"use client"

import { useState, useRef, useEffect, useCallback } from "react"
import {
  Menu,
  Search,
  X,
  Pencil,
  Archive,
  FolderInput,
  Reply,
} from "lucide-react"
import { Button } from "@/components/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import { useComposeActions } from "@/lib/compose-context"
import { MoveToDropdownItems } from "@/components/gmail/move-to-menu-items"
import { MAIL_MENU_SURFACE_CLASS } from "@/lib/mail-chrome-classes"
import type { MailXsViewChrome } from "@/lib/mail-xs-view-chrome"
import { cn } from "@/lib/utils"

interface MobileBottomBarProps {
  sidebarOpen: boolean
  onToggleSidebar: () => void
  /** Lecture message xs : barre d’actions à la place du menu / recherche. */
  xsViewChrome?: MailXsViewChrome | null
}

const ROUNDED_BAR_BTN =
  "size-11 shrink-0 rounded-full border border-gray-200 bg-white/80 text-[#444746] shadow-md backdrop-blur hover:bg-white"

export function MobileBottomBar({
  sidebarOpen,
  onToggleSidebar,
  xsViewChrome = null,
}: MobileBottomBarProps) {
  const [searchValue, setSearchValue] = useState("")
  const inputRef = useRef<HTMLInputElement>(null)
  const { openCompose } = useComposeActions()
  const inMailView = Boolean(xsViewChrome)

  const hasSearch = searchValue.length > 0

  const handleClear = useCallback(() => {
    setSearchValue("")
    inputRef.current?.focus()
  }, [])

  useEffect(() => {
    if (sidebarOpen) {
      inputRef.current?.blur()
    }
  }, [sidebarOpen])

  return (
    <div className="fixed inset-x-0 bottom-0 z-50 flex flex-col items-center pb-[env(safe-area-inset-bottom)] sm:hidden">
      <div className={cn(
        "pointer-events-none absolute inset-0 bg-gradient-to-t to-transparent",
        inMailView
          ? "from-black/90 via-black/50"
          : "from-mail-surface/95 via-mail-surface/70 dark:from-background/95 dark:via-background/70"
      )} />

      <div className="relative z-10 flex w-full items-center gap-2 px-3 pb-3 pt-2">
        {inMailView && xsViewChrome ? (
          <div className="flex shrink-0 overflow-hidden rounded-full border border-gray-200 bg-white/80 shadow-md backdrop-blur">
            <Button
              type="button"
              variant="ghost"
              size="icon"
              className="size-11 rounded-none text-[#444746] hover:bg-[#f1f3f4]"
              onClick={xsViewChrome.onArchive}
              aria-label="Archiver"
            >
              <Archive className="size-5" strokeWidth={1.5} />
            </Button>
            <span className="w-px shrink-0 self-stretch bg-gray-200" aria-hidden />
            <DropdownMenu>
              <DropdownMenuTrigger asChild>
                <Button
                  type="button"
                  variant="ghost"
                  size="icon"
                  className="size-11 rounded-none text-[#444746] hover:bg-[#f1f3f4]"
                  aria-label="Déplacer dans un dossier"
                >
                  <FolderInput className="size-5" strokeWidth={1.5} />
                </Button>
              </DropdownMenuTrigger>
              <DropdownMenuContent
                align="start"
                side="top"
                sideOffset={8}
                className={cn(MAIL_MENU_SURFACE_CLASS, "max-h-80 overflow-y-auto")}
              >
                <MoveToDropdownItems
                  targets={xsViewChrome.moveTargets}
                  onMoveTo={xsViewChrome.onMoveTo}
                />
              </DropdownMenuContent>
            </DropdownMenu>
            <span className="w-px shrink-0 self-stretch bg-gray-200" aria-hidden />
            <Button
              type="button"
              variant="ghost"
              size="icon"
              className="size-11 rounded-none text-[#444746] hover:bg-[#f1f3f4]"
              onClick={xsViewChrome.onReply}
              aria-label="Répondre"
            >
              <Reply className="size-5" strokeWidth={1.5} />
            </Button>
          </div>
        ) : (
          <>
            <Button
              variant="ghost"
              size="icon"
              className={ROUNDED_BAR_BTN}
              onClick={onToggleSidebar}
              aria-label={sidebarOpen ? "Fermer le menu" : "Ouvrir le menu"}
            >
              {sidebarOpen ? (
                <X className="size-5" />
              ) : (
                <Menu className="size-5" />
              )}
            </Button>

            {!sidebarOpen && (
              <div className="relative flex min-w-0 flex-1 items-center">
                <div className="pointer-events-none absolute left-3 z-10 flex items-center text-gray-500">
                  <Search className="size-5" />
                </div>
                <input
                  ref={inputRef}
                  type="text"
                  value={searchValue}
                  onChange={(e) => setSearchValue(e.target.value)}
                  placeholder="Rechercher"
                  className="h-11 w-full rounded-full border border-gray-200 bg-white/80 pl-10 pr-4 text-sm shadow-md backdrop-blur outline-none placeholder:text-gray-400 focus:ring-2 focus:ring-blue-500/40"
                />
              </div>
            )}
          </>
        )}

        {!sidebarOpen && (
          <Button
            variant="ghost"
            size="icon"
            className={cn(ROUNDED_BAR_BTN, inMailView && "ml-auto")}
            onClick={inMailView || !hasSearch ? openCompose : handleClear}
            aria-label={!inMailView && hasSearch ? "Effacer la recherche" : "Nouveau message"}
          >
            {!inMailView && hasSearch ? (
              <X className="size-5" />
            ) : (
              <Pencil className="size-5" />
            )}
          </Button>
        )}
      </div>
    </div>
  )
}