import { Router } from "express";
import type { Request, Response } from "express";
import { storage } from "../storage";

const router = Router();

/** GET /api/commissions/eligible
 * Query: npiProviderId (required), from?, to?
 */
router.get("/eligible", async (req: Request, res: Response): Promise<any> => {
  try {
    const npiProviderId = Number(req.query.npiProviderId);
    if (!npiProviderId || !Number.isFinite(npiProviderId)) {
      return res.status(400).json({ message: "npiProviderId is required" });
    }

    const from = req.query.from ? new Date(String(req.query.from)) : null;
    const to = req.query.to ? new Date(String(req.query.to)) : null;

    if (req.query.from && isNaN(from!.getTime()))
      return res.status(400).json({ message: "Invalid 'from' date" });
    if (req.query.to && isNaN(to!.getTime()))
      return res.status(400).json({ message: "Invalid 'to' date" });

    const payments = await storage.getEligiblePayments(npiProviderId, from, to);
    return res.json(payments);
  } catch (err: any) {
    console.error("GET /api/commissions/eligible error:", err);
    return res.status(500).json({ message: err?.message ?? "Failed to fetch eligible payments" });
  }
});

/** GET /api/commissions/batches
 * Query: npiProviderId? (optional filter)
 */
router.get("/batches", async (req: Request, res: Response): Promise<any> => {
  try {
    const npiProviderId = req.query.npiProviderId
      ? Number(req.query.npiProviderId)
      : undefined;
    const batches = await storage.getCommissionBatches(npiProviderId);
    return res.json(batches);
  } catch (err: any) {
    console.error("GET /api/commissions/batches error:", err);
    return res.status(500).json({ message: err?.message ?? "Failed to fetch commission batches" });
  }
});

/** POST /api/commissions
 * Body: { npiProviderId, paymentIds[], totalCollection, commissionAmount, notes? }
 */
router.post("/", async (req: Request, res: Response): Promise<any> => {
  try {
    const userId = req.user?.id;
    if (!userId) return res.status(401).json({ message: "Unauthorized" });

    const { npiProviderId, paymentIds, totalCollection, commissionAmount, notes } = req.body;

    if (!npiProviderId || !Array.isArray(paymentIds) || paymentIds.length === 0) {
      return res.status(400).json({ message: "npiProviderId and at least one paymentId are required" });
    }
    if (typeof totalCollection !== "number" || typeof commissionAmount !== "number") {
      return res.status(400).json({ message: "totalCollection and commissionAmount must be numbers" });
    }

    const batch = await storage.createCommissionBatch({
      npiProviderId: Number(npiProviderId),
      paymentIds: paymentIds.map(Number),
      totalCollection,
      commissionAmount,
      notes: notes ?? undefined,
    });

    return res.status(201).json(batch);
  } catch (err: any) {
    console.error("POST /api/commissions error:", err);
    return res.status(500).json({ message: err?.message ?? "Failed to create commission batch" });
  }
});

export default router;