/**
 * @yux-storage.js
 * @author xboxyan
 * @email yanwenbin1991@live.com
 * Created: 20-11-10
 * Update: 21-03-13
 */
function guid() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
        return v.toString(16);
    });
}
class yuxDB {

    constructor() {
        this.ready();
    }

    ready() {
        return new Promise((resolve, reject) => {
            if (this.db) {
                resolve(this);
            } else {
                this.objectStoreName = 'dozs-store';
                const request = window.indexedDB.open('dozs-project', 1);
                request.onsuccess = (event) => {
                    this.db = event.target.result;
                    resolve(this);
                };
                request.onupgradeneeded = (event) => {
                    const db = event.target.result;
                    if (!db.objectStoreNames.contains(this.objectStoreName)) {
                        db.createObjectStore(this.objectStoreName);
                    }
                };
                request.onerror = (event) => {
                    reject(event);
                }
            }
        })
    }

    init(request, callback) {
        return new Promise((resolve, reject) => {
            const success = value => {
                if (callback && typeof callback === 'function') {
                    callback(false, value);
                }
                resolve(value);
            }
            const error = event => {
                if (callback && typeof callback === 'function') {
                    callback(event);
                }
                reject(event);
            }
            return this.ready().then(() => {
                request(success, error);
            }).catch(error)
        })
    }

    setItem(key, value, callback) {
        return this.init((success, error)=>{
            const request = this.db.transaction(this.objectStoreName, 'readwrite').objectStore(this.objectStoreName).put(value, key);
            request.onsuccess = () => success(value);
            request.onerror = error;
        }, callback)
    }

    getItem(key, callback) {
        return this.init((success, error)=>{
            const request = this.db.transaction(this.objectStoreName).objectStore(this.objectStoreName).get(key);
            request.onsuccess = () => success(request.result);
            request.onerror = error;
        }, callback)
    }

    removeItem(key, callback) {
        return this.init((success, error)=>{
            const request = this.db.transaction(this.objectStoreName, 'readwrite').objectStore(this.objectStoreName).delete(key);
            request.onsuccess = () => success(key);
            request.onerror = error;
        }, callback)
    }

    key(index, callback) {
        return this.init((success, error)=>{
            const request = this.db.transaction(this.objectStoreName).objectStore(this.objectStoreName).getAllKeys();
            request.onsuccess = () => success(request.result[index]);
            request.onerror = error;
        }, callback)
    }

    keys(callback) {
        return this.init((success, error)=>{
            const request = this.db.transaction(this.objectStoreName).objectStore(this.objectStoreName).getAllKeys();
            request.onsuccess = () => success(request.result);
            request.onerror = error;
        }, callback)
    }

    clear(callback) {
        return this.init((success, error)=>{
            const request = this.db.transaction(this.objectStoreName, 'readwrite').objectStore(this.objectStoreName).clear();
            request.onsuccess = () => success(null);
            request.onerror = error;
        }, callback)
    }
}

if (typeof module !== 'undefined' && typeof module.exports !== 'undefined') {
    module.exports = new yuxDB();
} else {
    window.yuxStorage = new yuxDB();
}
function gets(key) {
    yuxStorage.getItem(key).then(res => {
        console.log(key, '=>', res)
        // new LightTip().success(JSON.stringify(key)+': '+Object.prototype.toString.call(res)+ ' '+JSON.stringify(res));
    }).catch(err => {
        console.log(err)
        //new LightTip().error(JSON.stringify(err));
    })
}

function sets(key, value,fn) {
    yuxStorage.setItem(key, value,fn).then(res => {
        console.log(key, '设置完成')
        // new LightTip().success('设置完成');
    }).catch(err => {
        console.log(err)
        //  new LightTip().error(JSON.stringify(err));
    })
}

function removes(key) {
    yuxStorage.removeItem(key).then(res => {
        console.log(key, '已被移除')
        //new LightTip().success(JSON.stringify(key)+'已被移除');
    }).catch(err => {
        console.log(err)
        // new LightTip().error(JSON.stringify(err));
    })
}

function clearStorage() {
    yuxStorage.clear().then(res => {
        console.log('数据已清空')
        // new LightTip().success('数据已清空');
    }).catch(err => {
        console.log(err)
        // new LightTip().error(JSON.stringify(err));
    })
}

function key(index) {
    yuxStorage.key(index).then(res => {
        console.log(index, '=>', res)
        // new LightTip().success(`第${index}个键: `+JSON.stringify(res));
    })
}
function copyText(text) {
    var element = createElement(text);
    element.select();
    element.setSelectionRange(0, element.value.length);
    document.execCommand('copy');
    element.remove();
    alert("已复制到剪切板");
}

//创建临时的输入框元素
function createElement(text) {
    var isRTL = document.documentElement.getAttribute('dir') === 'rtl';
    var element = document.createElement('textarea');
    // 防止在ios中产生缩放效果
    element.style.fontSize = '12pt';
    // 重置盒模型
    element.style.border = '0';
    element.style.padding = '0';
    element.style.margin = '0';
    // 将元素移到屏幕外
    element.style.position = 'absolute';
    element.style[isRTL ? 'right' : 'left'] = '-9999px';
    // 移动元素到页面底部
    let yPosition = window.pageYOffset || document.documentElement.scrollTop;
    element.style.top = `${yPosition}px`;
    //设置元素只读
    element.setAttribute('readonly', '');
    element.value = text;
    document.body.appendChild(element);
    return element;
}