// 引入必要的微信小程序 API
// const wx = require('wx');

class bleManager {
    constructor() {
        this.hasPermission = false;
        this.isAvailable = false;
        // this.devices = [];
        this.connectedDeviceId = null;
        // this.services = [];
        this.serviceId = null;
        this.deviceId = null;
        this.characteristicId = null;
    }

    // 检查蓝牙权限
    async checkBluetoothPermission() {
        return new Promise((resolve, reject) => {
            // 获取蓝牙权限
            const _this = getApp();
            wx.getSetting({
                success(res) {
                    if (res.authSetting["scope.bluetooth"]) {
                        _this.globalData.scopeBluetooth = true;
                        resolve(true);

                    } else if (res.authSetting["scope.bluetooth"] === undefined) {
                        _this.globalData.scopeBluetooth = false;
                        wx.authorize({
                            scope: "scope.bluetooth",
                            complete() {
                                _this.getBluetoothStatus();
                            }
                        });
                        resolve(false);

                    } else {
                        _this.globalData.scopeBluetooth = false;

                        wx.showModal({
                            title: '请打开系统蓝牙进行配网',
                            content: '如已打开蓝牙仍然弹框，请尝试重启小程序',
                            success(res) {
                                if (res.confirm) {
                                    console.log('用户点击确定')
                                    wx.openSetting({
                                        complete() {
                                            // _this.getBluetoothStatus();
                                        }
                                    })
                                } else if (res.cancel) {
                                    console.log('用户点击取消')
                                }
                            }
                        })
                        resolve(false);
                    };
                }
            })
        })



    }

    // 初始化蓝牙适配器
    initBluetoothAdapter() {
        return new Promise((resolve, reject) => {
            wx.openBluetoothAdapter({
                success: (res) => {
                    this.isAvailable = true;
                    resolve(true);
                },
                fail: (err) => {
                    this.isAvailable = false;
                    reject(false);
                }
            });
        });
    }

    // 获取已连接的蓝牙设备
    getConnectedDevices() {
        return new Promise((resolve, reject) => {
            wx.getConnectedBluetoothDevices({
                services: ["ffc0", "ab00", "ffe5"],
                // services: ["0000ab00-0000-1000-8000-00805f9b34fb"
                //     , "0000ffc0-0000-1000-8000-00805f9b34fb"
                // ],
                success: (res) => {
                    // const connectedDevices = res.devices.map(device => ({
                    //     deviceId: device.deviceId,
                    //     name: device.name || device.localName
                    // }));
                    console.log('已连接的蓝牙设备:', res.devices);
                    resolve(res.devices);
                },
                fail: (err) => {
                    console.error('获取已连接的蓝牙设备失败:', err);
                    reject(new Error('获取已连接的蓝牙设备失败'));
                }
            });
        });
    }

    // 断开与指定设备的连接
    disconnect(deviceId) {
        return new Promise((resolve, reject) => {
            wx.closeBLEConnection({
                deviceId: deviceId,
                success: (res) => {
                    this.connectedDeviceId = null;
                    console.log('断开连接成功:', res);
                    resolve(res);
                },
                fail: (err) => {
                    console.error('断开连接失败:', err);
                    reject(new Error('断开连接失败'));
                }
            });
        });
    }

    // 发送数据到指定设备
    sendData(data) {
        return new Promise((resolve, reject) => {
            const buffer = new ArrayBuffer(data.length);
            const view = new Uint8Array(buffer);
            for (let i = 0; i < data.length; i++) {
                view[i] = data.charCodeAt(i);
            }

            wx.writeBLECharacteristicValue({
                deviceId: this.deviceId,
                serviceId: this.serviceId,
                characteristicId: this.characteristicId,
                value: buffer,
                success: (res) => {
                    console.log('数据发送成功:', res);
                    resolve(res);
                },
                fail: (err) => {
                    console.error('数据发送失败:', err);
                    reject(new Error('数据发送失败'));
                }
            });
        });
    }

    getSetting() {
        const _this = this;
        wx.getSetting({
            success(res) {
                if (res.authSetting["scope.userFuzzyLocation"]) {
                    // 成功
                    _this.getBluetoothStatus();

                } else if (res.authSetting["scope.userFuzzyLocation"] === undefined) {

                    wx.authorize({
                        scope: "scope.userFuzzyLocation",
                        success() {
                            _this.getSetting();
                        }
                    });
                } else {

                    wx.showModal({
                        title: '请打开系统位置获取',
                        success(res) {
                            if (res.confirm) {
                                console.log('用户点击确定')
                                wx.openSetting({
                                    complete() {
                                        // _this.getSetting();
                                    }
                                })
                            } else if (res.cancel) {
                                console.log('用户点击取消');
                            }
                        }
                    })
                }
            }
        })
    }
    // 开始搜索蓝牙设备
    startScan(success, fail) {
        wx.startBluetoothDevicesDiscovery({
            services: ["ffc0", "ab00", "ffe5"],
            success: (res) => {
                // this.onBluetoothDeviceFound();
                console.log('蓝牙设备搜索已启动:', res);
                if (success) {
                    success(res);
                }

                // resolve(res);
            },
            fail: (err) => {
                if (fail) {
                    fail(err);
                }
                console.log('启动蓝牙设备搜索失败', err ?? "err is null");

                // reject(new Error('启动蓝牙设备搜索失败', err ?? "err is null"));
            }
        });
        // return new Promise((resolve, reject) => {
        //     wx.startBluetoothDevicesDiscovery({
        //         services: ["ffc0", "ab00", "ffe5"],
        //         success: (res) => {
        //             // this.onBluetoothDeviceFound();
        //             console.log('蓝牙设备搜索已启动:', res);
        //             resolve(res);
        //         },
        //         fail: (err) => {
        //             reject(new Error('启动蓝牙设备搜索失败', err ?? "err is null"));
        //         }
        //     });
        // });
    }

    // 监听发现新设备的事件
    onBluetoothDeviceFound(callback) {
        wx.onBluetoothDeviceFound((res) => {
            const devices = res.devices.map(device => ({
                deviceId: device.deviceId,
                name: device.name || device.localName
            }));
            // this.devices.push(...devices);
            console.log('发现设备:', this.devices);
            if (callback) {
                callback(devices);
            }
        });
    }

    // 连接到指定设备
    connectToDevice(deviceId) {
        return new Promise((resolve, reject) => {
            wx.createBLEConnection({
                deviceId: deviceId,
                success: (res) => {
                    this.connectedDeviceId = deviceId;
                    console.log('连接成功:', res);
                    resolve(res);
                },
                fail: (err) => {
                    console.error('连接失败:', err);
                    reject(new Error('连接失败'));
                }
            });
        });
    }

    // 停止搜索
    stopScan() {
        return new Promise((resolve, reject) => {
            wx.stopBluetoothDevicesDiscovery({
                success: (res) => {
                    console.log('停止搜索成功:', res);
                    resolve(res);
                },
                fail: (err) => {
                    console.error('停止搜索失败:', err);
                    reject(new Error('停止搜索失败'));
                }
            });
        });
    }

    // 发现服务
    discoverServices(deviceId) {
        return new Promise((resolve, reject) => {
            wx.getBLEDeviceServices({
                deviceId: deviceId,
                success: (res) => {
                    this.services = res.services;
                    console.log('发现服务:', this.services);
                    resolve(res.services);
                },
                fail: (err) => {
                    console.error('发现服务失败:', err);
                    reject(new Error('发现服务失败'));
                }
            });
        });
    }

    // 发现特征值
    discoverCharacteristics(deviceId, serviceId) {
        return new Promise((resolve, reject) => {
            wx.getBLEDeviceCharacteristics({
                deviceId: deviceId,
                serviceId: serviceId,
                success: (res) => {
                    // this.characteristics[serviceId] = res.characteristics;
                    this.characteristicId = res.characteristics;
                    console.log('发现特征值:', this.characteristicId);
                    resolve(res.characteristics);
                },
                fail: (err) => {
                    console.error('发现特征值失败:', err);
                    reject(new Error('发现特征值失败'));
                }
            });
        });
    }

    // 读取特征值
    readCharacteristicValue(deviceId, serviceId, characteristicId) {
        return new Promise((resolve, reject) => {
            wx.readBLECharacteristicValue({
                deviceId: deviceId,
                serviceId: serviceId,
                characteristicId: characteristicId,
                success: (res) => {
                    console.log('读取特征值成功:', res);
                    resolve(res);
                },
                fail: (err) => {
                    console.error('读取特征值失败:', err);
                    reject(new Error('读取特征值失败'));
                }
            });
        });
    }

    // 监听特征值变化
    notifyCharacteristicValueChange(deviceId, serviceId, characteristicId, state, callback) {
        // return new Promise((resolve, reject) => {
        wx.notifyBLECharacteristicValueChange({
            deviceId: deviceId,
            serviceId: serviceId,
            characteristicId: characteristicId,
            state: state, // true 表示开启通知，false 表示关闭通知
            success: (res) => {
                console.log('通知特征值变化成功:', res);
                // resolve(res);
                if (callback) {
                    callback(res)
                }
            },
            fail: (err) => {
                console.error('通知特征值变化失败:', err);
                // reject(new Error('通知特征值变化失败'));
            }
        });
        // });
    }

    // 搜索蓝牙服务
    searchServices(deviceId) {
        return this.discoverServices(deviceId);
    }

    // 搜索蓝牙特征值
    searchCharacteristics(deviceId, serviceId) {
        return this.discoverCharacteristics(deviceId, serviceId);
    }
}

const ble = new bleManager();

// 导出 bleManager 类
module.exports = ble;