/**
 * 婚恋状态页 U25（重构：用 userStore + matchStore + DangerActionDialog）
 *
 * 状态：searching / paused / getting_to_know / matched_successfully / service_exited
 * 操作：暂停寻找 / 恢复寻找 / 设置正在了解 / 解除匹配
 *
 * 不变量（AGENTS.md）：
 *   - 第 6 条：成功牵手必须双确认——matched_successfully 不能通过本页直接设置，
 *     仅由 /matches/{id}/success/request + confirm 双确认流程触发；本页只做状态展示与暂停/恢复/解除。
 *   - 第 4 条：解除匹配后双方会话立即停用——unmatch 走 matchStore.unmatchConversation 同步 MessageStore。
 *   - 第 9 条：PostgreSQL 是 Source of Truth——状态以 userStore.fetchRelationshipStatus 服务端返回为准。
 */
const { userStore, appStore, unmatchConversation } = require('../../stores');
const { RELATIONSHIP_STATUS, DANGER_ACTION } = require('../../constants');

const STATUS_META = {
  [RELATIONSHIP_STATUS.SEARCHING]: {
    label: '正在寻找',
    desc: '你正在被推荐给合适的对象，也会收到新的喜欢提示。',
    kind: 'success',
  },
  [RELATIONSHIP_STATUS.PAUSED]: {
    label: '已暂停寻找',
    desc: '你暂时不会被推荐给他人，也无法收到新的喜欢提示。已有聊天仍可继续使用。',
    kind: 'warning',
  },
  [RELATIONSHIP_STATUS.GETTING_TO_KNOW]: {
    label: '正在了解',
    desc: '你正在与某位对象互相了解中，平台会适当减少新推荐，让你专注这段关系。',
    kind: 'info',
  },
  [RELATIONSHIP_STATUS.MATCHED_SUCCESSFULLY]: {
    label: '已成功牵手',
    desc: '恭喜！你与对方已成功牵手，平台将不再为你推荐其他人。如有需要可联系公益红娘。',
    kind: 'success',
  },
  [RELATIONSHIP_STATUS.SERVICE_EXITED]: {
    label: '已退出婚恋服务',
    desc: '你已退出婚恋服务，不再出现在推荐和搜索结果中。历史匹配与聊天记录已保留。',
    kind: 'disabled',
  },
};

Page({
  data: {
    status: RELATIONSHIP_STATUS.SEARCHING,
    statusLabel: '',
    statusDesc: '',
    statusKind: 'success',
    matchingWith: null,
    recommendationEnabled: true,
    loading: false,
    actionLoading: false,

    // DangerActionDialog
    showDangerDialog: false,
    dangerAction: DANGER_ACTION.PAUSE,
    dangerTargetName: '',

    statusBarHeight: 20,
    navBarHeight: 44,
  },

  onLoad() {
    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 */ }

    this._unsub = userStore.bindToPage(this, {
      userState: 'userState',
    });
    this.loadStatus();
  },

  onUnload() {
    if (this._unsub) this._unsub();
  },

  onShow() {
    this.loadStatus();
  },

  async loadStatus() {
    if (this.data.loading) return;
    this.setData({ loading: true });
    try {
      const result = await userStore.fetchRelationshipStatus();
      this._applyStatus(result.status, result.matchingWith, result.recommendationEnabled);
    } catch (err) {
      // 兜底：用 userState 缓存渲染
      const us = userStore.state.userState || {};
      this._applyStatus(us.relationshipStatus || RELATIONSHIP_STATUS.SEARCHING, us.matchingWith || null, us.recommendationEnabled ?? true);
      appStore.toastError(err);
    } finally {
      this.setData({ loading: false });
    }
  },

  _applyStatus(status, matchingWith, recommendationEnabled) {
    const meta = STATUS_META[status] || STATUS_META[RELATIONSHIP_STATUS.SEARCHING];
    this.setData({
      status,
      statusLabel: meta.label,
      statusDesc: meta.desc,
      statusKind: meta.kind,
      matchingWith: matchingWith || null,
      recommendationEnabled: recommendationEnabled ?? true,
    });
  },

  // ============ 操作（先弹 DangerActionDialog 二次确认） ============

  onPause() {
    this.setData({
      showDangerDialog: true,
      dangerAction: DANGER_ACTION.PAUSE,
      dangerTargetName: '',
    });
  },

  onResume() {
    // 恢复寻找为正向操作，直接执行
    this._doAction(async () => {
      await userStore.resumeSearching();
      appStore.toastSuccess('已恢复寻找');
      this.loadStatus();
    });
  },

  onSetGettingToKnow() {
    this.setData({
      showDangerDialog: true,
      dangerAction: DANGER_ACTION.PAUSE, // 复用"暂停类"确认样式（非 danger）
      dangerTargetName: '',
    });
    this._pendingGtk = true;
  },

  onUnmatch() {
    const m = this.data.matchingWith;
    if (!m || !m.matchId) return;
    this.setData({
      showDangerDialog: true,
      dangerAction: DANGER_ACTION.UNMATCH,
      dangerTargetName: m.displayName || '对方',
    });
  },

  /** DangerActionDialog 确认回调 */
  async onDangerConfirm() {
    this.setData({ showDangerDialog: false });
    const action = this.data.dangerAction;
    if (this._pendingGtk) {
      this._pendingGtk = false;
      this._doAction(async () => {
        await userStore.markGettingToKnow();
        appStore.toastSuccess('已设置为正在了解');
        this.loadStatus();
      });
      return;
    }
    if (action === DANGER_ACTION.PAUSE) {
      this._doAction(async () => {
        await userStore.pauseSearching();
        appStore.toastSuccess('已暂停寻找');
        this.loadStatus();
      });
    } else if (action === DANGER_ACTION.UNMATCH) {
      const m = this.data.matchingWith;
      if (!m || !m.matchId) return;
      this._doAction(async () => {
        await unmatchConversation(m.matchId);
        this.setData({ matchingWith: null });
        appStore.toastSuccess('已解除匹配');
        this.loadStatus();
      });
    }
  },

  /** DangerActionDialog 取消回调 */
  onDangerCancel() {
    this.setData({ showDangerDialog: false });
    this._pendingGtk = false;
  },

  /** 统一执行带 loading 的动作（防重） */
  async _doAction(fn) {
    if (this.data.actionLoading) return;
    this.setData({ actionLoading: true });
    try {
      await fn();
    } catch (err) {
      appStore.toastError(err);
    } finally {
      this.setData({ actionLoading: false });
    }
  },

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