import json

from escpos import printer


class Item:
    def __init__(self, text, icon):
        self.text = text
        self.icon = icon

    def print(self, conn):
        conn.text(f"{self.text}\n")
        # TODO: conn.image(self.icon)
        conn.cut()


def connect(conn_cfg):
    if "file" in conn_cfg:
        return printer.File(conn_cfg["file"])
    elif "vendor" in conn_cfg and "product" in conn_cfg:
        return printer.Usb(conn_cfg["vendor"], conn_cfg["product"])
    elif "host" in conn_cfg and "port" in conn_cfg:
        return printer.Network(conn_cfg["host"], conn_cfg["port"])
    else:
        return printer.Dummy()


def load_items(items_cfg):
    return [Item(c['text'], c['img']) for c in items_cfg]


def main():
    with open("config.json") as fh:
        cfg = json.load(fh)

    items = load_items(cfg['items'])
    conn = connect(cfg["connection"])

    for i in items:
        i.print(conn)

    print(conn.output.decode('UTF-8'))


if __name__ == "__main__":
    main()