// routes/api/delete/users.ts
import { define } from "../../../utils.ts";
import { deleteUser, getUser } from "../../../services/userService.ts";
import { SessionCookie } from "../../auth/callback.ts";

export const handler = define.handlers({
  async POST(ctx) {
    const stateData: SessionCookie = ctx.state.data;
    const requestingUserId = stateData.user_id;
    const requestingUserRole = stateData.role;

    if (!requestingUserId) {
      return new Response(JSON.stringify({ error: "Unauthorized" }), {
        status: 401,
        headers: { "Content-Type": "application/json" },
      });
    }

    const formData = await ctx.req.formData();
    const user_id = formData.get("user_id");
    const sender = formData.get("sender");

    if (!user_id || !sender) {
      return new Response("Missing user_id or sender", { status: 400 });
    }

    const targetUserId = user_id.toString();

    if (requestingUserId === targetUserId) {
      return new Response(
        JSON.stringify({ error: "Cannot delete your own account" }),
        {
          status: 403,
          headers: { "Content-Type": "application/json" },
        },
      );
    }

    const targetUser = await getUser(targetUserId);
    if (!targetUser) {
      return new Response(JSON.stringify({ error: "User not found" }), {
        status: 404,
        headers: { "Content-Type": "application/json" },
      });
    }

    const isAdmin = requestingUserRole.includes("admin") ||
      targetUser.user_type === "admin";
    if (!isAdmin) {
      return new Response(JSON.stringify({ error: "Admin access required" }), {
        status: 403,
        headers: { "Content-Type": "application/json" },
      });
    }

    // Delete the user
    await deleteUser(targetUserId);

    // Redirect back to the sender URL (must be absolute)
    const senderPath = sender.toString();
    let redirectUrl = senderPath;
    try {
      if (senderPath.startsWith("/")) {
        const url = new URL(ctx.req.url);
        redirectUrl = url.origin + senderPath;
      }
    } catch (_) {
      // fallback: just use senderPath
    }
    return Response.redirect(redirectUrl, 303);
  },
});