"use client"

import { useEffect, useRef, useState } from "react"
import Link from "next/link"
import { Icon } from "@iconify/react"
import { LayoutGrid, Pencil } from "lucide-react"
import { Button } from "@/components/ui/button"
import {
  SUITE_FAVORITE_APPS,
  type FavoriteApp,
} from "@/lib/suite/favorite-apps"
import { MAIL_SETTINGS_BASE_PATH } from "@/lib/mail-settings/settings-nav"
import { SUITE_HEADER_DROPDOWN_CLASS, SUITE_ICON_BTN } from "@/lib/suite/suite-chrome-classes"
import { cn } from "@/lib/utils"

const FAVORITE_TILE_CLASS =
  "flex flex-col items-center gap-2 rounded-lg p-3 transition-colors hover:bg-accent"

const DEFAULT_ICON_BTN_CLASS = cn(
  "rounded-full",
  SUITE_ICON_BTN,
  "hover:text-accent-foreground",
)

function FavoriteAppTile({
  app,
  onNavigate,
}: {
  app: FavoriteApp
  onNavigate?: () => void
}) {
  const content = (
    <>
      <div className="flex h-10 w-10 items-center justify-center">
        {app.iconDark ? (
          <>
            <img
              src={app.icon}
              alt=""
              className="h-10 w-10 object-contain dark:hidden"
              onError={(e) => {
                const target = e.target as HTMLImageElement
                target.style.display = "none"
              }}
            />
            <img
              src={app.iconDark}
              alt=""
              className="hidden h-10 w-10 object-contain dark:block"
              onError={(e) => {
                const target = e.target as HTMLImageElement
                target.style.display = "none"
              }}
            />
          </>
        ) : (
          <img
            src={app.icon}
            alt=""
            className={cn(
              "h-10 w-10 object-contain",
              app.whiteLogoInDark && "dark:invert dark:hue-rotate-180",
            )}
            onError={(e) => {
              const target = e.target as HTMLImageElement
              target.style.display = "none"
              target.parentElement!.innerHTML = `<div class="flex h-10 w-10 items-center justify-center rounded-full bg-blue-500 font-bold text-white">${app.name[0]}</div>`
            }}
          />
        )}
      </div>
      <span className="w-full text-center text-xs text-muted-foreground">
        {app.name}
      </span>
    </>
  )

  if (!app.href) {
    return (
      <button type="button" className={FAVORITE_TILE_CLASS} disabled>
        {content}
      </button>
    )
  }

  if (app.external) {
    return (
      <a
        href={app.href}
        target="_blank"
        rel="noopener noreferrer"
        className={FAVORITE_TILE_CLASS}
        onClick={onNavigate}
      >
        {content}
      </a>
    )
  }

  return (
    <Link href={app.href} className={FAVORITE_TILE_CLASS} onClick={onNavigate}>
      {content}
    </Link>
  )
}

interface SuiteFavoritesMenuProps {
  className?: string
  iconButtonClass?: string
  dropdownClass?: string
  /** Fermer un autre panneau header (ex. compte) à l’ouverture. */
  onOpen?: () => void
}

export function SuiteFavoritesMenu({
  className,
  iconButtonClass = DEFAULT_ICON_BTN_CLASS,
  dropdownClass = SUITE_HEADER_DROPDOWN_CLASS,
  onOpen,
}: SuiteFavoritesMenuProps) {
  const [open, setOpen] = useState(false)
  const menuRef = useRef<HTMLDivElement>(null)

  useEffect(() => {
    function handleClickOutside(event: MouseEvent) {
      if (menuRef.current && !menuRef.current.contains(event.target as Node)) {
        setOpen(false)
      }
    }
    document.addEventListener("mousedown", handleClickOutside)
    return () => document.removeEventListener("mousedown", handleClickOutside)
  }, [])

  return (
    <div className={cn("relative hidden sm:block", className)} ref={menuRef}>
      <Button
        variant="ghost"
        size="icon"
        className={iconButtonClass}
        aria-label="Applications"
        aria-expanded={open}
        aria-haspopup="dialog"
        onClick={() => {
          const next = !open
          setOpen(next)
          if (next) onOpen?.()
        }}
      >
        <LayoutGrid className="size-6 shrink-0" aria-hidden />
      </Button>

      {open ? (
        <div
          className={cn(
            "absolute right-0 top-12 z-50 w-96 rounded-2xl",
            dropdownClass,
          )}
          role="dialog"
          aria-label="Vos favoris"
        >
          <div className="flex items-center justify-between border-b border-border p-4">
            <span className="text-lg font-normal text-foreground">
              Vos favoris
            </span>
            <div className="flex items-center gap-1">
              <Button
                variant="ghost"
                size="icon"
                className={cn("h-8 w-8", iconButtonClass)}
                aria-label="Réglages"
                asChild
              >
                <Link
                  href={MAIL_SETTINGS_BASE_PATH}
                  onClick={() => setOpen(false)}
                >
                  <Icon icon="mdi:cog-outline" className="size-5 shrink-0" aria-hidden />
                </Link>
              </Button>
              <Button
                variant="ghost"
                size="icon"
                className={cn("h-8 w-8", iconButtonClass)}
                aria-label="Personnaliser les favoris"
                disabled
              >
                <Pencil className="h-4 w-4" />
              </Button>
            </div>
          </div>
          <div className="grid grid-cols-3 gap-1 p-3">
            {SUITE_FAVORITE_APPS.map((app) => (
              <FavoriteAppTile
                key={app.name}
                app={app}
                onNavigate={() => setOpen(false)}
              />
            ))}
          </div>
        </div>
      ) : null}
    </div>
  )
}