import { getTeacherPostureReport, getTraineePostureReport } from '../../../utils/serve/posture';

function displayValue(value) {
  if (value === null || value === undefined || value === '') return '';
  if (typeof value === 'number') return String(Math.round(value * 100) / 100);
  if (typeof value === 'string') return value;
  return '';
}

function buildView(report) {
  const input = report.inputNormalized || {};
  const result = report.result || {};
  const prescription = result.prescription || {};
  const mapping = prescription.mapping || {};
  const messages = result.messages || {};
  const metrics = (report.metrics || []).map(item => ({
    key: item.key || item.name,
    name: item.name || item.label || item.key,
    value: displayValue(item.currentValue),
    unit: item.unit || '',
  })).filter(item => item.value !== '');
  const messageList = Object.keys(messages).map(key => ({ key, text: displayValue(messages[key]) })).filter(item => item.text);
  return {
    studentName: input.studentName || '',
    testDate: input.testDate || (report.generatedAt || '').slice(0, 10),
    age: result.age === null || result.age === undefined ? '' : String(result.age),
    bmi: displayValue(result.bmi),
    metrics,
    messageList,
    prescriptionSummary: displayValue(prescription.summary),
    actions: Array.isArray(mapping.actions) ? mapping.actions : [],
    homeTask: displayValue(mapping.homeTask),
    disclaimer: (report.rule || {}).disclaimer || '',
  };
}

Page({
  data: {
    teacherMode: false,
    studentNo: '',
    loading: true,
    empty: false,
    error: '',
    view: {},
  },

  onLoad(options) {
    this.setData({
      teacherMode: options.mode === 'teacher',
      studentNo: decodeURIComponent(options.studentNo || ''),
    });
    this.loadReport();
  },

  async loadReport() {
    this.setData({ loading: true, error: '', empty: false });
    try {
      const res = this.data.teacherMode
        ? await getTeacherPostureReport(this.data.studentNo)
        : await getTraineePostureReport();
      const report = res.data || res;
      if (!report || !report.success || !report.result) throw new Error('报告内容不完整');
      this.setData({ view: buildView(report), loading: false });
    } catch (e) {
      const message = e.message || '报告加载失败';
      this.setData({
        loading: false,
        empty: message.includes('未找到') || message.includes('暂无'),
        error: message,
      });
    }
  },

  async onPullDownRefresh() {
    await this.loadReport();
    wx.stopPullDownRefresh();
  },
});