/**
 * 举报页 U26（重构：用 safetyService.submitReport + ui-nav-bar + ui-textarea）
 *
 * 流程：原因选择 → 补充说明（高风险必填）→ 证据截图（选填）→ 提交
 *
 * 不变量（AGENTS.md）：
 *   - 第 8 条：敏感数据默认拒绝——本页只接收 reason + 证据截图，不接受身份证/手机号等敏感字段。
 *   - 第 4 条：Block 优先级最高——举报不会自动 Block，是否拉黑由用户主动操作；举报后由运营人工处置。
 *   - 第 6 条：单向意向不泄露——举报内容仅提交给运营，不向对方透露。
 * 幂等：safetyService.submitReport 内部以 targetUserId+reportType+秒级时间生成 Idempotency-Key。
 */
const { appStore } = require('../../stores');
const { safetyService } = require('../../services');

// 举报原因选项（reportType 对齐后端枚举）
const REPORT_REASONS = [
  { value: 'fake_profile', label: '虚假资料' },
  { value: 'fake_marital_status', label: '婚姻状态疑似虚假' },
  { value: 'harassment', label: '骚扰' },
  { value: 'pornography', label: '色情低俗' },
  { value: 'advertising', label: '广告营销' },
  { value: 'fraud', label: '诈骗' },
  { value: 'money_inducement', label: '金钱诱导' },
  { value: 'impersonation', label: '冒充他人' },
  { value: 'other', label: '其他' },
];

// 高风险举报需必填说明
const HIGH_RISK_REASONS = new Set(['fraud', 'money_inducement', 'impersonation', 'fake_marital_status']);

const MAX_EVIDENCE = 9;

Page({
  data: {
    targetUserId: '',
    targetName: '',
    reportType: '',
    description: '',
    evidenceFiles: [],
    submitting: false,
    submitted: false,
    reportReasons: REPORT_REASONS,
    highRiskReason: false,
    descError: '',
    statusBarHeight: 20,
    navBarHeight: 44,
  },

  onLoad(options) {
    try {
      const info = (wx.getWindowInfo && wx.getWindowInfo()) || wx.getSystemInfoSync();
      this.setData({
        statusBarHeight: info.statusBarHeight || 20,
        navBarHeight: info.platform === 'android' ? 48 : 44,
      });
    } catch (e) { /* 使用默认值 */ }

    if (options.userId) this.setData({ targetUserId: decodeURIComponent(options.userId) });
    if (options.name) this.setData({ targetName: decodeURIComponent(options.name) });
  },

  onReasonChange(e) {
    const value = e.currentTarget.dataset.value;
    const isHighRisk = HIGH_RISK_REASONS.has(value);
    this.setData({
      reportType: value,
      highRiskReason: isHighRisk,
      descError: '',
    });
  },

  onDescInput(e) {
    const value = e.detail.value;
    this.setData({ description: value, descError: '' });
  },

  // ============ 证据截图 ============

  chooseImage() {
    const remain = MAX_EVIDENCE - this.data.evidenceFiles.length;
    if (remain <= 0) {
      appStore.toast('最多上传 9 张截图');
      return;
    }
    wx.chooseMedia({
      count: remain,
      mediaType: ['image'],
      sourceType: ['album', 'camera'],
      success: (res) => {
        const files = res.tempFiles.map((f) => f.tempFilePath);
        this.setData({ evidenceFiles: [...this.data.evidenceFiles, ...files] });
      },
    });
  },

  previewImage(e) {
    wx.previewImage({
      current: e.currentTarget.dataset.url,
      urls: this.data.evidenceFiles,
    });
  },

  removeImage(e) {
    const idx = e.currentTarget.dataset.index;
    const files = this.data.evidenceFiles;
    files.splice(idx, 1);
    this.setData({ evidenceFiles: files });
  },

  // ============ 提交 ============

  async submitReport() {
    const { targetUserId, reportType, description, highRiskReason } = this.data;

    if (!targetUserId) {
      appStore.toast('缺少举报对象');
      return;
    }
    if (!reportType) {
      appStore.toast('请选择举报原因');
      return;
    }
    const desc = (description || '').trim();
    if (highRiskReason && !desc) {
      this.setData({ descError: '该类举报需补充说明（必填）' });
      return;
    }

    this.setData({ submitting: true });
    try {
      await safetyService.submitReport({
        targetUserId,
        reportType,
        description: desc,
        // 证据上传至 OSS 后回填 fileId；当前阶段先以本地路径占位，由后端证据服务接入后补全
        evidenceFileIds: [],
      });
      this.setData({ submitted: true, submitting: false });
      appStore.toastSuccess('举报已提交');
    } catch (err) {
      appStore.toastError(err);
      this.setData({ submitting: false });
    }
  },

  goBack() {
    if (this.data.submitted) {
      wx.navigateBack();
    } else {
      wx.navigateBack();
    }
  },

  onBack() {
    wx.navigateBack();
  },
});