import dayjs from "dayjs";

/** 新闻分类：统一信息出口 */
export const NEWS_TYPE_OPTIONS = [
  { value: "announcement", label: "企业公告", color: "#409eff" },
  { value: "policy", label: "政策解读", color: "#e6a23c" },
  { value: "industry", label: "行业动态", color: "#909399" },
  { value: "culture", label: "文化活动", color: "#67c23a" },
];

/** 发布状态 */
export const PUBLISH_STATUS_OPTIONS = [
  { value: "draft", label: "草稿", tag: "info" },
  { value: "pending_review", label: "待审核", tag: "warning" },
  { value: "published", label: "已发布", tag: "success" },
  { value: "archived", label: "已归档", tag: "" },
];

/** 排版模板 */
export const LAYOUT_TEMPLATE_OPTIONS = [
  { value: "standard", label: "标准图文" },
  { value: "policy", label: "政策条文" },
  { value: "gallery", label: "图集相册" },
  { value: "briefing", label: "简报摘要" },
];

/** 阅读可见范围 */
export const READ_SCOPE_OPTIONS = [
  { value: "all", label: "全员可见" },
  { value: "management", label: "管理层" },
  { value: "department", label: "指定部门" },
  { value: "custom", label: "自定义名单" },
];

/** 编辑/审核角色（发布权限） */
export const PUBLISH_ROLE_OPTIONS = [
  { value: "hr", label: "HR（人事政策）" },
  { value: "admin", label: "管理员（外部新闻审核）" },
  { value: "dept_manager", label: "部门负责人" },
  { value: "editor", label: "内容编辑" },
];

export const STORAGE_KEY = "oa_enterprise_news_v1";

/** 目标受众（对接组织架构 API 前为空） */
export const MOCK_AUDIENCE = [];

const DEPT_OPTIONS = [
  { value: "101", label: "研发部" },
  { value: "102", label: "销售部" },
  { value: "103", label: "行政部" },
  { value: "104", label: "财务部" },
  { value: "105", label: "总经办" },
  { value: "106", label: "人力资源部" },
];

export { DEPT_OPTIONS };

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

export function newsTypeColor(v) {
  return NEWS_TYPE_OPTIONS.find((x) => x.value === v)?.color || "#909399";
}

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

export function publishStatusTag(v) {
  return PUBLISH_STATUS_OPTIONS.find((x) => x.value === v)?.tag || "info";
}

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

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

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

export function createEmptyForm() {
  return {
    id: "",
    newsNo: "",
    title: "",
    summary: "",
    newsType: "announcement",
    layoutTemplate: "standard",
    contentHtml: "",
    coverImage: "",
    mediaList: [],
    attachmentList: [],
    editorRole: "hr",
    reviewerRole: "admin",
    readScope: "all",
    targetDeptIds: [],
    targetUserIds: [],
    publishStatus: "draft",
    publisherName: "",
    publishTime: "",
    readRecords: [],
    remindLogs: [],
    likes: [],
    comments: [],
    versions: [],
    versionNo: 1,
    requireReadConfirm: false,
  };
}

function buildReadRecords(readUserIds = []) {
  return (readUserIds || []).map((userId) => ({
    userId,
    employeeNo: "",
    name: "",
    deptName: "",
    readAt: "",
    lastRemindAt: "",
  }));
}

function createVersionSnapshot(row, changeNote = "发布") {
  return {
    versionNo: row.versionNo || 1,
    title: row.title,
    summary: row.summary,
    contentHtml: row.contentHtml,
    newsType: row.newsType,
    publishTime: row.publishTime || dayjs().format("YYYY-MM-DD HH:mm:ss"),
    archivedAt: dayjs().format("YYYY-MM-DD HH:mm:ss"),
    changeNote,
    publisherName: row.publisherName || "系统",
  };
}

/** @deprecated 不再注入演示数据，初始列表为空 */
export function createInitialMockNews() {
  return [];
}

export function loadStoredNews() {
  try {
    const raw = localStorage.getItem(STORAGE_KEY);
    if (!raw) return null;
    const data = JSON.parse(raw);
    return Array.isArray(data) ? data : null;
  } catch {
    return null;
  }
}

export function saveStoredNews(rows) {
  try {
    localStorage.setItem(STORAGE_KEY, JSON.stringify(rows));
  } catch {
    /* ignore */
  }
}

/** 按阅读范围解析目标受众 */
export function resolveTargetAudience(row) {
  const scope = row.readScope || "all";
  if (scope === "management") {
    return MOCK_AUDIENCE.filter((u) => u.isManagement);
  }
  if (scope === "department" && row.targetDeptIds?.length) {
    const names = DEPT_OPTIONS.filter((d) => row.targetDeptIds.includes(d.value)).map((d) => d.label);
    return MOCK_AUDIENCE.filter((u) => names.includes(u.deptName));
  }
  if (scope === "custom" && row.targetUserIds?.length) {
    return MOCK_AUDIENCE.filter((u) => row.targetUserIds.includes(u.userId));
  }
  return [...MOCK_AUDIENCE];
}

export function getUnreadEmployees(row) {
  const audience = resolveTargetAudience(row);
  const readSet = new Set(
    (row.readRecords || []).filter((r) => r.readAt).map((r) => r.userId)
  );
  return audience.filter((u) => !readSet.has(u.userId));
}

export function readRate(row) {
  const audience = resolveTargetAudience(row);
  if (!audience.length) return 0;
  const readCount = (row.readRecords || []).filter((r) => r.readAt).length;
  return Math.round((readCount / audience.length) * 100);
}

export function nextNewsNo() {
  return `EN${dayjs().format("YYYYMMDD")}${String(Math.floor(Math.random() * 9000) + 1000)}`;
}

export function pushVersionBeforeUpdate(row, changeNote) {
  const versions = row.versions || [];
  versions.unshift(createVersionSnapshot(row, changeNote));
  row.versions = versions;
  row.versionNo = (row.versionNo || 1) + 1;
}

export function validateNewsForm(form) {
  const title = (form.title || "").trim();
  if (!title) return { ok: false, message: "请填写新闻标题" };
  if (!form.newsType) return { ok: false, message: "请选择新闻分类" };
  if (form.readScope === "department" && !(form.targetDeptIds || []).length) {
    return { ok: false, message: "请选择可见部门" };
  }
  return { ok: true, title };
}