FabledGrimoire/frontend/src/components/ChatPanel.vue

<script setup lang="ts">
import { ref, computed, watch, nextTick, onMounted, onUnmounted } from "vue";
import { useChatStore } from "@/stores/chat";
import { renderMarkdown } from "@/utils/markdown";
import ChatMessage from "@/components/ChatMessage.vue";

const props = defineProps<{
  contextNoteId?: number | null;
}>();

const emit = defineEmits<{
  close: [];
}>();

const store = useChatStore();
const messageInput = ref("");
const messagesEl = ref<HTMLElement | null>(null);

const streamingRendered = computed(() => {
  if (!store.streamingContent) return "";
  return renderMarkdown(store.streamingContent);
});

watch(
  () => store.streamingContent,
  () => scrollToBottom()
);

const statusLabel = computed(() => {
  if (store.ollamaStatus === "unavailable") return "Unavailable";
  if (store.modelStatus === "not_found") return "Downloading...";
  if (store.chatReady) return "Connected";
  return "Checking...";
});

const statusClass = computed(() => {
  if (store.ollamaStatus === "unavailable") return "status-red";
  if (store.modelStatus === "not_found") return "status-yellow";
  if (store.chatReady) return "status-green";
  return "status-yellow";
});

function scrollToBottom() {
  nextTick(() => {
    if (messagesEl.value) {
      messagesEl.value.scrollTop = messagesEl.value.scrollHeight;
    }
  });
}

onMounted(() => {
  store.startStatusPolling();
});

onUnmounted(() => {
  store.stopStatusPolling();
});

async function sendMessage() {
  const content = messageInput.value.trim();
  if (!content || store.streaming) return;

  // Auto-create conversation if none active
  if (!store.currentConversation) {
    const conv = await store.createConversation();
    await store.fetchConversation(conv.id);
  }

  messageInput.value = "";
  scrollToBottom();
  await store.sendMessage(content, props.contextNoteId);
  scrollToBottom();
}

async function handleSaveAsNote(messageId: number) {
  try {
    await store.saveMessageAsNote(messageId);
    const { useToastStore } = await import("@/stores/toast");
    useToastStore().show("Saved as note");
  } catch {
    const { useToastStore } = await import("@/stores/toast");
    useToastStore().show("Failed to save as note", "error");
  }
}

function onInputKeydown(e: KeyboardEvent) {
  if (e.key === "Enter" && !e.shiftKey) {
    e.preventDefault();
    sendMessage();
  }
}
</script>

<template>
  <div class="chat-panel-overlay" @click.self="emit('close')">
    <aside class="chat-panel">
      <div class="panel-header">
        <h3>Chat</h3>
        <span class="status-indicator" :class="statusClass">
          <span class="status-dot"></span>
          {{ statusLabel }}
        </span>
        <span v-if="contextNoteId" class="context-indicator">
          Note #{{ contextNoteId }}
        </span>
        <button class="btn-close" @click="emit('close')">&times;</button>
      </div>

      <div ref="messagesEl" class="panel-messages">
        <template v-if="store.currentConversation">
          <ChatMessage
            v-for="msg in store.currentConversation.messages"
            :key="msg.id"
            :message="msg"
            @save-as-note="handleSaveAsNote"
          />
        </template>
        <div v-if="store.streaming" class="chat-message role-assistant streaming">
          <div class="message-header">
            <span class="role-label">Assistant</span>
          </div>
          <div class="message-content prose" v-html="streamingRendered"></div>
          <span class="typing-indicator"></span>
        </div>
        <p
          v-if="!store.currentConversation?.messages.length && !store.streaming"
          class="empty-msg"
        >
          Start chatting...
        </p>
      </div>

      <div class="panel-input">
        <textarea
          v-model="messageInput"
          @keydown="onInputKeydown"
          :placeholder="store.chatReady ? 'Type a message...' : statusLabel"
          :disabled="store.streaming || !store.chatReady"
          rows="2"
        ></textarea>
        <button
          class="btn-send"
          @click="sendMessage"
          :disabled="!messageInput.trim() || store.streaming || !store.chatReady"
        >
          Send
        </button>
      </div>
    </aside>
  </div>
</template>

<style scoped>
.chat-panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 100;
  display: flex;
  justify-content: flex-end;
}

.chat-panel {
  width: 400px;
  max-width: 100vw;
  height: 100%;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  box-shadow: -2px 0 8px rgba(0, 0, 0, 0.15);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
}
.panel-header h3 {
  margin: 0;
  font-size: 1rem;
  flex: 1;
}
.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.status-green .status-dot {
  background: #22c55e;
}
.status-yellow .status-dot {
  background: #eab308;
  animation: pulse-dot 2s infinite;
}
.status-red .status-dot {
  background: #ef4444;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.context-indicator {
  font-size: 0.8rem;
  color: var(--color-primary);
  background: var(--color-bg-secondary);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}
.btn-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
  padding: 0 0.25rem;
}
.btn-close:hover {
  color: var(--color-text);
}

.panel-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
}

.streaming {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  background: var(--color-bg-card);
  margin-bottom: 0.5rem;
}
.streaming .message-header {
  display: flex;
  align-items: center;
  margin-bottom: 0.25rem;
}
.streaming .role-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
}
.streaming .message-content {
  font-size: 0.95rem;
  line-height: 1.5;
  word-break: break-word;
}

.typing-indicator {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: blink 1s infinite;
  margin-left: 4px;
  vertical-align: middle;
}
@keyframes blink {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.panel-input {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}
.panel-input textarea {
  flex: 1;
  resize: none;
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.9rem;
  background: var(--color-bg);
  color: var(--color-text);
}
.panel-input textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}
.btn-send {
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  align-self: flex-end;
}
.btn-send:disabled {
  opacity: 0.5;
  cursor: default;
}

.empty-msg {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 2rem 1rem;
}

@media (max-width: 480px) {
  .chat-panel {
    width: 100vw;
  }
}
</style>