"use client"

import { useMemo, useState } from "react"
import { format } from "date-fns"
import { InvitationTimeChipText } from "@/components/gmail/invitation-time-chip-text"
import { AgendaMark } from "@/components/suite/agenda-mark"
import { Icon } from "@iconify/react"
import { ThumbsDown, ThumbsUp, Users, MoreVertical } from "lucide-react"
import {
  VIDEO_CONFERENCE_LOGOS,
  formatInvitationAttendeeLine,
  type ParsedCalendarInvitation,
} from "@/lib/calendar-invitation"
import { ensureVcLogosCollection } from "@/lib/register-vc-logos"
import { cn } from "@/lib/utils"
import { MAIL_INVITATION_CARD_CLASS } from "@/lib/mail-chrome-classes"

function attendeeDisplayList(inv: ParsedCalendarInvitation): {
  organizerLine?: string
  othersLine?: string
} {
  const orgEmail = inv.organizer?.email
  const organizerLine =
    orgEmail || inv.organizer?.name
      ? `${orgEmail ?? inv.organizer?.name} – Organisateur`
      : undefined

  const others = inv.attendees.filter((a) => {
    const e = a.email?.toLowerCase()
    return e && e !== orgEmail?.toLowerCase()
  })
  const line = formatInvitationAttendeeLine(
    others.length > 0 ? others : inv.attendees,
    4
  )
  return {
    organizerLine,
    othersLine: line || undefined,
  }
}

const RSVP_BTN =
  "rounded-full bg-[#1a73e8] px-4 py-2 text-sm font-medium text-white shadow-sm transition-colors hover:bg-[#1557b0]"

const RSVP_SECONDARY =
  "rounded-full border border-border bg-mail-surface px-4 py-2 text-sm font-medium text-primary transition-colors hover:bg-accent"

export function CalendarInvitationPreview({
  invitation,
  className,
  calendarAppName = "Agenda",
}: {
  invitation: ParsedCalendarInvitation
  className?: string
  /** Nom de l'app calendrier affiché dans le bouton « Ouvrir dans … ». */
  calendarAppName?: string
}) {
  ensureVcLogosCollection()

  const { organizerLine, othersLine } = useMemo(
    () => attendeeDisplayList(invitation),
    [invitation]
  )

  const confIcon = VIDEO_CONFERENCE_LOGOS[invitation.conferenceProvider]

  const [rsvp, setRsvp] = useState<string | null>(null)

  return (
    <div
      className={cn(
        MAIL_INVITATION_CARD_CLASS,
        className
      )}
    >
      <div className="flex flex-col gap-3 md:flex-row md:items-start md:justify-between md:gap-4">
        <div className="min-w-0 flex-1 space-y-2">
          <div className="flex flex-wrap items-center gap-2 text-sm text-muted-foreground">
            <Icon icon={confIcon} className="size-5 shrink-0" aria-hidden />
            <InvitationTimeChipText
              start={invitation.start}
              end={invitation.end}
            />
          </div>
          <h2 className="text-xl font-normal leading-snug text-foreground">
            {invitation.summary}
          </h2>
          {organizerLine && (
            <p className="text-sm text-foreground/90">{organizerLine}</p>
          )}
          {othersLine && (
            <p className="flex flex-wrap items-start gap-1.5 text-sm text-foreground/90">
              <Users className="mt-0.5 size-4 shrink-0 text-muted-foreground" aria-hidden />
              <span>{othersLine}</span>
            </p>
          )}
        </div>

        <div className="flex shrink-0 flex-row items-start gap-3 md:flex-col md:items-end">
          <div className="flex size-12 shrink-0 items-center justify-center rounded-lg border border-border bg-mail-surface shadow-sm">
            <AgendaMark className="size-9 object-contain" />
          </div>
          <div className="min-w-0 text-right text-sm leading-snug text-muted-foreground">
            <p className="font-medium text-foreground">Dans votre agenda</p>
            <p className="mt-0.5">Aucun autre événement à cette date</p>
          </div>
        </div>
      </div>

      <div className="mt-4 flex flex-wrap items-center gap-2">
        {(["Oui", "Non", "Peut-être"] as const).map((label) => (
          <button
            key={label}
            type="button"
            className={cn(RSVP_BTN, rsvp === label && "ring-2 ring-[#202124]/30")}
            onClick={() => setRsvp(label)}
          >
            {label}
          </button>
        ))}
        <button type="button" className={RSVP_SECONDARY}>
          Proposer un autre horaire
        </button>
        <a
          href={`/agenda/day/${format(invitation.start, "yyyy-MM-dd")}`}
          className={RSVP_SECONDARY}
        >
          Ouvrir dans {calendarAppName}
        </a>
        <button
          type="button"
          className="ml-auto flex size-10 items-center justify-center rounded-full border border-border bg-mail-surface text-muted-foreground hover:bg-accent md:ml-0"
          aria-label="Plus d’options"
        >
          <MoreVertical className="size-[18px]" strokeWidth={1.5} />
        </button>
      </div>

      <div className="mt-4 flex flex-wrap items-center justify-between gap-2 border-t border-border/60 pt-3 text-xs text-muted-foreground">
        <span>D’après cet e-mail</span>
        <div className="flex items-center gap-2">
          <span>Correct ?</span>
          <button
            type="button"
            className="rounded p-1 text-[#5f6368] hover:bg-black/5"
            aria-label="Oui, correct"
          >
            <ThumbsUp className="size-4" strokeWidth={1.5} />
          </button>
          <button
            type="button"
            className="rounded p-1 text-[#5f6368] hover:bg-black/5"
            aria-label="Non, incorrect"
          >
            <ThumbsDown className="size-4" strokeWidth={1.5} />
          </button>
        </div>
      </div>
    </div>
  )
}