const fortuneStore = require("../../store/fortuneStore");
const messages = require("../../constants/messages");
const { analyzeFortune } = require("../../services/fortuneService");
const { showRewardedVideoAd } = require("../../utils/adService");
const { getPageSafeTop } = require("../../utils/safeArea");
const { formatRegionDisplay, deriveRegionFromParts, getRegionParts, normalizeRegionArray } = require("../../utils/region");

const LOADING_HINTS = [
  "正在推演今日天干地支，请稍候...",
  "为你梳理六维度能量波动...",
  "结合命盘与今日日运，编排最佳行动节奏..."
];

function showToast(title) {
  if (typeof tt === "undefined" || !tt.showToast) {
    console.warn("Toast:", title);
    return;
  }
  tt.showToast({
    title,
    icon: "none",
    duration: 2000
  });
}

Page({
  data: {
    birthDate: "",
    birthTime: "",
    selectedCity: "",
    selectedProvince: "",
    selectedDistrict: "",
    regionValue: [],
    regionDisplay: "",
    isSubmitting: false,
    isLoading: false,
    loadingMessage: "",
    safeAreaTop: 64,
    tips: [
      "建议每天专注测算一次，深度分析更精准",
      "填写精确城市，可获得更贴近地域气场的指引",
      "保持心态稳定，才能更好接住好运"
    ],
    tipIndex: 0
  },
  onLoad() {
    const { form } = fortuneStore.getState();
    const persistedRegion = normalizeRegionArray(form.birthRegion);
    const regionValue = persistedRegion.length ? persistedRegion : this.getInitialRegionValue(form);
    const parts = getRegionParts(regionValue, {
      province: form.birthProvince,
      city: form.birthCity,
      district: form.birthDistrict
    });
    this.setData({
      birthDate: form.birthDate,
      birthTime: form.birthTime,
      selectedProvince: parts.province,
      selectedCity: parts.city,
      selectedDistrict: parts.district,
      regionValue,
      regionDisplay: formatRegionDisplay(regionValue, [parts.province, parts.city, parts.district]),
      tipIndex: Math.floor(Math.random() * this.data.tips.length)
    });
    if (!persistedRegion.length && regionValue.length && parts.city) {
      fortuneStore.setForm({
        birthProvince: parts.province,
        birthCity: parts.city,
        birthDistrict: parts.district,
        birthRegion: regionValue
      });
    }
    this.updateSafeAreaPadding();
  },
  getInitialRegionValue(form) {
    return deriveRegionFromParts({
      province: form.birthProvince,
      city: form.birthCity,
      district: form.birthDistrict
    });
  },
  updateSafeAreaPadding() {
    const padding = getPageSafeTop();
    this.setData({ safeAreaTop: padding });
  },
  resetRegionState() {
    this.setData({
      regionValue: [],
      selectedProvince: "",
      selectedCity: "",
      selectedDistrict: "",
      regionDisplay: ""
    });
  },
  syncRegion(regionValue, fallbackParts = {}, options = {}) {
    let normalized = normalizeRegionArray(regionValue);
    if (!normalized.length) {
      normalized = deriveRegionFromParts(fallbackParts);
    }
    const parts = getRegionParts(normalized, fallbackParts);
    if (!parts.city) {
      if (options.resetOnEmpty) {
        this.resetRegionState();
      }
      return false;
    }
    this.setData({
      regionValue: normalized,
      selectedProvince: parts.province,
      selectedCity: parts.city,
      selectedDistrict: parts.district,
      regionDisplay: formatRegionDisplay(normalized, [parts.province, parts.city, parts.district])
    });
    if (options.persist !== false) {
      fortuneStore.setForm({
        birthProvince: parts.province,
        birthCity: parts.city,
        birthDistrict: parts.district,
        birthRegion: normalized
      });
    }
    return true;
  },
  handleDateChange(event) {
    const value = event.detail.value;
    this.setData({ birthDate: value });
    fortuneStore.setForm({ birthDate: value });
  },
  handleTimeChange(event) {
    const value = event.detail.value;
    this.setData({ birthTime: value });
    fortuneStore.setForm({ birthTime: value });
  },
  handleRegionChange(event) {
    const value = event.detail.value || [];
    this.syncRegion(value, {}, { resetOnEmpty: true });
  },
  handleLocate() {
    if (typeof tt === "undefined" || !tt.chooseLocation) {
      showToast("当前端暂不支持定位");
      return;
    }
    tt.chooseLocation({
      success: (res) => {
        const city = this.extractCity(res.address || res.name || "");
        if (!city) {
          showToast("未能识别所在城市，请通过选择器选择");
          return;
        }
        const segments = this.parseAddressSegments(res);
        const fallback = {
          province: segments[0] || res.province || "",
          city,
          district: segments[2] || res.district || ""
        };
        this.syncRegion(segments, fallback, { resetOnEmpty: true });
      },
      fail: () => {
        showToast("定位失败，请检查权限后重试");
      }
    });
  },
  extractCity(text) {
    if (!text) {
      return "";
    }
    const cityMatch = text.match(/([\u4e00-\u9fa5]+?(市|自治州|地区|盟))/);
    if (cityMatch) {
      return cityMatch[1];
    }
    const districtMatch = text.match(/([\u4e00-\u9fa5]+?(区|县))/);
    if (districtMatch) {
      return districtMatch[1].replace(/(区|县)$/, "市");
    }
    return "";
  },
  parseAddressSegments(locationResult) {
    const segments = [];
    const province = locationResult.province || "";
    const city = locationResult.city || "";
    const address = locationResult.address || "";
    const text = `${province}${city}${address}`;
    const provinceMatch = text.match(/([\u4e00-\u9fa5]+?(省|自治区|特别行政区))/);
    const cityMatch = text.match(/([\u4e00-\u9fa5]+?(市|自治州|地区|盟))/);
    const districtMatch = text.match(/([\u4e00-\u9fa5]+?(区|县|市))/);
    if (provinceMatch) {
      segments.push(provinceMatch[1]);
    }
    if (cityMatch) {
      segments.push(cityMatch[1]);
    }
    if (districtMatch && (!segments.length || segments[segments.length - 1] !== districtMatch[1])) {
      segments.push(districtMatch[1]);
    }
    return segments;
  },
  handleGoHistory() {
    if (typeof tt !== "undefined" && tt.navigateTo) {
      tt.navigateTo({ url: "/pages/history/index" });
    }
  },
  validateForm() {
    const { birthDate, selectedCity } = this.data;
    if (!birthDate || !selectedCity) {
      showToast(messages.FORM_INCOMPLETE);
      return false;
    }
    if (selectedCity.length < 2) {
      showToast(messages.CITY_INVALID);
      return false;
    }
    if (!fortuneStore.canGenerateToday()) {
      showToast(messages.QUOTA_EXCEEDED);
      return false;
    }
    return true;
  },
  handleGenerate() {
    if (this.data.isSubmitting) {
      return;
    }
    if (!this.validateForm()) {
      return;
    }
    this.setData({ isSubmitting: true });
    showRewardedVideoAd()
      .then(() => this.requestFortune())
      .catch((error) => {
        if (error && error.code === "ad_not_completed") {
          showToast(messages.WATCH_AD_TO_CONTINUE);
        } else {
          showToast(messages.GENERATION_FAILED);
        }
        this.hideLoadingOverlay();
        this.setData({ isSubmitting: false });
      });
  },
  requestFortune() {
    const payload = {
      birthDate: this.data.birthDate,
      birthTime: this.data.birthTime || "",
      birthProvince: this.data.selectedProvince,
      birthCity: this.data.selectedCity,
      birthDistrict: this.data.selectedDistrict,
      birthRegion: Array.isArray(this.data.regionValue) ? this.data.regionValue.slice() : []
    };
    this.showLoadingOverlay();
    return analyzeFortune(payload)
      .then((response) => {
     
        if (!response) {
          showToast(messages.GENERATION_FAILED);
          return;
        }
        fortuneStore.setCurrentFortune(response);
        fortuneStore.incrementQuota();
        fortuneStore.appendHistory(
          {
            birthDate: payload.birthDate,
            birthTime: payload.birthTime,
            birthProvince: payload.birthProvince,
            birthCity: payload.birthCity,
            birthDistrict: payload.birthDistrict,
            birthRegion: payload.birthRegion
          },
          response
        );
        if (typeof tt !== "undefined" && tt.navigateTo) {
          tt.navigateTo({ url: "/pages/result/index" });
        }
      })
      .catch((error) => {
        console.log(error)
        const message = error && error.data && error.data.message;
        if (message === "CONTENT_RISK") {
          showToast(messages.CONTENT_RISK);
        } else if (message === "BIRTHDATE_INVALID") {
          showToast("出生日期格式异常，请重新选择");
        } else {
          showToast(messages.GENERATION_FAILED);
        }
      })
      .finally(() => {
        this.hideLoadingOverlay();
        this.setData({ isSubmitting: false });
      });
  },
  showLoadingOverlay() {
    const hint = LOADING_HINTS[Math.floor(Math.random() * LOADING_HINTS.length)];
    this.setData({
      isLoading: true,
      loadingMessage: hint
    });
  },
  hideLoadingOverlay() {
    if (!this.data.isLoading) {
      return;
    }
    this.setData({
      isLoading: false,
      loadingMessage: ""
    });
  }
});