import { ref } from 'vue';
import { fetchTunnelInterpretation, fetchDeviceInterpretation } from './api';
import { createTrigger, type TriggerHandle } from './useDataInterpretationTrigger';
import type { TodoItem, ToolCallRecord } from './types';

/** 数据解读 hook —— 调用后端 SSE 流式接口，实时追踪所有过程状态 */
export function useDataInterpretation() {
  const loading = ref(false);
  const streamingText = ref('');
  const error = ref<string | null>(null);
  const threadId = ref('');
  const sessionId = ref('');

  // 过程状态
  const thinking = ref(false);
  const todos = ref<TodoItem[]>([]);
  const executingTools = ref<string[]>([]);
  const toolCalls = ref<ToolCallRecord[]>([]);

  /** 统一的事件处理 */
  function handleEvent(event: any) {
    switch (event.type) {
      case 'thinking':
        thinking.value = true;
        break;
      case 'executing':
        thinking.value = false;
        executingTools.value = event.tools || [];
        break;
      case 'tool_call':
        executingTools.value = [];
        toolCalls.value = [...toolCalls.value, { tool: event.tool || '', source: event.source || 'main', status: 'call' as const }];
        break;
      case 'tool_result':
        // 更新最近一条 tool_call 为 result 状态
        if (toolCalls.value.length > 0) {
          const last = toolCalls.value[toolCalls.value.length - 1];
          if (last.tool === event.tool && last.status === 'call') {
            last.status = 'result';
          }
        }
        break;
      case 'updated_todo_list':
        thinking.value = false;
        todos.value = event.todos || [];
        break;
      case 'token':
        thinking.value = false;
        if (event.content) {
          streamingText.value += event.content;
        }
        break;
    }
  }

  async function interpretTunnel(params: { tun_id: string; tun_name: string }) {
    loading.value = true;
    error.value = null;
    streamingText.value = '';
    thinking.value = false;
    todos.value = [];
    executingTools.value = [];
    toolCalls.value = [];

    try {
      const result = await fetchTunnelInterpretation(params, handleEvent);
      threadId.value = result.thread_id;
      sessionId.value = result.session_id;
    } catch (e: any) {
      const msg = e?.message || '数据解读请求失败';
      error.value = msg;
      throw e;
    } finally {
      loading.value = false;
      thinking.value = false;
      executingTools.value = [];
    }
  }

  async function interpretDevice(params: { device_id: string; device_name: string; device_type: string }) {
    loading.value = true;
    error.value = null;
    streamingText.value = '';
    thinking.value = false;
    todos.value = [];
    executingTools.value = [];
    toolCalls.value = [];

    try {
      const result = await fetchDeviceInterpretation(params, handleEvent);
      threadId.value = result.thread_id;
      sessionId.value = result.session_id;
    } catch (e: any) {
      const msg = e?.message || '数据解读请求失败';
      error.value = msg;
      throw e;
    } finally {
      loading.value = false;
      thinking.value = false;
      executingTools.value = [];
    }
  }

  function reset() {
    streamingText.value = '';
    error.value = null;
    threadId.value = '';
    sessionId.value = '';
    thinking.value = false;
    todos.value = [];
    executingTools.value = [];
    toolCalls.value = [];
  }

  return {
    loading,
    streamingText,
    error,
    threadId,
    sessionId,
    thinking,
    todos,
    executingTools,
    toolCalls,
    interpretTunnel,
    interpretDevice,
    reset,
  };
}

/**
 * 数据解读列表级便捷 Hook。
 * 整合了弹框状态 + 每行数据的悬浮触发器管理 + SSE 流式解读。
 *
 * @param mapParams - 将列表行数据映射为接口请求参数
 *
 * 使用：在列表/表格/卡片组等 v-for 场景的组件中调用一次即可。
 */
export function useDataInterpretationList(
  mapParams: (item: any) => { tun_id: string; tun_name: string } | { device_id: string; device_name: string; device_type: string }
) {
  const { loading, streamingText, error, threadId, sessionId, thinking, todos, executingTools, toolCalls, interpretTunnel, interpretDevice, reset } =
    useDataInterpretation();

  const modalVisible = ref(false);
  const triggerMap = new Map<string, TriggerHandle>();

  function getTrigger(id: string): TriggerHandle {
    if (!triggerMap.has(id)) {
      triggerMap.set(id, createTrigger());
    }
    return triggerMap.get(id)!;
  }

  async function handleInterpret(item: any) {
    modalVisible.value = true;
    const params = mapParams(item);
    if ('tun_id' in params) {
      await interpretTunnel(params);
    } else {
      await interpretDevice(params);
    }
  }

  function handleClose() {
    modalVisible.value = false;
    reset();
  }

  return {
    modalVisible,
    loading,
    streamingText,
    error,
    threadId,
    sessionId,
    thinking,
    todos,
    executingTools,
    toolCalls,
    getTrigger,
    handleInterpret,
    handleClose,
  };
}