'use client';

import { useMemo, useState } from 'react';
import { Plus, Pencil, Trash2, X, Check, ExternalLink, FileUp, Link2, Play, ArrowRightLeft } from 'lucide-react';
import type { VersionPlan, PlanTask } from '@/lib/version-plan';
import { calcPlanDuration, formatDuration, calcTotalDuration, calcPlanProgress, calcLinkedReqProgress } from '@/lib/version-plan';
import { formatDateTime } from '@/lib/format';
import { FieldError } from '@/components/FieldError';
import { AiDecomposeButton } from './AiDecomposeButton';
import type { VersionWithContext } from '@/lib/derive';
import type { Requirement } from '@/lib/requirement';
import { mergeSelectedRequirementOptions } from '@/lib/requirement-selector';
import { canEditPlanRequirementCoverage, canTogglePlanChecklist, getPlanCompletionState } from '@/lib/version-plan-workflow';

interface Props {
  plans: VersionPlan[];
  versionId: string;
  version?: VersionWithContext;
  versionDeadline?: string;
  currentUserName: string;
  planType: 'research' | 'product' | 'ui';
  versionMembers: { role: string; name: string }[];
  linkedRequirements?: Requirement[];
  allRequirements?: Requirement[];
  onCreate: (data: Omit<VersionPlan, 'id' | 'createdAt'>) => void;
  onUpdate: (id: string, data: Partial<VersionPlan>) => void;
  onComplete: (id: string, result: { resultType: 'link' | 'file'; resultTitle: string; resultUrl?: string; resultFileName?: string; resultFileData?: string }) => { ok: boolean; message?: string } | void;
  onDelete: (id: string) => void;
}

const TYPE_LABEL = { research: '调研', product: '产品方案', ui: 'UI设计' };
const STATUS_STYLE = {
  pending: 'bg-zinc-100 text-zinc-600',
  in_progress: 'bg-blue-50 text-blue-600 border-blue-200',
  completed: 'bg-green-50 text-green-700 border-green-200',
};
const STATUS_LABEL = { pending: '未开始', in_progress: '进行中', completed: '已完成' };

export function PlanTab({ plans, versionId, version, versionDeadline, currentUserName, planType, versionMembers, linkedRequirements, allRequirements, onCreate, onUpdate, onComplete, onDelete }: Props) {
  const [showCreateModal, setShowCreateModal] = useState(false);
  const [editingPlan, setEditingPlan] = useState<VersionPlan | null>(null);
  const [completingPlan, setCompletingPlan] = useState<VersionPlan | null>(null);
  const [transferPlanId, setTransferPlanId] = useState<string | null>(null);
  const [transferTo, setTransferTo] = useState('');

  const typePlans = plans.filter((p) => p.versionId === versionId && p.type === planType);
  const totalDuration = calcTotalDuration(typePlans);

  return (
    <div className="space-y-4">
      <div className="flex items-center justify-between">
        <div className="flex items-center gap-3">
          <span className="text-[12px] text-[var(--ink-muted)]">{typePlans.length} 个{TYPE_LABEL[planType]}计划</span>
          <span className="text-[12px] text-[var(--ink-soft)]">已耗时：<span className="font-medium text-[var(--ink)]">{totalDuration}</span></span>
          {versionDeadline && <span className="text-[12px] text-[var(--ink-muted)]">版本截止：<span className="font-medium text-red-500">{versionDeadline}</span></span>}
        </div>
        <button onClick={() => setShowCreateModal(true)} className="flex h-8 items-center gap-1.5 rounded-lg bg-[var(--accent)] px-3 text-[13px] font-medium text-white shadow-[var(--shadow-sm)] hover:bg-[var(--accent-hover)] transition-colors">
          <Plus className="h-3.5 w-3.5" strokeWidth={2} />
          新建计划
        </button>
      </div>

      {typePlans.length === 0 ? (
        <div className="rounded-xl border border-[var(--line)] bg-[var(--bg-card)] p-12 text-center text-[13px] text-[var(--ink-muted)]">
          暂无{TYPE_LABEL[planType]}计划
        </div>
      ) : (
        <div className="space-y-3">
          {typePlans.map((plan) => {
            const now = new Date().toISOString();
            // 自动开始：如果到了计划开始日期且状态还是 pending，视为已开始
            const autoStarted = plan.status === 'pending' && plan.startTime && new Date(plan.startTime) <= new Date();
            const effectiveStatus = autoStarted ? 'in_progress' : plan.status;
            const effectiveStartAt = plan.actualStartAt || (autoStarted ? plan.startTime : null);
            const completionState = getPlanCompletionState(plan);
            const canToggle = canTogglePlanChecklist(plan);
            const canEditCoverage = canEditPlanRequirementCoverage(plan);
            const requirementOptions = mergeSelectedRequirementOptions(linkedRequirements ?? [], allRequirements ?? [], plan.linkedRequirementIds ?? []);
            // 耗时用实际时间戳计算
            const dur = plan.status === 'completed' && plan.completedAt && plan.actualStartAt
              ? calcPlanDuration(plan.actualStartAt, plan.completedAt)
              : effectiveStatus === 'in_progress' && effectiveStartAt
                ? calcPlanDuration(effectiveStartAt, now)
                : { days: 0, hours: 0 };
            const durText = dur.days > 0 || dur.hours > 0 ? formatDuration(dur.days, dur.hours) : '-';
            // 如果自动开始了，触发 store 更新（副作用）
            if (autoStarted && !plan.actualStartAt) {
              onUpdate(plan.id, { status: 'in_progress' });
            }
            return (
              <div key={plan.id} className="rounded-xl border border-[var(--line)] bg-[var(--bg-card)] p-4">
                <div className="flex items-start justify-between">
                  <div className="flex-1">
                    <div className="flex items-center gap-2 mb-1.5">
                      <span className="text-[13px] font-medium text-[var(--ink)]">{plan.title}</span>
                      <span className={`inline-flex items-center rounded-md px-2 py-0.5 text-[10px] font-medium border ${STATUS_STYLE[effectiveStatus]}`}>
                        {STATUS_LABEL[effectiveStatus]}
                      </span>
                    </div>
                    <div className="flex items-center gap-4 text-[12px] text-[var(--ink-soft)]">
                      <span>计划：{formatDateTime(plan.startTime)} → {formatDateTime(plan.endTime)}</span>
                      {plan.actualStartAt && <span className="text-blue-600">实际开始：{formatDateTime(plan.actualStartAt)}</span>}
                      {plan.completedAt && <span className="text-green-600">完成：{formatDateTime(plan.completedAt)}</span>}
                      <span className="font-medium text-[var(--ink)]">已耗时 {durText}</span>
                    </div>
                    {plan.overdueReason && (
                      <div className="mt-1.5 text-[11px] text-red-600 bg-red-50 rounded px-2 py-1 inline-block">超期原因：{plan.overdueReason}</div>
                    )}
                    {(plan.type === 'product' || plan.type === 'ui') && (
                      <div className="mt-1.5 text-[12px] text-[var(--ink-soft)]">负责人：<span className="font-medium text-[var(--ink)]">{plan.owner}</span></div>
                    )}
                    {plan.status === 'completed' && plan.resultUrl && (
                      <div className="flex items-center gap-1.5 mt-2">
                        {plan.resultType === 'link' ? <Link2 className="h-3 w-3 text-[var(--accent)]" /> : <FileUp className="h-3 w-3 text-[var(--accent)]" />}
                        <a href={plan.resultUrl} target="_blank" rel="noopener noreferrer" className="text-[12px] text-[var(--accent)] hover:underline flex items-center gap-1">
                          {plan.resultTitle || plan.resultFileName || '查看成果'}<ExternalLink className="h-3 w-3" />
                        </a>
                        {planType === 'product' && version && (
                          <AiDecomposeButton plan={plan} version={version} />
                        )}
                      </div>
                    )}
                    {/* 子任务 */}
                    {plan.type === 'research' && plan.tasks && plan.tasks.length > 0 && (
                      <div className="mt-3 space-y-2">
                        <div className="flex items-center gap-2">
                          <div className="flex-1 h-1.5 rounded-full bg-[var(--bg-subtle)] overflow-hidden">
                            <div className="h-full rounded-full bg-[var(--accent)] transition-all" style={{ width: `${calcPlanProgress(plan.tasks)}%` }} />
                          </div>
                          <span className="text-[11px] font-medium tabular-nums text-[var(--ink-soft)]">{calcPlanProgress(plan.tasks)}%</span>
                        </div>
                        <div className="space-y-1">
                          {plan.tasks.map((task) => (
                            <div key={task.id} className="flex items-center gap-2">
                              <button
                                disabled={!canToggle}
                                onClick={() => {
                                  if (!canToggle) return;
                                  const nextStatus = task.status === 'completed' ? 'pending' : 'completed';
                                  const updatedTasks = plan.tasks!.map((t) => t.id === task.id ? { ...t, status: nextStatus as PlanTask['status'] } : t);
                                  onUpdate(plan.id, { tasks: updatedTasks });
                                }}
                                className={`h-4 w-4 rounded border flex items-center justify-center shrink-0 transition-colors ${!canToggle ? 'opacity-40 cursor-not-allowed' : ''} ${task.status === 'completed' ? 'bg-[var(--accent)] border-[var(--accent)]' : 'border-[var(--line)]'}`}
                              >
                                {task.status === 'completed' && <Check className="h-2.5 w-2.5 text-white" strokeWidth={3} />}
                              </button>
                              <span className={`text-[12px] ${task.status === 'completed' ? 'line-through text-[var(--ink-muted)]' : 'text-[var(--ink)]'}`}>{task.title}</span>
                              <span className={`text-[10px] ${task.status === 'completed' ? 'text-green-600' : 'text-[var(--ink-muted)]'}`}>
                                {task.status === 'completed' ? '已完成' : '未完成'}
                              </span>
                            </div>
                          ))}
                        </div>
                      </div>
                    )}
                    {/* 关联需求 */}
                    {plan.linkedRequirementIds && plan.linkedRequirementIds.length > 0 && requirementOptions.length > 0 && (
                      <div className="mt-3 space-y-2">
                        <div className="flex items-center gap-2">
                          <div className="flex-1 h-1.5 rounded-full bg-[var(--bg-subtle)] overflow-hidden">
                            <div className="h-full rounded-full bg-[var(--accent)] transition-all" style={{ width: `${calcLinkedReqProgress(plan.linkedRequirementIds, plan.completedRequirementIds)}%` }} />
                          </div>
                          <span className="text-[11px] font-medium tabular-nums text-[var(--ink-soft)]">{calcLinkedReqProgress(plan.linkedRequirementIds, plan.completedRequirementIds)}%</span>
                        </div>
                        <div className="space-y-1">
                          {plan.linkedRequirementIds.map((rid) => {
                            const req = requirementOptions.find((r) => r.id === rid);
                            const isDone = (plan.completedRequirementIds || []).includes(rid);
                            return req ? (
                              <div key={rid} className="flex items-center gap-2">
                                <button
                                  disabled={!canEditCoverage}
                                  onClick={() => {
                                    if (!canEditCoverage) return;
                                    const current = plan.completedRequirementIds || [];
                                    const next = isDone ? current.filter((id) => id !== rid) : [...current, rid];
                                    onUpdate(plan.id, { completedRequirementIds: next });
                                  }}
                                  className={`h-4 w-4 rounded border flex items-center justify-center shrink-0 transition-colors ${!canEditCoverage ? 'opacity-40 cursor-not-allowed' : ''} ${isDone ? 'bg-[var(--accent)] border-[var(--accent)]' : 'border-[var(--line)]'}`}
                                >
                                  {isDone && <Check className="h-2.5 w-2.5 text-white" strokeWidth={3} />}
                                </button>
                                <span className={`text-[11px] font-mono text-[var(--ink-muted)]`}>{req.code}</span>
                                <span className={`text-[12px] ${isDone ? 'line-through text-[var(--ink-muted)]' : 'text-[var(--ink)]'}`}>{req.title}</span>
                              </div>
                            ) : null;
                          })}
                        </div>
                      </div>
                    )}
                    {plan.status === 'in_progress' && !completionState.canSubmitResult && (
                      <p className="mt-2 text-[11px] text-[var(--ink-muted)]">还不能提交成果：{completionState.missingReasons.join('、')}</p>
                    )}
                  </div>
                  <div className="flex items-center gap-1 ml-3">
                    {plan.status === 'pending' && !autoStarted && (
                      <button onClick={() => onUpdate(plan.id, { status: 'in_progress' })} className="h-7 px-2 flex items-center gap-1 rounded-md text-[11px] font-medium text-blue-600 hover:bg-blue-50 border border-blue-200" title="提前开始">
                        <Play className="h-3 w-3" />开始
                      </button>
                    )}
                    {plan.status !== 'completed' && (
                      <>
                        <button onClick={() => setTransferPlanId(plan.id)} className="h-7 w-7 flex items-center justify-center rounded-md text-blue-500 hover:bg-blue-50" title="转交">
                          <ArrowRightLeft className="h-3.5 w-3.5" />
                        </button>
                        <button onClick={() => setEditingPlan(plan)} className="h-7 w-7 flex items-center justify-center rounded-md text-[var(--ink-muted)] hover:bg-[var(--bg-subtle)]" title="编辑">
                          <Pencil className="h-3.5 w-3.5" />
                        </button>
                        <button onClick={() => onDelete(plan.id)} className="h-7 w-7 flex items-center justify-center rounded-md text-red-500 hover:bg-red-50" title="删除">
                          <Trash2 className="h-3.5 w-3.5" />
                        </button>
                      </>
                    )}
                  </div>
                </div>
                {transferPlanId === plan.id && (
                  <div className="mt-3 pt-3 border-t border-[var(--line)] flex items-center gap-2">
                    <span className="text-[11px] text-[var(--ink-muted)]">转交给：</span>
                    <select value={transferTo} onChange={(e) => setTransferTo(e.target.value)} className="h-7 flex-1 rounded-lg border border-[var(--line)] px-2 text-[12px] focus:border-[var(--accent)] focus:outline-none">
                      <option value="">选择参与人员</option>
                      {versionMembers.filter((m) => m.name !== plan.owner).map((m) => <option key={`${m.role}-${m.name}`} value={m.name}>{m.name}</option>)}
                    </select>
                    <button onClick={() => { if (transferTo) { onUpdate(plan.id, { owner: transferTo }); setTransferPlanId(null); setTransferTo(''); } }} disabled={!transferTo} className="h-7 px-2.5 rounded-lg text-[11px] font-medium bg-blue-500 text-white disabled:opacity-50">确认</button>
                    <button onClick={() => { setTransferPlanId(null); setTransferTo(''); }} className="h-7 px-2 text-[11px] text-[var(--ink-muted)]">取消</button>
                  </div>
                )}
                {plan.status !== 'completed' && completionState.canSubmitResult && (
                  <div className="mt-3 rounded-lg bg-green-50 border border-green-200 px-3 py-2 flex items-center justify-between">
                    <span className="text-[12px] text-green-700">已满足提交成果条件</span>
                    <button onClick={() => setCompletingPlan(plan)} className="text-[11px] font-medium text-green-700 hover:text-green-900 underline">提交成果</button>
                  </div>
                )}
              </div>
            );
          })}
        </div>
      )}

      {(showCreateModal || editingPlan) && (
        <PlanFormModal
          initial={editingPlan}
          planType={planType}
          versionId={versionId}
          versionDeadline={versionDeadline}
          currentUserName={currentUserName}
          linkedRequirements={linkedRequirements}
          allRequirements={allRequirements}
          onClose={() => { setShowCreateModal(false); setEditingPlan(null); }}
          onSubmit={(data) => {
            if (editingPlan) onUpdate(editingPlan.id, data);
            else onCreate(data as any);
            setShowCreateModal(false);
            setEditingPlan(null);
          }}
        />
      )}

      {completingPlan && (
        <CompleteModal
          onClose={() => setCompletingPlan(null)}
          onSubmit={(result) => {
            const response = onComplete(completingPlan.id, result);
            if (response && typeof response === 'object' && 'ok' in response && !response.ok) {
              alert(response.message || '计划未满足完成条件');
              return;
            }
            setCompletingPlan(null);
          }}
        />
      )}
    </div>
  );
}

function PlanFormModal({ initial, planType, versionId, versionDeadline, currentUserName, linkedRequirements, allRequirements, onClose, onSubmit }: {
  initial: VersionPlan | null;
  planType: 'research' | 'product' | 'ui';
  versionId: string;
  versionDeadline?: string;
  currentUserName: string;
  linkedRequirements?: Requirement[];
  allRequirements?: Requirement[];
  onClose: () => void;
  onSubmit: (data: any) => void;
}) {
  const now = new Date().toISOString().slice(0, 16);
  const [title, setTitle] = useState(initial?.title ?? '');
  const [owner] = useState(initial?.owner ?? currentUserName);
  const [startTime, setStartTime] = useState(initial?.startTime?.slice(0, 16) ?? now);
  const [endTime, setEndTime] = useState(initial?.endTime?.slice(0, 16) ?? '');
  const [remark, setRemark] = useState(initial?.remark ?? '');
  const [tasks, setTasks] = useState<PlanTask[]>(initial?.tasks ?? []);
  const [newTaskTitle, setNewTaskTitle] = useState('');
  const [overdueReason, setOverdueReason] = useState(initial?.overdueReason ?? '');
  const [selectedReqs, setSelectedReqs] = useState<Set<string>>(new Set(initial?.linkedRequirementIds ?? []));
  const [endTimeError, setEndTimeError] = useState('');
  const requirementOptions = useMemo(
    () => mergeSelectedRequirementOptions(linkedRequirements ?? [], allRequirements ?? [], Array.from(selectedReqs)),
    [linkedRequirements, allRequirements, selectedReqs],
  );
  const isOverdue = !!(versionDeadline && endTime && new Date(endTime) > new Date(versionDeadline));

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    if (!title.trim() || !endTime) return;
    if (startTime && endTime && new Date(endTime).getTime() <= new Date(startTime).getTime()) {
      setEndTimeError('结束日期必须晚于开始日期');
      return;
    }
    setEndTimeError('');
    if (isOverdue && !overdueReason.trim()) return;
    if (planType === 'research' && tasks.length === 0) return;
    onSubmit({
      versionId,
      type: planType,
      title: title.trim(),
      owner: owner.trim() || currentUserName,
      startTime,
      endTime,
      status: initial?.status ?? 'pending',
      linkedRequirementIds: requirementOptions.length > 0 ? Array.from(selectedReqs) : undefined,
      tasks: planType === 'research' && tasks.length > 0 ? tasks : undefined,
      remark: remark.trim() || undefined,
      overdueReason: isOverdue ? overdueReason.trim() : undefined,
      addedBy: currentUserName,
    });
  };

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40" onClick={onClose}>
      <div className="w-full max-w-md rounded-2xl bg-[var(--bg-card)] border border-[var(--line)] p-5 shadow-[var(--shadow-md)]" onClick={(e) => e.stopPropagation()}>
        <div className="flex items-center justify-between mb-4">
          <h3 className="text-[13px] font-semibold text-[var(--ink)]">{initial ? '编辑' : '新建'}{TYPE_LABEL[planType]}计划</h3>
          <button onClick={onClose} className="p-1 rounded hover:bg-[var(--bg-subtle)] text-[var(--ink-muted)]"><X className="h-4 w-4" /></button>
        </div>
        <form onSubmit={handleSubmit} className="space-y-3">
          <div>
            <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1 block">标题</label>
            <input value={title} onChange={(e) => setTitle(e.target.value)} required className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] focus:border-[var(--accent)] focus:outline-none" />
          </div>
          <div>
            <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1 block">负责人</label>
            <input value={owner} readOnly className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-subtle)] px-3 text-[13px] text-[var(--ink-muted)] cursor-not-allowed" />
          </div>
          <div className="grid grid-cols-2 gap-3">
            <div>
              <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1 block">计划开始时间</label>
              <input type="datetime-local" value={startTime} onChange={(e) => setStartTime(e.target.value)} className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] focus:border-[var(--accent)] focus:outline-none" />
            </div>
            <div>
              <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1 block">计划截止时间</label>
              <input type="datetime-local" value={endTime} onChange={(e) => { setEndTime(e.target.value); setEndTimeError(''); }} required className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] focus:border-[var(--accent)] focus:outline-none" />
              <FieldError message={endTimeError} />
            </div>
          </div>
          {versionDeadline && (
            <div className="text-[11px] text-[var(--ink-muted)] -mt-1">版本截止日期：<span className="text-red-500 font-medium">{versionDeadline}</span></div>
          )}
          {isOverdue && (
            <div className="rounded-lg bg-red-50 border border-red-200 p-3 space-y-2">
              <div className="text-[12px] text-red-700 font-medium">⚠ 结束日期超出版本截止日期，请说明原因</div>
              <textarea
                value={overdueReason}
                onChange={(e) => setOverdueReason(e.target.value)}
                rows={2}
                placeholder="例如：技术难点超预期、上游交付延误..."
                required
                className="w-full rounded-lg border border-red-200 bg-white px-3 py-2 text-[13px] focus:border-red-400 focus:outline-none resize-none"
              />
            </div>
          )}
          {requirementOptions.length > 0 && (
            <div>
              <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1.5 block">关联需求</label>
              <div className="mb-2 flex items-center justify-between">
                <span className="text-[11px] text-[var(--ink-muted)]">已选 {selectedReqs.size} / {requirementOptions.filter((req) => !req.isHistorical).length}</span>
                <div className="flex gap-2">
                  <button
                    type="button"
                    onClick={() => setSelectedReqs(new Set(requirementOptions.map((req) => req.id)))}
                    className="text-[11px] text-[var(--accent)] hover:underline"
                  >
                    全选
                  </button>
                  <button
                    type="button"
                    onClick={() => setSelectedReqs(new Set())}
                    className="text-[11px] text-[var(--ink-muted)] hover:underline"
                  >
                    清空
                  </button>
                </div>
              </div>
              <div className="max-h-[120px] overflow-y-auto rounded-lg border border-[var(--line)] p-2 space-y-1">
                {requirementOptions.map((req) => (
                  <label key={req.id} className="flex items-center gap-2 rounded px-2 py-1 hover:bg-[var(--bg-subtle)] cursor-pointer text-[12px]">
                    <input type="checkbox" checked={selectedReqs.has(req.id)} onChange={() => { const s = new Set(selectedReqs); if (s.has(req.id)) s.delete(req.id); else s.add(req.id); setSelectedReqs(s); }} className="h-3.5 w-3.5 rounded" />
                    <span className="text-[var(--ink-muted)] font-mono">{req.code}</span>
                    <span className="text-[var(--ink)] truncate">{req.title}</span>
                    {req.isHistorical && <span className="text-[10px] text-orange-600 bg-orange-50 px-1.5 py-0.5 rounded">历史</span>}
                  </label>
                ))}
              </div>
            </div>
          )}
          {planType === 'research' && (
            <div>
              <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1.5 block">
                调研方向 <span className="text-red-500">*</span>
                <span className="text-[10px] text-[var(--ink-muted)] ml-1">至少添加一项</span>
              </label>
              {/* 预设选项 */}
              {tasks.length === 0 && (
                <div className="flex flex-wrap gap-1.5 mb-2">
                  {['竞品分析', '用户访谈', '数据调研', '技术可行性分析', '市场调研', '需求分析'].map((preset) => (
                    <button
                      key={preset}
                      type="button"
                      onClick={() => setTasks([...tasks, { id: `task-${Date.now()}-${Math.random().toString(36).slice(2, 5)}`, title: preset, status: 'pending' }])}
                      className="h-6 px-2.5 rounded-md text-[11px] border border-dashed border-[var(--line)] text-[var(--ink-soft)] hover:border-[var(--accent)] hover:text-[var(--accent)] transition-colors"
                    >
                      + {preset}
                    </button>
                  ))}
                </div>
              )}
              <div className="space-y-1.5 mb-2">
                {tasks.map((task, i) => (
                  <div key={task.id} className="flex items-center gap-2 rounded-lg bg-[var(--bg-subtle)] px-3 py-1.5">
                    <span className="flex-1 text-[12px] text-[var(--ink)]">{task.title}</span>
                    <button type="button" onClick={() => setTasks(tasks.filter((_, idx) => idx !== i))} className="text-red-400 hover:text-red-600"><X className="h-3 w-3" /></button>
                  </div>
                ))}
              </div>
              <div className="flex gap-2">
                <input
                  value={newTaskTitle}
                  onChange={(e) => setNewTaskTitle(e.target.value)}
                  onKeyDown={(e) => { if (e.key === 'Enter') { e.preventDefault(); if (newTaskTitle.trim()) { setTasks([...tasks, { id: `task-${Date.now()}`, title: newTaskTitle.trim(), status: 'pending' }]); setNewTaskTitle(''); } } }}
                  placeholder="自定义调研方向，回车添加"
                  className="flex-1 h-8 rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[12px] focus:border-[var(--accent)] focus:outline-none"
                />
                <button type="button" onClick={() => { if (newTaskTitle.trim()) { setTasks([...tasks, { id: `task-${Date.now()}`, title: newTaskTitle.trim(), status: 'pending' }]); setNewTaskTitle(''); } }} className="h-8 px-3 rounded-lg text-[12px] font-medium bg-[var(--bg-subtle)] text-[var(--ink-soft)] hover:bg-[var(--line)]">添加</button>
              </div>
              {tasks.length === 0 && (
                <div className="text-[11px] text-red-500 mt-1">请至少添加一项调研方向</div>
              )}
            </div>
          )}
          <div>
            <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1 block">备注</label>
            <textarea value={remark} onChange={(e) => setRemark(e.target.value)} rows={2} className="w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 py-2 text-[13px] focus:border-[var(--accent)] focus:outline-none resize-none" />
          </div>
          <div className="flex justify-end gap-2 pt-2">
            <button type="button" onClick={onClose} className="h-8 px-3 rounded-lg text-[12px] font-medium border border-[var(--line)] text-[var(--ink-soft)] hover:bg-[var(--bg-subtle)]">取消</button>
            <button type="submit" className="h-8 px-4 rounded-lg text-[12px] font-medium bg-[var(--accent)] text-white hover:bg-[var(--accent-hover)]">{initial ? '保存' : '创建'}</button>
          </div>
        </form>
      </div>
    </div>
  );
}

function CompleteModal({ onClose, onSubmit }: {
  onClose: () => void;
  onSubmit: (result: { resultType: 'link' | 'file'; resultTitle: string; resultUrl?: string; resultFileName?: string; resultFileData?: string }) => void;
}) {
  const [resultType, setResultType] = useState<'link' | 'file'>('link');
  const [resultTitle, setResultTitle] = useState('');
  const [url, setUrl] = useState('');
  const [fileName, setFileName] = useState('');
  const [fileData, setFileData] = useState('');

  const handleFile = (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    if (!file) return;
    setFileName(file.name);
    const reader = new FileReader();
    reader.onload = () => setFileData(reader.result as string);
    reader.readAsDataURL(file);
  };

  const canSubmit = resultTitle.trim().length > 0 && (resultType === 'link' ? url.trim().length > 0 : fileData.length > 0);

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40" onClick={onClose}>
      <div className="w-full max-w-sm rounded-2xl bg-[var(--bg-card)] border border-[var(--line)] p-5 shadow-[var(--shadow-md)]" onClick={(e) => e.stopPropagation()}>
        <div className="flex items-center justify-between mb-4">
          <h3 className="text-[13px] font-semibold text-[var(--ink)]">提交成果</h3>
          <button onClick={onClose} className="p-1 rounded hover:bg-[var(--bg-subtle)] text-[var(--ink-muted)]"><X className="h-4 w-4" /></button>
        </div>
        <div className="space-y-3">
          <div>
            <label className="block text-[11px] font-medium text-[var(--ink-soft)] mb-1">成果标题<span className="text-red-500 ml-0.5">*</span></label>
            <input value={resultTitle} onChange={(e) => setResultTitle(e.target.value)} placeholder="如 v1.0 产品方案" className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] focus:border-[var(--accent)] focus:outline-none" />
          </div>
          <div className="flex gap-2">
            <button type="button" onClick={() => setResultType('link')} className={`h-8 px-3 rounded-lg text-[12px] font-medium border transition-colors ${resultType === 'link' ? 'border-[var(--accent)] bg-[var(--accent-soft)] text-[var(--accent)]' : 'border-[var(--line)] text-[var(--ink-soft)]'}`}>链接</button>
            <button type="button" onClick={() => setResultType('file')} className={`h-8 px-3 rounded-lg text-[12px] font-medium border transition-colors ${resultType === 'file' ? 'border-[var(--accent)] bg-[var(--accent-soft)] text-[var(--accent)]' : 'border-[var(--line)] text-[var(--ink-soft)]'}`}>文件</button>
          </div>
          {resultType === 'link' ? (
            <input value={url} onChange={(e) => setUrl(e.target.value)} placeholder="https://..." className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] focus:border-[var(--accent)] focus:outline-none" />
          ) : (
            <div>
              <input type="file" onChange={handleFile} className="text-[12px] text-[var(--ink-soft)]" />
              {fileName && <p className="text-[11px] text-[var(--ink-muted)] mt-1">已选：{fileName}</p>}
            </div>
          )}
          <div className="flex justify-end gap-2 pt-2">
            <button onClick={onClose} className="h-8 px-3 rounded-lg text-[12px] font-medium border border-[var(--line)] text-[var(--ink-soft)] hover:bg-[var(--bg-subtle)]">取消</button>
            <button onClick={() => onSubmit({ resultType, resultTitle: resultTitle.trim(), resultUrl: resultType === 'link' ? url.trim() : fileData, resultFileName: fileName || undefined, resultFileData: resultType === 'file' ? fileData : undefined })} disabled={!canSubmit} className="h-8 px-4 rounded-lg text-[12px] font-medium bg-[var(--accent)] text-white hover:bg-[var(--accent-hover)] disabled:opacity-50">确认</button>
          </div>
        </div>
      </div>
    </div>
  );
}
