import jwt from "jsonwebtoken";
import Member from "../../models/member.js";
import Tag from "../../models/tag.js";
import { connectDB } from "../../utils/mongoose.js";

export default defineEventHandler(async (event) => {
  await connectDB();

  // Check if user is authenticated
  const token = getCookie(event, "auth-token");
  let isAuthenticated = false;

  if (token) {
    try {
      jwt.verify(token, useRuntimeConfig().jwtSecret);
      isAuthenticated = true;
    } catch (err) {
      isAuthenticated = false;
    }
  }

  const query = getQuery(event);
  const search = query.search || "";
  const circle = query.circle || "";
  const peerSupport = query.peerSupport || "";
  const craftTag = query.craftTag || "";
  const connectionTag = query.connectionTag || "";

  const dbQuery = {
    showInDirectory: true,
    status: "active",
  };

  if (circle) {
    dbQuery.circle = circle;
  }

  const andConditions = [];

  if (peerSupport === "true") {
    dbQuery["communityEcology.offerPeerSupport"] = true;
  }

  if (search) {
    // Escape regex metacharacters to prevent ReDoS
    const escaped = search.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
    andConditions.push({
      $or: [
        { name: { $regex: escaped, $options: "i" } },
        { bio: { $regex: escaped, $options: "i" } },
      ],
    });
  }

  if (craftTag) {
    dbQuery.craftTags = craftTag;
  }

  if (connectionTag) {
    dbQuery["communityEcology.topics.tagSlug"] = connectionTag;
  }

  if (andConditions.length > 0) {
    dbQuery.$and = andConditions;
  }

  try {
    const members = await Member.find(dbQuery)
      .select(
        "name pronouns timeZone avatar studio bio location socialLinks privacy circle craftTags communityEcology createdAt",
      )
      .sort({ createdAt: -1 })
      .lean();

    const filteredMembers = members.map((member) => {
      const privacy = member.privacy || {};
      const filtered = {
        _id: member._id,
        name: member.name,
        circle: member.circle,
        createdAt: member.createdAt,
      };

      const isVisible = (field) => {
        const privacySetting = privacy[field] || "members";
        if (privacySetting === "public") return true;
        if (privacySetting === "members" && isAuthenticated) return true;
        return false;
      };

      if (isVisible("avatar")) filtered.avatar = member.avatar;
      if (isVisible("pronouns")) filtered.pronouns = member.pronouns;
      if (isVisible("timeZone")) filtered.timeZone = member.timeZone;
      if (isVisible("studio")) filtered.studio = member.studio;
      if (isVisible("bio")) filtered.bio = member.bio;
      if (isVisible("location")) filtered.location = member.location;
      if (isVisible("socialLinks")) filtered.socialLinks = member.socialLinks;
      if (isVisible("craftTags")) filtered.craftTags = member.craftTags;

      if (isVisible("communityEcology")) {
        const ecology = member.communityEcology || {};
        filtered.communityEcology = {
          topics: ecology.topics,
          offerPeerSupport: ecology.offerPeerSupport,
          availability: ecology.availability,
          ...(ecology.offerPeerSupport && {
            slackHandle: ecology.slackHandle,
          }),
        };
      }

      return filtered;
    });

    const [craftTags, cooperativeTags] = await Promise.all([
      Tag.find({ pool: "craft", active: true }).sort({ label: 1 }).lean(),
      Tag.find({ pool: "cooperative", active: true }).sort({ label: 1 }).lean(),
    ]);

    return {
      members: filteredMembers,
      totalCount: filteredMembers.length,
      filters: {
        craftTags: craftTags.map((t) => ({ slug: t.slug, label: t.label })),
        cooperativeTags: cooperativeTags.map((t) => ({
          slug: t.slug,
          label: t.label,
        })),
      },
    };
  } catch (error) {
    console.error("Directory fetch error:", error);
    throw createError({
      statusCode: 500,
      message: "Failed to fetch member directory",
    });
  }
});