import { useMemo } from "react";
import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { fetchSystemNavigation, fetchWorkspaceSettings, updateWorkspaceSettings } from "../api/workspace";
import { isApiError } from "../api/types";
import { mapApiErrorMessage } from "../api/errorMessages";
import { PageHeader } from "../components/common/PageHeader";
import { Button } from "../components/ui/button";
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "../components/ui/table";
import { toast } from "sonner";

const MODULE_LABELS: Record<string, string> = {
  portal: "Portal",
  team: "团队",
  leaveRequests: "请假",
  attendance: "考勤",
  reimbursements: "报销",
  assets: "资产",
  weeklyReports: "周报",
  todos: "待办",
  announcements: "公告",
  projects: "项目",
  workspace: "工作区设置",
  people: "人员管理",
  organization: "组织架构",
  contractsRegistry: "合同台账",
  workflowDefinitions: "流程定义",
  systemSettings: "系统设置",
  featureFlags: "功能开关",
  auditLogs: "审计日志",
  approvalRules: "审批规则",
  userManagement: "用户管理",
  departments: "部门管理",
  masterData: "主数据",
  notificationChannels: "通知渠道",
  workflowTasks: "审批待办",
  dashboard: "仪表盘",
  purchaseRequests: "采购申请",
  travelRequests: "差旅申请",
  budgets: "预算管理",
  paymentBatches: "支付批次",
  apOperations: "AP 运营",
  invoicePool: "票据中心",
  inventoryChecks: "资产盘点",
  cutover: "切换控制台",
  erpIntegrations: "ERP 集成",
  profile: "个人设置",
};

export function WorkspaceSetupPage() {
  const queryClient = useQueryClient();
  const workspaceQuery = useQuery({ queryKey: ["workspace-settings"], queryFn: fetchWorkspaceSettings });
  const navigationQuery = useQuery({ queryKey: ["system-navigation"], queryFn: fetchSystemNavigation });

  const mutation = useMutation({
    mutationFn: updateWorkspaceSettings,
    onSuccess: async () => {
      await Promise.all([
        queryClient.invalidateQueries({ queryKey: ["workspace-settings"] }),
        queryClient.invalidateQueries({ queryKey: ["system-navigation"] }),
        queryClient.invalidateQueries({ queryKey: ["portal-home"] }),
      ]);
      toast.success("工作区设置已保存");
    },
    onError: (error) => {
      const message = isApiError(error)
        ? `${error.code}: ${mapApiErrorMessage(error.code, error.details, error.message)}`
        : error instanceof Error
          ? error.message
          : "保存失败";
      toast.error(message);
    },
  });

  const workspace = workspaceQuery.data;
  const rolePresets = navigationQuery.data?.recommendedRolePresets ?? [];
  const moduleEntries = useMemo(() => Object.entries(workspace?.moduleVisibility ?? {}), [workspace?.moduleVisibility]);

  if (workspaceQuery.isLoading || !workspace) {
    return (
      <div className="space-y-6">
        <PageHeader
          title="工作区设置"
          subtitle="按 10 人以下小团队模式收敛主导航与默认入口。"
        />
        <div className="card-std p-6 text-sm text-zinc-500">加载工作区设置中...</div>
      </div>
    );
  }

  return (
    <div className="space-y-6">
      <PageHeader
        title="工作区设置"
        subtitle="按 10 人以下小团队模式收敛主导航与默认入口。"
      />

      <div className="grid gap-4 xl:grid-cols-3">
        <div className="card-std p-6">
          <div className="text-sm text-zinc-500">产品模式</div>
          <div className="mt-2 text-xl font-semibold text-zinc-900">{workspace.profile}</div>
          <div className="mt-3 text-sm text-zinc-600">单公司、账号密码、站内通知、桌面优先。</div>
        </div>
        <div className="card-std p-6">
          <div className="text-sm text-zinc-500">初始化状态</div>
          <div className="mt-2 text-xl font-semibold text-zinc-900">{workspace.persisted ? "已完成" : "待初始化"}</div>
          <div className="mt-3 text-sm text-zinc-600">首次管理员进入此页后保存一次，即完成小团队工作区初始化。</div>
        </div>
        <div className="card-std p-6">
          <div className="text-sm text-zinc-500">推荐角色预设</div>
          <div className="mt-3 space-y-2 text-sm">
            {rolePresets.map((item) => (
              <div key={item.key} className="rounded-lg border border-zinc-200 p-3">
                <div className="font-medium text-zinc-900">{item.label}</div>
                <div className="mt-1 text-zinc-600">{item.description}</div>
                <div className="mt-1 text-xs text-zinc-500">角色：{item.roleCodes.join(" / ")}</div>
              </div>
            ))}
          </div>
        </div>
      </div>

      <div className="card-std p-6 space-y-4">
        <div>
          <h3 className="text-base font-semibold text-zinc-900">模块显隐</h3>
          <p className="mt-1 text-sm text-zinc-500">主导航只保留高频入口；备用模块保留代码与数据，但默认放在管理员备用区。</p>
        </div>

        <Table>
          <TableHeader>
            <TableRow>
              <TableHead>模块</TableHead>
              <TableHead>当前显隐</TableHead>
              <TableHead>操作</TableHead>
            </TableRow>
          </TableHeader>
          <TableBody>
            {moduleEntries.map(([key, mode]) => (
              <TableRow key={key}>
                <TableCell>{MODULE_LABELS[key] ?? key}</TableCell>
                <TableCell>{mode}</TableCell>
                <TableCell>
                  <div className="flex flex-wrap gap-2">
                    {(["main", "admin", "hidden"] as const).map((nextMode) => (
                      <Button
                        key={nextMode}
                        size="sm"
                        variant={mode === nextMode ? "default" : "secondary"}
                        type="button"
                        disabled={mutation.isPending}
                        onClick={() => {
                          const nextVisibility = { ...(workspace.moduleVisibility ?? {}), [key]: nextMode };
                          mutation.mutate({ moduleVisibility: nextVisibility });
                        }}
                      >
                        {nextMode}
                      </Button>
                    ))}
                  </div>
                </TableCell>
              </TableRow>
            ))}
          </TableBody>
        </Table>
      </div>
    </div>
  );
}

export default WorkspaceSetupPage;