import { z } from "zod";
export const PAGE_SIZES = ["A3", "A4", "A5", "Letter"] as const;
export const ORIENTATIONS = ["portrait", "landscape"] as const;
export const DEFAULT_MARGIN = 10; // mm
export const DEFAULT_VIEWPORT_WIDTH = "1096px";
export const MIN_VIEWPORT_WIDTH = 96;
export const MAX_VIEWPORT_WIDTH = 65000;
// Matches values like "1in", "10mm", "0.5cm", "1,5cm", "100px", "12pt"
const MARGIN_REGEX = /^\d+([.,]\d+)?(in|mm|cm|px|pt)$/;
// Accepts string with unit OR literal 0, transforms 0 to "0mm"
const marginSchema = z.union([
z.string().regex(MARGIN_REGEX, "Must be a number with unit: in, mm, cm, px, or pt (e.g., 1in, 10mm, 0.5cm)"),
z.literal(0).transform(() => "0mm")
]);
export const CreatePdfSchema = z.object({
html: z.string()
.optional()
.describe("HTML content to convert"),
url: z.string()
.url()
.optional()
.describe("URL to convert"),
file: z.string()
.optional()
.describe("Path to local HTML file"),
output_path: z.string()
.min(1)
.describe("File path where the PDF will be saved"),
page_size: z.enum(PAGE_SIZES)
.default("A4")
.describe("Page size"),
orientation: z.enum(ORIENTATIONS)
.default("portrait")
.describe("Page orientation"),
margins: marginSchema
.default(`${DEFAULT_MARGIN}mm`)
.describe("Page margins (e.g., 10mm, 1in, 0.5cm, or 0 for no margins)."),
viewport_width: z.number()
.int()
.min(MIN_VIEWPORT_WIDTH)
.max(MAX_VIEWPORT_WIDTH)
.optional()
.describe(`HTML rendering viewport width in pixels (${MIN_VIEWPORT_WIDTH}-${MAX_VIEWPORT_WIDTH}). Default: ${DEFAULT_VIEWPORT_WIDTH.replace("px", "")}.`),
title: z.string()
.optional()
.describe("PDF title metadata")
}).strict().refine(
data => [data.html, data.url, data.file].filter(Boolean).length === 1,
{ message: "Provide exactly one of: html, url, or file" }
);
export type CreatePdfInput = z.infer<typeof CreatePdfSchema>;
