'use client';

import { RouteGuard } from '@/components/auth/Guard';
import { useEffect, useMemo, useState } from 'react';
import { useRouter } from 'next/navigation';
import { Search, Tag, Plus, X, ChevronDown, MoreHorizontal, Pause, Play, XCircle, Trash2, Layers, Package, FolderKanban } from 'lucide-react';
import { useProductStore } from '@/stores/useProductStore';
import { useRequirementStore } from '@/stores/useRequirementStore';
import { useVersionPlanStore } from '@/stores/useVersionPlanStore';
import { useDevTaskStore } from '@/stores/useDevTaskStore';
import { useTestCaseStore } from '@/stores/useTestCaseStore';
import { useAuthStore } from '@/stores/useAuthStore';
import { useMemberStore } from '@/stores/useMemberStore';
import { flattenVersions } from '@/lib/derive';
import type { VersionWithContext } from '@/lib/derive';
import { VersionStatus } from '@/lib/version-status';
import { ROLE_LABEL } from '@/lib/stage';
import { buildVersionProgressMap } from '@/lib/version-progress';
import { useXiaobaoWarningRisks } from '@/hooks/useXiaobaoWarningRisks';
import type { XiaobaoVersionRisk } from '@/lib/xiaobao-risk';
import { getRiskScoreTone } from '@/lib/xiaobao-warning-view';
import { buildVersionScopeTree, filterVersionsForList, type VersionListScope, type VersionProductNode } from '@/lib/version-list';
import { getRequirementVersionUnlinkPatch } from '@/lib/requirement-version-link';
import {
  VERSION_DEVELOPMENT_TYPE_OPTIONS,
  canSubmitNewVersionForm,
  getRecommendedExpectedReleaseDate,
  getRecommendedWorkDays,
  getVersionDevelopmentTypeOption,
  type VersionDevelopmentType,
} from '@/lib/version-form';
import { Pagination, usePagination } from '@/components/Pagination';

type Priority = 'P0' | 'P1' | 'P2' | 'P3' | 'P4';

const PRIORITY_COLORS: Record<Priority, string> = {
  P0: 'bg-red-500/10 text-red-600',
  P1: 'bg-orange-500/10 text-orange-600',
  P2: 'bg-blue-500/10 text-blue-600',
  P3: 'bg-zinc-100 text-zinc-600',
  P4: 'bg-zinc-100 text-zinc-500',
};

const PRIORITY_ORDER: Record<Priority, number> = {
  P0: 0,
  P1: 1,
  P2: 2,
  P3: 3,
  P4: 4,
};

const RISK_SCORE_TEXT_CLASS = {
  danger: 'text-red-600',
  warn: 'text-orange-600',
  ok: 'text-emerald-600',
} as const;

const RISK_SCORE_DOT_CLASS = {
  danger: 'bg-red-500',
  warn: 'bg-orange-500',
  ok: 'bg-emerald-500',
} as const;

function sortVersions(versions: VersionWithContext[]): VersionWithContext[] {
  return [...versions].sort((a, b) => {
    // Sort by priority desc (P0 first)
    const pa = PRIORITY_ORDER[(a.priority ?? 'P2') as Priority] ?? 2;
    const pb = PRIORITY_ORDER[(b.priority ?? 'P2') as Priority] ?? 2;
    if (pa !== pb) return pa - pb;
    // Then by createdAt desc
    return new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime();
  });
}

export default function VersionsPage() {
  return (
    <RouteGuard permission="version:view">
      <VersionsPageContent />
    </RouteGuard>
  );
}

function VersionsPageContent() {
  const router = useRouter();
  const { overview, fetchOverview, createVersion, updateVersion, deleteVersion } = useProductStore();
  const [versionKeyword, setVersionKeyword] = useState('');
  const [treeKeyword, setTreeKeyword] = useState('');
  const [selectedScope, setSelectedScope] = useState<VersionListScope>({ type: 'all' });
  const [priorityFilter, setPriorityFilter] = useState('all');
  const [priorityDropdownOpen, setPriorityDropdownOpen] = useState(false);
  const [showModal, setShowModal] = useState(false);
  const [openMenuId, setOpenMenuId] = useState<string | null>(null);

  useEffect(() => { fetchOverview(); }, [fetchOverview]);

  const { requirements, fetchRequirements, updateRequirement } = useRequirementStore();
  useEffect(() => { fetchRequirements(); }, [fetchRequirements]);

  const { plans, fetchPlans } = useVersionPlanStore();
  useEffect(() => { fetchPlans(); }, [fetchPlans]);

  const { tasks: devTasks, fetchTasks: fetchDevTasks } = useDevTaskStore();
  useEffect(() => { fetchDevTasks(); }, [fetchDevTasks]);

  const { testCases, fetchTestCases } = useTestCaseStore();
  useEffect(() => { fetchTestCases(); }, [fetchTestCases]);

  const user = useAuthStore((s) => s.user);
  const currentUserName = user?.name || '';
  const { roles } = useMemberStore();
  const isSuperAdmin = useMemo(() => {
    const r = roles.find((x) => x.id === user?.roleId);
    return !!r && r.permissions.includes('*');
  }, [roles, user?.roleId]);

  const allVersionsRaw = useMemo(() => flattenVersions(overview), [overview]);
  const { risks: xiaobaoRisks } = useXiaobaoWarningRisks();
  const xiaobaoRiskMap = useMemo(
    () => new Map(xiaobaoRisks.map((risk) => [risk.versionId, risk])),
    [xiaobaoRisks],
  );
  // 只显示当前用户参与的版本（members为空时所有人可见；超管可见全部）
  const allVersions = useMemo(() => allVersionsRaw.filter((v) => {
    if (isSuperAdmin) return true;
    if (!v.members || v.members.length === 0) return true;
    return v.members.some((m) => m.name === currentUserName);
  }), [allVersionsRaw, currentUserName, isSuperAdmin]);
  const versionTree = useMemo(() => buildVersionScopeTree(allVersions, treeKeyword), [allVersions, treeKeyword]);

  // Compute overall progress per version from actual data
  const versionProgressMap = useMemo(
    () => buildVersionProgressMap(allVersions, plans, requirements, devTasks, testCases),
    [allVersions, plans, requirements, devTasks, testCases],
  );

  const filtered = useMemo(() => {
    const list = filterVersionsForList(allVersions, {
      scope: selectedScope,
      keyword: versionKeyword,
      priority: priorityFilter as Priority | 'all',
    });
    return sortVersions(list);
  }, [allVersions, selectedScope, versionKeyword, priorityFilter]);

  const { paged, page, setPage, total, pageSize, setPageSize } = usePagination(filtered, 20);

  const selectedScopeLabel = useMemo(() => {
    if (selectedScope.type === 'product') {
      return allVersions.find((version) => version.productId === selectedScope.productId)?.productName ?? '产品';
    }
    if (selectedScope.type === 'project') {
      const found = allVersions.find((version) => version.projectId === selectedScope.projectId);
      return found ? `${found.productName} / ${found.projectName}` : '项目';
    }
    return '全部版本';
  }, [allVersions, selectedScope]);

  const handleAction = async (version: VersionWithContext, action: 'pause' | 'resume' | 'close' | 'delete') => {
    setOpenMenuId(null);
    if (action === 'delete') {
      if (!confirm('确认删除该版本？关联的需求会回到需求池。')) return;
      requirements
        .filter((r) => r.versionId === version.id)
        .forEach((r) => updateRequirement(r.id, { productId: r.productId, ...getRequirementVersionUnlinkPatch(r) }));
      deleteVersion(version.productId, version.id);
      return;
    }
    const statusMap: Record<string, VersionStatus> = {
      pause: 'paused',
      resume: 'developing',
      close: 'closed',
    };
    if (updateVersion) {
      await updateVersion(version.productId, version.id, { status: statusMap[action] });
    }
  };

  return (
    <div className="flex h-full overflow-hidden">
      <VersionScopeSidebar
        tree={versionTree}
        totalCount={allVersions.length}
        keyword={treeKeyword}
        selectedScope={selectedScope}
        onKeywordChange={setTreeKeyword}
        onSelectScope={(scope) => {
          setSelectedScope(scope);
          setPage(1);
        }}
      />

      <section className="flex min-w-0 flex-1 flex-col bg-[var(--bg)]">
        <header className="flex h-14 shrink-0 items-center justify-between border-b border-[var(--line)] bg-[var(--bg-card)] px-5">
          <div className="min-w-0">
            <div className="flex items-center gap-2.5">
              <h1 className="text-[15px] font-semibold tracking-tight text-[var(--ink)]">版本列表</h1>
              <span className="rounded-md bg-[var(--bg-subtle)] px-1.5 py-0.5 text-[11px] font-medium tabular-nums text-[var(--ink-soft)]">{filtered.length}</span>
            </div>
            <p className="mt-0.5 truncate text-[11px] text-[var(--ink-muted)]">{selectedScopeLabel}</p>
          </div>
          <button onClick={() => setShowModal(true)} className="flex h-8 shrink-0 items-center gap-1.5 rounded-lg bg-[var(--accent)] px-3 text-[13px] font-medium text-white shadow-[var(--shadow-sm)] transition-colors hover:bg-[var(--accent-hover)]">
            <Plus className="h-3.5 w-3.5" strokeWidth={2} />
            新建版本
          </button>
        </header>

        <div className="flex shrink-0 flex-wrap items-center gap-3 border-b border-[var(--line)] bg-[var(--bg-card)] px-5 py-3">
          <div className="relative">
            <Search className="pointer-events-none absolute left-2.5 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-[var(--ink-muted)]" strokeWidth={2} />
            <input
              value={versionKeyword}
              onChange={(event) => { setVersionKeyword(event.target.value); setPage(1); }}
              placeholder="搜索版本号"
              className="h-8 w-72 rounded-lg border border-[var(--line)] bg-[var(--bg)] pl-8 pr-3 text-[13px] text-[var(--ink)] placeholder:text-[var(--ink-muted)] focus:border-[var(--accent)] focus:outline-none focus:ring-2 focus:ring-[var(--accent-ring)]"
            />
          </div>

          <div className="relative">
            <button onClick={() => setPriorityDropdownOpen(!priorityDropdownOpen)} className="flex h-8 items-center gap-1.5 rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[12px] text-[var(--ink-soft)] transition-colors hover:border-[var(--accent)] hover:text-[var(--accent)]">
              {priorityFilter === 'all' ? '全部优先级' : priorityFilter}
              <ChevronDown className="h-3 w-3" strokeWidth={2} />
            </button>
            {priorityDropdownOpen && (
              <>
                <div className="fixed inset-0 z-10" onClick={() => setPriorityDropdownOpen(false)} />
                <div className="absolute left-0 top-full z-20 mt-1 min-w-[100px] rounded-lg border border-[var(--line)] bg-[var(--bg-card)] py-1 shadow-[var(--shadow-md)]">
                  <button onClick={() => { setPriorityFilter('all'); setPriorityDropdownOpen(false); setPage(1); }} className={`block w-full px-3 py-1.5 text-left text-[12px] transition-colors ${priorityFilter === 'all' ? 'bg-[var(--accent-soft)] text-[var(--accent)]' : 'text-[var(--ink-soft)] hover:bg-[var(--bg-hover)]'}`}>
                    全部优先级
                  </button>
                  {(['P0', 'P1', 'P2', 'P3', 'P4'] as Priority[]).map((priority) => (
                    <button key={priority} onClick={() => { setPriorityFilter(priority); setPriorityDropdownOpen(false); setPage(1); }} className={`block w-full px-3 py-1.5 text-left text-[12px] transition-colors ${priorityFilter === priority ? 'bg-[var(--accent-soft)] text-[var(--accent)]' : 'text-[var(--ink-soft)] hover:bg-[var(--bg-hover)]'}`}>
                      {priority}
                    </button>
                  ))}
                </div>
              </>
            )}
          </div>
        </div>

        <div className="min-h-0 flex-1 overflow-y-auto p-5">
          {filtered.length === 0 ? (
            <div className="rounded-2xl border border-dashed border-[var(--line)] bg-[var(--bg-card)] py-20 text-center">
              <p className="text-[13px] font-medium text-[var(--ink-soft)]">没有找到匹配的版本</p>
              <p className="mt-1.5 text-[12px] text-[var(--ink-muted)]">尝试调整左侧范围或右侧筛选</p>
            </div>
          ) : (
            <>
              <div className="overflow-hidden rounded-2xl border border-[var(--line)] bg-[var(--bg-card)] shadow-[var(--shadow-sm)]">
                <div className="overflow-x-auto">
                  <table className="min-w-[920px] w-full text-left text-[13px]">
                    <thead className="sticky top-0 z-10 bg-[var(--bg-subtle)]">
                      <tr className="border-b border-[var(--line)] bg-[var(--bg-subtle)]">
                        <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">版本号</th>
                        <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">优先级</th>
                        <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">整体进度</th>
                        <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">风险分</th>
                        <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">期望发版</th>
                        <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">负责人</th>
                        <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">操作</th>
                      </tr>
                    </thead>
                    <tbody>
                      {paged.map((version) => (
                        <VersionRow
                          key={version.id}
                          version={version}
                          overallProgress={versionProgressMap[version.id] ?? 0}
                          xiaobaoRisk={xiaobaoRiskMap.get(version.id)}
                          openMenuId={openMenuId}
                          setOpenMenuId={setOpenMenuId}
                          onNavigate={() => router.push(`/versions/${version.id}`)}
                          onAction={handleAction}
                        />
                      ))}
                    </tbody>
                  </table>
                </div>
              </div>
              <Pagination total={total} page={page} pageSize={pageSize} onChange={setPage} onPageSizeChange={setPageSize} />
            </>
          )}
        </div>
      </section>

      {showModal && <NewVersionModal overview={overview} onClose={() => setShowModal(false)} onCreate={createVersion} currentUserName={currentUserName} />}
    </div>
  );
}

interface VersionRowProps {
  version: VersionWithContext;
  overallProgress: number;
  xiaobaoRisk?: XiaobaoVersionRisk;
  openMenuId: string | null;
  setOpenMenuId: (id: string | null) => void;
  onNavigate: () => void;
  onAction: (version: VersionWithContext, action: 'pause' | 'resume' | 'close' | 'delete') => void;
}

function VersionScopeSidebar({ tree, totalCount, keyword, selectedScope, onKeywordChange, onSelectScope }: {
  tree: VersionProductNode[];
  totalCount: number;
  keyword: string;
  selectedScope: VersionListScope;
  onKeywordChange: (value: string) => void;
  onSelectScope: (scope: VersionListScope) => void;
}) {
  const allActive = selectedScope.type === 'all';

  return (
    <aside className="flex h-full w-72 shrink-0 flex-col border-r border-[var(--line)] bg-[var(--bg-card)]">
      <div className="flex h-14 shrink-0 items-center justify-between border-b border-[var(--line)] px-4">
        <div>
          <h2 className="text-[14px] font-semibold text-[var(--ink)]">版本</h2>
          <p className="mt-0.5 text-[11px] text-[var(--ink-muted)]">按产品 / 项目查看版本</p>
        </div>
        <span className="rounded-md bg-[var(--bg-subtle)] px-1.5 py-0.5 text-[11px] font-medium tabular-nums text-[var(--ink-soft)]">{totalCount}</span>
      </div>

      <div className="shrink-0 border-b border-[var(--line)] p-3">
        <div className="relative">
          <Search className="pointer-events-none absolute left-2.5 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-[var(--ink-muted)]" strokeWidth={2} />
          <input
            value={keyword}
            onChange={(event) => onKeywordChange(event.target.value)}
            placeholder="搜索产品/项目"
            className="h-8 w-full rounded-lg border border-[var(--line)] bg-[var(--bg)] pl-8 pr-7 text-[12px] text-[var(--ink)] placeholder:text-[var(--ink-muted)] focus:border-[var(--accent)] focus:outline-none"
          />
          {keyword && (
            <button onClick={() => onKeywordChange('')} className="absolute right-1.5 top-1/2 rounded p-0.5 -translate-y-1/2 hover:bg-[var(--bg-subtle)]" title="清除">
              <X className="h-3 w-3 text-[var(--ink-muted)]" />
            </button>
          )}
        </div>
      </div>

      <div className="min-h-0 flex-1 overflow-y-auto p-2">
        <button
          onClick={() => onSelectScope({ type: 'all' })}
          className={`mb-1 flex w-full items-center gap-2 rounded-lg px-3 py-2 text-[12px] transition-colors ${allActive ? 'bg-[var(--accent-soft)] font-medium text-[var(--accent)]' : 'text-[var(--ink-soft)] hover:bg-[var(--bg-subtle)]'}`}
        >
          <Layers className="h-3.5 w-3.5" />
          <span className="min-w-0 flex-1 truncate text-left">全部版本</span>
          <span className="shrink-0 rounded-full bg-[var(--bg-subtle)] px-1.5 text-[10px] tabular-nums text-[var(--ink-muted)]">{totalCount}</span>
        </button>

        {tree.length === 0 ? (
          <div className="rounded-lg border border-dashed border-[var(--line)] px-3 py-8 text-center text-[12px] text-[var(--ink-muted)]">无匹配范围</div>
        ) : (
          tree.map((product) => {
            const productActive = selectedScope.type === 'product' && selectedScope.productId === product.productId;
            return (
              <div key={product.productId} className="mb-1">
                <button
                  onClick={() => onSelectScope({ type: 'product', productId: product.productId })}
                  className={`flex w-full items-center gap-2 rounded-lg px-3 py-2 text-[12px] transition-colors ${productActive ? 'bg-[var(--accent-soft)] font-medium text-[var(--accent)]' : 'text-[var(--ink-soft)] hover:bg-[var(--bg-subtle)]'}`}
                >
                  <Package className="h-3.5 w-3.5 shrink-0" />
                  <span className="min-w-0 flex-1 truncate text-left" title={product.productName}>{product.productName}</span>
                  <span className="shrink-0 rounded-full bg-[var(--bg-subtle)] px-1.5 text-[10px] tabular-nums text-[var(--ink-muted)]">{product.count}</span>
                </button>
                <div className="mt-0.5 space-y-0.5 pl-4">
                  {product.projects.map((project) => {
                    const projectActive = selectedScope.type === 'project' && selectedScope.projectId === project.projectId;
                    return (
                      <button
                        key={project.projectId}
                        onClick={() => onSelectScope({ type: 'project', projectId: project.projectId })}
                        className={`flex w-full items-center gap-2 rounded-lg px-3 py-1.5 text-[12px] transition-colors ${projectActive ? 'bg-[var(--accent-soft)] font-medium text-[var(--accent)]' : 'text-[var(--ink-muted)] hover:bg-[var(--bg-subtle)] hover:text-[var(--ink-soft)]'}`}
                      >
                        <FolderKanban className="h-3.5 w-3.5 shrink-0" />
                        <span className="min-w-0 flex-1 truncate text-left" title={project.projectName}>{project.projectName}</span>
                        <span className="shrink-0 rounded-full bg-[var(--bg-subtle)] px-1.5 text-[10px] tabular-nums text-[var(--ink-muted)]">{project.count}</span>
                      </button>
                    );
                  })}
                </div>
              </div>
            );
          })
        )}
      </div>
    </aside>
  );
}

function VersionRow({ version, overallProgress, xiaobaoRisk, openMenuId, setOpenMenuId, onNavigate, onAction }: VersionRowProps) {
  const priority = (version.priority ?? 'P2') as Priority;
  const riskScoreTone = xiaobaoRisk ? getRiskScoreTone(xiaobaoRisk.riskScore) : null;
  const isMenuOpen = openMenuId === version.id;

  // Members: show first 2 with role label, then +N
  const members = version.members ?? [];
  const displayMembers = members.slice(0, 2);
  const extraCount = members.length - 2;

  return (
    <tr className="border-b border-[var(--line-soft)] last:border-0 transition-colors hover:bg-[var(--bg-subtle)]">
      {/* 版本号 */}
      <td className="px-4 py-3">
        <button onClick={onNavigate} className="flex items-center gap-2 font-medium text-[var(--ink)] hover:text-[var(--accent)] transition-colors">
          <Tag className="h-3.5 w-3.5 text-[var(--ink-muted)]" strokeWidth={1.75} />
          {version.name}
        </button>
      </td>

      {/* 优先级 */}
      <td className="px-4 py-3">
        <span className={`inline-flex items-center rounded-md px-2 py-0.5 text-[11px] font-medium ${PRIORITY_COLORS[priority]}`}>
          {priority}
        </span>
      </td>

      {/* 整体进度 */}
      <td className="px-4 py-3">
        <div className="flex items-center gap-2">
          <div className="h-1.5 w-20 rounded-full bg-zinc-100">
            <div
              className="h-1.5 rounded-full bg-blue-500 transition-all"
              style={{ width: `${overallProgress}%` }}
            />
          </div>
          <span className="text-[11px] tabular-nums text-[var(--ink-muted)]">{overallProgress}%</span>
        </div>
      </td>

      {/* 风险分 */}
      <td className="px-4 py-3">
        {xiaobaoRisk && riskScoreTone ? (
          <span className={`inline-flex items-center gap-1.5 text-[12px] font-semibold tabular-nums ${RISK_SCORE_TEXT_CLASS[riskScoreTone]}`}>
            <span className={`h-2 w-2 rounded-full ${RISK_SCORE_DOT_CLASS[riskScoreTone]}`} />
            {xiaobaoRisk.riskScore}
          </span>
        ) : (
          <span className="text-[11px] text-[var(--ink-muted)]">-</span>
        )}
      </td>

      {/* 截止日期 */}
      <td className="px-4 py-3 text-[var(--ink-muted)] tabular-nums">
        {version.expectedReleaseDate
          ? new Date(version.expectedReleaseDate).toISOString().slice(0, 10)
          : '-'}
      </td>

      {/* 负责人 */}
      <td className="px-4 py-3">
        <div className="flex items-center gap-1 text-[11px] text-[var(--ink-soft)]">
          {displayMembers.map((m, i) => (
            <span key={i} className="whitespace-nowrap">
              {ROLE_LABEL[m.role]}:{m.name}
            </span>
          ))}
          {extraCount > 0 && (
            <span className="whitespace-nowrap text-[var(--ink-muted)]">+{extraCount}</span>
          )}
          {members.length === 0 && <span className="text-[var(--ink-muted)]">-</span>}
        </div>
      </td>

      {/* 操作 */}
      <td className="px-4 py-3">
        <div className="relative">
          <button
            onClick={() => setOpenMenuId(isMenuOpen ? null : version.id)}
            className="rounded-lg p-1.5 text-[var(--ink-muted)] hover:bg-[var(--bg-hover)] transition-colors"
          >
            <MoreHorizontal className="h-4 w-4" strokeWidth={1.75} />
          </button>
          {isMenuOpen && (
            <>
              <div className="fixed inset-0 z-10" onClick={() => setOpenMenuId(null)} />
              <div className="absolute right-0 top-full z-20 mt-1 min-w-[120px] rounded-lg border border-[var(--line)] bg-[var(--bg-card)] py-1 shadow-[var(--shadow-md)]">
                {version.status === 'developing' && (
                  <button
                    onClick={() => onAction(version, 'pause')}
                    className="flex w-full items-center gap-2 px-3 py-1.5 text-left text-[12px] text-[var(--ink-soft)] hover:bg-[var(--bg-hover)] transition-colors"
                  >
                    <Pause className="h-3.5 w-3.5" strokeWidth={1.75} />
                    暂停
                  </button>
                )}
                {version.status === 'paused' && (
                  <button
                    onClick={() => onAction(version, 'resume')}
                    className="flex w-full items-center gap-2 px-3 py-1.5 text-left text-[12px] text-[var(--ink-soft)] hover:bg-[var(--bg-hover)] transition-colors"
                  >
                    <Play className="h-3.5 w-3.5" strokeWidth={1.75} />
                    恢复
                  </button>
                )}
                {version.status !== 'closed' && version.status !== 'released' && (
                  <button
                    onClick={() => onAction(version, 'close')}
                    className="flex w-full items-center gap-2 px-3 py-1.5 text-left text-[12px] text-red-600 hover:bg-[var(--bg-hover)] transition-colors"
                  >
                    <XCircle className="h-3.5 w-3.5" strokeWidth={1.75} />
                    关闭
                  </button>
                )}
                {version.status === 'planned' && (
                  <button
                    onClick={() => onAction(version, 'delete')}
                    className="flex w-full items-center gap-2 px-3 py-1.5 text-left text-[12px] text-red-600 hover:bg-[var(--bg-hover)] transition-colors"
                  >
                    <Trash2 className="h-3.5 w-3.5" strokeWidth={1.75} />
                    删除
                  </button>
                )}
              </div>
            </>
          )}
        </div>
      </td>
    </tr>
  );
}

type IterationType = 'major' | 'minor' | 'patch';

interface NewVersionModalProps {
  overview: any[];
  onClose: () => void;
  onCreate: (productId: string, data: { name: string; status: VersionStatus; priority?: Priority; expectedReleaseDate: string; members?: any[] }) => void;
  currentUserName: string;
}

function getNextVersion(existingVersions: any[], projectName: string, type: IterationType): string {
  const projectVersions = existingVersions
    .filter((v: any) => v.name.startsWith(projectName + 'V'))
    .map((v: any) => {
      const match = v.name.match(/V([\d.]+)$/i);
      return match ? match[1].split('.').map(Number) : null;
    })
    .filter(Boolean) as number[][];

  if (projectVersions.length === 0) {
    if (type === 'major') return '1.0';
    if (type === 'minor') return '0.1';
    return '0.0.1';
  }

  // Find the max version
  projectVersions.sort((a, b) => {
    const len = Math.max(a.length, b.length);
    for (let i = 0; i < len; i++) {
      const diff = (b[i] ?? 0) - (a[i] ?? 0);
      if (diff !== 0) return diff;
    }
    return 0;
  });
  const latest = projectVersions[0];

  if (type === 'major') {
    return `${(latest[0] ?? 0) + 1}.0`;
  } else if (type === 'minor') {
    return `${latest[0] ?? 0}.${(latest[1] ?? 0) + 1}`;
  } else {
    const major = latest[0] ?? 0;
    const minor = latest[1] ?? 0;
    const patch = latest[2] ?? 0;
    return `${major}.${minor}.${patch + 1}`;
  }
}

function NewVersionModal({ overview, onClose, onCreate, currentUserName }: NewVersionModalProps) {
  const [productId, setProductId] = useState('');
  const [projectId, setProjectId] = useState('');
  const [projectName, setProjectName] = useState('');
  const [iterationType, setIterationType] = useState<IterationType | ''>('');
  const [versionNumber, setVersionNumber] = useState('');
  const [developmentType, setDevelopmentType] = useState<VersionDevelopmentType | ''>('');
  const [productDesignCompleted, setProductDesignCompleted] = useState(false);
  const [status] = useState<VersionStatus>('developing');
  const [priority, setPriority] = useState<Priority>('P2');
  const [expectedReleaseDate, setExpectedReleaseDate] = useState('');
  const [submitting, setSubmitting] = useState(false);

  const selectedProduct = overview.find((p: any) => p.id === productId);
  const projects = selectedProduct?.projects ?? [];
  const existingVersions = selectedProduct?.versions ?? [];

  // When product changes, reset project
  const handleProductChange = (pid: string) => {
    setProductId(pid);
    setProjectId('');
    setProjectName('');
    setIterationType('');
    setVersionNumber('');
    setDevelopmentType('');
    setProductDesignCompleted(false);
    setExpectedReleaseDate('');
  };

  // When project changes
  const handleProjectChange = (projId: string) => {
    const proj = projects.find((p: any) => p.id === projId);
    setProjectId(projId);
    setProjectName(proj?.name ?? '');
    setIterationType('');
    setVersionNumber('');
    setDevelopmentType('');
    setProductDesignCompleted(false);
    setExpectedReleaseDate('');
  };

  // When iteration type changes, auto-generate version number
  const handleIterationChange = (type: IterationType) => {
    setIterationType(type);
    if (projectName) {
      const next = getNextVersion(existingVersions, projectName, type);
      setVersionNumber(next);
    }
  };

  const handleVersionInput = (val: string) => {
    // Only allow digits and dots
    const cleaned = val.replace(/[^\d.]/g, '');
    setVersionNumber(cleaned);
  };

  const applyRecommendedReleaseDate = (type: VersionDevelopmentType, productDesigned: boolean) => {
    setExpectedReleaseDate(getRecommendedExpectedReleaseDate(type, new Date(), { productDesignCompleted: productDesigned }));
  };

  const handleDevelopmentTypeChange = (type: VersionDevelopmentType) => {
    setDevelopmentType(type);
    applyRecommendedReleaseDate(type, productDesignCompleted);
  };

  const handleProductDesignCompletedChange = (completed: boolean) => {
    setProductDesignCompleted(completed);
    if (developmentType) applyRecommendedReleaseDate(developmentType, completed);
  };

  const selectedDevelopmentType = developmentType ? getVersionDevelopmentTypeOption(developmentType) : undefined;
  const recommendedWorkDays = selectedDevelopmentType
    ? getRecommendedWorkDays(selectedDevelopmentType, { productDesignCompleted })
    : 0;

  const canSubmit = canSubmitNewVersionForm({
    productId,
    projectId,
    versionNumber,
    developmentType,
    expectedReleaseDate,
    submitting,
  });

  const handleSubmit = async () => {
    if (!canSubmit) return;
    setSubmitting(true);
    try {
      await onCreate(productId, {
        name: `${projectName}V${versionNumber}`,
        status,
        priority,
        expectedReleaseDate,
        members: currentUserName ? [{ role: 'product', name: currentUserName }] : [],
      });
      onClose();
    } catch (e) {
      setSubmitting(false);
    }
  };

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40" onClick={onClose}>
      <div className="max-h-[90vh] w-full max-w-md overflow-y-auto rounded-2xl bg-[var(--bg-card)] p-6 shadow-[var(--shadow-md)]" onClick={(e) => e.stopPropagation()}>
        <div className="flex items-center justify-between mb-5">
          <h2 className="text-[15px] font-semibold text-[var(--ink)]">新建版本</h2>
          <button onClick={onClose} className="rounded-lg p-1 text-[var(--ink-muted)] hover:bg-[var(--bg-hover)] transition-colors">
            <X className="h-4 w-4" strokeWidth={2} />
          </button>
        </div>

        <div className="space-y-4">
          {/* 产品选择 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">产品选择<span className="text-red-500">*</span></label>
            <select value={productId} onChange={(e) => handleProductChange(e.target.value)} className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] text-[var(--ink)] focus:border-[var(--accent)] focus:outline-none focus:ring-2 focus:ring-[var(--accent-ring)]">
              <option value="">请选择产品</option>
              {overview.map((p: any) => <option key={p.id} value={p.id}>{p.name}</option>)}
            </select>
          </div>

          {/* 项目选择 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">项目选择<span className="text-red-500">*</span></label>
            <select value={projectId} onChange={(e) => handleProjectChange(e.target.value)} disabled={!productId} className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] text-[var(--ink)] disabled:opacity-50 focus:border-[var(--accent)] focus:outline-none focus:ring-2 focus:ring-[var(--accent-ring)]">
              <option value="">请选择项目</option>
              {projects.map((p: any) => <option key={p.id} value={p.id}>{p.name}</option>)}
            </select>
          </div>

          {/* 迭代类型 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">迭代类型<span className="text-red-500">*</span></label>
            <div className="grid grid-cols-3 gap-2">
              {([
                { key: 'major' as const, label: '大版本', hint: 'X.0' },
                { key: 'minor' as const, label: '中版本', hint: '1.X' },
                { key: 'patch' as const, label: '小版本', hint: '1.2.X' },
              ]).map((opt) => (
                <button key={opt.key} onClick={() => handleIterationChange(opt.key)} disabled={!projectId} className={`flex flex-col items-center gap-0.5 rounded-lg border px-3 py-2 transition-colors disabled:opacity-50 ${iterationType === opt.key ? 'border-[var(--accent)] bg-[var(--accent-soft)] text-[var(--accent)]' : 'border-[var(--line)] bg-[var(--bg-card)] text-[var(--ink-soft)] hover:border-[var(--accent)]'}`}>
                  <span className="text-[12px] font-medium">{opt.label}</span>
                  <span className="text-[10px] text-[var(--ink-muted)] tabular-nums">{opt.hint}</span>
                </button>
              ))}
            </div>
          </div>

          {/* 版本号 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">版本号</label>
            <input value={versionNumber} onChange={(e) => handleVersionInput(e.target.value)} placeholder="1.0" className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] tabular-nums text-[var(--ink)] placeholder:text-[var(--ink-muted)] focus:border-[var(--accent)] focus:outline-none focus:ring-2 focus:ring-[var(--accent-ring)]" />
            {projectName && versionNumber && (
              <p className="mt-1.5 text-[11px] text-[var(--ink-muted)]">将创建：<span className="font-medium text-[var(--ink-soft)]">{projectName}V{versionNumber}</span></p>
            )}
          </div>

          {/* 状态 */}


          {/* 优先级 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">优先级</label>
            <div className="grid grid-cols-3 gap-2">
              {(['P0', 'P1', 'P2', 'P3', 'P4'] as Priority[]).map((p) => (
                <button key={p} onClick={() => setPriority(p)} className={`h-9 rounded-lg border px-3 text-[12px] font-medium transition-colors ${priority === p ? 'border-[var(--accent)] bg-[var(--accent-soft)] text-[var(--accent)]' : 'border-[var(--line)] bg-[var(--bg-card)] text-[var(--ink-soft)] hover:border-[var(--accent)]'}`}>
                  {p}
                </button>
              ))}
            </div>
          </div>

          {/* 项目开发类型 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">项目开发类型<span className="text-red-500">*</span></label>
            <div className="grid grid-cols-2 gap-2">
              {VERSION_DEVELOPMENT_TYPE_OPTIONS.map((opt) => (
                <button
                  key={opt.key}
                  onClick={() => handleDevelopmentTypeChange(opt.key)}
                  type="button"
                  className={`rounded-lg border px-3 py-2 text-left transition-colors ${developmentType === opt.key ? 'border-[var(--accent)] bg-[var(--accent-soft)] text-[var(--accent)]' : 'border-[var(--line)] bg-[var(--bg-card)] text-[var(--ink-soft)] hover:border-[var(--accent)]'}`}
                >
                  <span className="block text-[12px] font-medium">{opt.label}</span>
                  <span className="mt-0.5 block text-[10px] text-[var(--ink-muted)]">{opt.description}</span>
                </button>
              ))}
            </div>
          </div>

          {/* 产品设计是否已完成 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">产品设计是否已完成</label>
            <div className="grid grid-cols-2 gap-2">
              <button
                type="button"
                onClick={() => handleProductDesignCompletedChange(false)}
                className={`h-9 rounded-lg border px-3 text-[12px] font-medium transition-colors ${!productDesignCompleted ? 'border-[var(--accent)] bg-[var(--accent-soft)] text-[var(--accent)]' : 'border-[var(--line)] bg-[var(--bg-card)] text-[var(--ink-soft)] hover:border-[var(--accent)]'}`}
              >
                否，计入产品设计
              </button>
              <button
                type="button"
                onClick={() => handleProductDesignCompletedChange(true)}
                className={`h-9 rounded-lg border px-3 text-[12px] font-medium transition-colors ${productDesignCompleted ? 'border-[var(--accent)] bg-[var(--accent-soft)] text-[var(--accent)]' : 'border-[var(--line)] bg-[var(--bg-card)] text-[var(--ink-soft)] hover:border-[var(--accent)]'}`}
              >
                是，只算开发测试
              </button>
            </div>
          </div>

          {/* 期望发版日期 */}
          <div>
            <label className="mb-1.5 block text-[12px] font-medium text-[var(--ink-soft)]">期望发版日期<span className="text-red-500">*</span></label>
            <input
              type="date"
              value={expectedReleaseDate}
              onChange={(e) => setExpectedReleaseDate(e.target.value)}
              required
              className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] text-[var(--ink)] focus:border-[var(--accent)] focus:outline-none focus:ring-2 focus:ring-[var(--accent-ring)]"
            />
            {selectedDevelopmentType && (
              <p className="mt-1.5 text-[11px] leading-5 text-[var(--ink-muted)]">
                推荐周期 {recommendedWorkDays} 个工作日：
                {selectedDevelopmentType.stages.map((stage, index) => {
                  const skipped = productDesignCompleted && stage.key === 'product_design';
                  return (
                    <span key={stage.key}>
                      {index > 0 && ' + '}
                      <span className={skipped ? 'text-[var(--ink-muted)] line-through' : ''}>
                        {stage.label}{stage.workDays}天
                      </span>
                    </span>
                  );
                })}
              </p>
            )}
          </div>
        </div>

        <div className="mt-6 flex justify-end gap-2">
          <button onClick={onClose} className="h-9 rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-4 text-[13px] text-[var(--ink-soft)] hover:bg-[var(--bg-hover)] transition-colors">取消</button>
          <button onClick={handleSubmit} disabled={!canSubmit} className="h-9 rounded-lg bg-[var(--accent)] px-4 text-[13px] font-medium text-white shadow-[var(--shadow-sm)] hover:bg-[var(--accent-hover)] transition-colors disabled:opacity-50 disabled:cursor-not-allowed">
            {submitting ? '提交中…' : '创建'}
          </button>
        </div>
      </div>
    </div>
  );
}