import { z } from "zod/v4";
import { LIMITS } from "@/lib/limits";
import {
  isTripDepartureDayPast,
  tripStoredInstantFromYmd,
} from "@/lib/trip-dates";

export const tripImageUrlsSchema = z
  .array(
    z
      .string()
      .trim()
      .max(LIMITS.MAX_URL_LENGTH, "URL terlalu panjang")
      .url("Setiap URL gambar harus valid (http/https)")
  )
  .max(LIMITS.MAX_IMAGE_URLS, `Maksimal ${LIMITS.MAX_IMAGE_URLS} foto`);

export const createTripSchema = z
  .object({
    title: z
      .string()
      .trim()
      .min(3, "Judul minimal 3 karakter")
      .max(
        LIMITS.MAX_TITLE_LENGTH,
        `Judul maksimal ${LIMITS.MAX_TITLE_LENGTH} karakter`
      ),
    description: z.preprocess(
      (val) => {
        if (val == null) return undefined;
        const s = String(val).trim();
        return s === "" ? undefined : s;
      },
      z
        .string()
        .max(
          LIMITS.MAX_DESCRIPTION_LENGTH,
          `Deskripsi maksimal ${LIMITS.MAX_DESCRIPTION_LENGTH} karakter`
        )
        .optional()
    ),
    mountain: z
      .string()
      .trim()
      .min(2, "Nama gunung harus diisi")
      .max(
        LIMITS.MAX_MOUNTAIN_LENGTH,
        `Nama gunung maksimal ${LIMITS.MAX_MOUNTAIN_LENGTH} karakter`
      ),
    location: z
      .string()
      .trim()
      .min(2, "Lokasi harus diisi")
      .max(
        LIMITS.MAX_LOCATION_LENGTH,
        `Lokasi maksimal ${LIMITS.MAX_LOCATION_LENGTH} karakter`
      ),
    date: z
      .string()
      .refine((val) => !Number.isNaN(Date.parse(val)), "Tanggal berangkat tidak valid"),
    endDate: z
      .string()
      .optional()
      .refine(
        (val) => !val || !Number.isNaN(Date.parse(val)),
        "Tanggal pulang tidak valid"
      ),
    maxParticipants: z.coerce
      .number()
      .int("Jumlah peserta harus bilangan bulat")
      .min(
        LIMITS.MIN_PARTICIPANTS,
        `Minimal ${LIMITS.MIN_PARTICIPANTS} peserta`
      )
      .max(
        LIMITS.MAX_PARTICIPANTS,
        `Maksimal ${LIMITS.MAX_PARTICIPANTS} peserta`
      ),
    price: z.coerce
      .number()
      .int("Harga harus bilangan bulat (tanpa desimal)")
      .min(0, "Harga tidak valid")
      .max(
        LIMITS.MAX_PRICE_IDR,
        `Harga maksimal Rp ${LIMITS.MAX_PRICE_IDR.toLocaleString("id-ID")}`
      ),
  })
  .superRefine((data, ctx) => {
    const dep = tripStoredInstantFromYmd(data.date);
    if (!Number.isNaN(dep.getTime()) && isTripDepartureDayPast(dep)) {
      ctx.addIssue({
        code: "custom",
        message: "Tanggal berangkat tidak boleh di masa lalu",
        path: ["date"],
      });
    }
    if (data.endDate) {
      const startY = data.date.slice(0, 10);
      const endY = data.endDate.slice(0, 10);
      if (endY < startY) {
        ctx.addIssue({
          code: "custom",
          message: "Tanggal pulang tidak boleh sebelum tanggal berangkat",
          path: ["endDate"],
        });
      }
    }
  });

export type CreateTripInput = z.infer<typeof createTripSchema>;