"use client"

import { useCallback, useState } from "react"
import { Check, Copy } from "lucide-react"
import { toast } from "sonner"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Switch } from "@/components/ui/switch"
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"
import { AutomationTabMasonry } from "@/components/gmail/settings/automation/automation-tab-masonry"
import {
  SettingsCard,
  SettingsField,
  SettingsGrid,
} from "@/components/settings/settings-kit"
import { OrgSettingsSection } from "@/components/admin/settings/org-settings-form"
import { MigrationProjectsPanel } from "@/components/admin/settings/sections/migration-projects-panel"
import { useOrgSettingsStore } from "@/lib/admin-settings/org-settings-store"
import {
  useCreateMailDomain,
  useMailDomains,
  useVerifyMailDomainMX,
  useVerifyMailDomainTXT,
} from "@/lib/api/hooks/use-hosted-mail"

export function MailDomainsSection() {
  const domainsQuery = useMailDomains()
  const createDomain = useCreateMailDomain()
  const [domainName, setDomainName] = useState("")
  const mailing = useOrgSettingsStore((s) => s.mailing)
  const setMailing = useOrgSettingsStore((s) => s.setMailing)

  const domains = domainsQuery.data?.domains ?? []

  return (
    <div className="space-y-8">
      <OrgSettingsSection
        title="Mail"
        description="Domaines hébergés Stalwart, relais SMTP des notifications suite et migration."
        policySection="mailing"
      >
      <AutomationTabMasonry columns={2}>
        <SettingsCard
          title="Domaines hébergés"
          description="Vérification DNS, DKIM et provisioning des boîtes @domaine."
        >
          <div className="grid gap-4 md:grid-cols-[1fr_auto] md:items-end">
            <SettingsField label="Nouveau domaine" htmlFor="new-domain">
              <Input
                id="new-domain"
                className="h-9"
                value={domainName}
                onChange={(e) => setDomainName(e.target.value)}
                placeholder="entreprise.com"
              />
            </SettingsField>
            <Button
              disabled={!domainName || createDomain.isPending}
              onClick={() => {
                void createDomain.mutateAsync({ name: domainName }).then(() => setDomainName(""))
              }}
            >
              Ajouter
            </Button>
          </div>

          <ul className="space-y-3">
            {domains.map((domain) => (
              <DomainRow key={domain.id} domain={domain} />
            ))}
          </ul>
        </SettingsCard>

        <SettingsCard
          title="Notifications suite (SMTP)"
          description="Partages de fichiers, mentions, invitations — distinct des comptes mail utilisateur."
          action={
            <Switch
              checked={mailing.enabled}
              onCheckedChange={(enabled) => setMailing({ enabled })}
            />
          }
        >
          <SettingsGrid columns={2}>
            <SettingsField label="Hôte SMTP">
              <Input
                className="h-9"
                value={mailing.smtp_host}
                onChange={(e) => setMailing({ smtp_host: e.target.value })}
                placeholder="smtp.example.com"
              />
            </SettingsField>
            <SettingsField label="Port">
              <Input
                className="h-9"
                type="number"
                value={mailing.smtp_port}
                onChange={(e) => setMailing({ smtp_port: Number(e.target.value) || 587 })}
              />
            </SettingsField>
            <SettingsField label="Utilisateur">
              <Input
                className="h-9"
                value={mailing.smtp_user}
                onChange={(e) => setMailing({ smtp_user: e.target.value })}
              />
            </SettingsField>
            <SettingsField label="Mot de passe">
              <Input
                className="h-9"
                type="password"
                value={mailing.smtp_password}
                onChange={(e) => setMailing({ smtp_password: e.target.value })}
              />
            </SettingsField>
            <SettingsField label="Chiffrement">
              <Select
                value={mailing.tls_mode}
                onValueChange={(tls_mode) =>
                  setMailing({ tls_mode: tls_mode as typeof mailing.tls_mode })
                }
              >
                <SelectTrigger className="h-9 w-full min-w-0">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="starttls">STARTTLS</SelectItem>
                  <SelectItem value="ssl">SSL/TLS</SelectItem>
                  <SelectItem value="none">Aucun</SelectItem>
                </SelectContent>
              </Select>
            </SettingsField>
            <SettingsField label="Adresse d'expédition">
              <Input
                className="h-9"
                type="email"
                value={mailing.from_email}
                onChange={(e) => setMailing({ from_email: e.target.value })}
              />
            </SettingsField>
            <SettingsField label="Nom affiché">
              <Input
                className="h-9"
                value={mailing.from_name}
                onChange={(e) => setMailing({ from_name: e.target.value })}
              />
            </SettingsField>
            <SettingsField label="Reply-To (optionnel)" className="sm:col-span-2">
              <Input
                className="h-9"
                type="email"
                value={mailing.reply_to ?? ""}
                onChange={(e) => setMailing({ reply_to: e.target.value })}
              />
            </SettingsField>
          </SettingsGrid>
        </SettingsCard>
      </AutomationTabMasonry>
      </OrgSettingsSection>

      <MigrationProjectsPanel domains={domains} />
    </div>
  )
}

function CopyTxtButton({
  label,
  copied,
  onCopy,
}: {
  label: string
  copied: boolean
  onCopy: () => void
}) {
  return (
    <Button
      type="button"
      size="icon"
      variant="ghost"
      className="h-6 w-6 shrink-0"
      aria-label={label}
      title={label}
      onClick={onCopy}
    >
      {copied ? <Check className="h-3.5 w-3.5" /> : <Copy className="h-3.5 w-3.5 opacity-60" />}
    </Button>
  )
}

function DomainRow({
  domain,
}: {
  domain: {
    id: string
    name: string
    status: string
    verification_token?: string
    is_platform_domain: boolean
  }
}) {
  const verifyTxt = useVerifyMailDomainTXT(domain.id)
  const verifyMx = useVerifyMailDomainMX(domain.id)
  const [copiedField, setCopiedField] = useState<"name" | "value" | null>(null)
  const txtName = `_ultisuite-verify.${domain.name}`

  const copyTxtField = useCallback(async (text: string, field: "name" | "value", successLabel: string) => {
    try {
      await navigator.clipboard.writeText(text)
      setCopiedField(field)
      toast.success(successLabel)
      window.setTimeout(() => setCopiedField(null), 2000)
    } catch {
      toast.error("Impossible de copier")
    }
  }, [])

  return (
    <li className="rounded-lg border border-mail-border bg-mail-surface-muted/40 p-4">
      <div className="flex flex-wrap items-center justify-between gap-2">
        <div>
          <p className="font-medium">
            {domain.name}
            {domain.is_platform_domain ? " (plateforme)" : ""}
          </p>
          <p className="text-sm text-muted-foreground">Statut : {domain.status}</p>
          {domain.verification_token && (
            <div className="mt-2 space-y-1 text-xs text-muted-foreground">
              <p>Enregistrement TXT :</p>
              <div className="flex flex-wrap items-center gap-1">
                <code className="rounded bg-muted px-1.5 py-0.5 font-mono">{txtName}</code>
                <CopyTxtButton
                  label="Copier le nom TXT"
                  copied={copiedField === "name"}
                  onCopy={() => void copyTxtField(txtName, "name", "Nom TXT copié")}
                />
                <span className="px-0.5">=</span>
                <code className="rounded bg-muted px-1.5 py-0.5 font-mono">{domain.verification_token}</code>
                <CopyTxtButton
                  label="Copier la valeur TXT"
                  copied={copiedField === "value"}
                  onCopy={() =>
                    void copyTxtField(domain.verification_token!, "value", "Valeur TXT copiée")
                  }
                />
              </div>
            </div>
          )}
        </div>
        <div className="flex gap-2">
          <Button size="sm" variant="outline" onClick={() => void verifyTxt.mutateAsync()}>
            Vérifier TXT
          </Button>
          <Button size="sm" variant="secondary" onClick={() => void verifyMx.mutateAsync()}>
            Vérifier MX
          </Button>
        </div>
      </div>
    </li>
  )
}