Page({
  data: {
    step: 1,
    logic: '',
    symbol: '',
    direction: 'long' as 'long' | 'short',
    entry_price: '',
    stop_loss: '',
    take_profit: '',
    upPct: 0,
    downPct: 0,
    odds: '',
    position_size: '',
  },
  onLogicInput(e: WechatMiniprogram.CustomEvent) {
    this.setData({ logic: (e.detail.value as string).trim() });
  },
  onSymbolInput(e: WechatMiniprogram.CustomEvent) {
    this.setData({ symbol: (e.detail.value as string).trim() });
  },
  setDir(e: WechatMiniprogram.CustomEvent) {
    this.setData({ direction: e.currentTarget.dataset.dir as 'long' | 'short' });
  },
  onEntryInput(e: WechatMiniprogram.CustomEvent) {
    this.setData({ entry_price: e.detail.value as string }, () => this.calc());
  },
  onStopInput(e: WechatMiniprogram.CustomEvent) {
    this.setData({ stop_loss: e.detail.value as string }, () => this.calc());
  },
  onTpInput(e: WechatMiniprogram.CustomEvent) {
    this.setData({ take_profit: e.detail.value as string }, () => this.calc());
  },
  calc() {
    const { entry_price, stop_loss, take_profit, direction } = this.data;
    const e = parseFloat(entry_price);
    const s = parseFloat(stop_loss);
    const t = parseFloat(take_profit);
    if (!e || !s || !t) return;
    const upPct = direction === 'long' ? ((t - e) / e * 100) : ((e - t) / e * 100);
    const downPct = direction === 'long' ? ((e - s) / e * 100) : ((s - e) / e * 100);
    const risk = direction === 'long' ? e - s : s - e;
    const reward = direction === 'long' ? t - e : e - t;
    const odds = risk > 0 && reward > 0 ? (reward / risk).toFixed(2) : '';
    this.setData({ upPct: upPct.toFixed(1), downPct: downPct.toFixed(1), odds });
  },
  nextStep() {
    const { step, logic } = this.data;
    if (step === 1 && logic.length < 30) return;
    if (step === 2) {
      this.setData({ position_size: '0.5', odds: this.data.odds || '-' });
    }
    this.setData({ step: step + 1 });
  },
  prevStep() {
    this.setData({ step: this.data.step - 1 });
  },
  onConfirm() {
    wx.showLoading({ title: '提交中' });
    setTimeout(() => {
      wx.hideLoading();
      wx.showToast({ title: '已创建' });
      wx.navigateBack();
    }, 800);
  },
});