"use client"

import { useState } from "react"
import { Pencil, Trash2 } from "lucide-react"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog"
import {
  useMailWebhooks,
  useCreateMailWebhook,
  useUpdateMailWebhook,
  useDeleteMailWebhook,
} from "@/lib/api/hooks/use-mail-automation-queries"
import { useAuthReady } from "@/lib/api/use-auth-ready"
import { SettingsSyncBanner } from "@/components/gmail/settings/settings-sync-banner"
import { WebhookTemplateVariablesPanel } from "@/components/gmail/settings/automation/webhook-template-variables-panel"
import { AutomationTabMasonry } from "@/components/gmail/settings/automation/automation-tab-masonry"
import { WebhookEventScopeEditor } from "@/components/gmail/settings/automation/webhook-event-scope-editor"
import {
  AutomationDomainFilterTab,
  AutomationDomainMark,
  AutomationDomainMarks,
} from "@/components/gmail/settings/automation/automation-domain-mark"
import { WEBHOOK_DEFAULT_TEMPLATES } from "@/lib/mail-automation/webhook-template-variables"
import {
  AUTOMATION_DOMAIN_LABELS,
  type AutomationDomain,
} from "@/lib/mail-automation/domains"
import {
  createDefaultWebhookForm,
  defaultEventTypesForDomain,
  eventDomainsFromTypes,
  type WebhookFormState,
} from "@/lib/mail-automation/webhook-config"
import { TRIGGER_LABELS } from "@/lib/mail-automation/domains"
import type { ApiWebhook } from "@/lib/api/types"
import type { TriggerType } from "@/lib/mail-automation/types"

const CREATE_DOMAINS: AutomationDomain[] = ["mail", "drive", "contacts"]

function webhookToForm(hook: ApiWebhook): WebhookFormState {
  return {
    name: hook.name,
    url: hook.url,
    template: hook.body_template ?? WEBHOOK_DEFAULT_TEMPLATES.mail,
    eventTypes: (hook.event_types?.length ? hook.event_types : ["message_received"]) as TriggerType[],
    mailScope: hook.mail_scope ?? { all_accounts: true, account_ids: [] },
    driveScope: hook.drive_scope ?? { all_folders: true, folder_paths: [] },
    contactsScope: hook.contacts_scope ?? { all_books: true, book_ids: [] },
  }
}

function summarizeWebhook(hook: ApiWebhook): string {
  const types = hook.event_types ?? []
  if (types.length === 0) return "Aucun événement"
  const labels = types.slice(0, 3).map((t) => TRIGGER_LABELS[t as TriggerType] ?? t)
  const extra = types.length > 3 ? ` +${types.length - 3}` : ""
  return labels.join(", ") + extra
}

function webhookDomains(hook: ApiWebhook): AutomationDomain[] {
  const types = (hook.event_types ?? []) as TriggerType[]
  return eventDomainsFromTypes(types.length > 0 ? types : ["message_received"])
}

export function WebhooksPanel() {
  const { ready, authenticated } = useAuthReady()
  const { data: webhooks = [], isFetching, isError, refetch, isPending } = useMailWebhooks()
  const createWebhook = useCreateMailWebhook()
  const updateWebhook = useUpdateMailWebhook()
  const deleteWebhook = useDeleteMailWebhook()

  const [editorOpen, setEditorOpen] = useState(false)
  const [editingId, setEditingId] = useState<string | null>(null)
  const [presetDomain, setPresetDomain] = useState<AutomationDomain>("mail")
  const [form, setForm] = useState<WebhookFormState>(() => createDefaultWebhookForm("mail"))

  const showInitialLoad = ready && authenticated && isPending && webhooks.length === 0

  const editorTitle = editingId ? "Modifier le webhook" : "Nouveau webhook"

  function openCreate(domain: AutomationDomain) {
    setEditingId(null)
    setPresetDomain(domain)
    setForm({
      ...createDefaultWebhookForm(domain),
      template: WEBHOOK_DEFAULT_TEMPLATES[domain],
    })
    setEditorOpen(true)
  }

  function openEdit(hook: ApiWebhook) {
    setEditingId(hook.id)
    setForm(webhookToForm(hook))
    const domains = webhookDomains(hook)
    setPresetDomain(domains[0] ?? "mail")
    setEditorOpen(true)
  }

  async function handleSave() {
    const payload = {
      name: form.name.trim(),
      url: form.url.trim(),
      method: "POST" as const,
      body_template: form.template,
      event_types: form.eventTypes,
      mail_scope: form.mailScope,
      drive_scope: form.driveScope,
      contacts_scope: form.contactsScope,
    }
    if (editingId) {
      await updateWebhook.mutateAsync({ webhookId: editingId, ...payload })
    } else {
      await createWebhook.mutateAsync(payload)
    }
    setEditorOpen(false)
  }

  const canSave =
    form.name.trim().length > 0 &&
    form.url.trim().length > 0 &&
    form.eventTypes.length > 0 &&
    !createWebhook.isPending &&
    !updateWebhook.isPending

  return (
    <div className="space-y-4">
      <SettingsSyncBanner isFetching={isFetching} isError={isError} onRetry={() => refetch()} />

      <AutomationTabMasonry columns={2}>
        <div className="space-y-4">
          <div className="space-y-2">
            <p className="text-sm font-medium">Webhooks</p>
            <div className="flex flex-col gap-1.5">
              {CREATE_DOMAINS.map((domain) => (
                <Button
                  key={domain}
                  type="button"
                  variant="outline"
                  size="sm"
                  className="h-9 w-full justify-start gap-2 px-3"
                  onClick={() => openCreate(domain)}
                >
                  <AutomationDomainMark domain={domain} className="size-5" alt="" />
                  <span>Nouveau webhook {AUTOMATION_DOMAIN_LABELS[domain]}</span>
                </Button>
              ))}
            </div>
          </div>

          {showInitialLoad ? (
            <p className="text-sm text-muted-foreground">Chargement…</p>
          ) : webhooks.length === 0 ? (
            <p className="text-sm text-muted-foreground">Aucun webhook configuré.</p>
          ) : (
            <ul className="divide-y divide-border rounded-lg border border-border">
              {webhooks.map((hook) => {
                const domains = webhookDomains(hook)
                return (
                  <li key={hook.id} className="flex items-start gap-2 px-3 py-3">
                    <AutomationDomainMarks
                      domains={domains}
                      className="pt-0.5"
                      markClassName="size-5"
                    />
                    <div className="min-w-0 flex-1">
                      <p className="text-sm font-medium">{hook.name}</p>
                      <p className="truncate text-xs text-muted-foreground">{hook.url}</p>
                      <p className="mt-0.5 text-[11px] text-muted-foreground">
                        {summarizeWebhook(hook)}
                      </p>
                    </div>
                    <div className="flex shrink-0 gap-1">
                      <Button type="button" variant="ghost" size="icon" onClick={() => openEdit(hook)}>
                        <Pencil className="size-4" />
                      </Button>
                      <Button
                        type="button"
                        variant="ghost"
                        size="icon"
                        onClick={() => deleteWebhook.mutate(hook.id)}
                      >
                        <Trash2 className="size-4" />
                      </Button>
                    </div>
                  </li>
                )
              })}
            </ul>
          )}
        </div>

        <WebhookTemplateVariablesPanel />
      </AutomationTabMasonry>

      <Dialog open={editorOpen} onOpenChange={setEditorOpen}>
        <DialogContent className="flex max-h-[90vh] max-w-lg flex-col gap-0 overflow-hidden p-0 sm:max-w-2xl">
          <DialogHeader className="border-b border-border px-4 py-3">
            <DialogTitle className="text-base">{editorTitle}</DialogTitle>
          </DialogHeader>
          <div className="flex-1 space-y-4 overflow-y-auto p-4">
            {!editingId ? (
              <div className="space-y-1.5">
                <Label className="text-xs text-muted-foreground">Modèle de départ</Label>
                <div className="flex flex-wrap gap-2">
                  {CREATE_DOMAINS.map((domain) => (
                    <AutomationDomainFilterTab
                      key={domain}
                      domain={domain}
                      label={AUTOMATION_DOMAIN_LABELS[domain]}
                      active={presetDomain === domain}
                      onClick={() => {
                        setPresetDomain(domain)
                        setForm((f) => ({
                          ...f,
                          eventTypes: defaultEventTypesForDomain(domain),
                          template: WEBHOOK_DEFAULT_TEMPLATES[domain],
                        }))
                      }}
                    />
                  ))}
                </div>
              </div>
            ) : null}

            <div className="space-y-2">
              <Label className="text-xs">Nom</Label>
              <Input value={form.name} onChange={(e) => setForm({ ...form, name: e.target.value })} />
            </div>
            <div className="space-y-2">
              <Label className="text-xs">URL HTTPS</Label>
              <Input value={form.url} onChange={(e) => setForm({ ...form, url: e.target.value })} />
            </div>
            <div className="space-y-2">
              <Label className="text-xs">body_template JSON</Label>
              <textarea
                className="min-h-20 w-full rounded-md border border-input bg-background px-3 py-2 font-mono text-xs"
                value={form.template}
                onChange={(e) => setForm({ ...form, template: e.target.value })}
              />
            </div>

            <WebhookEventScopeEditor
              eventTypes={form.eventTypes}
              onEventTypesChange={(eventTypes) => setForm({ ...form, eventTypes })}
              mailScope={form.mailScope}
              onMailScopeChange={(mailScope) => setForm({ ...form, mailScope })}
              driveScope={form.driveScope}
              onDriveScopeChange={(driveScope) => setForm({ ...form, driveScope })}
              contactsScope={form.contactsScope}
              onContactsScopeChange={(contactsScope) => setForm({ ...form, contactsScope })}
            />
          </div>
          <div className="flex justify-end gap-2 border-t border-border px-4 py-3">
            <Button type="button" variant="outline" onClick={() => setEditorOpen(false)}>
              Annuler
            </Button>
            <Button type="button" disabled={!canSave} onClick={handleSave}>
              Enregistrer
            </Button>
          </div>
        </DialogContent>
      </Dialog>
    </div>
  )
}