'use client'

import { zodResolver } from '@hookform/resolvers/zod'
import { useEffect, useState } from 'react'
import { FormProvider, useForm } from 'react-hook-form'

import { addToast } from '@/lib/toast'
import type { AdminUserDetail } from '@/services/adminUserDetail'
import Modal from '@/components/modals/Modal'
import Input from '@/components/formElements/Input'
import { AdminFormSection } from '@/components/forms/AdminFormLayout'
import UnsavedChangesIndicator from '@/components/forms/UnsavedChangesIndicator'
import { ADMIN_UPDATE_USER, type AdminUpdateUserPayload } from '@/services/adminUsers'
import { API_ROUTES } from '@/services/config'
import { AdminUserEditValidation, type AdminUserEditValues } from '@/validation/adminUsers'
import useAlertModal from '@/hooks/useAlertModal'
import axiosInstance from '@/config/axios'

const STATUS_OPTIONS = [
  { id: 'active', name: 'فعال' },
  { id: 'suspended', name: 'معلق' },
]

const HOST_PLAN_OPTIONS = [
  { id: 'free', name: 'رایگان (حداکثر ۱۰ ایونت)' },
  { id: 'unlimited', name: 'نامحدود' },
]

const GENDER_OPTIONS = [
  { id: 'male', name: 'مرد' },
  { id: 'female', name: 'زن' },
  { id: 'other', name: 'سایر' },
]

interface CityOption {
  id: number
  name: string
}

const toFormValues = (user: AdminUserDetail): AdminUserEditValues => ({
  firstName: user.firstName ?? '',
  lastName: user.lastName ?? '',
  gender: user.gender ?? '',
  cityId: user.cityId ? String(user.cityId) : '',
  avatarUrl: user.avatarUrl ?? '',
  bio: user.bio ?? '',
  status: user.status === 'suspended' ? 'suspended' : 'active',
  hostPlan: user.hostPlan ?? 'free',
})

interface UserEditModalProps {
  isOpen: boolean
  onOpenChange: (isOpen: boolean) => void
  user: AdminUserDetail
  /** Current admin's own id — status can't be self-edited. */
  currentAdminId?: string
  onSuccess: () => void
}

const UserEditModal = ({ isOpen, onOpenChange, user, currentAdminId, onSuccess }: UserEditModalProps) => {
  const { showAlert } = useAlertModal()
  const [submitting, setSubmitting] = useState(false)
  const [cities, setCities] = useState<CityOption[]>([])

  const isSelfEdit = Boolean(currentAdminId) && currentAdminId === user.id

  const form = useForm<AdminUserEditValues>({
    resolver: zodResolver(AdminUserEditValidation),
    defaultValues: toFormValues(user),
  })
  const { reset } = form

  // Modal stays mounted across opens, so reset explicitly whenever it opens
  // (and the target user's data may have refreshed since the last edit).
  useEffect(() => {
    if (isOpen) {
      reset(toFormValues(user))
    }
  }, [isOpen, reset, user])

  useEffect(() => {
    if (!isOpen || cities.length > 0) return

    axiosInstance
      .get(API_ROUTES.GEOGRAPHY.ALL_CITIES)
      .then((res) => {
        const payload: unknown = res.data
        let list: unknown = []

        if (Array.isArray(payload)) {
          list = payload
        } else if (typeof payload === 'object' && payload !== null) {
          const record = payload as { data?: unknown; body?: unknown }

          list = record.data ?? record.body ?? []
        }

        setCities(Array.isArray(list) ? (list as { id: number; name: string }[]) : [])
      })
      .catch(() => {
        setCities([])
      })
  }, [isOpen, cities.length])

  const buildDiffPayload = (values: AdminUserEditValues): AdminUpdateUserPayload => {
    const initial = toFormValues(user)
    const payload: AdminUpdateUserPayload = {}

    if (values.firstName && values.firstName !== initial.firstName) payload.firstName = values.firstName
    if (values.lastName && values.lastName !== initial.lastName) payload.lastName = values.lastName
    if (values.gender && values.gender !== initial.gender) payload.gender = values.gender
    if (values.cityId && values.cityId !== initial.cityId) payload.cityId = Number(values.cityId)
    if (values.avatarUrl && values.avatarUrl !== initial.avatarUrl) payload.avatarUrl = values.avatarUrl
    if (values.bio && values.bio !== initial.bio) payload.bio = values.bio
    if (!isSelfEdit && values.status !== initial.status) payload.status = values.status
    if (values.hostPlan !== initial.hostPlan) payload.hostPlan = values.hostPlan

    return payload
  }

  const submitUpdate = async (values: AdminUserEditValues) => {
    const payload = buildDiffPayload(values)

    if (Object.keys(payload).length === 0) {
      onOpenChange(false)

      return
    }

    setSubmitting(true)
    const result = await ADMIN_UPDATE_USER(user.id, payload)

    setSubmitting(false)

    if (!result.ok) return

    addToast({ title: 'اطلاعات کاربر ذخیره شد', color: 'success' })
    onOpenChange(false)
    onSuccess()
  }

  const handleSubmit = (values: AdminUserEditValues) => {
    const initial = toFormValues(user)
    const payload = buildDiffPayload(values)

    if (Object.keys(payload).length === 0) {
      onOpenChange(false)

      return
    }

    if (!isSelfEdit && values.status === 'suspended' && initial.status !== 'suspended') {
      showAlert('این کاربر معلق شود؟ کاربر تا فعال‌سازی مجدد امکان استفاده از حساب را نخواهد داشت.', () => submitUpdate(values), undefined, {
        dangerAccept: true,
      })

      return
    }

    showAlert('تغییرات این کاربر ذخیره شود؟', () => submitUpdate(values))
  }

  return (
    <Modal
      acceptBtnText="ذخیره تغییرات"
      isLoading={submitting}
      isOpen={isOpen}
      title={`ویرایش «${[user.firstName, user.lastName].filter(Boolean).join(' ') || user.mobile}»`}
      onAccept={form.handleSubmit(handleSubmit)}
      onOpenChange={onOpenChange}
    >
      <FormProvider {...form}>
        <form
          className="flex flex-col gap-4"
          onSubmit={form.handleSubmit(handleSubmit)}
        >
          <UnsavedChangesIndicator isDirty={form.formState.isDirty} />
          <AdminFormSection
            contained={false}
            description="اطلاعات عمومی نمایش‌داده‌شده در پروفایل کاربر"
            title="اطلاعات پروفایل"
          >
            <div className="flex flex-col gap-4">
              <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
                <Input
                  generalType="input"
                  label="نام"
                  name="firstName"
                  placeholder="نام"
                  variant="flat"
                />
                <Input
                  generalType="input"
                  label="نام خانوادگی"
                  name="lastName"
                  placeholder="نام خانوادگی"
                  variant="flat"
                />
              </div>
              <Input
                generalType="select"
                label="پلن میزبانی"
                name="hostPlan"
                selectKey="id"
                selectOptions={HOST_PLAN_OPTIONS}
                selectValue="name"
              />
              <Input
                generalType="select"
                label="جنسیت"
                name="gender"
                selectKey="id"
                selectOptions={GENDER_OPTIONS}
                selectValue="name"
              />
              <Input
                generalType="select"
                label="شهر"
                name="cityId"
                selectKey="id"
                selectOptions={cities}
                selectValue="name"
              />
              <Input
                direction="ltr"
                generalType="input"
                label="آدرس تصویر پروفایل"
                name="avatarUrl"
                placeholder="https://..."
                variant="flat"
              />
              <Input
                generalType="textarea"
                label="بیوگرافی"
                name="bio"
                placeholder="بیوگرافی کوتاه کاربر"
                variant="flat"
              />
            </div>
          </AdminFormSection>

          <AdminFormSection
            contained={false}
            description="سطح دسترسی و امکان استفاده از حساب"
            title="تنظیمات مدیریتی"
          >
            <div className="flex flex-col gap-4">
              {isSelfEdit && (
                <div className="rounded-xl border border-fourth-100 bg-fourth-100 px-3 py-2 text-xs leading-5 text-fourth-900">
                  وضعیت حساب خودتان از این‌جا قابل ویرایش نیست.
                </div>
              )}
              <Input
                disabled={isSelfEdit}
                generalType="select"
                label="وضعیت حساب"
                name="status"
                selectKey="id"
                selectOptions={STATUS_OPTIONS}
                selectValue="name"
              />
            </div>
          </AdminFormSection>
        </form>
      </FormProvider>
    </Modal>
  )
}

export default UserEditModal