import win32print
import sys
import json
import os

def load_template(filename):
    script_dir = os.path.dirname(os.path.abspath(__file__))
    path = os.path.join(script_dir, filename)
    with open(path, "r", encoding="utf-8") as f:
        return f.read()

def money(n):
    return f"{int(float(n)):,}" if n is not None else "0"

def build_item_block(item, y_offset):
    name = item['name']
    price = money(item['price'])
    imei = item['imei']
    return f'''TEXT 20,{y_offset},"3",0,1,1,"{name}"
TEXT 20,{y_offset+30},"2",0,1,1,"{price} VND"
BARCODE 20,{y_offset+60},"128",50,1,0,2,2,"{imei}"'''

def print_barcode(tspl_content, printer_name="Xprinter XP-350BM"):
    h = win32print.OpenPrinter(printer_name)
    try:
        win32print.StartDocPrinter(h, 1, ("Print Barcode", None, "RAW"))
        win32print.StartPagePrinter(h)
        win32print.WritePrinter(h, tspl_content.encode('utf-8'))
        win32print.EndPagePrinter(h)
        win32print.EndDocPrinter(h)
    finally:
        win32print.ClosePrinter(h)

if __name__ == "__main__":
    data = json.loads(sys.argv[1])
    items = data['items']  # list of {name, price, imei}

    spacing = 180  # vertical gap between each stacked label, adjust if overlapping/too sparse
    blocks = []
    for i, item in enumerate(items):
        y_offset = 20 + (i * spacing)
        blocks.append(build_item_block(item, y_offset))

    items_block = "\n\n".join(blocks)

    template = load_template("barcode_template.txt")
    tspl = template.replace("{items_block}", items_block)

    print_barcode(tspl)
    print("Sent to printer.")