import * as serialport from 'serialport';

// interface ISerial {
//     moisture: number;
//     parser: serialport.ReadlineParser
// }

export default class Serial {
    private moisture0: number;
    private moisture1: number;

    public constructor(path = '/dev/ttyUSB0', baudRate = 9600, delimiter = '\n') {
        const port = new serialport.SerialPort({ path, baudRate });
        const readline = new serialport.ReadlineParser({ delimiter });
        const parser = port.pipe(readline);
        parser.on('data', line => {
            const data = JSON.parse(line)
            const moisture0 = parseInt(data['A0'], 10);
            const moisture1 = parseInt(data['A1'], 10);
            if (!isNaN(moisture0) && !isNaN(moisture1)) {
                this.moisture0 = moisture0;
                this.moisture1 = moisture1;
            }
            else {
                console.error("Error reading analog data")
            }
        });
        port.on('error', err => {
            console.error('Serial Error:', err.message);
        });
    }

    private scale = (value: number) => {
        const percent = (value / 1024) * 100;
        return Math.min(Math.max(percent, 0), 100); // Clamp to 0-100 just in case
    }

    public getMoisture() {
        return { moisture0: this.scale(this.moisture0), moisture1: this.scale(this.moisture1) };
    }






}