const fs = require('fs');

async function send_message(client, to, message) {
    let res;

    await client
    .sendText(to, message)
    .then((result) => {
        console.log('success sending message');
        res = {result: result, code: 200};
    })
    .catch((erro) => { 
        console.error('error while sending message')
        res = {result: erro, code: 500};
    });

    return res
}

async function send_image(client, to, base64_image, name, caption = '') {
    let res

    await client
    .sendImageFromBase64(to, base64_image, name, caption)
    .then((result) => {
        console.log('success sending image');
        res = {result: result, code: 200};
    })
    .catch((erro) => {
        console.error('error while sending image');
        res = {result: erro, code: 500};
    });

    return res;
}

async function get_all_chats(client) {
    let res;
    
    await client
    .getAllChats()
    .then((result) => {
        res = {result: result, code: 200};
    })
    .catch((erro) => {
        res = {result: erro, code: 500};
    });

    return res;
}

function base64ToFile(base64, filePath) {
    // Remove the Base64 prefix if it exists
    const base64Data = base64.replace(/^data:image\/\w+;base64,/, '');

    // Decode the Base64 string
    const binaryData = Buffer.from(base64Data, 'base64');

    // Write the binary data to a file
    fs.writeFile(filePath, binaryData, (err) => {
        if (err) {
            console.error('Error writing file:', err);
            return false
        } else {
            console.log('File saved successfully:', filePath);
            return true
        }
    });
}

module.exports = { send_message, send_image, get_all_chats, base64ToFile }