const { Controller } = require('egg');

const sha256 = require("crypto-js/sha256");

const CryptoJS = require("crypto-js");

const XLSX = require('xlsx');

const fs = require('fs');

const KEY = CryptoJS.enc.Utf8.parse('BDQH');

class BaseController extends Controller {
    shaForm = (body, salt) => {
        return sha256(sha256(body).toString() + salt).toString();
    }

    encryptRequest = (body) => {
        return CryptoJS.AES.encrypt(body, KEY, {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7
        }).toString();
    }

    decryptRequest = (body) => {
        return CryptoJS.AES.decrypt(body, KEY, {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7
        }).toString(CryptoJS.enc.Utf8);
    }

    // 用户uid生成函数
    generateNumberString = (side) => {
        // 获取当前日期（年月日）
        const now = new Date();
        const year = String(now.getFullYear()).padStart(4, '0');
        const month = String(now.getMonth() + 1).padStart(2, '0'); // 月份从0开始，所以加1
        const date = String(now.getDate()).padStart(2, '0');
        const dateString = year + month + date;

        // 获取当前时间戳的后三位
        const timestamp = String(Date.now()).slice(-3);

        // 生成三位随机数字
        const randomDigits = Math.floor(Math.random() * 100).toString().padStart(3, '0');

        // 组合成最终的15位字符串
        const fullNumberString = dateString + timestamp + randomDigits + side;

        return fullNumberString;
    }

    // 随机盐生成函数
    generateRandomString = () => {
        const lowerCaseLetters = 'abcdefghijklmnopqrstuvwxyz';
        const upperCaseLetters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        const numbers = '0123456789';

        let result = '';

        // 生成5位随机小写字母
        for (let i = 0; i < 5; i++) {
            const randomIndex = Math.floor(Math.random() * lowerCaseLetters.length);
            result += lowerCaseLetters[randomIndex];
        }

        // 生成5位随机大写字母
        for (let i = 0; i < 5; i++) {
            const randomIndex = Math.floor(Math.random() * upperCaseLetters.length);
            result += upperCaseLetters[randomIndex];
        }

        // 生成2位随机数字
        for (let i = 0; i < 2; i++) {
            const randomIndex = Math.floor(Math.random() * numbers.length);
            result += numbers[randomIndex];
        }

        // 打乱整个字符串
        const characters = result.split('');
        for (let i = characters.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            [characters[i], characters[j]] = [characters[j], characters[i]];
        }

        return characters.join('');
    }

    // 随机生成12位客户端id
    generateClientId = () => {
        const numbers = '0123456789';

        let result = '';

        // 生成4位随机数字
        for (let i = 0; i < 4; i++) {
            const randomIndex = Math.floor(Math.random() * numbers.length);
            result += numbers[randomIndex];
        }

        // 打乱整个字符串
        const characters = result.split('');
        for (let i = characters.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            [characters[i], characters[j]] = [characters[j], characters[i]];
        }

        // 获取当前日期（年月日）
        const now = new Date();
        const year = String(now.getFullYear()).padStart(4, '0');
        const month = String(now.getMonth() + 1).padStart(2, '0'); // 月份从0开始，所以加1
        const date = String(now.getDate()).padStart(2, '0');
        const dateString = year + month + date;

        const fullNumberString = dateString + characters.join('');

        return fullNumberString;
    }

    checkUid = async (ctx) => {
        const token = ctx.request.header.authorization;
        const redis = ctx.app.redis;
        const insiders = await redis.get('db2').get(token);
        return insiders ? insiders : false;
    };

    setResponse = (ctx, code, msg, model, data = {}) => {
        const modelType = {
          "none": { code, msg },
          "deconstruction": { code, msg, ...data },
          "polymerization": { code, msg, data }
        }
        ctx.body = modelType[model];
    }

    downloadData = (form, data, dataHeaders) => {
        let extensionName = ['.xlsx', '.xls', '.csv'], buf;
        const { sheetName, fileName, extensionType } = form;
        if (extensionName[extensionType] == '.xlsx' || extensionName[extensionType] == '.xls') {
            // 使用xlsx库将数据转换为工作表和工作簿
            const ws = XLSX.utils.json_to_sheet(data);
            // 动态设置表头
            dataHeaders.forEach((header, index) => {
                const cellRef = XLSX.utils.encode_cell({ r: 0, c: index }); // 生成单元格引用，如A1, B1等
                ws[cellRef] = { v: header, t: "s" }; // 设置单元格的值和类型
            });
            // 创建一个新的工作簿并添加工作表
            const wb = XLSX.utils.book_new();
            // 将工作表添加到工作簿中，并指定其名称
            XLSX.utils.book_append_sheet(wb, ws, sheetName);
            if (extensionName[extensionType] == '.xlsx') {
                // 将工作簿写入字符串（二进制）
                buf = XLSX.write(wb, { bookType: 'xlsx', type: 'array' });
            } else if (extensionName[extensionType] == '.xls') {
                // 将工作簿写入字符串（二进制）
                buf = XLSX.write(wb, { bookType: 'xls', type: 'array' });
            }
        } else if (extensionName[extensionType] == '.csv') {
            // 将数据转换为CSV格式的字符串
            buf = data.map(row => row.join(',')).join('\n') + '\n';
        }
        // 将文件的内容返回给控制器作为响应体发送给客户端
        if (buf) {
            const completeName = fileName + extensionName[extensionType];
            const filePath = 'app/public/' + completeName;
            // const filePath = '/disk/a/Download/' + completeName;
            return { filePath, completeName, buf };
        };
        return false;
    };
}

module.exports = BaseController;