"""
Greek code page probe — NETUM NT8330L (or any unknown printer)
Usage:  python print_codepage_probe.py <IP> [PORT]
Example: python print_codepage_probe.py 192.168.1.50 9100

Prints one long receipt that tries every candidate (n, encoding) combination.
Circle the block where you can read "ΚΑΛΗΜΕΡΑ ΕΛΛΑΔΑ" correctly.
That block tells you the codepage_n value to use in the printer profile.
"""
import sys
from escpos.printer import Network

IP   = sys.argv[1] if len(sys.argv) > 1 else "192.168.1.50"
PORT = int(sys.argv[2]) if len(sys.argv) > 2 else 9100

# (n_value, python_encoding, label)
# Each will be tested independently with a fresh ESC @ reset.
CANDIDATES = [
    # Standard Epson table assignments for Greek
    (14,  "cp737",     "n=14  CP737  (Epson standard slot)"),
    (38,  "cp737",     "n=38  CP737  (alt slot / CP869 area)"),
    (11,  "cp737",     "n=11  CP737  (CP851 slot)"),
    (47,  "cp737",     "n=47  CP737  (CP1253 slot, cp737 bytes)"),
    # Same slots but with cp869 encoding (different byte layout)
    (14,  "cp869",     "n=14  CP869  (Greek DOS #2)"),
    (38,  "cp869",     "n=38  CP869  (alt slot)"),
    # Windows / ISO encodings
    (47,  "cp1253",    "n=47  CP1253 (Windows Greek)"),
    (15,  "iso8859_7", "n=15  ISO-8859-7"),
    (14,  "iso8859_7", "n=14  ISO-8859-7"),
    # The Jolimark value, for reference
    (29,  "cp737",     "n=29  CP737  (Jolimark confirmed)"),
    # A few more obscure slots some Chinese-made printers use
    (16,  "cp737",     "n=16  CP737  (rare slot)"),
    (18,  "cp737",     "n=18  CP737  (rare slot)"),
    (21,  "cp737",     "n=21  CP737  (rare slot)"),
]

GREEK_SAMPLE = "ΚΑΛΗΜΕΡΑ ΕΛΛΑΔΑ"
GREEK_LOWER  = "καλημέρα ελλάδα"
GREEK_DIGITS = "ΤΙΜΗ: 12.50 ευρώ"

def probe(n: int, encoding: str, label: str):
    try:
        p = Network(IP, PORT, timeout=8)
        p._raw(b'\x1b\x40')              # ESC @ full reset
        p._raw(bytes([0x1b, 0x74, n]))    # ESC t n — select code page

        # Label in plain ASCII (always safe)
        p._raw(b'\x1b\x21\x00')           # normal size
        p._raw(f"[{label}]\n".encode('ascii', errors='replace'))

        # Greek sample in the candidate encoding
        try:
            greek_bytes = GREEK_SAMPLE.encode(encoding, errors='replace')
            lower_bytes = GREEK_LOWER.encode(encoding, errors='replace')
            digit_bytes = GREEK_DIGITS.encode(encoding, errors='replace')
        except LookupError:
            p._raw(b'  (encoding not available)\n')
            p._raw(b'\n')
            p.close()
            return

        p._raw(b'\x1b\x21\x08')           # bold
        p._raw(greek_bytes + b'\n')
        p._raw(b'\x1b\x21\x00')           # normal
        p._raw(lower_bytes + b'\n')
        p._raw(digit_bytes + b'\n')
        p._raw(b'\n')                      # spacer
        p.close()
        print(f"  OK  {label}")
    except Exception as e:
        print(f"  ERR {label}: {e}")

def main():
    print(f"Probing {IP}:{PORT}")
    print(f"Testing {len(CANDIDATES)} combinations...\n")

    # Print header block
    try:
        p = Network(IP, PORT, timeout=8)
        p._raw(b'\x1b\x40')
        p._raw(b'\x1b\x61\x01')           # center
        p._raw(b'\x1b\x21\x30')           # double width+height
        p._raw(b'GREEK PROBE\n')
        p._raw(b'\x1b\x21\x00')
        p._raw(b'\x1b\x61\x00')           # left
        p._raw(b'Circle the block with readable Greek.\n')
        p._raw(b'Looking for: KALIMERA ELLADA\n')
        p._raw(b'================================================\n')
        p._raw(b'\n')
        p.close()
    except Exception as e:
        print(f"Header failed: {e}")
        return

    for (n, enc, label) in CANDIDATES:
        probe(n, enc, label)

    # Footer + cut
    try:
        p = Network(IP, PORT, timeout=8)
        p._raw(b'\x1b\x40')
        p._raw(b'================================================\n')
        p._raw(b'END OF PROBE\n')
        p._raw(b'\n\n\n')
        p.cut()
        p.close()
        print("\nDone. Read the printout and note which block shows readable Greek.")
    except Exception as e:
        print(f"Footer failed: {e}")

if __name__ == "__main__":
    main()