nuxt-app/app/pages/settings/llm-test/index.vue

<script setup lang="ts">
import { processDataStream } from 'ai'
interface ModelOption {
  id: number
  name: string
  modelId: string
  type: string
  maxTokens: number | null
}

interface ProviderWithModels {
  id: number
  name: string
  parseMode: string
  status: string
  models: ModelOption[]
}

interface ChatMessage {
  id: string
  role: 'user' | 'assistant'
  content: string
}

const { data: modelsData, refresh: refreshModels } = await useHttpFetch('/api/llm/chat/models', {
  getCachedData: () => undefined,
})

onActivated(() => {
  refreshModels()
})

const providers = computed<ProviderWithModels[]>(() => (modelsData.value as any) ?? [])

const allModels = computed(() => {
  const result: (ModelOption & { providerName: string; providerId: number })[] = []
  for (const p of providers.value) {
    for (const m of p.models) {
      result.push({ ...m, providerName: p.name, providerId: p.id })
    }
  }
  return result
})

const selectedModelId = ref<number | null>(null)
const chatContainer = ref<HTMLElement | null>(null)
const messages = ref<ChatMessage[]>([])
const inputMessage = ref('')
const isLoading = ref(false)
const errorMessage = ref('')
let abortController: AbortController | null = null

const selectedModel = computed(() => {
  if (!selectedModelId.value) return null
  return allModels.value.find(m => m.id === selectedModelId.value) ?? null
})

function showToast(message: string, type: 'success' | 'error' = 'success') {
  if (import.meta.client) {
    const event = new CustomEvent('toast', { detail: { message, type } })
    window.dispatchEvent(event)
  }
}

function generateId() {
  return Date.now().toString(36) + Math.random().toString(36).slice(2)
}

watch(messages, () => {
  nextTick(() => {
    if (chatContainer.value) {
      chatContainer.value.scrollTop = chatContainer.value.scrollHeight
    }
  })
}, { deep: true })

async function sendMessage() {
  const text = inputMessage.value.trim()
  if (!text || !selectedModelId.value || isLoading.value) return

  errorMessage.value = ''
  inputMessage.value = ''

  const userMsg: ChatMessage = { id: generateId(), role: 'user', content: text }
  messages.value.push(userMsg)

  const assistantMsg: ChatMessage = { id: generateId(), role: 'assistant', content: '' }
  messages.value.push(assistantMsg)
  const assistantIdx = messages.value.length - 1

  isLoading.value = true
  abortController = new AbortController()

  try {
    const res = await fetch('/api/llm/chat', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        modelId: selectedModelId.value,
        messages: messages.value
          .filter(m => m.content)
          .map(m => ({ role: m.role, content: m.content })),
      }),
      signal: abortController.signal,
    })

    if (!res.ok) {
      const errText = await res.text()
      throw new Error(errText || `请求失败 (${res.status})`)
    }

    if (!res.body) {
      throw new Error('响应体为空')
    }

    await processDataStream({
      stream: res.body,
      onTextPart: (text) => {
        messages.value[assistantIdx].content += text
      },
      onErrorPart: (error) => {
        errorMessage.value = error || '流式响应出错'
        showToast(errorMessage.value, 'error')
      },
    })
  } catch (err: any) {
    if (err.name === 'AbortError') {
      // user stopped
    } else {
      errorMessage.value = err.message || '请求失败'
      showToast(err.message || '请求失败', 'error')
      if (!messages.value[assistantIdx].content) {
        messages.value.splice(assistantIdx, 1)
      }
    }
  } finally {
    isLoading.value = false
    abortController = null
  }
}

function stopGeneration() {
  if (abortController) {
    abortController.abort()
    abortController = null
  }
}

function clearChat() {
  messages.value = []
  errorMessage.value = ''
}

function handleKeydown(e: KeyboardEvent) {
  if (e.key === 'Enter' && !e.shiftKey) {
    e.preventDefault()
    sendMessage()
  }
}

function modelTypeLabel(type: string) {
  const map: Record<string, string> = { text: '文本', vision: '视觉', multimodal: '多模态' }
  return map[type] ?? type
}

function modelTypeClass(type: string) {
  const map: Record<string, string> = { text: 'type-text', vision: 'type-vision', multimodal: 'type-multimodal' }
  return map[type] ?? 'type-text'
}

function renderContent(content: string): string {
  if (!content) return ''
  return content
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/\n/g, '<br>')
    .replace(/`([^`]+)`/g, '<code>$1</code>')
    .replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>')
}
</script>

<template>
  <div class="llm-test-page">
    <header class="page-header">
      <div class="header-left">
        <h1 class="page-title">模型测试</h1>
        <p class="page-desc">选择已配置的模型进行对话测试，验证模型连接和响应效果</p>
      </div>
    </header>

    <div class="test-layout">
      <div class="sidebar-panel">
        <div class="panel-section">
          <label class="panel-label">选择模型</label>
          <select v-model="selectedModelId" class="model-select">
            <option :value="null" disabled>请选择模型</option>
            <optgroup v-for="p in providers" :key="p.id" :label="p.name">
              <option v-for="m in p.models" :key="m.id" :value="m.id">
                {{ m.name }} ({{ m.modelId }})
              </option>
            </optgroup>
          </select>
        </div>

        <div v-if="selectedModel" class="model-info-card">
          <div class="model-info-header">
            <span class="model-info-name">{{ selectedModel.name }}</span>
            <span :class="['model-type-badge', modelTypeClass(selectedModel.type)]">{{ modelTypeLabel(selectedModel.type) }}</span>
          </div>
          <div class="model-info-meta">
            <span class="meta-item">
              <Icon name="lucide:cpu" />
              {{ selectedModel.modelId }}
            </span>
            <span class="meta-item">
              <Icon name="lucide:server" />
              {{ selectedModel.providerName }}
            </span>
            <span v-if="selectedModel.maxTokens" class="meta-item">
              <Icon name="lucide:arrow-up-right" />
              {{ selectedModel.maxTokens.toLocaleString() }} tokens
            </span>
          </div>
        </div>

        <div v-if="allModels.length === 0" class="empty-hint">
          暂无可用模型，请先在<a href="/settings/llm-config" class="link">模型配置</a>中添加
        </div>

        <div class="panel-section panel-actions">
          <button class="btn-secondary" :disabled="messages.length === 0" @click="clearChat">
            <Icon name="lucide:trash-2" />
            清空对话
          </button>
        </div>
      </div>

      <div class="chat-panel">
        <div v-if="!selectedModelId" class="chat-empty">
          <div class="chat-empty-icon">
            <Icon name="lucide:message-square-text" />
          </div>
          <p>选择一个模型开始对话测试</p>
        </div>

        <template v-else>
          <div ref="chatContainer" class="chat-messages">
            <div v-if="messages.length === 0" class="chat-welcome">
              <div class="welcome-icon">
                <Icon name="lucide:sparkles" />
              </div>
              <p class="welcome-text">开始与 {{ selectedModel?.name ?? '模型' }} 对话</p>
              <p class="welcome-hint">输入消息测试模型连接和响应效果</p>
            </div>

            <template v-for="msg in messages" :key="msg.id">
              <div
                v-if="msg.content || msg.role === 'user'"
                class="chat-message"
                :class="[`message-${msg.role}`]"
              >
                <div class="message-avatar">
                  <Icon v-if="msg.role === 'user'" name="lucide:user" />
                  <Icon v-else name="lucide:bot" />
                </div>
                <div class="message-body">
                  <div class="message-role">{{ msg.role === 'user' ? '你' : '助手' }}</div>
                  <div class="message-content" v-html="renderContent(msg.content)"></div>
                </div>
              </div>
            </template>

            <div v-if="isLoading && messages.length > 0 && messages[messages.length - 1]?.content === ''" class="chat-message message-assistant">
              <div class="message-avatar">
                <Icon name="lucide:bot" />
              </div>
              <div class="message-body">
                <div class="message-role">助手</div>
                <div class="message-content typing-indicator">
                  <span></span><span></span><span></span>
                </div>
              </div>
            </div>
          </div>

          <div v-if="errorMessage" class="chat-error">
            <Icon name="lucide:alert-circle" />
            {{ errorMessage }}
          </div>

          <div class="chat-input-area">
            <div class="input-wrapper">
              <textarea
                v-model="inputMessage"
                class="chat-input"
                placeholder="输入消息... (Enter 发送, Shift+Enter 换行)"
                rows="1"
                :disabled="isLoading"
                @keydown="handleKeydown"
              ></textarea>
              <div class="input-actions">
                <button
                  v-if="isLoading"
                  class="btn-stop"
                  @click="stopGeneration"
                >
                  <Icon name="lucide:square" />
                  停止
                </button>
                <button
                  v-else
                  class="btn-send"
                  :disabled="!inputMessage.trim() || !selectedModelId"
                  @click="sendMessage"
                >
                  <Icon name="lucide:send" />
                </button>
              </div>
            </div>
          </div>
        </template>
      </div>
    </div>
  </div>
</template>

<style scoped>
.llm-test-page {
  padding: 40px;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.page-header {
  margin-bottom: 24px;
}

.page-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 400;
  color: var(--color-ink);
  letter-spacing: -0.3px;
  margin: 0 0 8px 0;
}

.page-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin: 0;
}

.test-layout {
  display: flex;
  gap: 20px;
  flex: 1;
  min-height: 0;
  max-height: calc(100vh - 200px);
}

.sidebar-panel {
  width: 280px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.panel-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-body-strong);
}

.model-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: 8px;
  font-size: 14px;
  color: var(--color-ink);
  cursor: pointer;
  transition: all 0.15s ease;
}

.model-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(204, 120, 92, 0.15);
}

.model-info-card {
  background: var(--color-surface-card);
  border-radius: 10px;
  padding: 14px 16px;
}

.model-info-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.model-info-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
}

.model-type-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 500;
}

.type-text {
  background: rgba(93, 184, 166, 0.15);
  color: var(--color-accent-teal);
}

.type-vision {
  background: rgba(232, 165, 90, 0.15);
  color: var(--color-accent-amber);
}

.type-multimodal {
  background: rgba(204, 120, 92, 0.15);
  color: var(--color-primary);
}

.model-info-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--color-muted);
}

.meta-item :deep(svg) {
  width: 13px;
  height: 13px;
}

.empty-hint {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

.link {
  color: var(--color-primary);
  text-decoration: none;
}

.link:hover {
  text-decoration: underline;
}

.panel-actions {
  margin-top: auto;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-body-strong);
  background: var(--color-surface-soft);
  border: 1px solid var(--color-hairline);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  width: 100%;
  justify-content: center;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-hairline);
}

.btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-secondary :deep(svg) {
  width: 14px;
  height: 14px;
}

.chat-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-surface-card);
  border-radius: 12px;
  overflow: hidden;
  min-width: 0;
}

.chat-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--color-muted);
}

.chat-empty-icon :deep(svg) {
  width: 48px;
  height: 48px;
  opacity: 0.3;
}

.chat-empty p {
  font-size: 14px;
  margin: 0;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: 8px;
}

.welcome-icon :deep(svg) {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  opacity: 0.6;
}

.welcome-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-ink);
  margin: 0;
}

.welcome-hint {
  font-size: 13px;
  color: var(--color-muted);
  margin: 0;
}

.chat-message {
  display: flex;
  gap: 12px;
  max-width: 85%;
}

.message-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message-assistant {
  align-self: flex-start;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.message-user .message-avatar {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.message-assistant .message-avatar {
  background: var(--color-surface-soft);
  color: var(--color-body-strong);
}

.message-avatar :deep(svg) {
  width: 16px;
  height: 16px;
}

.message-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.message-role {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-muted);
}

.message-user .message-role {
  text-align: right;
}

.message-content {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-body);
  word-break: break-word;
}

.message-user .message-content {
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 10px 14px;
  border-radius: 12px 12px 4px 12px;
}

.message-assistant .message-content {
  background: var(--color-canvas);
  padding: 10px 14px;
  border-radius: 12px 12px 12px 4px;
  border: 1px solid var(--color-hairline);
}

.message-content :deep(code) {
  background: rgba(0, 0, 0, 0.06);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 13px;
  font-family: monospace;
}

.message-user .message-content :deep(code) {
  background: rgba(255, 255, 255, 0.2);
}

.typing-indicator {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 10px 14px;
}

.typing-indicator span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-muted);
  animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  30% {
    opacity: 1;
    transform: scale(1);
  }
}

.chat-error {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(198, 69, 69, 0.1);
  color: var(--color-error);
  font-size: 13px;
}

.chat-error :deep(svg) {
  width: 14px;
  height: 14px;
}

.chat-input-area {
  padding: 16px 20px;
  border-top: 1px solid var(--color-hairline);
  background: var(--color-canvas);
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: 10px;
  padding: 8px 12px;
  transition: all 0.15s ease;
}

.input-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(204, 120, 92, 0.15);
}

.chat-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--color-ink);
  resize: none;
  outline: none;
  min-height: 24px;
  max-height: 120px;
  line-height: 1.5;
  font-family: inherit;
}

.chat-input::placeholder {
  color: var(--color-muted);
}

.chat-input:disabled {
  opacity: 0.5;
}

.input-actions {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.btn-send {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.btn-send:hover:not(:disabled) {
  background: var(--color-primary-active);
}

.btn-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-send :deep(svg) {
  width: 16px;
  height: 16px;
}

.btn-stop {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-error);
  background: rgba(198, 69, 69, 0.1);
  border: 1px solid rgba(198, 69, 69, 0.2);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-stop:hover {
  background: rgba(198, 69, 69, 0.2);
}

.btn-stop :deep(svg) {
  width: 12px;
  height: 12px;
}

@media (max-width: 768px) {
  .llm-test-page {
    padding: 24px;
  }

  .test-layout {
    flex-direction: column;
    max-height: none;
  }

  .sidebar-panel {
    width: 100%;
  }

  .chat-panel {
    min-height: 500px;
  }

  .chat-message {
    max-width: 95%;
  }
}
</style>