Page({
  /**
   * 页面的初始数据
   */
  data: {
    formData: {
      petType: '',
      petAge: '',
      petGender: '',
      symptoms: '',
      images: []
    },
    symptomsLength: 0,
    isSubmitting: false,
    isFormValid: false
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad(options) {
    // 初始化表单验证
    this.checkFormValidity();
  },


  // 宠物类型输入
  onPetTypeInput(e) {
    const value = e.detail.value;
    this.setData({
      'formData.petType': value
    }, () => {
      this.checkFormValidity();
    });
  },

  // 宠物年龄输入
  onPetAgeInput(e) {
    const value = e.detail.value;
    this.setData({
      'formData.petAge': value
    }, () => {
      this.checkFormValidity();
    });
  },

  // 选择性别
  selectGender(e) {
    const value = e.currentTarget.dataset.value;
    this.setData({
      'formData.petGender': value
    }, () => {
      this.checkFormValidity();
    });
  },

  // 症状描述输入
  onSymptomsInput(e) {
    const value = e.detail.value;
    this.setData({
      'formData.symptoms': value,
      symptomsLength: value.length
    }, () => {
      this.checkFormValidity();
    });
  },

  // 选择图片
  chooseImage() {
    if (this.data.formData.images.length >= 3) {
      wx.showToast({
        title: '最多上传3张图片',
        icon: 'none'
      });
      return;
    }

    wx.chooseImage({
      count: 3 - this.data.formData.images.length,
      sizeType: ['compressed'],
      sourceType: ['album', 'camera'],
      success: (res) => {
        const tempFilePaths = res.tempFilePaths;
        const images = [...this.data.formData.images, ...tempFilePaths];
        this.setData({
          'formData.images': images
        });
      }
    });
  },

  // 移除图片
  removeImage(e) {
    const index = e.currentTarget.dataset.index;
    const images = [...this.data.formData.images];
    images.splice(index, 1);
    this.setData({
      'formData.images': images
    });
  },

  // 预览图片
  previewImage(e) {
    const current = e.currentTarget.dataset.url;
    const urls = e.currentTarget.dataset.urls;
    
    wx.previewImage({
      current,
      urls
    });
  },

  // 检查表单有效性
  checkFormValidity() {
    const { petType, petAge, petGender, symptoms } = this.data.formData;
    const isValid = petType.trim() && petAge && petGender && symptoms.trim();
    this.setData({
      isFormValid: !!isValid
    });
  },

  // 表单提交
  submitForm(e) {
    if (this.data.isSubmitting || !this.data.isFormValid) {
      return;
    }

    this.setData({
      isSubmitting: true
    });

    // 模拟提交
    setTimeout(() => {
      wx.showToast({
        title: '提交成功',
        icon: 'success',
        duration: 1500,
        success: () => {
          setTimeout(() => {
           wx.navigateTo({
             url: '/pagesA/pages/askingSy/askingSy',
           })
          }, 1500);
        }
      });
    }, 1500);
  }
});