"use client"

import { useEffect, useState } from "react"
import { Loader2, Sparkles } from "lucide-react"
import { toast } from "sonner"
import {
  Dialog,
  DialogContent,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog"
import { Button } from "@/components/ui/button"
import { useImproveContact } from "@/lib/api/hooks/use-improve-contact"
import { useUpdateContact } from "@/lib/api/hooks/use-contact-mutations"
import { fullContactToApiContact } from "@/lib/api/adapters"
import type { ApiEnrichedContactData } from "@/lib/contacts/discovery-types"
import {
  fullContactToImprovePayload,
  improvedDataToDraftFields,
  mergeImprovedContact,
} from "@/lib/contacts/improve-contact"
import { contactApiPath } from "@/lib/contacts/contact-api-path"
import type { FullContact } from "@/lib/contacts/types"
import { DiscoveryFieldChips } from "@/components/gmail/contacts-page/discovery-field-chips"
import {
  CONTACTS_MUTED_TEXT,
  CONTACTS_PRIMARY_BTN_CLASS,
} from "@/lib/contacts-chrome-classes"
import { cn } from "@/lib/utils"

interface ContactImproveDialogProps {
  contact: FullContact
  open: boolean
  onOpenChange: (open: boolean) => void
}

export function ContactImproveDialog({ contact, open, onOpenChange }: ContactImproveDialogProps) {
  const improveMutation = useImproveContact()
  const updateMutation = useUpdateContact()
  const [improved, setImproved] = useState<ApiEnrichedContactData | null>(null)

  useEffect(() => {
    if (!open) {
      setImproved(null)
      improveMutation.reset()
      return
    }
    const payload = fullContactToImprovePayload(contact)
    improveMutation.mutate(payload, {
      onSuccess: (data) => setImproved(data),
      onError: (err) => {
        const msg = err instanceof Error ? err.message : "Échec de l'amélioration IA"
        toast.error(msg)
      },
    })
    // eslint-disable-next-line react-hooks/exhaustive-deps -- relancer à l'ouverture pour ce contact
  }, [open, contact.id])

  const loading = improveMutation.isPending
  const chipItems = improved ? improvedDataToDraftFields(improved) : []

  function handleApply() {
    if (!improved) return
    const merged = mergeImprovedContact(contact, improved)
    const path = contactApiPath(contact)
    if (!contact.etag) {
      toast.error("Impossible d'enregistrer : version du contact inconnue. Rechargez la liste.")
      return
    }
    updateMutation.mutate(
      { path, etag: contact.etag, contact: fullContactToApiContact(merged) },
      {
        onSuccess: () => {
          toast.success("Contact mis à jour")
          onOpenChange(false)
        },
        onError: (err) => {
          const msg =
            err instanceof Error && err.message ? err.message : "Impossible d'enregistrer les modifications"
          toast.error(msg)
        },
      },
    )
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-lg">
        <DialogHeader>
          <DialogTitle className="flex items-center gap-2">
            <Sparkles className="h-4 w-4 text-amber-500" />
            Amélioration IA
          </DialogTitle>
        </DialogHeader>

        {loading && (
          <div className={cn("flex items-center justify-center gap-2 py-8 text-sm", CONTACTS_MUTED_TEXT)}>
            <Loader2 className="h-4 w-4 animate-spin" />
            Analyse et nettoyage en cours…
          </div>
        )}

        {!loading && improveMutation.isError && (
          <p className={cn("py-4 text-sm", CONTACTS_MUTED_TEXT)}>
            L&apos;amélioration a échoué. Vérifiez la configuration LLM dans les réglages.
          </p>
        )}

        {!loading && improved && (
          <div className="space-y-3">
            <p className={cn("text-sm", CONTACTS_MUTED_TEXT)}>
              Aperçu des informations nettoyées et réorganisées. Aucune donnée n&apos;est
              enregistrée tant que vous n&apos;appliquez pas les changements.
            </p>
            <DiscoveryFieldChips items={chipItems} editable={false} />
          </div>
        )}

        <DialogFooter className="gap-3 sm:gap-3">
          <Button type="button" variant="link" onClick={() => onOpenChange(false)}>
            Annuler
          </Button>
          <Button
            type="button"
            disabled={!improved || loading || updateMutation.isPending}
            onClick={handleApply}
            className={CONTACTS_PRIMARY_BTN_CLASS}
          >
            {updateMutation.isPending ? (
              <Loader2 className="mr-1.5 h-4 w-4 animate-spin" />
            ) : null}
            Appliquer
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  )
}