelected(new Set())}>
              <X />
              清除选择
            </Button>
          </span>
        ) : (
          <span className="ml-auto text-meta text-muted-foreground">勾选日志（按住 Shift 选一段）后可以问智能体</span>
        )}
      </div>

      <FilterBar
        search={{ value: keyword, onChange: setKeyword, placeholder: "搜索标题、错误、对象 ID" }}
        onReset={
          filtered
            ? () => {
                setKeyword("");
                update((p) => {
                  for (const k of LOG_FILTER_KEYS) p.delete(k);
                });
              }
            : undefined
        }
      >
        <FilterSelect
          label="类型"
          value={filters.type}
          onChange={(v) => setFilter("type", v)}
          options={LOG_TYPES.map((value) => ({ value, label: LOG_TYPE_LABEL[value] }))}
        />
        <FilterSelect
          label="结果"
          value={filters.level}
          onChange={(v) => setFilter("level", v)}
          options={LOG_LEVELS.map((value) => ({ value, label: LOG_LEVEL[value].label }))}
        />
        <FilterSelect
          label="时间"
          value={filters.since}
          onChange={(v) => setFilter("since", v)}
          options={LOG_SINCE}
          allLabel="不限"
        />
        <Button
          variant="outline"
          size="sm"
          aria-pressed={filters.system === "1"}
          title="没有业务对象的任务、例行定时任务的成功运行"
          onClick={() => setFilter("system", filters.system === "1" ? "" : "1")}
        >
          {filters.system === "1" ? "隐藏例行记录" : "显示例行记录"}
        </Button>
        {objectChip ? (
          <Button
            variant="outline"
            size="sm"
            title={`${filters.objectType} ${filters.objectId}`}
            onClick={() =>
              update((p) => {
                p.delete("objectType");
                p.delete("objectId");
              })
            }
          >
            {filters.objectType ? (TARGET_LABEL[filters.objectType] ?? filters.objectType) : "对象"}
            {filters.objectId ? <span className="max-w-40 truncate font-mono">{filters.objectId}</span> : null}
            <X />
          </Button>
        ) : null}
      </FilterBar>

      <DataTable<LogEntry>
        paginationKey={filterKey}
        rows={list.isPending ? undefined : rows}
        rowKey={(r) => r.id}
        loading={list.isPending}
        error={list.error}
        onRetry={() => void list.refetch()}
        onRowClick={(r) => sheet.open(r.id)}
        selectedKey={openId}
        hasMore={!!list.hasNextPage}
        onLoadMore={() => list.fetchNextPage()}
        loadingMore={list.isFetchingNextPage}
        empty={{
          icon: ScrollText,
          title: filtered ? "没有符合条件的日志" : "还没有日志",
          description: filtered ? "换个筛选或放宽时间范围。" : "任务运行、定时任务执行、登录和设置修改都会记在这里。",
        }}
        columns={[
          {
            key: "pick",
            header: <span className="sr-only">选择</span>,
            className: "w-8",
            cell: (r) => (
              <input
                type="checkbox"
                aria-label={`选择 ${logTitle(r)}`}
                checked={selected.has(r.id)}
                onClick={(ev) => {
                  ev.stopPropagation();
                  toggle(r, ev.shiftKey);
                }}
                onChange={() => {}}
                className="h-4 w-4 cursor-pointer accent-foreground"
              />
            ),
          },
          {
            key: "at",
            header: "时间",
            cell: (r) => (
              <span
                className={cn(
                  "whitespace-nowrap font-mono text-caption tabular-nums",
                  fresh.has(r.id) ? "text-foreground" : "text-muted-foreground",
                )}
                title={`${formatDateTime(r.at)}（${formatRelative(r.at)}）`}
              >
                {shortTime(r.at)}
              </span>
            ),
          },
          {
            key: "type",
            header: "类型",
            hideBelow: "sm",
            cell: (r) => <span className="whitespace-nowrap text-caption">{LOG_TYPE_LABEL[r.type]}</span>,
          },
          {
            key: "level",
            header: "结果",
            cell: (r) => {
              const b = logBadge(r);
              return <StatusBadge tone={b.tone}>{b.label}</StatusBadge>;
            },
          },
          {
            key: "title",
            header: "摘要",
            cell: (r) => {
              const sub = logSubtitle(r);
              return (
                <div className="min-w-0 max-w-[16rem] sm:max-w-md lg:max-w-xl">
                  <p className="truncate font-medium text-foreground" title={logTitle(r)}>
                    {logTitle(r)}
                  </p>
                  {sub ? (
                    <p
                      className={cn(
                        "truncate text-meta",
                        r.level === "error" ? "text-destructive" : "text-muted-foreground",
                      )}
                      title={sub}
                    >
                      {sub}
                    </p>
                  ) : null}
                </div>
              );
            },
          },
          {
            key: "object",
            header: "对象",
            hideBelow: "lg",
            cell: (r) => {
              const t = objectText(r.object);
              return t ? (
                <span className="block max-w-[14rem] truncate text-caption text-muted-foreground" title={t}>
                  {t}
                </span>
              ) : (
                <span className="text-muted-foreground">—</span>
              );
            },
          },
        ]}
      />
      <LogDetailSheet logId={openId} entry={openEntry} onOpenLog={(id) => sheet.open(id)} onClose={sheet.close} />
    </>
  );
}

export default function LogsPage() {
  const qc = useQueryClient();
  const [params, setParams] = useSearchParams();
  const tab: Tab = params.get("tab") === "schedules" ? "schedules" : "logs";
  return (
    <>
      <PageHeader
        title="日志"
        actions={
          tab === "schedules" ? (
            <Button
              variant="outline"
              size="sm"
              onClick={() => {
                qc.invalidateQueries({ queryKey: qk.all("schedules") });
                qc.invalidateQueries({ queryKey: [...agentKeys.all, "list"] });
              }}
            >
              <RotateCw />
              刷新
            </Button>
          ) : null
        }
      />
      <Tabs
        value={tab}
        onValueChange={(v) =>
          setParams(
            (prev) => {
              const next = new URLSearchParams(prev);
              if (v === "schedules") next.set("tab", "schedules");
              else {
                next.delete("tab");
                next.delete("job");
              }
              return next;
            },
            { replace: true },
          )
        }
      >
        <TabsList>
          <TabsTrigger value="logs">日志</TabsTrigger>
          <TabsTrigger value="schedules">定时任务</TabsTrigger>
        </TabsList>
      </Tabs>
      <div className="mt-4">
        {tab === "schedules" ? (
          <PlanBoard highlightJob={params.get("job") ?? undefined} />
        ) : (
          <LogsView params={params} setParams={setParams} />
        )}
      </div>
    </>
  );
}