'use strict'
      
    process.setMaxListeners(0);
      
    const fs = require('fs'),
        path = require('path'),
        exec = require('child_process').exec,
        inquirer = require('inquirer'),
        captureWebsite = require('capture-website'),
        resemble = require('resemblejs'),
        file = [
            path.join(__dirname, 'pc/before'),
            path.join(__dirname, 'pc/after'),
            path.join(__dirname, 'm/before'),
            path.join(__dirname, 'm/after')
        ],
        before = fs.readFileSync(path.join(__dirname, 'dist/before/index.html'), 'utf8'),
        after = fs.readFileSync(path.join(__dirname, 'dist/after/index.html'), 'utf8');
      
    // make folders
    file.map(f => fs.mkdirSync(f, {recursive: true}))
      
    // before index.html 과 after index.html 파일에서 리스트를 추출하여 beforeList, afterList 변수에 저장
    let beforeList = before.match(/[src]*\/*html\/(.*?)\.html/g),
        afterList = after.match(/[src]*\/*html\/(.*?)\.html/g),
        beforeItems = [],
        afterItems = [];
      
    // beforeItems 배열과 afterItems 배열에 로컬서버 주소를 각각 저장
    for (let i = 0; i < beforeList.length; i++) {
        if (!Array.isArray(beforeItems[i])) beforeItems[i] = [];
        beforeItems[i] = [`http://localhost:8000/dist/before/${beforeList[i]}`, path.basename(beforeList[i])]
    }
    for (let i = 0; i < afterList.length; i++) {
        if (!Array.isArray(beforeItems[i])) afterItems[i] = [];
        afterItems[i] = [`http://localhost:8000/dist/after/${afterList[i]}`, path.basename(afterList[i])]
    }
      
    // screenshot compare function
    const compare = () => {
        const num = beforeList.length > afterList.length ? afterList.length : beforeList.length,
            res = ['pc', 'm'];
        let compareRes = [];
        return new Promise(resolve => {
            res.map(a => {
                for (let i = 0; i < num; i++) {
                    resemble(path.join(__dirname, `${a}/before/${path.basename(beforeList[i])}.png`))
                        .compareTo(path.join(__dirname, `${a}/after/${path.basename(afterList[i])}.png`))
                        .onComplete(function (data) {
                            let diff = JSON.stringify(data.diffBounds)
                            if (data.misMatchPercentage !== '0.00') {
                                compareRes.push(`${a} - ${beforeList[i]} : ${afterList[i]} = ${data.misMatchPercentage}, ${diff}`);
                            }
                        });
                }
            })
            resolve(compareRes.join('\n'));
        })
    }
      
    // Setting screenshot options and 실행
    function setting() {
        // screeshot options
        let mobileOpts = {
            fullPage: true,
            delay: 5,
            // emulateDevice: 'iPhone X',
            // width: mobileWidth,
        };
        let pcOpts = {
            fullPage: true,
            delay: 5,
            // width: pcWidth,
        };
      
        const questions = [{
                type: 'input',
                name: 'PCBrowserWidth',
                message: 'pc browser width:'
            },
                {
                    type: 'list',
                    choices: [ 'true', new inquirer.Separator(), 'false' ],
                    name: 'iphoneX',
                    message: 'Mobile device iphone X?'
                },
            ],
            mOpt = {
                type: 'input',
                name: 'mobileBrowserWidth',
                message: 'mobile browser width'
            }
        inquirer.prompt(questions).then(function (answers) {
            const answerData = JSON.stringify(answers);
            const answerDataJson = JSON.parse(answerData);
            pcOpts.width = Number(answerDataJson.PCBrowserWidth);
            mobileOpts.emulateDevice = answerDataJson.iphoneX === 'true' ? 'iPhone X' : '';
            return answerDataJson;
        }).then(function (data) {
            if (data.iphoneX === 'false') inquirer.prompt(mOpt).then(function (answers) {
                mobileOpts.width = Number(answers.mobileBrowserWidth);
            });
        }).then(function () {
            // server 실행
            exec('http-server -a localhost -p 8000');
      
            // screenshot and compare
            (async () => {
                await Promise.all(beforeItems.map(([url, filename]) => {
                    return captureWebsite.file(url, path.join(__dirname, `pc/before/${filename}.png`), pcOpts);
                }));
                await Promise.all(afterItems.map(([url, filename]) => {
                    return captureWebsite.file(url, path.join(__dirname, `pc/after/${filename}.png`), pcOpts);
                }));
                await Promise.all(beforeItems.map(([url, filename]) => {
                    return captureWebsite.file(url, path.join(__dirname, `m/before/${filename}.png`), mobileOpts);
                }));
                await Promise.all(afterItems.map(([url, filename]) => {
                    return captureWebsite.file(url, path.join(__dirname, `m/after/${filename}.png`), mobileOpts);
                }));
                const com = await compare();
                console.log(com);
                process.exit();
            })();
        });
    }
      
    setting();