'use client';

import Link from 'next/link';
import { useParams } from 'next/navigation';
import React from 'react';
import {
  ArrowLeft,
  ArrowRight,
  Boxes,
  FolderOutput,
  ListTree,
  MessageSquare,
  PanelRightOpen,
  Siren,
  Users,
} from 'lucide-react';

import {
  OfficeStatusBadge,
  formatOfficeDuration,
  formatOfficeTime,
  progressPercent,
} from '@/components/office/OfficeShared';
import { OfficePhaserCanvas } from '@/components/office/OfficePhaserCanvas';
import { TaskManagementTabs } from '@/components/task-management/TaskManagementTabs';
import { Button } from '@/components/ui/button';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import {
  Sheet,
  SheetContent,
  SheetDescription,
  SheetHeader,
  SheetTitle,
} from '@/components/ui/sheet';
import { ScrollArea } from '@/components/ui/scroll-area';
import { buildOfficeView, isOfficeTaskTerminal } from '@/lib/office';
import { useChatStore } from '@/lib/store';

function PixelPanel({
  title,
  subtitle,
  children,
  icon: Icon,
}: {
  title: string;
  subtitle?: string;
  children: React.ReactNode;
  icon?: React.ComponentType<{ className?: string }>;
}) {
  return (
    <div className="rounded-none border-4 border-[#0e1119] bg-[#141722] p-4 text-slate-100 shadow-[0_0_0_2px_#1a1b2f_inset]">
      <div className="flex items-center gap-2 font-mono text-sm font-bold uppercase tracking-[0.18em] text-[#fef3c7]">
        {Icon ? <Icon className="h-4 w-4" /> : null}
        {title}
      </div>
      {subtitle ? (
        <div className="mt-2 text-xs text-slate-400">{subtitle}</div>
      ) : null}
      <div className="mt-4">{children}</div>
    </div>
  );
}

function BoardPanel({
  icon: Icon,
  title,
  description,
  children,
}: {
  icon: React.ComponentType<{ className?: string }>;
  title: string;
  description?: string;
  children: React.ReactNode;
}) {
  return (
    <Card className="rounded-none border-4 border-[#0e1119] bg-[#141722] text-slate-100 shadow-[0_0_0_2px_#1a1b2f_inset]">
      <CardHeader className="border-b border-[#262a3d] pb-3">
        <CardTitle className="flex items-center gap-2 text-base text-[#fef3c7]">
          <Icon className="h-4 w-4" />
          {title}
        </CardTitle>
        {description ? <CardDescription className="text-slate-400">{description}</CardDescription> : null}
      </CardHeader>
      <CardContent>{children}</CardContent>
    </Card>
  );
}

export default function OfficeDetailPage() {
  const params = useParams<{ taskId: string }>();
  const taskId = decodeURIComponent(Array.isArray(params?.taskId) ? params.taskId[0] : params?.taskId ?? '');

  const sessions = useChatStore((state) => state.sessions);
  const processRuns = useChatStore((state) => state.processRuns);
  const processEvents = useChatStore((state) => state.processEvents);
  const processArtifacts = useChatStore((state) => state.processArtifacts);

  const office = React.useMemo(
    () => buildOfficeView(taskId, { sessions, processRuns, processEvents, processArtifacts }),
    [processArtifacts, processEvents, processRuns, sessions, taskId]
  );

  const [selectedRunId, setSelectedRunId] = React.useState<string | null>(null);
  const [detailOpen, setDetailOpen] = React.useState(false);

  React.useEffect(() => {
    setSelectedRunId(office?.rootRunId ?? null);
    setDetailOpen(false);
  }, [office?.rootRunId]);

  const selectedTask = React.useMemo(
    () => office?.tasks.find((task) => task.runId === selectedRunId) ?? office?.tasks[0] ?? null,
    [office?.tasks, selectedRunId]
  );

  const selectedEvents = React.useMemo(
    () => processEvents
      .filter((event) => event.run_id === selectedTask?.runId)
      .sort((a, b) => new Date(b.created_at).getTime() - new Date(a.created_at).getTime())
      .slice(0, 8),
    [processEvents, selectedTask?.runId]
  );

  const selectedArtifacts = React.useMemo(
    () => processArtifacts
      .filter((artifact) => artifact.run_id === selectedTask?.runId)
      .sort((a, b) => new Date(b.created_at).getTime() - new Date(a.created_at).getTime()),
    [processArtifacts, selectedTask?.runId]
  );

  const openRunDetail = React.useCallback((runId: string) => {
    setSelectedRunId(runId);
    setDetailOpen(true);
  }, []);

  if (!office) {
    return (
      <div className="mx-auto flex max-w-4xl flex-col gap-4 p-6">
        <Button asChild variant="outline" className="w-fit">
          <Link href="/office">
            <ArrowLeft className="mr-2 h-4 w-4" />
            返回 Office 列表
          </Link>
        </Button>
        <Card className="border-dashed">
          <CardContent className="py-16 text-center">
            <h1 className="text-2xl font-semibold">任务不存在</h1>
            <p className="mt-2 text-sm text-muted-foreground">
              当前 store 中没有这个 task 的运行数据。先从对话页发起任务，或者回到 Office 列表查看当前可用任务。
            </p>
          </CardContent>
        </Card>
      </div>
    );
  }

  const progressValue = progressPercent(office.progress.value, office.progress.max);

  return (
    <div className="mx-auto max-w-[1720px] space-y-6 p-6">
      <TaskManagementTabs />

      <div className="flex flex-wrap items-center gap-3">
        <Button asChild variant="outline" size="sm">
          <Link href="/office">
            <ArrowLeft className="mr-2 h-4 w-4" />
            返回 Office
          </Link>
        </Button>
        <Button asChild variant="ghost" size="sm">
          <Link href="/">
            <MessageSquare className="mr-2 h-4 w-4" />
            回到对话
          </Link>
        </Button>
      </div>

      <div className="space-y-5">
        <div className="mx-auto max-w-[1280px] rounded-none border-4 border-[#0e1119] bg-[#141522] p-4 shadow-[0_0_0_2px_#241d36_inset]">
          <div className="flex flex-col gap-4 lg:flex-row lg:items-start lg:justify-between">
            <div className="min-w-0">
              <div className="flex flex-wrap items-center gap-3">
                <h1 className="truncate font-mono text-3xl font-bold uppercase tracking-[0.18em] text-[#fef3c7]">
                  {office.title}
                </h1>
                <OfficeStatusBadge status={office.status} className="bg-black/20" />
              </div>
              <div className="mt-3 flex flex-wrap items-center gap-x-4 gap-y-2 font-mono text-xs uppercase tracking-[0.14em] text-slate-400">
                <span>Lead: {office.rootActorName}</span>
                <span>Session: {office.sourceSessionLabel}</span>
                <span>Started: {formatOfficeTime(office.createdAt)}</span>
                <span>Duration: {formatOfficeDuration(office.durationMs)}</span>
              </div>
            </div>

            <div className="grid min-w-[320px] gap-3 sm:grid-cols-2 lg:w-[430px]">
              <MetricTile label="运行实例" value={String(office.stats.totalRuns)} />
              <MetricTile label="参与成员" value={String(office.stats.memberCount)} />
              <MetricTile label="产物数量" value={String(office.stats.artifactCount)} />
              <MetricTile label="告警数量" value={String(office.alerts.length)} />
            </div>
          </div>
        </div>

        <div className="mx-auto max-w-[1280px]">
          <OfficePhaserCanvas
            office={office}
            selectedRunId={selectedTask?.runId ?? null}
            onRunSelect={openRunDetail}
            showMetaBar={false}
          />
        </div>

        <div className="mx-auto grid max-w-[1280px] gap-5 xl:grid-cols-[390px_minmax(0,1fr)_390px]">
          <PixelPanel
            title="昨日小记"
            subtitle="用任务摘要、告警和最近更新来替代原版 memo 区。"
          >
            <div className="space-y-3 text-sm leading-6 text-slate-300">
              <div className="rounded-none border-2 border-[#2d3348] bg-[#0f1420] px-3 py-3">
                {selectedTask?.summary || '当前选中任务没有摘要，先从右侧任务看板切一个具体 run 看现场。'}
              </div>
              {office.alerts.slice(0, 2).map((alert) => (
                <button
                  key={alert.id}
                  type="button"
                  disabled={!alert.runId}
                  onClick={() => alert.runId && openRunDetail(alert.runId)}
                  className="block w-full rounded-none border-2 border-[#40202a] bg-[#201118] px-3 py-3 text-left transition-colors enabled:hover:border-[#fb7185] disabled:cursor-default"
                >
                  <div className="font-medium text-rose-200">{alert.title}</div>
                  {alert.description ? <div className="mt-1 text-xs text-slate-400">{alert.description}</div> : null}
                </button>
              ))}
            </div>
          </PixelPanel>

          <PixelPanel
            title="任务控制台"
            subtitle="保留原版中间控制栏的位置，但改成适配 task runtime 的真实数据。"
          >
            <div className="space-y-4">
              <div className="grid gap-3 sm:grid-cols-2">
                <MiniMetric label="当前阶段" value={office.progress.stageLabel ?? office.currentStageLabel ?? '-'} />
                <MiniMetric label="活跃实例" value={String(office.stats.activeRuns)} />
              </div>

              <div className="space-y-2">
                <div className="flex items-center justify-between gap-3 font-mono text-[11px] uppercase tracking-[0.14em] text-slate-400">
                  <span>{office.progress.label}</span>
                  <span>{progressValue}%</span>
                </div>
                <div className="h-4 rounded-none border-2 border-[#263144] bg-[#0f1420] p-[2px]">
                  <div
                    className="h-full bg-[linear-gradient(90deg,#22d3ee,#fde047,#fb7185)] transition-all"
                    style={{ width: `${progressValue}%` }}
                  />
                </div>
              </div>

              {selectedTask ? (
                <div className="rounded-none border-2 border-[#2d3348] bg-[#0f1420] px-3 py-3">
                  <div className="font-mono text-[11px] uppercase tracking-[0.14em] text-slate-400">当前聚焦</div>
                  <div className="mt-2 text-sm font-semibold text-slate-100">{selectedTask.title}</div>
                  <div className="mt-1 text-xs text-slate-400">
                    {selectedTask.actorName} · {selectedTask.stageLabel ?? '无阶段标签'}
                  </div>
                </div>
              ) : null}

              <div className="grid gap-2 sm:grid-cols-2">
                <Button
                  onClick={() => setDetailOpen(true)}
                  className="w-full rounded-none border-2 border-[#2f3b16] bg-[#78a340] text-[#f3ffe6] hover:bg-[#8fbe4a]"
                >
                  打开详情
                  <PanelRightOpen className="ml-2 h-4 w-4" />
                </Button>
                <Button
                  asChild
                  variant="outline"
                  className="w-full rounded-none border-2 border-[#30364d] bg-[#171b29] text-slate-100 hover:bg-[#21283a]"
                >
                  <Link href="/">
                    回到对话
                    <ArrowRight className="ml-2 h-4 w-4" />
                  </Link>
                </Button>
              </div>

              {isOfficeTaskTerminal(office.status) ? (
                <div className="rounded-none border-2 border-[#365443] bg-[#12221d] px-3 py-3 text-sm text-emerald-200">
                  任务已结束，办公室已解散，但现场记录仍可回看。
                </div>
              ) : null}
            </div>
          </PixelPanel>

          <PixelPanel
            title="办公人员名单"
            subtitle="原版 visitor 区的替代，这里展示当前参与 task 的 agent 成员。"
          >
            <div className="space-y-2">
              {office.members.map((member) => (
                <button
                  key={member.memberId}
                  type="button"
                  onClick={() => openRunDetail(member.currentRunId)}
                  className="flex w-full items-center justify-between gap-3 rounded-none border-2 border-[#2d3348] bg-[#0f1420] px-3 py-3 text-left transition-colors hover:border-[#64748b]"
                >
                  <div className="min-w-0">
                    <div className="truncate font-medium text-slate-100">{member.actorName}</div>
                    <div className="truncate text-xs text-slate-400">{member.currentTitle}</div>
                  </div>
                  <OfficeStatusBadge status={member.status} />
                </button>
              ))}
            </div>
          </PixelPanel>
        </div>

        <div className="mx-auto grid max-w-[1280px] gap-5 xl:grid-cols-[1.08fr_0.92fr]">
          <BoardPanel
            icon={ListTree}
            title="任务看板"
            description="当前 task 下所有 run 的结构化列表。"
          >
            <div className="space-y-3">
              {office.tasks.map((task) => (
                <button
                  key={task.runId}
                  type="button"
                  onClick={() => openRunDetail(task.runId)}
                  className={`w-full rounded-none border-2 px-4 py-3 text-left transition-colors ${
                    selectedTask?.runId === task.runId
                      ? 'border-[#facc15] bg-[#201922]'
                      : 'border-[#2d3348] bg-[#0f1420] hover:border-[#64748b]'
                  }`}
                >
                  <div className="flex items-start justify-between gap-3">
                    <div className="min-w-0">
                      <div className="flex items-center gap-2">
                        <span className="truncate font-medium text-slate-100">{task.title}</span>
                        {task.isRoot ? (
                          <span className="rounded-none border border-[#4a3c17] bg-[#3b2f12] px-2 py-0.5 font-mono text-[10px] text-[#fef3c7]">
                            ROOT
                          </span>
                        ) : null}
                      </div>
                      <div className="mt-1 flex flex-wrap gap-x-3 gap-y-1 text-xs text-slate-400">
                        <span>{task.actorName}</span>
                        <span>{formatOfficeTime(task.updatedAt)}</span>
                        <span>{task.artifactCount} 个产物</span>
                      </div>
                    </div>
                    <OfficeStatusBadge status={task.status} />
                  </div>
                </button>
              ))}
            </div>
          </BoardPanel>

          <div className="space-y-5">
            <BoardPanel
              icon={Boxes}
              title="分工关系"
              description="主 Agent 到子 Agent 的委派关系。"
            >
              <div className="space-y-2">
                {office.assignments.length === 0 ? (
                  <div className="rounded-none border-2 border-dashed border-[#30364d] bg-[#0f1420] px-3 py-4 text-sm text-slate-400">
                    当前没有可见的子任务分工。
                  </div>
                ) : (
                  office.assignments.map((assignment) => (
                    <button
                      key={assignment.ownerRunId}
                      type="button"
                      onClick={() => openRunDetail(assignment.ownerRunId)}
                      className="w-full rounded-none border-2 border-[#2d3348] bg-[#0f1420] px-3 py-3 text-left text-sm transition-colors hover:border-[#64748b]"
                    >
                      <div className="font-medium text-slate-100">{assignment.label}</div>
                      <div className="mt-1 text-slate-400">{assignment.assigneeActorNames.join(' / ')}</div>
                    </button>
                  ))
                )}
              </div>
            </BoardPanel>

            <BoardPanel
              icon={Siren}
              title="现场告警"
              description="优先展示失败、阻塞和较高风险的任务信号。"
            >
              <div className="space-y-2">
                {office.alerts.length === 0 ? (
                  <div className="rounded-none border-2 border-dashed border-[#30364d] bg-[#0f1420] px-3 py-4 text-sm text-slate-400">
                    当前没有高优先级告警。
                  </div>
                ) : (
                  office.alerts.map((alert) => (
                    <button
                      key={alert.id}
                      type="button"
                      disabled={!alert.runId}
                      onClick={() => alert.runId && openRunDetail(alert.runId)}
                      className="w-full rounded-none border-2 border-[#40202a] bg-[#201118] px-3 py-3 text-left transition-colors enabled:hover:border-[#fb7185] disabled:cursor-default"
                    >
                      <div className="font-medium text-rose-200">{alert.title}</div>
                      {alert.description ? <div className="mt-1 text-sm text-slate-400">{alert.description}</div> : null}
                    </button>
                  ))
                )}
              </div>
            </BoardPanel>
          </div>
        </div>
      </div>

      <Sheet open={detailOpen} onOpenChange={setDetailOpen}>
        <SheetContent side="right" className="w-full border-l border-border sm:max-w-3xl">
          <SheetHeader className="pr-8">
            <SheetTitle>{selectedTask?.title ?? '任务详情'}</SheetTitle>
            <SheetDescription>
              {selectedTask
                ? `${selectedTask.actorName} · ${selectedTask.stageLabel ?? '无阶段标签'}`
                : '当前没有选中的任务实例。'}
            </SheetDescription>
          </SheetHeader>

          {!selectedTask ? (
            <div className="mt-6 rounded-xl border border-dashed border-border/60 px-4 py-6 text-sm text-muted-foreground">
              当前没有可展示的任务详情。
            </div>
          ) : (
            <ScrollArea className="mt-6 h-[calc(100vh-8.5rem)] pr-3">
              <div className="space-y-4 pb-6">
                <div className="rounded-xl border border-border/60 px-4 py-4">
                  <div className="flex items-center justify-between gap-3">
                    <div className="min-w-0">
                      <div className="truncate font-medium">{selectedTask.title}</div>
                      <div className="mt-1 text-xs text-muted-foreground">{selectedTask.actorName}</div>
                    </div>
                    <OfficeStatusBadge status={selectedTask.status} />
                  </div>
                  <div className="mt-3 grid gap-2 text-sm">
                    <div className="flex items-center justify-between gap-3">
                      <span className="text-muted-foreground">开始时间</span>
                      <span>{formatOfficeTime(selectedTask.startedAt)}</span>
                    </div>
                    <div className="flex items-center justify-between gap-3">
                      <span className="text-muted-foreground">最近更新</span>
                      <span>{formatOfficeTime(selectedTask.updatedAt)}</span>
                    </div>
                    <div className="flex items-center justify-between gap-3">
                      <span className="text-muted-foreground">阶段</span>
                      <span>{selectedTask.stageLabel ?? '-'}</span>
                    </div>
                  </div>
                  {selectedTask.summary ? (
                    <div className="mt-3 rounded-lg bg-muted/40 px-3 py-3 text-sm text-muted-foreground">
                      {selectedTask.summary}
                    </div>
                  ) : null}
                </div>

                <div className="grid gap-4 lg:grid-cols-[0.95fr_1.05fr]">
                  <div className="rounded-xl border border-border/60">
                    <div className="border-b border-border/60 px-4 py-3 text-sm font-medium">产物</div>
                    <div className="space-y-2 p-4">
                      {selectedArtifacts.length === 0 ? (
                        <div className="text-sm text-muted-foreground">当前没有产物。</div>
                      ) : (
                        selectedArtifacts.map((artifact) => (
                          <div key={artifact.artifact_id} className="rounded-lg border border-border/60 px-3 py-3">
                            <div className="font-medium">{artifact.title}</div>
                            <div className="mt-1 text-xs text-muted-foreground">
                              {artifact.artifact_type} · {formatOfficeTime(artifact.created_at)}
                            </div>
                          </div>
                        ))
                      )}
                    </div>
                  </div>

                  <div className="rounded-xl border border-border/60">
                    <div className="border-b border-border/60 px-4 py-3 text-sm font-medium">最近事件</div>
                    <div className="space-y-2 p-4">
                      {selectedEvents.length === 0 ? (
                        <div className="text-sm text-muted-foreground">当前没有事件。</div>
                      ) : (
                        selectedEvents.map((event) => (
                          <div key={event.event_id} className="rounded-lg border border-border/60 px-3 py-3">
                            <div className="flex items-center justify-between gap-3">
                              <div className="text-xs uppercase tracking-wide text-muted-foreground">{event.kind}</div>
                              <div className="text-xs text-muted-foreground">{formatOfficeTime(event.created_at)}</div>
                            </div>
                            <div className="mt-2 text-sm text-foreground/90">
                              {event.text || '结构化更新'}
                            </div>
                          </div>
                        ))
                      )}
                    </div>
                  </div>
                </div>
              </div>
            </ScrollArea>
          )}
        </SheetContent>
      </Sheet>
    </div>
  );
}

function MetricTile({ label, value }: { label: string; value: string }) {
  return (
    <div className="rounded-none border-2 border-[#2d3348] bg-[#0f1420] px-4 py-4 text-slate-100">
      <div className="font-mono text-[11px] uppercase tracking-[0.14em] text-slate-400">{label}</div>
      <div className="mt-2 text-xl font-semibold">{value}</div>
    </div>
  );
}

function MiniMetric({ label, value }: { label: string; value: string }) {
  return (
    <div className="rounded-none border-2 border-[#2d3348] bg-[#0f1420] px-3 py-3 text-slate-100">
      <div className="font-mono text-[11px] uppercase tracking-[0.14em] text-slate-400">{label}</div>
      <div className="mt-2 text-sm font-semibold">{value}</div>
    </div>
  );
}