"use client"

import { useState, useCallback } from "react"
import { type Editor } from "@tiptap/react"
import {
  ChevronDown,
  Paperclip,
  Link as LinkIcon,
  HardDrive,
  Image as ImageIcon,
  Lock,
  PenTool,
  MoreVertical,
  Trash2,
  Type,
  Clock,
  Send,
} from "lucide-react"
import {
  type ComposeState,
  SIGNATURES,
  useComposeActions,
} from "@/lib/compose-context"
import { cn, getNextLocalWallClockDate } from "@/lib/utils"
import {
  MAIL_COMPOSE_BOTTOM_ICON_BTN,
  MAIL_COMPOSE_BOTTOM_ICON_BTN_ACTIVE,
  MAIL_COMPOSE_MENU_SELECTED_CLASS,
  MAIL_COMPOSE_POPOVER_CLASS,
  MAIL_COMPOSE_PRIMARY_SEND_BTN,
  MAIL_MENU_SURFACE_CLASS,
} from "@/lib/mail-chrome-classes"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuSub,
  DropdownMenuSubContent,
  DropdownMenuSubTrigger,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "@/components/ui/popover"
import { COMPOSE_PORTAL_Z, insertSignatureHtml } from "./compose-shared"
import { ComposeEmojiButton } from "./compose-emoji-picker"

function ComposeLinkButton({
  editor,
}: {
  editor: Editor | null
}) {
  const [open, setOpen] = useState(false)
  const [url, setUrl] = useState("")
  const [text, setText] = useState("")

  if (!editor) return null

  const isLinkActive = editor.isActive("link")

  const handleToggle = () => {
    if (isLinkActive) {
      editor.chain().focus().extendMarkRange("link").unsetLink().run()
      return
    }
    setOpen(true)
  }

  const handleOpen = (isOpen: boolean) => {
    if (isOpen) {
      const { from, to, empty } = editor.state.selection
      if (isLinkActive) {
        const attrs = editor.getAttributes("link")
        setUrl(attrs.href || "")
        const selectedText = editor.state.doc.textBetween(from, to, " ")
        setText(selectedText)
      } else if (!empty) {
        const selectedText = editor.state.doc.textBetween(from, to, " ")
        setText(selectedText)
        setUrl("")
      } else {
        setText("")
        setUrl("")
      }
    }
    setOpen(isOpen)
  }

  const handleInsert = () => {
    if (!url.trim()) return
    const href = url.match(/^https?:\/\//) ? url : `https://${url}`

    const { empty } = editor.state.selection

    if (empty && !isLinkActive) {
      const displayText = text.trim() || href
      editor
        .chain()
        .focus()
        .insertContent(`<a href="${href}">${displayText}</a>`)
        .run()
    } else {
      if (text.trim() && text.trim() !== editor.state.doc.textBetween(
        editor.state.selection.from,
        editor.state.selection.to,
        " "
      )) {
        editor
          .chain()
          .focus()
          .deleteSelection()
          .insertContent(`<a href="${href}">${text.trim()}</a>`)
          .run()
      } else {
        editor
          .chain()
          .focus()
          .extendMarkRange("link")
          .setLink({ href })
          .run()
      }
    }

    setOpen(false)
    setUrl("")
    setText("")
  }

  const handleRemoveLink = () => {
    editor.chain().focus().extendMarkRange("link").unsetLink().run()
    setOpen(false)
    setUrl("")
    setText("")
  }

  return (
    <Popover open={open} onOpenChange={handleOpen}>
      <PopoverTrigger asChild>
        <button
          type="button"
          onClick={(e) => {
            if (isLinkActive) {
              e.preventDefault()
              handleToggle()
            }
          }}
          className={cn(
            MAIL_COMPOSE_BOTTOM_ICON_BTN,
            isLinkActive && MAIL_COMPOSE_BOTTOM_ICON_BTN_ACTIVE
          )}
          title={isLinkActive ? "Supprimer le lien" : "Insérer un lien"}
        >
          <LinkIcon className="h-[18px] w-[18px]" />
        </button>
      </PopoverTrigger>
      <PopoverContent
        align="start"
        side="top"
        className={cn("w-[340px]", MAIL_COMPOSE_POPOVER_CLASS, COMPOSE_PORTAL_Z)}
        onOpenAutoFocus={(e) => e.preventDefault()}
      >
        <div className="flex flex-col gap-2.5">
          <div className="text-sm font-medium text-foreground">
            {isLinkActive ? "Modifier le lien" : "Insérer un lien"}
          </div>
          <div className="flex flex-col gap-1.5">
            <label className="text-xs text-muted-foreground">Texte à afficher</label>
            <input
              type="text"
              value={text}
              onChange={(e) => setText(e.target.value)}
              placeholder="Texte du lien"
              className="h-8 rounded border border-border bg-mail-surface px-2 text-sm text-foreground outline-none focus:border-ring focus:ring-1 focus:ring-ring"
            />
          </div>
          <div className="flex flex-col gap-1.5">
            <label className="text-xs text-muted-foreground">URL</label>
            <input
              type="text"
              value={url}
              onChange={(e) => setUrl(e.target.value)}
              placeholder="https://example.com"
              onKeyDown={(e) => {
                if (e.key === "Enter") {
                  e.preventDefault()
                  handleInsert()
                }
              }}
              className="h-8 rounded border border-border bg-mail-surface px-2 text-sm text-foreground outline-none focus:border-ring focus:ring-1 focus:ring-ring"
              autoFocus
            />
          </div>
          <div className="flex items-center justify-between pt-1">
            {isLinkActive ? (
              <button
                type="button"
                onClick={handleRemoveLink}
                className="text-sm text-destructive hover:text-destructive/90 transition-colors"
              >
                Supprimer le lien
              </button>
            ) : (
              <span />
            )}
            <div className="flex gap-2">
              <button
                type="button"
                onClick={() => setOpen(false)}
                className="rounded px-3 py-1.5 text-sm text-muted-foreground hover:bg-accent transition-colors"
              >
                Annuler
              </button>
              <button
                type="button"
                onClick={handleInsert}
                disabled={!url.trim()}
                className={cn("rounded px-3 py-1.5 text-sm font-medium disabled:opacity-50", MAIL_COMPOSE_PRIMARY_SEND_BTN)}
              >
                {isLinkActive ? "Modifier" : "Insérer"}
              </button>
            </div>
          </div>
        </div>
      </PopoverContent>
    </Popover>
  )
}

export function ComposeSignatureButton({
  editor,
  compose,
}: {
  editor: Editor | null
  compose: ComposeState
}) {
  const { updateCompose } = useComposeActions()

  const replaceSignature = useCallback(
    (sigId: string | null) => {
      if (!editor) return
      const newHtml = insertSignatureHtml(editor.getHTML(), sigId)
      editor.commands.setContent(newHtml)
      updateCompose(compose.id, { bodyHtml: newHtml, signatureId: sigId })
    },
    [editor, compose.id, updateCompose]
  )

  const toggleAutoInsert = useCallback(() => {
    const newVal = !compose.autoInsertSignature
    updateCompose(compose.id, { autoInsertSignature: newVal })
    if (!newVal) {
      replaceSignature(null)
    } else {
      const sigId = compose.from.defaultSignatureId
      if (sigId) replaceSignature(sigId)
    }
  }, [compose.autoInsertSignature, compose.from.defaultSignatureId, compose.id, updateCompose, replaceSignature])

  if (!editor) return null

  return (
    <DropdownMenu modal={false}>
      <DropdownMenuTrigger asChild>
        <button
          type="button"
          className={MAIL_COMPOSE_BOTTOM_ICON_BTN}
          title="Insérer une signature"
        >
          <PenTool className="h-[18px] w-[18px]" />
        </button>
      </DropdownMenuTrigger>
      <DropdownMenuContent
        align="start"
        side="top"
        className={cn(MAIL_MENU_SURFACE_CLASS, "min-w-[220px]", COMPOSE_PORTAL_Z)}
      >
        <DropdownMenuItem
          onSelect={(e) => {
            e.preventDefault()
            toggleAutoInsert()
          }}
          className="gap-2"
        >
          <span className="flex h-4 w-4 items-center justify-center">
            {compose.autoInsertSignature && <span className="text-xs">✓</span>}
          </span>
          Insérer automatiquement
        </DropdownMenuItem>
        <DropdownMenuSeparator />
        <DropdownMenuItem
          onSelect={() => replaceSignature(null)}
          className={cn("gap-2", !compose.signatureId && MAIL_COMPOSE_MENU_SELECTED_CLASS)}
        >
          <span className="flex h-4 w-4 items-center justify-center">
            {!compose.signatureId && <span className="text-xs">✓</span>}
          </span>
          Aucune signature
        </DropdownMenuItem>
        {SIGNATURES.map((sig) => (
          <DropdownMenuItem
            key={sig.id}
            onSelect={() => replaceSignature(sig.id)}
            className={cn("gap-2", compose.signatureId === sig.id && MAIL_COMPOSE_MENU_SELECTED_CLASS)}
          >
            <span className="flex h-4 w-4 items-center justify-center">
              {compose.signatureId === sig.id && <span className="text-xs">✓</span>}
            </span>
            {sig.name}
          </DropdownMenuItem>
        ))}
      </DropdownMenuContent>
    </DropdownMenu>
  )
}

export interface ComposeBottomToolbarProps {
  compose: ComposeState
  editor: Editor | null
  isEditingScheduled: boolean
  showFormatting: boolean
  sendMenuOpen: boolean
  setShowFormatting: (v: boolean | ((prev: boolean) => boolean)) => void
  setSendMenuOpen: (v: boolean) => void
  handleSend: () => void
  saveScheduledEdit: () => void | Promise<void>
  sendScheduledFromEditNow: () => void | Promise<void>
  applyScheduledPlanAt: (sendAt: Date) => void | Promise<void>
  submitScheduledSendAt: (sendAt: Date) => void | Promise<void>
  handleClose: () => void
  fileInputRef: React.RefObject<HTMLInputElement | null>
  imageInputRef: React.RefObject<HTMLInputElement | null>
}

export function ComposeBottomToolbar(props: ComposeBottomToolbarProps) {
  const {
    compose,
    editor,
    isEditingScheduled,
    showFormatting,
    sendMenuOpen,
    setShowFormatting,
    setSendMenuOpen,
    handleSend,
    saveScheduledEdit,
    sendScheduledFromEditNow,
    applyScheduledPlanAt,
    submitScheduledSendAt,
    handleClose,
    fileInputRef,
    imageInputRef,
  } = props
  return (
    <div className="flex shrink-0 items-center gap-1 border-t border-border px-2 py-1.5">
        {/* Send / save + dropdown */}
        <div className="flex items-center">
          {isEditingScheduled ? (
            <>
              <button
                type="button"
                onClick={() => void saveScheduledEdit()}
                className={cn("rounded-l-full px-5 text-sm font-medium", MAIL_COMPOSE_PRIMARY_SEND_BTN)}
              >
                Enregistrer
              </button>
              <DropdownMenu modal={false} open={sendMenuOpen} onOpenChange={setSendMenuOpen}>
                <DropdownMenuTrigger asChild>
                  <button
                    type="button"
                    className={cn("rounded-r-full border-l border-primary-foreground/30 px-1.5", MAIL_COMPOSE_PRIMARY_SEND_BTN)}
                  >
                    <ChevronDown className="h-4 w-4" />
                  </button>
                </DropdownMenuTrigger>
                <DropdownMenuContent align="start" className={cn("min-w-[220px]", COMPOSE_PORTAL_Z)}>
                  <DropdownMenuItem
                    onSelect={() => {
                      void sendScheduledFromEditNow()
                    }}
                  >
                    <Send className="h-4 w-4 text-muted-foreground" strokeWidth={1.5} />
                    Envoyer maintenant
                  </DropdownMenuItem>
                  <DropdownMenuSub>
                    <DropdownMenuSubTrigger className="[&>svg:last-child]:text-muted-foreground">
                      <Clock className="h-4 w-4 text-muted-foreground" strokeWidth={1.5} />
                      Planifier
                    </DropdownMenuSubTrigger>
                    <DropdownMenuSubContent className={cn("min-w-[220px]", COMPOSE_PORTAL_Z)}>
                      <DropdownMenuItem
                        onSelect={() => {
                          void applyScheduledPlanAt(
                            new Date(Date.now() + 60 * 60 * 1000)
                          )
                        }}
                      >
                        <Clock className="h-4 w-4 text-muted-foreground" strokeWidth={1.5} />
                        Envoyer dans une heure
                      </DropdownMenuItem>
                      <DropdownMenuItem
                        onSelect={() => {
                          void applyScheduledPlanAt(
                            getNextLocalWallClockDate(9, 0)
                          )
                        }}
                      >
                        <Clock className="h-4 w-4 text-muted-foreground" strokeWidth={1.5} />
                        Envoyer à 9h
                      </DropdownMenuItem>
                    </DropdownMenuSubContent>
                  </DropdownMenuSub>
                </DropdownMenuContent>
              </DropdownMenu>
            </>
          ) : (
            <>
              <button
                type="button"
                onClick={handleSend}
                className={cn("rounded-l-full px-5 text-sm font-medium", MAIL_COMPOSE_PRIMARY_SEND_BTN)}
              >
                Envoyer
              </button>
              <DropdownMenu modal={false} open={sendMenuOpen} onOpenChange={setSendMenuOpen}>
                <DropdownMenuTrigger asChild>
                  <button
                    type="button"
                    className={cn("rounded-r-full border-l border-primary-foreground/30 px-1.5", MAIL_COMPOSE_PRIMARY_SEND_BTN)}
                  >
                    <ChevronDown className="h-4 w-4" />
                  </button>
                </DropdownMenuTrigger>
                <DropdownMenuContent align="start" className={cn("min-w-[220px]", COMPOSE_PORTAL_Z)}>
                  <DropdownMenuItem
                    onSelect={() => {
                      void submitScheduledSendAt(
                        new Date(Date.now() + 60 * 60 * 1000)
                      )
                    }}
                  >
                    <Clock className="h-4 w-4 text-muted-foreground" />
                    Envoyer dans une heure
                  </DropdownMenuItem>
                  <DropdownMenuItem
                    onSelect={() => {
                      void submitScheduledSendAt(
                        getNextLocalWallClockDate(9, 0)
                      )
                    }}
                  >
                    <Clock className="h-4 w-4 text-muted-foreground" />
                    Envoyer à 9h
                  </DropdownMenuItem>
                  <DropdownMenuItem onSelect={() => setSendMenuOpen(false)}>
                    <Clock className="h-4 w-4 text-muted-foreground" />
                    Programmer l&apos;envoi
                  </DropdownMenuItem>
                </DropdownMenuContent>
              </DropdownMenu>
            </>
          )}
        </div>

        {/* Toolbar icons */}
        <div className="flex items-center gap-0.5 ml-1">
          <button
            type="button"
            onClick={() => setShowFormatting(!showFormatting)}
            className={cn(
              MAIL_COMPOSE_BOTTOM_ICON_BTN,
              showFormatting && MAIL_COMPOSE_BOTTOM_ICON_BTN_ACTIVE
            )}
            title="Options de mise en forme"
          >
            <Type className="h-[18px] w-[18px]" />
          </button>
          <button
            type="button"
            className={MAIL_COMPOSE_BOTTOM_ICON_BTN}
            title="Joindre des fichiers"
            onClick={() => fileInputRef.current?.click()}
          >
            <Paperclip className="h-[18px] w-[18px]" />
          </button>
          <ComposeLinkButton editor={editor} />
          <ComposeEmojiButton editor={editor} />
          <button
            type="button"
            className={MAIL_COMPOSE_BOTTOM_ICON_BTN}
            title="Insérer des fichiers avec Google Drive"
          >
            <HardDrive className="h-[18px] w-[18px]" />
          </button>
          <button
            type="button"
            className={MAIL_COMPOSE_BOTTOM_ICON_BTN}
            title="Insérer une photo"
            onClick={() => imageInputRef.current?.click()}
          >
            <ImageIcon className="h-[18px] w-[18px]" />
          </button>
          <button
            type="button"
            className={MAIL_COMPOSE_BOTTOM_ICON_BTN}
            title="Activer le mode confidentiel"
          >
            <Lock className="h-[18px] w-[18px]" />
          </button>
          <ComposeSignatureButton editor={editor} compose={compose} />
          <button
            type="button"
            className={MAIL_COMPOSE_BOTTOM_ICON_BTN}
            title="Plus d'options"
          >
            <MoreVertical className="h-[18px] w-[18px]" />
          </button>
        </div>

        <div className="flex-1" />

        <button
          type="button"
          onClick={handleClose}
          className={MAIL_COMPOSE_BOTTOM_ICON_BTN}
          title="Supprimer le brouillon"
        >
          <Trash2 className="h-[18px] w-[18px]" />
        </button>
    </div>
  )
}