import { z } from 'zod'

import { EVENT_SLUG_MAX_LENGTH } from '@/features/events/eventSlug'
import { isPublicEventSlug } from '@/lib/routing/eventRoute'
import { texts } from '@/texts'

// هم‌تراز با اسلاگ دسته‌بندی‌ها — فقط لاتین، بدون تبدیل ارقام فارسی
const SLUG_PATTERN = /^[a-z0-9]+(?:-[a-z0-9]+)*$/
const v = texts.validation.eventWizard

/** ترکیب تاریخ ISO و دقیقهٔ روز برای مقایسهٔ شروع/پایان (بدون وابستگی به components) */
function toDateTime(dateIso: string, minutes: number): Date | null {
  const date = new Date(dateIso)

  if (!Number.isFinite(date.getTime()) || !Number.isFinite(minutes)) return null

  date.setHours(Math.floor(minutes / 60), minutes % 60, 0, 0)

  return date
}

export const EventWizardStep1Validation = z.object({
  title: z.string().trim().min(1, v.titleRequired).max(200, v.titleMax),
  slug: z
    .string()
    .trim()
    .min(1, v.slugRequired)
    .max(EVENT_SLUG_MAX_LENGTH, v.slugMax)
    .regex(SLUG_PATTERN, v.slugPattern)
    .refine(isPublicEventSlug, v.slugReserved),
  categoryId: z.string().min(1, v.categoryRequired),
  shortDescription: z.string().trim().max(500, v.shortDescriptionMax).optional().or(z.literal('')),
  description: z.string().optional().or(z.literal('')),
})

export type EventWizardStep1Values = z.infer<typeof EventWizardStep1Validation>

const eventWizardStep2ScheduleRefine = (
  values: {
    startDate: string
    startTime: number
    endDate: string
    endTime: number
    addressVisibility: 'public' | 'attendees_only'
    generalArea?: string
  },
  ctx: z.RefinementCtx
) => {
  const startsAt = toDateTime(values.startDate, values.startTime)
  const endsAt = toDateTime(values.endDate, values.endTime)

  if (!startsAt || !endsAt) {
    ctx.addIssue({
      code: 'custom',
      message: v.startEndRequired,
      path: ['startDate'],
    })

    return
  }

  if (endsAt <= startsAt) {
    ctx.addIssue({
      code: 'custom',
      message: v.endAfterStart,
      path: ['endDate'],
    })
  }

  if (values.addressVisibility === 'attendees_only' && !values.generalArea?.trim()) {
    ctx.addIssue({
      code: 'custom',
      message: v.generalAreaRequired,
      path: ['generalArea'],
    })
  }
}

const eventWizardStep2Fields = z.object({
  startDate: z.string().min(1, v.startDateRequired),
  startTime: z.number({ error: v.startTimeRequired }),
  endDate: z.string().min(1, v.endDateRequired),
  endTime: z.number({ error: v.endTimeRequired }),
  provinceId: z.string().optional().or(z.literal('')),
  cityId: z.string().min(1, texts.validation.cityRequired),
  address: z.string().trim().min(1, v.addressRequired),
  addressVisibility: z.enum(['public', 'attendees_only']),
  generalArea: z.string().trim().optional().or(z.literal('')),
})

export const EventWizardStep2Validation = eventWizardStep2Fields.superRefine(eventWizardStep2ScheduleRefine)

export type EventWizardStep2Values = z.infer<typeof EventWizardStep2Validation>

export {
  ConsumerEventWizardStep2Validation,
  parseConsumerEventWizardStep2,
  type ConsumerEventWizardStep2FieldErrors,
  type ConsumerEventWizardStep2Values,
} from '@/validation/consumerEventWizardStep2'

export const EventWizardStep3Validation = z
  .object({
    isFree: z.boolean(),
    price: z.number({ error: v.priceRequired }).min(0, v.priceNonNegative),
    capacity: z.number({ error: v.capacityRequired }).int(v.capacityInteger).min(1, v.capacityMin),
    reservedCapacity: z.number({ error: v.reservedCapacityRequired }).int(v.reservedCapacityInteger).min(0, v.reservedCapacityNonNegative),
    genderRestriction: z.enum(['open', 'female_only', 'male_only']),
    ageRestriction: z.enum(['open', 'age_15_19', 'age_20_24', 'age_25_plus']),
    cancellationFeePercent: z.number({ error: v.cancelPenaltyRequired }).min(0, v.cancelPenaltyNonNegative).max(100, v.cancelPenaltyMax),
    cancellationFeePercent12To24Hours: z
      .number({ error: v.cancelPenaltyRequired })
      .min(0, v.cancelPenaltyNonNegative)
      .max(100, v.cancelPenaltyMax),
    cancellationFeePercentMoreThan24Hours: z
      .number({ error: v.cancelPenaltyRequired })
      .min(0, v.cancelPenaltyNonNegative)
      .max(100, v.cancelPenaltyMax),
    isDiscoverable: z.boolean(),
    autoCreateGroup: z.boolean(),
    waitlistAutoOffer: z.boolean(),
    sendReviewRequestSms: z.boolean(),
  })
  .superRefine((values, ctx) => {
    if (!values.isFree && values.price <= 0) {
      ctx.addIssue({
        code: 'custom',
        message: v.paidPricePositive,
        path: ['price'],
      })
    }
    if (values.reservedCapacity > values.capacity) {
      ctx.addIssue({
        code: 'custom',
        message: v.reservedExceedsCapacity,
        path: ['reservedCapacity'],
      })
    }
    if (
      values.cancellationFeePercent < values.cancellationFeePercent12To24Hours ||
      values.cancellationFeePercent12To24Hours < values.cancellationFeePercentMoreThan24Hours
    ) {
      ctx.addIssue({
        code: 'custom',
        message: v.cancelPenaltyOrder,
        path: ['cancellationFeePercent12To24Hours'],
      })
    }
  })

export type EventWizardStep3Values = z.infer<typeof EventWizardStep3Validation>

export const EventWizardFaqFormValidation = z.object({
  question: z.string().trim().min(1, v.faqQuestionRequired),
  answer: z.string().trim().min(1, v.faqAnswerRequired),
})

export type EventWizardFaqFormValues = z.infer<typeof EventWizardFaqFormValidation>