import { z } from "zod";
import {
  numberFromForm,
  numberInRange,
  nonNegativeNumberFromForm,
  positiveNumberFromForm,
  nullableIntIdFromForm,
  booleanFromForm,
  nullableIsoDateString,
  DocumentSectionSchema,
} from "./common";

const InvoiceItemSchema = z.object({
  description: z.string().max(500).nullish(),
  item_description: z.string().max(8000).nullish(),
  quantity: positiveNumberFromForm.default(1),
  unit: z.string().max(20).nullish(),
  unit_price: numberFromForm.default(0),
  // Per-item discount as a percentage (0–100); column is Decimal(5,2).
  discount: numberInRange(0, 100).optional().default(0),
  vat_rate: numberInRange(0, 100).optional().default(21.0),
  position: nonNegativeNumberFromForm.optional(),
});

export const CreateInvoiceSchema = z.object({
  invoice_number: z.string().max(50).nullish(),
  order_id: nullableIntIdFromForm.nullish(),
  customer_id: nullableIntIdFromForm.nullish(),
  status: z.string().max(20).optional().default("draft"),
  currency: z.string().max(10).optional().default("CZK"),
  vat_rate: numberInRange(0, 100).optional().default(21.0),
  apply_vat: booleanFromForm.optional().default(true),
  payment_method: z.string().max(50).nullish(),
  constant_symbol: z.string().max(20).nullish(),
  bank_name: z.string().max(255).nullish(),
  bank_swift: z.string().max(20).nullish(),
  bank_iban: z.string().max(50).nullish(),
  bank_account: z.string().max(50).nullish(),
  issue_date: nullableIsoDateString,
  due_date: nullableIsoDateString,
  tax_date: nullableIsoDateString,
  issued_by: z.string().max(255).nullish(),
  billing_text: z.string().max(500).nullish(),
  language: z.string().max(5).optional().default("cs"),
  // `notes` was dropped (printed-notes block removed — free-form PDF content
  // lives in the sections); legacy clients still sending it are silently
  // stripped by z.object. internal_notes is never printed.
  internal_notes: z.string().max(8000).nullish(),
  items: z.array(InvoiceItemSchema).optional(),
  // Rich-text CZ/EN "Obsah" sections rendered after the items on the PDF
  // (mirrors issued orders — shared DocumentSectionSchema, DB-aligned limits).
  sections: z.array(DocumentSectionSchema).optional(),
  // Positional indices of company custom fields to print on this document's PDF.
  selected_custom_fields: z
    .array(z.number().int().nonnegative())
    .max(200)
    .optional(),
});

export const UpdateInvoiceSchema = z.object({
  status: z.string().max(20).optional(),
  currency: z.string().max(10).optional(),
  language: z.string().max(5).optional(),
  payment_method: z.string().max(50).nullish(),
  constant_symbol: z.string().max(20).nullish(),
  bank_name: z.string().max(255).nullish(),
  bank_swift: z.string().max(20).nullish(),
  bank_iban: z.string().max(50).nullish(),
  bank_account: z.string().max(50).nullish(),
  issued_by: z.string().max(255).nullish(),
  billing_text: z.string().max(500).nullish(),
  customer_id: nullableIntIdFromForm.optional(),
  vat_rate: numberInRange(0, 100).optional(),
  apply_vat: booleanFromForm.optional(),
  issue_date: nullableIsoDateString,
  due_date: nullableIsoDateString,
  tax_date: nullableIsoDateString,
  internal_notes: z.string().max(8000).nullish(),
  paid_date: nullableIsoDateString,
  items: z.array(InvoiceItemSchema).optional(),
  sections: z.array(DocumentSectionSchema).optional(),
  selected_custom_fields: z
    .array(z.number().int().nonnegative())
    .max(200)
    .optional(),
});

export type CreateInvoiceInput = z.infer<typeof CreateInvoiceSchema>;
export type UpdateInvoiceInput = z.infer<typeof UpdateInvoiceSchema>;