import dayjs from "dayjs";

export const EXPENSE_CATEGORY_OPTIONS = [
  { label: "差旅", value: "travel" },
  { label: "办公采购", value: "office_procurement" },
  { label: "业务招待", value: "business_entertainment" },
  { label: "交通费", value: "transport" },
  { label: "通讯费", value: "communication" },
  { label: "其他", value: "other" },
];

export const EXPENSE_SUBJECT_OPTIONS = [
  { label: "交通费", value: "transport" },
  { label: "住宿费", value: "hotel" },
  { label: "餐饮费", value: "meal" },
  { label: "办公用品", value: "office_supply" },
  { label: "招待费", value: "entertainment" },
  { label: "通讯费", value: "phone" },
  { label: "其他", value: "other" },
];

export const CATEGORY_TEMPLATES = {
  travel: {
    label: "差旅费用",
    reason: "因公出差产生的交通、住宿、餐饮等费用报销。",
    details: [
      { expenseSubject: "transport", description: "往返交通费" },
      { expenseSubject: "hotel", description: "住宿费" },
      { expenseSubject: "meal", description: "出差餐饮" },
    ],
  },
  office_procurement: {
    label: "办公采购",
    reason: "部门日常办公用品、耗材采购报销。",
    details: [
      { expenseSubject: "office_supply", description: "办公用品采购" },
      { expenseSubject: "office_supply", description: "打印耗材" },
    ],
  },
  business_entertainment: {
    label: "业务招待",
    reason: "客户接待、商务宴请等费用报销。",
    details: [
      { expenseSubject: "entertainment", description: "客户接待餐费" },
      { expenseSubject: "entertainment", description: "商务礼品" },
    ],
  },
  transport: {
    label: "交通费",
    reason: "市内通勤、打车、停车等交通费用报销。",
    details: [{ expenseSubject: "transport", description: "市内交通" }],
  },
  communication: {
    label: "通讯费",
    reason: "因公通讯、流量、话费补贴报销。",
    details: [{ expenseSubject: "phone", description: "话费/流量" }],
  },
  other: {
    label: "其他费用",
    reason: "其他因公支出费用报销。",
    details: [{ expenseSubject: "other", description: "其他费用" }],
  },
};

export function expenseSubjectLabel(v) {
  return EXPENSE_SUBJECT_OPTIONS.find(x => x.value === v)?.label || "—";
}

export function expenseCategoryLabel(v) {
  return EXPENSE_CATEGORY_OPTIONS.find(x => x.value === v)?.label || v || "—";
}

export function expenseTypeToCategory(expenseType) {
  const t = (expenseType || "").trim();
  const hit = EXPENSE_CATEGORY_OPTIONS.find(x => x.label === t || x.value === t);
  return hit?.value || "other";
}

export function createEmptyExpenseDetail() {
  return {
    id: `ed_${Date.now()}_${Math.random().toString(36).slice(2, 7)}`,
    invoiceDate: "",
    expenseSubject: "",
    amount: "",
    description: "",
  };
}

export function createEmptyCostForm() {
  return {
    reimbursementId: undefined,
    applicantId: "",
    employeeNo: "",
    employeeName: "",
    expenseCategory: "other",
    reimburseReason: "",
    applyAmount: "",
    payee: "",
    payeeAccount: "",
    bankBranch: "",
    expenseDetails: [],
    attachmentList: [],
    approvalFlowNodes: [{ approverId: "", approverName: "", nodeOrder: 1, signMode: "countersign" }],
    deptId: "",
    deptName: "",
  };
}

export function applyCategoryTemplate(form, category) {
  const tpl = CATEGORY_TEMPLATES[category];
  if (!tpl) return;
  form.expenseCategory = category;
  if (!form.reimburseReason?.trim()) form.reimburseReason = tpl.reason;
  form.expenseDetails = (tpl.details || []).map(d => ({
    ...createEmptyExpenseDetail(),
    expenseSubject: d.expenseSubject,
    description: d.description,
    invoiceDate: dayjs().format("YYYY-MM-DD"),
  }));
}