const path = require('path');
const fs = require('fs')
const csv = require('csv-parser')
const prompt = require('electron-prompt');
const createCsvWriter = require('csv-writer').createObjectCsvWriter;
const { app, BrowserWindow } = require('electron');
const { ipcMain } = require('electron')

function createWindow() {
    // 创建浏览器窗口
    let win = new BrowserWindow({
        width: 800,
        height: 600,
        webPreferences: {
            nodeIntegration: true,
            contextIsolation: true,
            preload: path.join(__dirname, 'preload.js')
        }
    })
    win.webContents.openDevTools() // 打开开发者工具
    // 加载index.html文件
    win.loadFile('index.html');
}

app.on('ready', createWindow);

ipcMain.on('parse-csv', (event, path) => {
    const results = []
    fs.createReadStream(path)
      .pipe(csv())
      .on('data', (data) => {
        results.push(data)
      })
      .on('end', () => {
        event.reply('csv-data', results)
      })
})

// 保存数据到csv文件
ipcMain.on('save2csv', (event, path, data) => {
    // 保存数据到路径中
    // 如果数据为空，直接返回
    if (data.length === 0) {
        return;
    }
    // 从第一个数据对象中提取字段名
    const headers = Object.keys(data[0]).map(key => ({id: key, title: key}));

    const csvWriter = createCsvWriter({
        path: path,
        header: headers
    });
    csvWriter.writeRecords(data).then(() => {
    });
})

ipcMain.on('get-file-list', (event, dirPaths) => {
    console.error('Will read directory: ', dirPaths);
    // 读取所有目录下面的文件
    var lstPaths = dirPaths.split(';');
    for (let i = 0; i < lstPaths.length; i++) {
        const dirPath = lstPaths[i];
        fs.readdir(dirPath, (err, files) => {
            if (err) {
                console.error('Error reading directory: ', err);
                event.reply('file-list-error', err);
            } else {
                event.reply('file-list-data', files, dirPath);
            }
        });
    }
});

ipcMain.on('open-newlv-prompt', (event, arg) => {
    prompt({
        title: 'Prompt',
        label: '请输入关卡id:',
        value: '',
        inputAttrs: {
            type: 'text'
        },
        type: 'input'
    })
    .then((r) => {
        if(r === null) {
            console.log('user cancelled');
        } else {
            console.log('result', r);
            event.reply('prompt-newlv-reply', r);
        }
    })
    .catch(console.error);
})

// 复制模板文件到指定的目录
ipcMain.on('copy-template', (event, templateFN) => {
    console.log('copy-template');
    prompt({
        title: '复制模板文件',
        label: '请输入新的模板文件路径和文件名:',
        value: '../../templates/tm_',
        inputAttrs: {
            type: 'text'
        },
        type: 'input'
    })
    .then((r) => {
        if(r === null) {
            event.reply('copy-template-replay', "");
        } else {
            // 将 templateFN 复制到指定的目录 r
            const { exec } = require('child_process');
            exec(`cp ${templateFN} ${r}`, (err, stdout, stderr) => {
                if (err) {
                    console.log('from', templateFN);
                    console.log('to', r);
                    console.log('result', err);
                    event.reply('copy-template-replay', "");
                    return;
                }
                event.reply('copy-template-replay', r);
            });
        }
    })
    .catch(console.error);
})

ipcMain.on('open-newinst-prompt', (event, arg) => {
    prompt({
        title: 'Prompt',
        label: '请输入实例id:',
        value: '',
        inputAttrs: {
            type: 'text'
        },
        type: 'input'
    })
    .then((r) => {
        if(r === null) {
            console.log('user cancelled');
        } else {
            console.log('result', r);
            event.reply('prompt-newinst-reply', r);
        }
    })
    .catch(console.error);
})

// 打开一个外部的应用
ipcMain.on('open-app', (event, dir, arg) => {
    const { exec } = require('child_process');
    const options = {
        cwd: __dirname + dir
    };
    exec(arg, (err, stdout, stderr) => {
        if (err) {
            console.error(err);
            return;
        }
        console.log(stdout);
    });
})

// 判断指定的文件是否存在
ipcMain.on('file-exists', (event, fn) => {

})