// pages/xiaoxi/xiaoxi.js
const app = getApp();
import { formatDate } from '../../static/lib/utils';
const { jianquanxian } = require('../../utils/imAuth/jianquanxian');
import { enrichGroupConversation, isOrderGroupConversation, sortConversations, recordConversationOpen } from '../../utils/group-chat.js';
import { loadGroupMetaCache } from '../../utils/im-user.js';

Page({
    data: {
        allConversations: [],
        filteredConversations: [],
        activeTab: 0,
        tabUnread: [0, 0, 0],
        displayCount: 4,
        searchKeyword: '',
        actionPopup: { visible: false, conversation: null },
        currentUser: null,
        notificationMuted: false,
        scrollHeight: 0
    },

    _permissionSeq: 0,

    onLoad() {
        this.calculateScrollHeight();
        const muted = wx.getStorageSync('notificationMuted') || false;
        this.setData({ notificationMuted: muted });
        loadGroupMetaCache(app);
        this._onGlobalConvUpdated = (result) => {
            const content = result?.content || result;
            if (content && content.conversations) {
                this.renderConversations(content);
            }
        };
        this._onUnreadChanged = (data) => {
            const unreadTotal = data?.unreadTotal ?? app.globalData.messageManager?.unreadTotal ?? 0;
            if (app.globalData.messageManager) {
                app.globalData.messageManager.unreadTotal = unreadTotal;
            }
            if (app.emitEvent) {
                app.emitEvent('tabBarBadgeChanged', {
                    badgeText: unreadTotal > 0 ? String(unreadTotal) : '',
                });
            }
            if (this.data.currentUser) {
                this.loadConversations();
            }
        };
        app.on('conversationsUpdated', this._onGlobalConvUpdated);
        app.on('unreadCountChanged', this._onUnreadChanged);
    },

    onUnload() {
        if (this._onGlobalConvUpdated) {
            app.off('conversationsUpdated', this._onGlobalConvUpdated);
        }
        if (this._onUnreadChanged) {
            app.off('unreadCountChanged', this._onUnreadChanged);
        }
        if (this.conversationsUpdatedListener && wx.goEasy?.im) {
            wx.goEasy.im.off(wx.GoEasy.IM_EVENT.CONVERSATIONS_UPDATED, this.conversationsUpdatedListener);
            this.conversationsUpdatedListener = null;
        }
    },

    onShow() {
        if (!this.checkLoginStatus()) return;
        loadGroupMetaCache(app);
        if (app.globalData.messageManager?.unreadTotal != null) {
            app.emitEvent('tabBarBadgeChanged', {
                badgeText: app.globalData.messageManager.unreadTotal > 0
                    ? String(app.globalData.messageManager.unreadTotal) : ''
            });
        }
        this.checkPermissionAndAutoConnect();
    },

    onHide() {},
    async checkPermissionAndAutoConnect() {
        const seq = ++this._permissionSeq;
        let quanxian;
        try {
            quanxian = await jianquanxian(app);
        } catch (e) {
            return;
        }
        if (seq !== this._permissionSeq) return;

        if (!quanxian.allowed) {
            const currentRole = app.globalData.currentRole || 'normal';
            let content = '您没有权限使用消息功能';
            if (currentRole === 'dashou') content = '您需要先充值会员才能使用消息功能';
            wx.showModal({
                title: '权限不足',
                content,
                showCancel: false,
                confirmText: '我知道了'
            });
            return;
        }
        this.autoConnect();
    },

    // ========== 登录状态检查 ==========
    checkLoginStatus() {
        const uid = wx.getStorageSync('uid');
        if (!uid) {
            wx.showToast({ title: '请先登录', icon: 'none' });
            setTimeout(() => { wx.redirectTo({ url: '/pages/wode/wode' }); }, 1500);
            return false;
        }
        let currentUser = app.globalData.currentUser;
        if (!currentUser) {
            currentUser = {
                id: uid,
                name: '用户' + uid.substring(0, 6),
                avatar: app.globalData.ossImageUrl + app.globalData.morentouxiang
            };
            app.globalData.currentUser = currentUser;
        }
        this.setData({ currentUser });
        return true;
    },

    // ========== 自动连接（复用全局连接，避免反复 disconnect） ==========
    autoConnect() {
        const role = app.globalData.currentRole || 'normal';
        const uid = wx.getStorageSync('uid');
        const prefixMap = { normal: 'Boss', dashou: 'Ds', shangjia: 'Sj', guanshi: 'Gs', zuzhang: 'Zz' };
        const targetUserId = (prefixMap[role] || 'Boss') + uid;

        const onReady = () => {
            this.setupConversationListener();
            this.loadConversations();
        };

        const status = wx.goEasy?.getConnectionStatus?.() || 'disconnected';
        const currentUserId = wx.goEasy?.im?.userId;

        if ((status === 'connected' || status === 'reconnected') && currentUserId === targetUserId) {
            onReady();
            return;
        }

        if (currentUserId && currentUserId !== targetUserId && app.disconnectGoEasy) {
            app.disconnectGoEasy().then(() => {
                app.connectWithIdentity(role, targetUserId, true).then(onReady).catch(() => {});
            });
            return;
        }

        if (!app.connectWithIdentity) {
            this.connectGoEasy(targetUserId);
            return;
        }

        app.connectWithIdentity(role, targetUserId, true).then(onReady).catch(() => {
            const s = wx.goEasy?.getConnectionStatus?.();
            if (s === 'connected' || s === 'reconnected') onReady();
        });
    },

    connectGoEasy(userId) {
        const { currentUser } = this.data;
        if (!currentUser) return;
        wx.goEasy.connect({
            id: userId,
            data: {
                name: currentUser.name,
                avatar: currentUser.avatar || (app.globalData.ossImageUrl + app.globalData.morentouxiang)
            },
            onSuccess: () => {
                try {
                    const connection = {
                        userId: userId,
                        identityType: app.globalData.currentRole,
                        lastConnectTime: Date.now(),
                        autoReconnect: true,
                        status: 'connected'
                    };
                    wx.setStorageSync('savedGoEasyConnection', JSON.stringify(connection));
                    wx.setStorageSync('goEasyUserId', userId);
                } catch (e) {}
                this.setupConversationListener();
                this.loadConversations();
            },
            onFailed: (error) => {
                if (error.code === 408) {
                    this.setupConversationListener();
                    this.loadConversations();
                } else {
                    wx.showToast({ title: '连接失败，请重试', icon: 'none' });
                }
            }
        });
    },

    // ========== 会话监听（永不清理） ==========
    setupConversationListener() {
        if (this.conversationsUpdatedListener) {
            wx.goEasy.im.off(wx.GoEasy.IM_EVENT.CONVERSATIONS_UPDATED, this.conversationsUpdatedListener);
        }
        this.conversationsUpdatedListener = (result) => {
            this.renderConversations(result);
        };
        wx.goEasy.im.on(wx.GoEasy.IM_EVENT.CONVERSATIONS_UPDATED, this.conversationsUpdatedListener);
    },

    loadConversations() {
        wx.goEasy.im.latestConversations({
            onSuccess: (result) => {
                this.renderConversations(result.content);
            },
            onFailed: () => {
                wx.showToast({ title: '获取会话失败', icon: 'none' });
            }
        });
    },

    // ========== 会话渲染与排序 ==========
    renderConversations(content) {
        if (!content || !content.conversations) {
            this.setData({ allConversations: [] }, () => this.applyFilter());
            return;
        }
        let list = content.conversations;
        const defaultAvatar = app.globalData.ossImageUrl + app.globalData.morentouxiang;
        const myGoEasyId = wx.goEasy?.im?.userId || '';
        const ossBase = app.globalData.ossImageUrl || '';
        const groupMeta = app.globalData.groupInfoMap || {};

        list.forEach(item => {
            if (item.type === 'group') {
                const meta = groupMeta[item.groupId];
                if (meta) {
                    if (!item.data) item.data = {};
                    Object.assign(item.data, meta);
                }
                if (item.data && item.data.dashouGoEasyId) {
                    if (!app.globalData.groupInfoMap) app.globalData.groupInfoMap = {};
                    app.globalData.groupInfoMap[item.groupId] = {
                        ...app.globalData.groupInfoMap[item.groupId],
                        ...item.data,
                    };
                }
                enrichGroupConversation(item, myGoEasyId, defaultAvatar, ossBase);
            } else if (item.data && item.data.avatar) {
                if (!item.data.avatar.startsWith('http')) {
                    item.data.avatar = ossBase + item.data.avatar;
                }
            } else if (item.data) {
                item.data.avatar = defaultAvatar;
            }
            if (item.lastMessage && item.lastMessage.timestamp) {
                item.lastMessage.date = formatDate(item.lastMessage.timestamp);
            }
        });

        const openTimes = wx.getStorageSync('conversationOpenTimes') || {};
        sortConversations(list, openTimes);

        const unreadTotal = content.unreadTotal !== undefined ? content.unreadTotal : list.reduce((sum, c) => sum + (c.unread || 0), 0);
        if (app.globalData.messageManager) {
            app.globalData.messageManager.unreadTotal = unreadTotal;
        }
        if (app && app.emitEvent) {
            app.emitEvent('tabBarBadgeChanged', { badgeText: unreadTotal > 0 ? String(unreadTotal) : '' });
            app.emitEvent('unreadCountChanged', { unreadTotal });
        }

        this.setData({ allConversations: list, displayCount: 4 }, () => {
            this.applyFilter();
        });

        // 群组订阅（不重复断开连接）
        this.subscribeGroupsIfNeeded(list);
    },

    /**
     * 群组订阅（依赖：GoEasy IM）
     * 根据官方文档，需要主动 subscribeGroup 才能接收群聊消息。
     * 为了应对切后台、网络波动等导致的订阅丢失，这里不再缓存订阅状态，
     * 每次获取到群组列表时都直接订阅，保证消息不丢失。
     */
    subscribeGroupsIfNeeded(conversations) {
        if (!wx.goEasy?.im || typeof wx.goEasy.im.subscribeGroup !== 'function') return;

        const groupIds = conversations
            .filter(c => c.type === 'group' && c.groupId)
            .map(c => c.groupId);

        if (groupIds.length === 0) return;

        // 不再判断缓存，直接订阅当前所有群组
        wx.goEasy.im.subscribeGroup({
            groupIds: groupIds,
            onSuccess: () => {
                // 可选的日志输出，不影响功能
                // console.log('群组订阅成功', groupIds);
            },
            onFailed: (error) => {
                console.error('群组订阅失败:', error);
            }
        });
    },

    applyFilter() {
        const { allConversations, activeTab, searchKeyword } = this.data;
        let filtered = [];
        if (activeTab === 0) {
            filtered = allConversations.filter(c => isOrderGroupConversation(c));
        } else if (activeTab === 1) {
            filtered = allConversations.filter(c => c.type === 'private');
        } else if (activeTab === 2) {
            filtered = allConversations.filter(c => c.type === 'cs');
        }

        if (searchKeyword.trim()) {
            const kw = searchKeyword.trim().toLowerCase();
            filtered = filtered.filter(c => {
                const name = (c.data && c.data.name || '').toLowerCase();
                const orderId = (c.data && c.data.orderId || '').toLowerCase();
                const id = (c.userId || c.groupId || '').toLowerCase();
                return name.includes(kw) || id.includes(kw) || orderId.includes(kw);
            });
        }

        const tabUnread = [0, 0, 0];
        allConversations.forEach(c => {
            if (isOrderGroupConversation(c)) tabUnread[0] += c.unread || 0;
            else if (c.type === 'private') tabUnread[1] += c.unread || 0;
            else if (c.type === 'cs') tabUnread[2] += c.unread || 0;
        });

        this.setData({ filteredConversations: filtered, tabUnread });
    },

    switchTab(e) {
        const index = parseInt(e.currentTarget.dataset.index);
        this.setData({ activeTab: index, displayCount: 4, searchKeyword: '' }, () => this.applyFilter());
    },

    onSearchInput(e) {
        this.setData({ searchKeyword: e.detail.value, displayCount: 4 }, () => this.applyFilter());
    },

    onScrollToLower() {
        const { displayCount, filteredConversations } = this.data;
        if (displayCount < filteredConversations.length) {
            this.setData({ displayCount: Math.min(displayCount + 4, filteredConversations.length) });
        }
    },

    onRefresh() {
        this.loadConversations();
    },

    chat(e) {
        const conversation = e.currentTarget.dataset.conversation;
        if (!conversation) return;
        recordConversationOpen(conversation);

        if (conversation.type === 'private') {
            const param = {
                toUserId: conversation.userId,
                toName: conversation.data.name,
                toAvatar: conversation.data.avatar
            };
            wx.navigateTo({ url: '/pages/liaotian/liaotian?data=' + encodeURIComponent(JSON.stringify(param)) });
        } else if (conversation.type === 'group') {
            const param = {
                groupId: conversation.groupId,
                orderId: conversation.data.orderId || '',
                groupName: conversation.data.name,
                groupAvatar: conversation.data.avatar,
                isCross: conversation.data.isCross || 0
            };
            wx.navigateTo({ url: '/pages/qunliaotian/qunliaotian?data=' + encodeURIComponent(JSON.stringify(param)) });
        } else if (conversation.type === 'cs') {
            const param = { teamId: conversation.teamId || conversation.id };
            wx.navigateTo({ url: '/pages/kefuliaotian/kefuliaotian?data=' + encodeURIComponent(JSON.stringify(param)) });
        }
    },

    chatKefu() {
        const param = { teamId: 'support_team' };
        wx.navigateTo({ url: '/pages/kefuliaotian/kefuliaotian?data=' + encodeURIComponent(JSON.stringify(param)) });
    },

    showAction(e) {
        const conversation = e.currentTarget.dataset.conversation;
        this.setData({ ['actionPopup.conversation']: conversation, ['actionPopup.visible']: true });
    },
    closeMask() {
        this.setData({ ['actionPopup.visible']: false });
    },
    topConversation() {
        let conversation = this.data.actionPopup.conversation;
        if (!conversation) return;
        const top = !conversation.top;
        wx.showLoading({ title: '处理中...' });
        if (conversation.type === 'private') {
            wx.goEasy.im.topPrivateConversation({
                userId: conversation.userId, top,
                onSuccess: () => {
                    wx.hideLoading(); this.loadConversations();
                    wx.showToast({ title: top ? '已置顶' : '已取消置顶' });
                },
                onFailed: () => { wx.hideLoading(); wx.showToast({ title: '操作失败', icon: 'none' }); }
            });
        } else {
            wx.goEasy.im.topGroupConversation({
                groupId: conversation.groupId, top,
                onSuccess: () => {
                    wx.hideLoading(); this.loadConversations();
                    wx.showToast({ title: top ? '已置顶' : '已取消置顶' });
                },
                onFailed: () => { wx.hideLoading(); wx.showToast({ title: '操作失败', icon: 'none' }); }
            });
        }
        this.closeMask();
    },
    removeConversation() {
        let conversation = this.data.actionPopup.conversation;
        if (!conversation) return;
        wx.showLoading({ title: '删除中...' });
        wx.goEasy.im.removeConversation({
            conversation: conversation,
            onSuccess: () => { wx.hideLoading(); this.loadConversations(); wx.showToast({ title: '已删除' }); },
            onFailed: () => { wx.hideLoading(); wx.showToast({ title: '删除失败', icon: 'none' }); }
        });
        this.closeMask();
    },

    toggleNotification() {
        const newMuted = !this.data.notificationMuted;
        this.setData({ notificationMuted: newMuted });
        wx.setStorageSync('notificationMuted', newMuted);
        wx.showToast({ title: newMuted ? '已静音' : '已开启通知', icon: 'none' });
    },

    calculateScrollHeight() {
        const systemInfo = wx.getSystemInfoSync();
        const windowHeight = systemInfo.windowHeight;
        const windowWidth = systemInfo.windowWidth;
        const rpxRatio = 750 / windowWidth;
        const headerHeight = 150 / rpxRatio;
        const tabBarHeight = 130 / rpxRatio;
        const safeAreaBottom = systemInfo.safeArea ? (windowHeight - systemInfo.safeArea.bottom) : 0;
        this.setData({ scrollHeight: windowHeight - headerHeight - tabBarHeight - safeAreaBottom });
    }
});