import { useEffect, useState } from 'react'
import { toast } from 'sonner'

import {
  Dialog,
  DialogContent,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@evobgp/ui/components/dialog'
import { Input } from '@evobgp/ui/components/input'
import { Label } from '@evobgp/ui/components/label'

import { LoadingButton } from '@/components/loading-button'
import { CommunitySelect } from '@/components/modules/community-select'
import { ApiError, apiMutate } from '@/lib/api-client'
import type { BgpCommunity, IpRangeEntry, IpRangeEntryCreate } from '@/types/api'

interface ModuleIpRangeEntryDialogProps {
  open: boolean
  moduleId: string
  edit: IpRangeEntry | null
  communities: BgpCommunity[]
  onOpenChange: (open: boolean) => void
  onSaved: () => void | Promise<void>
}

export function ModuleIpRangeEntryDialog({
  open,
  moduleId,
  edit,
  communities,
  onOpenChange,
  onSaved,
}: ModuleIpRangeEntryDialogProps) {
  const [saving, setSaving] = useState(false)
  const [form, setForm] = useState<IpRangeEntryCreate>({ prefix: '', community_id: '' })

  useEffect(() => {
    if (!open) return
    setForm(
      edit
        ? { prefix: edit.prefix, community_id: edit.community_id }
        : { prefix: '', community_id: '' },
    )
  }, [open, edit])

  async function save() {
    if (!form.prefix.trim() || !form.community_id) {
      toast.error('Укажите префикс и community')
      return
    }
    setSaving(true)
    try {
      const body = { prefix: form.prefix.trim(), community_id: form.community_id }
      if (edit) {
        await apiMutate(`/v1/modules/${moduleId}/ip-range-entries/${edit.id}`, 'PATCH', body)
        toast.success('Диапазон обновлён')
      } else {
        await apiMutate(`/v1/modules/${moduleId}/ip-range-entries`, 'POST', body)
        toast.success('Диапазон добавлен')
      }
      onOpenChange(false)
      await onSaved()
    } catch (e) {
      toast.error(e instanceof ApiError ? e.message : String(e))
    } finally {
      setSaving(false)
    }
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-sm">
        <DialogHeader>
          <DialogTitle>{edit ? 'Редактировать диапазон' : 'Новый IP-диапазон'}</DialogTitle>
        </DialogHeader>
        <div className="space-y-4 py-2">
          <div className="flex flex-col gap-1.5">
            <Label htmlFor="ip-prefix">Префикс (CIDR)</Label>
            <Input
              id="ip-prefix"
              placeholder="203.0.113.0/24"
              value={form.prefix}
              onChange={(e) => setForm((s) => ({ ...s, prefix: e.target.value }))}
            />
          </div>
          <CommunitySelect
            id="ip-comm"
            label="Community (обязательно)"
            value={form.community_id || null}
            onValueChange={(v) => setForm((s) => ({ ...s, community_id: v ?? '' }))}
            communities={communities}
            placeholder="Выберите community"
          />
        </div>
        <DialogFooter>
          <LoadingButton variant="outline" onClick={() => onOpenChange(false)}>
            Отмена
          </LoadingButton>
          <LoadingButton loading={saving} onClick={() => void save()}>
            {edit ? 'Сохранить' : 'Добавить'}
          </LoadingButton>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  )
}