const { exec } = require('child_process');

const pins = [
    { key: 'igniter', board: 13, bcm: 27, mode: 'OUT' },
    { key: 'exhaust', board: 15, bcm: 22, mode: 'OUT' },
    { key: 'auger', board: 7, bcm: 4, mode: 'OUT' },
    { key: 'pof', board: 16, bcm: 23, mode: 'IN' },
    { key: 'vacuum', board: 22, bcm: 25, mode: 'IN' }
];

pins.forEach(pin => {
    console.log(`Key: ${pin.key}, Board: ${pin.board}, BCM: ${pin.bcm}, Mode: ${pin.mode}`);
});


module.exports = {
    // Function to toggle a pin on-then-off
    togglePin(pin, callback) {
        exec(`python3 src/python/gpio_interface.py toggle ${pin}`, (error, stdout, stderr) => {
            if (error) {
                return callback(error);
            }
            if (stderr) {
                return callback(new Error(stderr));
            }
            console.log(`Successfully toggled pin ${pin}`);
        });
    }.
    // Function to sense a pin state
    sensePin(pin, callback) {
        exec(`python3 src/python/gpio_interface.py sense ${pin}`, (error, stdout, stderr) => {
            if (error) {
                console.error(`Error sensing pin ${pin}: ${error.message}`);
                return callback(error);
            }
            if (stderr) {
                console.error(`Stderr while sensing pin ${pin}: ${stderr}`);
                return callback(new Error(stderr));
            }
            console.log(`Pin ${pin} state: ${stdout.trim()}`);
            callback(stdout.trim(), null);
        });
    },
    // Toggle pins sequentially and then sense pin states
    debugInit() {
        pins.forEach(async (pin) => {
            switch (pin.mode) {
                case 'OUT':
                    togglePin(pin.board, err => {
                        if (err) throw err;
                    });
                    // Wait 1000ms before toggling again.
                    setTimeout(togglePin(pin.board, err => {
                        if (err) throw err;
                    }), 1000);
                    break;
                case 'IN':
                    sensePin(pin.board, (state, err) => {
                        if (err) throw err;
                        console.log(`${pin.key} state: ${state}`);
                    });
                default:
                    break;
            }
        });
    }
}