import dayjs from "dayjs";

/** 展示：2026-01-23 11:39:09 */
export function formatDateTime(value) {
  if (value == null || value === "") {
    return "-";
  }
  const d = dayjs(value);
  return d.isValid() ? d.format("YYYY-MM-DD HH:mm:ss") : String(value);
}

/** 展示：2026-01-23 */
export function formatDate(value) {
  const normalized = normalizeDateValue(value);
  if (normalized == null || normalized === "") {
    return "-";
  }
  const d = dayjs(normalized);
  return d.isValid() ? d.format("YYYY-MM-DD") : String(normalized);
}

/** 兼容 Jackson LocalDateTime 数组 / 对象 / 字符串 */
export function normalizeDateValue(value) {
  if (value == null || value === "") {
    return null;
  }
  if (typeof value === "string" || typeof value === "number") {
    return value;
  }
  if (dayjs.isDayjs(value)) {
    return value;
  }
  if (Array.isArray(value)) {
    const [y, mo, d, h = 0, mi = 0, s = 0] = value;
    return new Date(y, mo - 1, d, h, mi, s);
  }
  if (typeof value === "object") {
    const y = value.year ?? value.y;
    const mo = value.monthValue ?? value.month ?? value.m;
    const d = value.dayOfMonth ?? value.day ?? value.d;
    if (y != null && mo != null && d != null) {
      return new Date(y, mo - 1, d);
    }
  }
  return null;
}

/** 提交 API：日期 */
export function toApiDate(value) {
  if (value == null || value === "") {
    return undefined;
  }
  if (typeof value === "string") {
    return value.length > 10 ? value.slice(0, 10) : value;
  }
  const d = dayjs(value);
  return d.isValid() ? d.format("YYYY-MM-DD") : undefined;
}

/** 提交 API：日期时间 */
export function toApiDateTime(value) {
  if (value == null || value === "") {
    return undefined;
  }
  if (typeof value === "string") {
    return value;
  }
  const d = dayjs(value);
  return d.isValid() ? d.format("YYYY-MM-DDTHH:mm:ss") : undefined;
}

/** DatePicker 回显 */
export function toDayjs(value) {
  if (value == null || value === "") {
    return undefined;
  }
  const d = dayjs(value);
  return d.isValid() ? d : undefined;
}