let path = require('path');
const fs = require('fs');
const child_process = require('child_process');
const chalk = require('chalk');

let distPath = path.normalize(__dirname + '/../dist/');
let srcPath = path.normalize(__dirname + '/../src/');
let headerPath = path.normalize(
    __dirname + '/../../esp3d/src/modules/http/embedded.h'
);

console.log(chalk.yellow('Converting bin to text file'));
//Cleaning files
if (fs.existsSync(distPath + 'out.tmp')) fs.rmSync(distPath + 'out.tmp');
if (fs.existsSync(distPath + 'embedded.h')) fs.rmSync(distPath + 'embedded.h');

const data = new Uint8Array(
    fs.readFileSync(distPath + 'index.html.gz', { flag: 'r' })
);
console.log('data size is ', data.length);
let out = '#define tool_html_gz_size  ' + data.length + '\n';
out += 'const unsigned char tool_html_gz[' + data.length + '] PROGMEM = {\n   ';
let nb = 0;
data.forEach((byte, index) => {
    out +=
        ' 0x' + (byte.toString(16).length == 1 ? '0' : '') + byte.toString(16);
    if (index < data.length - 1) out += ',';
    if (nb == 15) {
        out += '\n   ';
        nb = 0;
    } else {
        nb++;
    }
});

out += '\n};\n';
fs.writeFileSync(distPath + 'out.tmp', out);

//Check conversion
if (fs.existsSync(distPath + 'out.tmp')) {
    console.log(chalk.green('[ok]'));
} else {
    console.log(chalk.red('[error]Conversion failed'));
    return;
}

//Format header file
console.log(chalk.yellow('Building header'));
fs.writeFileSync(
    distPath + 'embedded.h',
    fs.readFileSync(srcPath + 'header.txt')
);
let bin2cfile = fs.readFileSync(distPath + 'out.tmp').toString();
fs.appendFileSync(distPath + 'embedded.h', bin2cfile);
fs.appendFileSync(
    distPath + 'embedded.h',
    fs.readFileSync(srcPath + 'footer.txt')
);

//Check format result
if (fs.existsSync(distPath + 'embedded.h')) {
    console.log(chalk.green('[ok]'));
} else {
    console.log(chalk.red('[error]Conversion failed'));
    return;
}

//Move file to src
console.log(chalk.yellow('Overwriting header in sources'));
fs.writeFileSync(headerPath, fs.readFileSync(distPath + 'embedded.h'));
if (fs.existsSync(headerPath)) {
    console.log(chalk.green('[ok]'));
} else {
    console.log(chalk.red('[error]Overwriting failed'));
    return;
}