const app = getApp();
import $ from "../../utils/request";

/**
 * 根据生日计算年龄
 * @param {string} birthday 生日字符串，如 "1990-05-20"
 * @returns {number|null} 年龄，无法计算时返回 null
 */
function calcAge(birthday) {
    if (!birthday) return null;
    let birthDate = new Date(birthday.replace(/-/g, '/'));
    if (isNaN(birthDate.getTime())) return null;
    let today = new Date();
    let age = today.getFullYear() - birthDate.getFullYear();
    let monthDiff = today.getMonth() - birthDate.getMonth();
    // 未过生日则减一岁
    if (monthDiff < 0 || (monthDiff === 0 && today.getDate() < birthDate.getDate())) {
        age--;
    }
    return age;
}

Component({
    data: {
        BLUE_STATE: {},
        device: null,
        connectState: "",
        userList: [],
    },

    // 存储回调函数的引用，以便在 detached 时取消监听
    _connectStateWatcher: null,

    lifetimes: {
        attached() {
            console.log(`[Component] connectState 获取: ${app.globalData.ppScale.device.connectState}`);
            this.setData({
                BLUE_STATE: app.globalData.ppScale.plugin.BLUE_STATE,
                connectState: app.globalData.ppScale.device.connectState,
                device: app.globalData.ppScale.device.connection
            })
            this._connectStateWatcher = (newValue, oldValue) => {
                console.log(`[Component] connectState 变化: ${oldValue} -> ${newValue}`);
                this.setData({
                    connectState: newValue || ''
                });
            };
            app.watch('ppScale.device.connectState', this._connectStateWatcher);

            this.fetchUserList();
        },
        detached() {
            // 4. 在组件销毁时取消监听，防止内存泄漏
            if (this._connectStateWatcher) {
                app.unwatch('ppScale.device.connectState', this._connectStateWatcher);
            }
        }
    },
  
    // 组件的方法
    methods: {
        // 长按型号区域初始化设备
        onDeviceLongPress() {
            wx.showModal({
                title: "提示",
                content: "确定要初始化设备吗？将清除设备中的所有数据（用户信息、历史数据、配网数据、设置信息）。",
                success: (res) => {
                    if (res.confirm) {
                        wx.showLoading({ title: "正在初始化设备...", mask: true });
                        app.globalData.ppScale.activeProtocol.codeClearDeviceData("00", (status) => {
                            wx.hideLoading();
                            if (status == 0) {
                                wx.showToast({ title: "设备初始化成功", icon: "success" });
                                // 断开蓝牙连接并返回上一页
                                app.globalData.ppScale.plugin.Blue.stop();
                                setTimeout(() => {
                                    wx.navigateBack({ delta: 1 });
                                }, 1500);
                            } else {
                                wx.showToast({ title: "设备初始化失败，请重试", icon: "none" });
                            }
                        });
                    }
                }
            });
        },

        // 手动重连设备
        connectedDevice() {
            app.resetReconnectCount();
            this.triggerEvent('connectedDeviceEvent', {
                device: this.data.device
            });
        },

        addUser() {
            if (this.data.userList.length >= 10) {
                wx.showToast({ title: "超过最大用户数", icon: "none" });
                return;
            }
			this.selectComponent("#configureDevice2AddUser").showModal();
        },

		getAddUserInfo() {
			this.fetchUserList();
		},

        // 获取设备绑定的用户列表
        fetchUserList() {
            let sn = app.globalData.ppScale.device.mac.replace(/:/g, '');
            $.ajax("weighingScale/v2/select/user", { sn }, "GET", true, "正在获取用户列表...").then(res => {
                if (res.result && res.result.length) {
                    let list = res.result.map(user => {
                        // 没有 age 时通过 birthday 计算
                        if (!user.age && user.birthday) {
                            user.age = calcAge(user.birthday);
                        }
                        return user;
                    });
                    this.setData({ userList: list });
                } else {
                    this.setData({ userList: [] });
                }
            }).catch(() => {
                wx.showToast({
                    title: "用户列表获取失败",
                    icon: "none"
                })
            })
        },

        // 删除用户
        delUserClick(e) {
            let id = e.currentTarget.dataset.id;
            wx.showModal({
                title: "提示",
                content: "确定要删除该用户吗？",
                success: (res) => {
                    if (res.confirm) {
                        $.ajax("weighingScale/v2/del/user", { id }, "DELETE", true, "正在删除...", "application/x-www-form-urlencoded").then(() => {
                            wx.showToast({
                                title: "删除成功",
                                icon: "success"
                            })
                            setTimeout(() => {
                                this.fetchUserList();
                            }, 1500)
                        }).catch(() => {
                            wx.showToast({
                                title: "删除失败，请重试",
                                icon: "none"
                            })
                        })
                    }
                }
            })
        },

        setUserInfo() {
            if (this.data.connectState != this.data.BLUE_STATE.CONNECTSUCCESS && this.data.connectState != this.data.BLUE_STATE.WIFISUCCESS) {
                wx.showToast({
                    title: "设备连接失败，请重试。",
                    icon: "none"
                })
                return;
            }

            let userList = this.data.userList;
            if (!userList.length) {
                wx.showToast({
                    title: "暂无用户信息，请先添加用户",
                    icon: "none"
                })
                return;
            }

            // 获取设备端已有用户，与用户列表做双向同步
            wx.showLoading({ title: "正在同步用户信息...", mask: true });
            app.globalData.ppScale.activeProtocol.dataFetchUserID((deviceUserIds) => {
                console.log("设备端已有用户ID列表", deviceUserIds);
                let rawList = Array.isArray(deviceUserIds) ? deviceUserIds : [];
                // 兼容对象数组和纯ID数组，统一转为字符串比对
                let deviceIds = rawList.map(item => ({
                    userID: item.userID,
                    memberID: item.memberID
                }));
                let localIds = userList.map(user => user.id);
                
                // 秤有、列表没有 → 需要从秤删除
                let needDeleteList = deviceIds.filter(d => !localIds.includes(d.userID));
				
                // 秤没有、列表有 → 需要下发到秤
                let needSyncList = userList.filter(user => !deviceIds.some(d => d.userID == user.id));
                
                console.log("需删除", needDeleteList, "需下发", needSyncList);

                // 无需操作时直接完成
                if (!needDeleteList.length && !needSyncList.length) {
                    wx.hideLoading();
                    wx.showToast({ title: "用户信息已同步", icon: "success" });
                    setTimeout(() => {
                        this.triggerEvent('deviceEvent', { status: true });
                    }, 1500);
                    return;
                }

                // 第一步：逐个下发新用户到秤
                let syncIndex = 0;
                const syncNext = () => {
                    if (syncIndex >= needSyncList.length) {
                        // 下发完成，开始删除
                        if (needDeleteList.length) {
                            wx.showLoading({ title: "正在删除多余用户...", mask: true });
                        }
                        deleteNext();
                        return;
                    }
                    wx.showLoading({ title: "正在下发第" + (syncIndex + 1) + "/" + needSyncList.length + "个用户...", mask: true });
                    let user = needSyncList[syncIndex];
                    app.globalData.ppScale.activeProtocol.dataSyncUserInfo({
                        userID: user.id,
                        userName: user.realname,
                        memberID: "",
                        age: user.age || '',
                        gender: user.sex === 2 ? 0 : user.sex,
                        height: String(user.height || ''),
                        isAthleteMode: 0,
                        deviceHeaderIndex: syncIndex,
                        currentWeight: String(user.weight || ''),
                        targetWeight: "",
                        idealWeight: "",
                        recentData: [],
                    }, (res) => {
                        if (res == 0) {
                            syncIndex++;
                            syncNext();
                        } else {
                            wx.hideLoading();
                            console.log("dataSyncUserInfo 失败", res);
                            wx.showToast({ title: "用户信息下发失败，请重试。", icon: "none" });
                        }
                    });
                };

                // 第二步：逐个删除秤端多余用户
                let delIndex = 0;
                const deleteNext = () => {
                    if (delIndex >= needDeleteList.length) {
                        // 全部完成
                        wx.hideLoading();
                        wx.showToast({ title: "用户信息同步成功", icon: "success" });
                        setTimeout(() => {
                            this.triggerEvent('deviceEvent', { status: true });
                        }, 1500);
                        return;
                    }
                    wx.showLoading({ title: "正在删除第" + (delIndex + 1) + "/" + needDeleteList.length + "个多余用户...", mask: true });
                    let item = needDeleteList[delIndex];
                    app.globalData.ppScale.activeProtocol.dataDeleteUser({
                        userID: item.userID,
                        memberID: ""
                    }, (status) => {
                        if (status == 0) {
                            delIndex++;
                            deleteNext();
                        } else {
                            wx.hideLoading();
                            console.log("dataDeleteUser 失败", status);
                            wx.showToast({ title: "删除设备用户失败，请重试。", icon: "none" });
                        }
                    });
                };

                // 从下发开始执行
                syncNext();
            });
        },
    }
});