import { defineStore } from 'pinia';
import { ref } from 'vue';
import { getScreenerSyncStatus, runScreener, startScreenerSync } from '@/api/client';
import type { ScreenerRunResponse, ScreenerSyncStatus } from '@/api/types';

export const useScreenerStore = defineStore('screener', () => {
  const loading = ref(false);
  const stage = ref<'idle' | 'parsing' | 'screening'>('idle');
  const note = ref<string | null>(null);
  const error = ref<string | null>(null);
  const result = ref<ScreenerRunResponse | null>(null);
  const syncStatus = ref<ScreenerSyncStatus | null>(null);
  let pollTimer: ReturnType<typeof setInterval> | null = null;

  async function run(text: string) {
    loading.value = true;
    error.value = null;
    result.value = null;
    note.value = 'AI 解析条件中…';
    stage.value = 'parsing';
    try {
      // 条件解析与全市场筛选在后端一气呵成；切到筛选阶段给个过渡提示
      setTimeout(() => {
        if (loading.value && stage.value === 'parsing') {
          stage.value = 'screening';
          note.value = '全市场筛选中…';
        }
      }, 1200);
      result.value = await runScreener({ text });
    } catch (e) {
      error.value = e instanceof Error ? e.message : '选股失败';
    } finally {
      loading.value = false;
      stage.value = 'idle';
      note.value = null;
    }
  }

  async function fetchStatus() {
    try {
      syncStatus.value = await getScreenerSyncStatus();
    } catch {
      /* 静默：状态拉取失败不阻塞页面 */
    }
  }

  function stopPolling() {
    if (pollTimer) {
      clearInterval(pollTimer);
      pollTimer = null;
    }
  }

  async function startSync(days = 90) {
    error.value = null;
    try {
      await startScreenerSync({ days });
      await fetchStatus();
      stopPolling();
      pollTimer = setInterval(async () => {
        await fetchStatus();
        if (syncStatus.value && !syncStatus.value.running) stopPolling();
      }, 2000);
    } catch (e) {
      error.value = e instanceof Error ? e.message : '启动同步失败';
    }
  }

  return { loading, stage, note, error, result, syncStatus, run, fetchStatus, startSync, stopPolling };
});