import { z } from "zod"

import { dt } from "@scandic-hotels/common/dt"
import { phoneValidator } from "@scandic-hotels/common/utils/zod/phoneValidator"

import { specialRequestSchema } from "@/components/HotelReservation/EnterDetails/Details/SpecialRequests/schema"

// stringMatcher regex is copied from current web as specified by requirements.
const stringMatcher =
  /^[A-Za-z¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ0-9-\s]*$/

const isValidString = (key: string) => stringMatcher.test(key)

export const roomOneErrors = {
  COUNTRY_REQUIRED: "COUNTRY_REQUIRED",
  FIRST_NAME_REQUIRED: "FIRST_NAME_REQUIRED",
  FIRST_NAME_SPECIAL_CHARACTERS: "FIRST_NAME_SPECIAL_CHARACTERS",
  LAST_NAME_REQUIRED: "LAST_NAME_REQUIRED",
  LAST_NAME_SPECIAL_CHARACTERS: "LAST_NAME_SPECIAL_CHARACTERS",
  PHONE_REQUIRED: "PHONE_REQUIRED",
  PHONE_REQUESTED: "PHONE_REQUESTED",
  EMAIL_REQUIRED: "EMAIL_REQUIRED",
  MEMBERSHIP_NO_ONLY_DIGITS: "MEMBERSHIP_NO_ONLY_DIGITS",
  MEMBERSHIP_NO_INVALID: "MEMBERSHIP_NO_INVALID",
  ZIP_CODE_REQUIRED: "ZIP_CODE_REQUIRED",
  ZIP_CODE_INVALID: "ZIP_CODE_INVALID",
  BIRTH_DATE_REQUIRED: "BIRTH_DATE_REQUIRED",
  BIRTH_DATE_AGE_18: "BIRTH_DATE_AGE_18",
} as const

export const baseDetailsSchema = z.object({
  countryCode: z.string().min(1, roomOneErrors.COUNTRY_REQUIRED),
  email: z.string().email(roomOneErrors.EMAIL_REQUIRED),
  firstName: z
    .string()
    .min(1, roomOneErrors.FIRST_NAME_REQUIRED)
    .refine(isValidString, roomOneErrors.FIRST_NAME_SPECIAL_CHARACTERS),
  lastName: z
    .string()
    .min(1, roomOneErrors.LAST_NAME_REQUIRED)
    .refine(isValidString, roomOneErrors.LAST_NAME_SPECIAL_CHARACTERS),
  phoneNumber: phoneValidator(
    roomOneErrors.PHONE_REQUIRED,
    roomOneErrors.PHONE_REQUESTED
  ),
  phoneNumberCC: z.string(),
  specialRequest: specialRequestSchema,
})

export const notJoinDetailsSchema = baseDetailsSchema.merge(
  z.object({
    join: z.literal<boolean>(false),
    zipCode: z.string().optional(),
    dateOfBirth: z.string().optional(),
    membershipNo: z
      .string()
      .optional()
      .refine((val) => {
        if (val) {
          return !val.match(/[^0-9]/g)
        }
        return true
      }, roomOneErrors.MEMBERSHIP_NO_ONLY_DIGITS)
      .refine((num) => {
        if (num) {
          return num.match(/^30812(?!(0|1|2))[0-9]{9}$/)
        }
        return true
      }, roomOneErrors.MEMBERSHIP_NO_INVALID),
  })
)

export const joinDetailsSchema = baseDetailsSchema.merge(
  z.object({
    join: z.literal<boolean>(true),
    zipCode: z
      .string()
      .min(1, roomOneErrors.ZIP_CODE_REQUIRED)
      .regex(/^[A-Za-z0-9-\s]{1,9}$/g, roomOneErrors.ZIP_CODE_INVALID),
    dateOfBirth: z
      .string()
      .min(1, roomOneErrors.BIRTH_DATE_REQUIRED)
      .refine((date) => {
        const today = dt()
        const dob = dt(date)
        const age = today.diff(dob, "year")
        return age >= 18
      }, roomOneErrors.BIRTH_DATE_AGE_18),
    membershipNo: z.string().default(""),
  })
)

export const guestDetailsSchema = z.discriminatedUnion("join", [
  notJoinDetailsSchema,
  joinDetailsSchema,
])

// For signed in users we accept partial or invalid data. Users cannot
// change their info in this flow, so we don't want to validate it.
export const signedInDetailsSchema = z.object({
  countryCode: z.string().default(""),
  email: z.string().default(""),
  firstName: z.string().default(""),
  lastName: z.string().default(""),
  membershipNo: z.string().default(""),
  phoneNumber: z.string().default(""),
  phoneNumberCC: z.string().default(""),
  join: z
    .boolean()
    .optional()
    .transform((_) => false),
  dateOfBirth: z.string().default(""),
  zipCode: z.string().default(""),
  specialRequest: specialRequestSchema,
})