import { useParams } from "react-router-dom";
import { useCallback, useState } from "react";
import { useSignaling } from "../hooks/useSignaling";
import { useStore } from "../stores/useStore";
import { useProfileStore } from "../stores/useProfileStore";
import PeerList from "../components/PeerList";
import DropZone from "../components/DropZone";
import TransferProgress from "../components/TransferProgress";
import TextShareModal from "../components/TextShareModal";
import ReceiveDialog from "../components/ReceiveDialog";
import ProfileSetup from "../components/ProfileSetup";

export default function JoinRoom() {
  const { code } = useParams<{ code: string }>();
  const isSetUp = useProfileStore((s) => s.isSetUp);

  if (!isSetUp) {
    return <ProfileSetup onDone={() => {}} />;
  }

  return <JoinRoomConnected code={code} />;
}

function JoinRoomConnected({ code }: { code?: string }) {
  const { sendFiles, sendText, acceptTransfer, rejectTransfer } = useSignaling(code);

  const { deviceName, avatar } = useProfileStore();
  const [showProfileEdit, setShowProfileEdit] = useState(false);
  const selectedPeerId = useStore((s) => s.selectedPeerId);
  const showTextModal = useStore((s) => s.showTextModal);
  const incomingRequest = useStore((s) => s.incomingRequest);
  const error = useStore((s) => s.error);
  const setSelectedPeerId = useStore((s) => s.setSelectedPeerId);
  const setShowTextModal = useStore((s) => s.setShowTextModal);
  const setError = useStore((s) => s.setError);

  const handlePeerSelect = useCallback(
    (peerId: string) => {
      setSelectedPeerId(selectedPeerId === peerId ? null : peerId);
    },
    [selectedPeerId, setSelectedPeerId],
  );

  const handleFilesSelected = useCallback(
    (files: File[]) => {
      if (!selectedPeerId) return;
      sendFiles(selectedPeerId, files);
    },
    [selectedPeerId, sendFiles],
  );

  const handleSendText = useCallback(
    (text: string) => {
      if (!selectedPeerId) return;
      sendText(selectedPeerId, text);
    },
    [selectedPeerId, sendText],
  );

  const handleAcceptTransfer = useCallback(() => {
    if (incomingRequest) {
      if (incomingRequest.text && incomingRequest.files.length === 0) {
        navigator.clipboard.writeText(incomingRequest.text);
        useStore.getState().setIncomingRequest(null);
      } else {
        acceptTransfer(incomingRequest.peerId);
      }
    }
  }, [incomingRequest, acceptTransfer]);

  const handleRejectTransfer = useCallback(() => {
    if (incomingRequest) {
      rejectTransfer(incomingRequest.peerId);
    }
  }, [incomingRequest, rejectTransfer]);

  return (
    <div className="min-h-screen">
      <div className="max-w-xl mx-auto px-5 sm:px-8 pt-10 pb-24">
        <header className="flex items-start justify-between pb-8 mb-10 rule">
          <div>
            <div className="text-xs uppercase tracking-[0.2em] text-ink-muted">
              Public room
            </div>
            <h1 className="font-display text-3xl leading-none tracking-tight text-ink mt-2">
              AnyDrop
            </h1>
            <p className="font-mono text-xs uppercase tracking-[0.25em] text-signal mt-3">
              {code?.toUpperCase()}
            </p>
          </div>
          <button
            onClick={() => setShowProfileEdit(true)}
            className="group flex items-center gap-2.5 px-3 py-2 border border-paper-edge
                       hover:border-ink transition-colors duration-fast ease-crisp
                       bg-paper rounded-sm"
          >
            {avatar ? (
              <img
                src={avatar}
                alt=""
                className="w-5 h-5 rounded-full object-cover border border-paper-edge"
              />
            ) : (
              <span className="w-5 h-5 rounded-full bg-paper-deep border border-paper-edge" />
            )}
            <span className="text-sm text-ink truncate max-w-[120px]">{deviceName}</span>
          </button>
        </header>

        {error && (
          <div className="mb-8 px-4 py-3 border border-fail/40 bg-signal-quiet flex items-center justify-between rounded-sm">
            <span className="text-sm text-ink">{error}</span>
            <button
              onClick={() => setError(null)}
              className="ml-3 text-ink-muted hover:text-ink text-lg leading-none"
              aria-label="Dismiss"
            >
              ×
            </button>
          </div>
        )}

        <section className="mb-12">
          <div className="text-xs uppercase tracking-[0.22em] text-ink-muted">
            Room peers
          </div>
          <h2 className="font-display text-2xl text-ink mt-2 mb-5 tracking-tight">
            Who's here
          </h2>
          <PeerList onPeerSelect={handlePeerSelect} />
        </section>

        {selectedPeerId && (
          <section className="mb-12">
            <div className="text-xs uppercase tracking-[0.22em] text-ink-muted">
              Compose
            </div>
            <h2 className="font-display text-2xl text-ink mt-2 mb-5 tracking-tight">
              Drop files or send text
            </h2>
            <div className="space-y-3">
              <DropZone onFilesSelected={handleFilesSelected} />
              <button
                onClick={() => setShowTextModal(true)}
                className="w-full text-left px-4 py-3 border border-paper-edge bg-paper
                           hover:bg-paper-deep transition-colors duration-fast ease-crisp
                           rounded-sm text-sm text-ink"
              >
                Send text instead →
              </button>
            </div>
          </section>
        )}

        <section className="mb-12">
          <div className="text-xs uppercase tracking-[0.22em] text-ink-muted">
            Activity
          </div>
          <TransferProgress />
        </section>

        <footer className="pt-8 mt-14 rule flex items-center justify-between text-xs text-ink-muted">
          <span>End-to-end encrypted · Nothing transits the server</span>
          <a
            href="/"
            className="text-ink hover:text-signal transition-colors duration-fast"
          >
            Home →
          </a>
        </footer>
      </div>

      {showProfileEdit && (
        <ProfileSetup isEditing onDone={() => setShowProfileEdit(false)} />
      )}

      {showTextModal && selectedPeerId && (
        <TextShareModal
          onSend={handleSendText}
          onClose={() => setShowTextModal(false)}
        />
      )}

      {incomingRequest && (
        <ReceiveDialog
          request={incomingRequest}
          onAccept={handleAcceptTransfer}
          onReject={handleRejectTransfer}
        />
      )}
    </div>
  );
}