import { z } from "zod";

export const lineItemSchema = z.object({
  name: z.string().min(1, "Item name is required"),
  description: z.string().optional(),
  quantity: z.coerce.number().positive("Quantity must be positive"),
  unit: z.string().min(1, "Unit is required"),
  size: z.string().optional(),
  unitPrice: z.coerce.number().nonnegative("Unit price must be non-negative"),
  gstRate: z.coerce.number().min(0).max(1).default(0.18),
  productId: z.string().optional(),
  accountId: z.string().optional(),
});

export const TC_FIXED_LINE =
  "Please quote this purchase order no. for further communications and invoices pertaining to this indent.";

export const TC_FIXED_LINE_2 =
  "We encourage bulk packaging and avoid plastic. No asbestos to be used in any product or packing material.";

export const TC_DEFAULTS = {
  tcDelivery:         "Within 4 to 5 days",
  tcDispatch:         "To be transported to site address as above. Freight Supplier's A/C",
  tcInspection:       "NA",
  tcTransitInsurance: "NA",
  tcPaymentTerms:     "Within 30 days from delivery.",
  tcOthers:           "",
};

export const createPoSchema = z.object({
  title: z.string().min(1, "Title is required").max(200),
  vesselId: z.string().min(1, "Cost Centre is required"),
  accountId: z.string().min(1, "Accounting Code is required"),
  projectCode: z.string().optional(),
  dateRequired: z.string().optional(),
  vendorId: z.string().optional(),
  currency: z.string().default("INR"),
  piQuotationNo: z.string().optional(),
  piQuotationDate: z.string().optional(),
  requisitionNo: z.string().optional(),
  requisitionDate: z.string().optional(),
  placeOfDelivery: z.string().optional(),
  tcDelivery: z.string().optional(),
  tcDispatch: z.string().optional(),
  tcInspection: z.string().optional(),
  tcTransitInsurance: z.string().optional(),
  tcPaymentTerms: z.string().optional(),
  tcOthers: z.string().optional(),
  lineItems: z.array(lineItemSchema).min(1, "At least one line item is required"),
});

export const approvePoSchema = z.object({
  note: z.string().optional(),
});

export const rejectPoSchema = z.object({
  note: z.string().min(1, "A rejection reason is required"),
});

export const requestEditsSchema = z.object({
  note: z.string().min(1, "Please specify what edits are needed"),
});

export const processPaymentSchema = z.object({
  paymentRef: z.string().min(1, "Payment reference is required"),
  paymentAmount: z.number().positive("Payment amount must be greater than 0").optional(),
});

export const confirmReceiptSchema = z.object({
  notes: z.string().optional(),
});

export type CreatePoInput = z.infer<typeof createPoSchema>;
export type LineItemInput = z.infer<typeof lineItemSchema>;