import { computeUrlHash, normalizeUrl } from "@browser-bookmark/shared";
import { httpError } from "../lib/httpErrors.js";
import { requireAdmin, isAdminEmail } from "../lib/admin.js";
import { bookmarkRowToDto, folderRowToDto, userRowToDto } from "../lib/rows.js";

function toUserDtoWithAdminOverride(app, row) {
  const dto = userRowToDto(row);
  if (isAdminEmail(app, dto.email)) dto.role = "admin";
  return dto;
}

export async function adminRoutes(app) {
  app.get(
    "/admin/users",
    { preHandler: [async (req) => requireAdmin(app, req)] },
    async () => {
      const res = await app.pg.query(
        "select id, email, role, created_at, updated_at from users order by created_at desc limit 500"
      );
      return res.rows.map((r) => toUserDtoWithAdminOverride(app, r));
    }
  );

  app.get(
    "/admin/users/:id/folders",
    { preHandler: [async (req) => requireAdmin(app, req)] },
    async (req) => {
      const userId = req.params?.id;
      if (!userId) throw httpError(400, "user id required");
      const orderBy = app.features?.folderSortOrder
        ? "parent_id nulls first, sort_order asc, name asc"
        : "parent_id nulls first, name asc";
      const res = await app.pg.query(
        `select * from bookmark_folders where user_id=$1 order by ${orderBy} limit 1000`,
        [userId]
      );
      return res.rows.map(folderRowToDto);
    }
  );

  app.get(
    "/admin/users/:id/bookmarks",
    { preHandler: [async (req) => requireAdmin(app, req)] },
    async (req) => {
      const userId = req.params?.id;
      if (!userId) throw httpError(400, "user id required");

      const q = (req.query?.q || "").trim();
      const params = [userId];
      let where = "where user_id=$1 and deleted_at is null";
      if (q) {
        params.push(`%${q}%`);
        where += ` and (title ilike $${params.length} or url ilike $${params.length})`;
      }

      const orderBy = app.features?.bookmarkSortOrder
        ? "folder_id nulls first, sort_order asc, updated_at desc"
        : "updated_at desc";

      const res = await app.pg.query(
        `select * from bookmarks ${where} order by ${orderBy} limit 500`,
        params
      );
      return res.rows.map(bookmarkRowToDto);
    }
  );

  app.delete(
    "/admin/users/:userId/bookmarks/:bookmarkId",
    { preHandler: [async (req) => requireAdmin(app, req)] },
    async (req) => {
      const userId = req.params?.userId;
      const bookmarkId = req.params?.bookmarkId;
      if (!userId || !bookmarkId) throw httpError(400, "userId and bookmarkId required");

      const res = await app.pg.query(
        "update bookmarks set deleted_at=now(), updated_at=now() where id=$1 and user_id=$2 and deleted_at is null returning *",
        [bookmarkId, userId]
      );
      if (!res.rows[0]) throw httpError(404, "bookmark not found");
      return bookmarkRowToDto(res.rows[0]);
    }
  );

  app.delete(
    "/admin/users/:userId/folders/:folderId",
    { preHandler: [async (req) => requireAdmin(app, req)] },
    async (req) => {
      const userId = req.params?.userId;
      const folderId = req.params?.folderId;
      if (!userId || !folderId) throw httpError(400, "userId and folderId required");

      const res = await app.pg.query(
        "delete from bookmark_folders where id=$1 and user_id=$2 returning *",
        [folderId, userId]
      );
      if (!res.rows[0]) throw httpError(404, "folder not found");
      return folderRowToDto(res.rows[0]);
    }
  );

  app.post(
    "/admin/users/:userId/bookmarks/:bookmarkId/copy-to-me",
    { preHandler: [async (req) => requireAdmin(app, req)] },
    async (req) => {
      const sourceUserId = req.params?.userId;
      const bookmarkId = req.params?.bookmarkId;
      const adminUserId = req.adminUser?.id;
      if (!sourceUserId || !bookmarkId) throw httpError(400, "userId and bookmarkId required");
      if (!adminUserId) throw httpError(401, "unauthorized");

      const srcRes = await app.pg.query(
        "select * from bookmarks where id=$1 and user_id=$2 and deleted_at is null",
        [bookmarkId, sourceUserId]
      );
      const src = srcRes.rows[0];
      if (!src) throw httpError(404, "bookmark not found");

      const urlNormalized = normalizeUrl(src.url);
      const urlHash = computeUrlHash(urlNormalized);

      const existing = await app.pg.query(
        "select * from bookmarks where user_id=$1 and url_hash=$2 and deleted_at is null limit 1",
        [adminUserId, urlHash]
      );

      if (existing.rows[0]) {
        const merged = await app.pg.query(
          `update bookmarks
           set title=$1, url=$2, url_normalized=$3, visibility='private', folder_id=null, source='manual', updated_at=now()
           where id=$4
           returning *`,
          [src.title, src.url, urlNormalized, existing.rows[0].id]
        );
        return bookmarkRowToDto(merged.rows[0]);
      }

      const res = await app.pg.query(
        `insert into bookmarks (user_id, folder_id, title, url, url_normalized, url_hash, visibility, source)
         values ($1, null, $2, $3, $4, $5, 'private', 'manual')
         returning *`,
        [adminUserId, src.title, src.url, urlNormalized, urlHash]
      );
      return bookmarkRowToDto(res.rows[0]);
    }
  );
}