import { z } from 'zod'
import { moneyText } from '@/lib/money-schema'
import { daysInclusive, isIsoDate, MAX_PERIOD_DAYS } from '@/lib/period-dates'
import { t } from '@/lib/strings'

const s = t.wizard

/** 1. adım: dönem tarihleri. `last` = son gün (dahil). */
export const datesSchema = z
  .object({
    start: z.string(),
    last: z.string(),
    name: z.string().trim().max(60, s.dates.nameTooLong),
  })
  .superRefine((v, ctx) => {
    if (!isIsoDate(v.start)) {
      ctx.addIssue({ code: 'custom', path: ['start'], message: s.dates.startRequired })
    }
    if (!isIsoDate(v.last)) {
      ctx.addIssue({ code: 'custom', path: ['last'], message: s.dates.lastRequired })
      return
    }
    if (!isIsoDate(v.start)) return
    if (v.last < v.start) {
      ctx.addIssue({ code: 'custom', path: ['last'], message: s.dates.lastBeforeStart })
    } else if (daysInclusive(v.start, v.last) > MAX_PERIOD_DAYS) {
      ctx.addIssue({ code: 'custom', path: ['last'], message: s.dates.tooLong(MAX_PERIOD_DAYS) })
    }
  })
export type DatesForm = z.infer<typeof datesSchema>

/** 2–3. adım: gelir / gider kalemi. Tarih boş olabilir; doluysa dönem içinde olmalı. */
export function itemSchema(start: string, last: string) {
  return z.object({
    name: z.string().trim().min(1, s.items.nameRequired).max(60, s.items.nameTooLong),
    amount: moneyText('positive'),
    date: z
      .string()
      .refine((d) => d === '' || (isIsoDate(d) && d >= start && d <= last), s.items.dateOutside),
  })
}
export type ItemForm = z.infer<ReturnType<typeof itemSchema>>

/** 4. adım */
export const savingsSchema = z.object({ goal: moneyText('optional') })
export type SavingsForm = z.infer<typeof savingsSchema>

/** 5. adım: 4 grubun aylık bütçesi */
export const budgetSchema = z.object({
  needs: moneyText('optional'),
  wants: moneyText('optional'),
  culture: moneyText('optional'),
  unexpected: moneyText('optional'),
})
export type BudgetForm = z.infer<typeof budgetSchema>