const express = require('express');
const router = express.Router();
const fs = require('fs');
const path = require('path');
const process = require('child_process');
const projectsFile = path.join(__dirname, 'project')

const getDatetime = (fmt = "YYYY-mm-dd HH:MM", date) => {
    date = date || new Date();

    let ret;
    const opt = {
        "Y+": date.getFullYear().toString(),        // 年
        "m+": (date.getMonth() + 1).toString(),     // 月
        "d+": date.getDate().toString(),            // 日
        "H+": date.getHours().toString(),           // 时
        "M+": date.getMinutes().toString(),         // 分
        "S+": date.getSeconds().toString()          // 秒
        // 有其他格式化字符需求可以继续添加，必须转化成字符串
    };
    for (let k in opt) {
        ret = new RegExp("(" + k + ")").exec(fmt);
        if (ret) {
            fmt = fmt.replace(ret[1], (ret[1].length == 1) ? (opt[k]) : (opt[k].padStart(ret[1].length, "0")))
        }
    }
    ;
    return fmt;
}
router.get('/', function (req, res, next) {
    const data = fs.readFileSync(projectsFile + '/index.json');
    res.json(JSON.parse(data.toString()))
});
router.get('/history', (req, res, next) => {
    let {id, time} = req.query;

    const fileName = projectsFile + '/' + id + '/' + time + '.log';
    if (!fs.existsSync(fileName)) {
        res.json({code: 1, message: "日志不存在", fileName});
        return;
    }
    res.sendFile(fileName, {}, function (err) {
        if (err) {
            next(err);
        }
    });
});

// 读取编译记录
router.get('/:id', function (req, res, next) {
    const id = req.params.id;
    const file = projectsFile + '/' + id + '/index.json';

    if (!fs.existsSync(file)) {
        res.json({code: 1, message: "项目不存在"});
        return;
    }
    const data = fs.readFileSync(file);
    res.json(JSON.parse(data.toString()))
});
router.get('/shell/:id', (req, res) => {
    const path = projectsFile + '/' + req.params.id + '/build.sh';
    if (!fs.existsSync(path)) {
        res.send({code: 1, message: '脚本文件不存在'})
        return;
    }
    const shell = fs.readFileSync(path,{encoding:'utf-8'})
    res.send({code: 0, shell})
});
router.post('/shell/:id', (req, res) => {
    const path = projectsFile + '/' + req.params.id + '/build.sh';
    if (!fs.existsSync(path)) {
        res.send({code: 1, message: '脚本文件文件不存在'})
        return;
    }
    const shell = req.body.shell;
    fs.writeFileSync(path, shell,{encoding:"utf-8"})
    res.send({code: 0})
});

const writeExecLog = (id, status, running = false) => {
    const data = JSON.parse(fs.readFileSync(projectsFile + '/index.json'));
    data[id - 1].lastUpdate = getDatetime('YYYY-mm-dd HH:MM:SS');
    data[id - 1].lastStatus = status;
    data[id - 1].running = running;

    fs.writeFile(projectsFile + '/index.json', JSON.stringify(data), (err1) => {
        if (err1) {
            console.log('writeExecLog:write project file fail')
        }
    })
}

// 执行
router.all('/hook/:id', function (req, res, next) {
    const id = parseInt(req.params.id);
    const projects = JSON.parse(fs.readFileSync(projectsFile + '/index.json',{encoding:'utf-8'}));
    if (id < 1 || id > projects.length) {
        res.json({code: 1, message: "项目不存在(1)"});
        return;
    }
    if (projects[id - 1].running) {
        res.json({code: 3, message: "当前项目脚本正在运行中"});
        return;
    }

    const file = projectsFile + '/' + id + '/build.sh';
    if (!fs.existsSync(file)) {
        res.json({code: 1, message: "项目不存在(2)"});
        return;
    }
    res.json({code: 0, message: "开始执行脚本,请稍后查看运行结果"});

    // 历史记录
    fs.readFile(projectsFile + '/' + id + '/index.json', (err, data) => {
        if (err) {
            console.log('read project {', id, '} history failed', err)
            return;
        }
        const histories = JSON.parse(data.toString());
        const currentTime = getDatetime('YYYY-mm-dd HH:MM:SS'),timeNow = Date.now();
        // 开始执行脚本
        fs.open(projectsFile + '/' + id + '/' + timeNow + '.log', 'a', function (err, fd) {
            if (err) { // 操作日志失败了
                writeExecLog(id, 'fail');
                return;
            }
            writeExecLog(id, null, true); // 运行中
            let isFailed = -1;
            const workerProcess = process.spawn('sh', [file]);
            let startTime = Date.now(); // 记录开始时间
            workerProcess.stdout.on('data', (execData) => {
                let line = execData.toString().trim();
                console.log('out:', line);
                if (line == 'execute success') {
                    isFailed = 1;
                } else if (line == 'execute fail') {
                    isFailed = 0;
                }
                fs.writeSync(fd, line); // 写入日志
            });
            workerProcess.stderr.on('data', (execData) => {
                console.log('err:', execData.toString())
                fs.writeSync(fd, execData.toString()); // 写入日志
                // isFailed = true;
            });
            workerProcess.on('close', function (code) {
                // 计算使用时间
                const useTime = Date.now() - startTime;
                let status = isFailed == -1 ? '未知' : (isFailed == 1 ? '成功' : '失败');
                histories.push({
                    time: currentTime,
                    timestamp:timeNow,
                    status,
                    useTime
                })
                // 写入记录
                fs.writeFileSync(projectsFile + '/' + id + '/index.json', JSON.stringify(histories));
                writeExecLog(id, status)
                fs.close(fd, function (err) {
                    if (err) {
                        console.log('close file error', err);
                    }
                });
            });
        });

    });


});
//创建项目
router.post('/create', (req, res, next) => {
    const data = JSON.parse(fs.readFileSync(projectsFile + '/index.json'));
    let id = data.length + 1;

    let {name, shell} = req.body;
    if (!name || !shell) {
        res.json({code: 1, message: "参数不能为空"})
        return;
    }
    fs.mkdirSync(projectsFile + '/' + id); // 创建项目目录
    // 创建记录文件
    fs.writeFile(projectsFile + '/' + id + '/index.json', '[]', function (err) {
        fs.writeFile(projectsFile + '/' + id + '/build.sh', shell, (err1) => {
            if (err1) {
                console.log('create shell success')
            }
        });
        if (err) {
            res.json({code: 2, message: "创建项目失败"})
        }
        data.push({
            id,
            name,
            create: getDatetime(),
            lastUpdate: null,
            lastStatus: "",
            running: false
        })
        fs.writeFile(projectsFile + '/index.json', JSON.stringify(data), (err1) => {
            if (err1) {
                console.log('create project fail')
            }
        })
        res.json(data);
    });
});


module.exports = router;