/* eslint-disable @typescript-eslint/no-explicit-any */
import { useState, useEffect } from "react";
import { useLocation } from "react-router-dom";
import { useConfirm } from "@/components/ui/confirm-dialog";
import { Badge } from "@/components/ui/badge";
import { toast } from "sonner";
import { CheckCircle, XCircle, Settings, Users, Shield } from "lucide-react";
import { PageShell } from "@/components/layout/PageShell";
import { userApi } from "@/api";
import type { Role } from "@/types";
import { SystemUserTab } from "./SystemUserTab";
import { SystemRolesTab } from "./SystemRolesTab";
import { SystemSettingsTab } from "./SystemSettingsTab";
import { ResetPasswordDialog } from "./ResetPasswordDialog";
import { useLdapManagement } from "./useLdapManagement";
import { useAuditSettings } from "./useAuditSettings";
import type { UserFormData } from "./UserFormDialog";
import { useTranslation } from "react-i18next";

// 后端用户数据转换为前端兼容格式
function mapUser(u: any) {
  return {
    ...u,
    status:
      u.status === 1 || u.status === "active"
        ? ("active" as const)
        : ("inactive" as const),
    roles: Array.isArray(u.roles) ? u.roles : u.role ? [u.role] : [],
    lastLoginAt: u.last_login ?? u.lastLoginAt,
    createdAt: u.created_at ?? u.createdAt,
    authSource: u.auth_source ?? u.authSource ?? "local",
  };
}

const emptyForm: UserFormData = {
  username: "",
  nickname: "",
  email: "",
  phone: "",
  role: "",
  password: "",
  status: 1 as number,
};

export function SystemManager() {
  const { t } = useTranslation();
  const confirm = useConfirm();
  const location = useLocation();
  // 侧边栏菜单路径映射到 Tab // Logan.Li
  // 侧边栏已有独立菜单项，按路由直接渲染对应页面，不再重复 Tab // Logan.Li
  const pathToTab: Record<string, "users" | "roles" | "settings"> = {
    "/users": "users",
    "/roles": "roles",
    "/settings": "settings",
  };
  const activeTab = pathToTab[location.pathname] || "users";

  const pageMeta: Record<
    string,
    { title: string; subtitle: string; icon: React.ReactNode }
  > = {
    users: {
      title: t("system.users"),
      subtitle: t("system.localUserDesc"),
      icon: <Users className="h-5 w-5" />,
    },
    roles: {
      title: t("system.roles"),
      subtitle: t("system.roleBindingHint"),
      icon: <Shield className="h-5 w-5" />,
    },
    settings: {
      title: t("system.settings"),
      subtitle: t("system.generalSubtitle"),
      icon: <Settings className="h-5 w-5" />,
    },
  };
  const meta = pageMeta[activeTab];
  const [searchQuery, setSearchQuery] = useState("");
  const [users, setUsers] = useState<any[]>([]);
  const [loading, setLoading] = useState(true);
  const [selectedUser, setSelectedUser] = useState<any | null>(null);
  const [resetPasswordUser, setResetPasswordUser] = useState<any | null>(null);
  const [selectedRole, setSelectedRole] = useState<Role | null>(null);

  // 创建/编辑用户弹窗
  const [dialogOpen, setDialogOpen] = useState(false);
  const [editingUser, setEditingUser] = useState<any | null>(null);
  const [saving, setSaving] = useState(false);
  const [form, setForm] = useState<UserFormData>({ ...emptyForm });

  // CSV 批量导入弹窗
  const [importDialogOpen, setImportDialogOpen] = useState<
    "csv" | "ldap" | null
  >(null);
  const [importPreview, setImportPreview] = useState<any[]>([]);
  const [importResult, setImportResult] = useState<any>(null);
  const [selectedUserIds, setSelectedUserIds] = useState<number[]>([]);

  const loadUsers = async () => {
    setLoading(true);
    try {
      const res = await userApi.getUsers({ page: 1, page_size: 100 });
      const rawUsers = res?.list ?? [];
      setUsers(rawUsers.map(mapUser));
    } catch (error) {
      console.error("Failed to fetch users:", error);
      setUsers([]);
    } finally {
      setLoading(false);
    }
  };

  // LDAP 状态全部由 hook 管理（在 loadUsers 之后调用避免 TDZ） // Logan.Li
  const ldap = useLdapManagement(loadUsers);
  const audit = useAuditSettings();

  useEffect(() => {
    loadUsers();
    ldap.loadLdapConfig();
  // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  // LDAP 导入 Dialog 打开时加载 OU 和用户
  useEffect(() => {
    if (importDialogOpen === "ldap") {
      ldap.loadImportDialogData();
    }
  // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [importDialogOpen]);

  const filteredUsers = users.filter(
    (u) =>
      (u.username || "").toLowerCase().includes(searchQuery.toLowerCase()) ||
      (u.nickname || "").toLowerCase().includes(searchQuery.toLowerCase()) ||
      (u.email || "").toLowerCase().includes(searchQuery.toLowerCase()),
  );

  const getUserStatusBadge = (status: "active" | "inactive") => {
    return status === "active" ? (
      <Badge
        variant="outline"
        className="border-[var(--dg-green)]/30 text-[var(--dg-green)] bg-[var(--dg-green)]/10"
      >
        <CheckCircle className="h-3 w-3 mr-1" />
        {t("common.normal")}
      </Badge>
    ) : (
      <Badge
        variant="outline"
        className="border-[var(--dg-text-muted)]/30 text-[var(--dg-text-muted)] bg-[var(--dg-text-muted)]/10"
      >
        <XCircle className="h-3 w-3 mr-1" />
        {t("system.userInactive")}
      </Badge>
    );
  };

  const openCreate = () => {
    setEditingUser(null);
    setForm({ ...emptyForm });
    setDialogOpen(true);
  };

  const openEdit = (user: any) => {
    setEditingUser(user);
    setForm({
      username: user.username || "",
      nickname: user.nickname || "",
      email: user.email || "",
      phone: user.phone || "",
      role: Array.isArray(user.roles) ? user.roles[0] || "" : user.role || "",
      password: "",
      status: user.status === "active" ? 1 : 0,
    });
    setDialogOpen(true);
  };

  const handleSubmit = async () => {
    setSaving(true);
    try {
      const payload: Record<string, unknown> = {
        username: form.username,
        nickname: form.nickname,
        email: form.email,
        phone: form.phone,
        role: form.role,
        status: form.status,
      };
      if (form.password) {
        payload.password = form.password;
      }
      if (editingUser) {
        await userApi.updateUser(editingUser.id, payload);
      } else {
        await userApi.createUser(payload);
      }
      setDialogOpen(false);
      await loadUsers();
    } catch (error) {
      console.error("Failed to save user:", error);
    } finally {
      setSaving(false);
    }
  };

  const handleDelete = async (user: any) => {
    const ok = await confirm({
      title: t("system.deleteUser"),
      description: t('system.deleteUserConfirmDesc', { name: user.nickname || user.username }),
      confirmText: t("common.delete"),
      variant: "destructive",
    });
    if (!ok) return;
    try {
      await userApi.deleteUser(user.id);
      setSelectedUserIds((prev) => prev.filter((id) => id !== user.id));
      await loadUsers();
      toast.success(t("system.userDeleted"));
    } catch (error: unknown) {
      toast.error(
        error instanceof Error ? error.message : t("common.deleteFailed"),
      );
    }
  };

  const handleBatchDelete = async () => {
    if (selectedUserIds.length === 0) return;
    const ok = await confirm({
      title: t("system.batchDeleteUsers"),
      description: t("system.batchDeleteUsersConfirmDesc", { count: selectedUserIds.length }),
      confirmText: t("system.terminalBatchDelete"),
      variant: "destructive",
    });
    if (!ok) return;
    try {
      const res = (await userApi.batchDelete(selectedUserIds)) as {
        message?: string;
      };
      toast.success(res?.message || t('system.batchDeleteUsers', { count: selectedUserIds.length }));
      setSelectedUserIds([]);
      await loadUsers();
    } catch (error: unknown) {
      toast.error(
        error instanceof Error ? error.message : t("cloud.batchDeleteFailed"),
      );
    }
  };

  // CSV 文件解析
  const handleCsvUpload = (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    if (!file) return;
    const reader = new FileReader();
    reader.onload = (ev) => {
      const text = ev.target?.result as string;
      const lines = text
        .split("\n")
        .filter((l) => l.trim() && !l.startsWith("\xEF\xBB\xBF"));
      if (lines.length < 2) return;
      // Find column indices from header
      const headers = lines[0].split(",").map((h) => h.trim().toLowerCase());
      const idxUsername = headers.findIndex(
        (h) => h.includes("用户名") || h.includes("username"),
      );
      const idxNickname = headers.findIndex(
        (h) => h.includes("昵称") || h.includes("name") || h.includes("显示名"),
      );
      const idxEmail = headers.findIndex(
        (h) => h.includes("邮箱") || h.includes("email") || h.includes("mail"),
      );
      const idxPhone = headers.findIndex(
        (h) => h.includes("手机") || h.includes("phone"),
      );
      const idxRole = headers.findIndex(
        (h) => h.includes("角色") || h.includes("role"),
      );
      const idxPassword = headers.findIndex(
        (h) => h.includes("密码") || h.includes("password"),
      );

      const parsed: Record<string, unknown>[] = [];
      for (let i = 1; i < lines.length; i++) {
        const cols = lines[i].split(",").map((c) => c.trim());
        parsed.push({
          username: idxUsername >= 0 ? cols[idxUsername] : "",
          nickname: idxNickname >= 0 ? cols[idxNickname] : "",
          email: idxEmail >= 0 ? cols[idxEmail] : "",
          phone: idxPhone >= 0 ? cols[idxPhone] : "",
          role: idxRole >= 0 ? cols[idxRole] : "",
          password: idxPassword >= 0 ? cols[idxPassword] : "",
        });
      }
      setImportPreview(parsed);
      setImportResult(null);
    };
    reader.readAsText(file, "UTF-8");
  };

  // 执行 CSV 批量导入
  const handleBatchImport = async () => {
    ldap.setImporting(true);
    try {
      const res = await userApi.batchImport({
        users: importPreview,
        skip_existing: true,
      });
      setImportResult(res);
      await loadUsers();
    } catch (error) {
      setImportResult({
        code: 500,
        message: error?.message || t("system.importFailed"),
      });
    } finally {
      ldap.setImporting(false);
    }
  };

  return (
    <PageShell
      variant={activeTab === "settings" ? "config" : "list"}
      maxWidth={activeTab === "settings" ? "xl" : "full"}
      title={meta.title}
      subtitle={meta.subtitle}
      icon={meta.icon}
    >
      <div className="w-full">
        {activeTab === "users" && (
          <div className="space-y-4">
            <SystemUserTab
              searchQuery={searchQuery}
              setSearchQuery={setSearchQuery}
              filteredUsers={filteredUsers}
              loading={loading}
              selectedUser={selectedUser}
              setSelectedUser={setSelectedUser}
              getUserStatusBadge={getUserStatusBadge}
              dialogOpen={dialogOpen}
              setDialogOpen={setDialogOpen}
              editingUser={editingUser}
              form={form}
              setForm={setForm}
              saving={saving}
              handleSubmit={handleSubmit}
              openCreate={openCreate}
              openEdit={openEdit}
              handleDelete={handleDelete}
              handleBatchDelete={handleBatchDelete}
              selectedUserIds={selectedUserIds}
              setSelectedUserIds={setSelectedUserIds}
              onResetPassword={(u) => {
                setSelectedUser(null);
                setResetPasswordUser(u);
              }}
              importDialogOpen={importDialogOpen}
              setImportDialogOpen={setImportDialogOpen}
              importPreview={importPreview}
              setImportPreview={setImportPreview}
              importing={ldap.importing}
              importResult={importResult}
              setImportResult={setImportResult}
              handleCsvUpload={handleCsvUpload}
              handleBatchImport={handleBatchImport}
              ldapUsers={ldap.ldapUsers}
              ldapSelected={ldap.ldapSelected}
              setLdapSelected={ldap.setLdapSelected}
              ldapLoading={ldap.ldapLoading}
              ldapImportOUs={ldap.ldapImportOUs}
              ldapImportOUDN={ldap.ldapImportOUDN}
              setLdapImportOUDN={ldap.setLdapImportOUDN}
              loadLdapUsers={ldap.loadLdapUsers}
              handleLdapImport={() =>
                ldap.handleLdapImport({ setResult: setImportResult })
              }
              setLdapUsers={ldap.setLdapUsers}
            />
          </div>
        )}

        {activeTab === "roles" && (
          <SystemRolesTab
            selectedRole={selectedRole}
            setSelectedRole={setSelectedRole}
          />
        )}

        {activeTab === "settings" && (
          <SystemSettingsTab
            {...ldap.settingsTabProps}
            auditRetentionDays={audit.retentionDays}
            setAuditRetentionDays={audit.setRetentionDays}
            auditRecordAll={audit.recordAll}
            setAuditRecordAll={audit.setRecordAll}
            sessionWatermarkEnabled={audit.sessionWatermarkEnabled}
            setSessionWatermarkEnabled={audit.setSessionWatermarkEnabled}
            sessionRecordEnabled={audit.sessionRecordEnabled}
            setSessionRecordEnabled={audit.setSessionRecordEnabled}
            clipboardEnabled={audit.clipboardEnabled}
            setClipboardEnabled={audit.setClipboardEnabled}
            fileUploadEnabled={audit.fileUploadEnabled}
            setFileUploadEnabled={audit.setFileUploadEnabled}
            fileDownloadEnabled={audit.fileDownloadEnabled}
            setFileDownloadEnabled={audit.setFileDownloadEnabled}
            commandPolicyEnabled={audit.commandPolicyEnabled}
            setCommandPolicyEnabled={audit.setCommandPolicyEnabled}
            approvalRequired={audit.approvalRequired}
            setApprovalRequired={audit.setApprovalRequired}
            auditLoading={audit.loading}
            auditApplying={audit.applying}
            handleAuditApply={audit.handleApply}
            auditLastCleanupText={audit.lastCleanupText}
            auditRetentionOptions={audit.retentionOptions}
          />
        )}
      </div>

      <ResetPasswordDialog
        user={resetPasswordUser}
        onClose={() => setResetPasswordUser(null)}
      />
    </PageShell>
  );
}