// routes/api/delete/obligation.ts
import { deleteObligation } from "../../../services/financhalServices.ts";
import { define } from "../../../utils.ts";
import { SessionCookie } from "../../auth/callback.ts";
import { invalidateBalanceCache } from "../../../services/dailyBalanceCache.ts";

export const handler = define.handlers({
  async POST(ctx) {
    const formData = await ctx.req.formData();
    const obligation_id = formData.get("obligation_id");
    const sender = formData.get("sender");

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

    // Get user_id from session for cache invalidation
    const stateData: SessionCookie = ctx.state.data;

    // Delete the obligation using your service function
    await deleteObligation(obligation_id.toString());

    // Invalidate balance cache for this user
    if (stateData.user_id) {
      try {
        await invalidateBalanceCache(stateData.user_id);
      } catch (cacheError) {
        console.error("Failed to invalidate cache:", cacheError);
        // Non-fatal error - continue with redirect
      }
    }

    // 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);
  },
});