#  -*- coding: utf-8 -*-
""" Set of ESC/POS Commands (Constants)

This module contains constants that are described in the esc/pos-documentation.
Since there is no definitive and unified specification for all esc/pos-like printers the constants could later be
moved to `capabilities` as in `escpos-php by @mike42 <https://github.com/mike42/escpos-php>`_.

:author: `Manuel F Martinez <manpaz@bashlinux.com>`_ and others
:organization: Bashlinux and `python-escpos <https://github.com/python-escpos>`_
:copyright: Copyright (c) 2012-2017 Bashlinux and python-escpos
:license: MIT
"""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

import six

# Control characters
# as labelled in http://www.novopos.ch/client/EPSON/TM-T20/TM-T20_eng_qr.pdf
NUL = b'\x00'
EOT = b'\x04'
ENQ = b'\x05'
DLE = b'\x10'
DC4 = b'\x14'
CAN = b'\x18'
ESC = b'\x1b'
FS  = b'\x1c'
GS  = b'\x1d'

# Feed control sequences
CTL_LF = b'\n'              # Print and line feed
CTL_FF = b'\f'              # Form feed
CTL_CR = b'\r'              # Carriage return
CTL_HT = b'\t'              # Horizontal tab
CTL_SET_HT = ESC + b'\x44'  # Set horizontal tab positions
CTL_VT = b'\v'              # Vertical tab

# Printer hardware
HW_INIT   = ESC + b'@'             # Clear data in buffer and reset modes
HW_SELECT = ESC + b'=\x01'         # Printer select

HW_RESET  = ESC + b'\x3f\x0a\x00'   # Reset printer hardware
                                    # (TODO: Where is this specified?)

# Cash Drawer (ESC p <pin> <on time: 2*ms> <off time: 2*ms>)
_CASH_DRAWER = lambda m, t1='', t2='': ESC + b'p' + m + six.int2byte(t1) + six.int2byte(t2)
CD_KICK_DEC_SEQUENCE = lambda esc, p, m, t1=50, t2=50: six.int2byte(esc) + six.int2byte(p) + six.int2byte(m) + six.int2byte(t1) + six.int2byte(t2)
CD_KICK_2 = _CASH_DRAWER(b'\x00', 50, 50)  # Sends a pulse to pin 2 []
CD_KICK_5 = _CASH_DRAWER(b'\x01', 50, 50)  # Sends a pulse to pin 5 []

# Paper Cutter
_CUT_PAPER = lambda m: GS + b'V' + m
PAPER_FULL_CUT = _CUT_PAPER(b'\x00')  # Full cut paper
PAPER_PART_CUT = _CUT_PAPER(b'\x01')  # Partial cut paper

# Beep
BEEP = b'\x07'

# Panel buttons (e.g. the FEED button)
_PANEL_BUTTON = lambda n: ESC + b'c5' + six.int2byte(n)
PANEL_BUTTON_ON = _PANEL_BUTTON(0)  # enable all panel buttons
PANEL_BUTTON_OFF = _PANEL_BUTTON(1)  # disable all panel buttons

# Line display printing
LINE_DISPLAY_OPEN = ESC + b'\x3d\x02'
LINE_DISPLAY_CLEAR = ESC + b'\x40'
LINE_DISPLAY_CLOSE = ESC + b'\x3d\x01'

# Sheet modes
SHEET_SLIP_MODE = ESC + b'\x63\x30\x04'  # slip paper
SHEET_ROLL_MODE = ESC + b'\x63\x30\x01'  # paper roll

# Text format
# TODO: Acquire the "ESC/POS Application Programming Guide for Paper Roll
#       Printers" and tidy up this stuff too.
TXT_SIZE       = GS + b'!'

TXT_NORMAL     = ESC + b'!\x00'     # Normal text


TXT_STYLE = {
    'bold': {
        False: ESC + b'\x45\x00',               # Bold font OFF
        True: ESC + b'\x45\x01'                 # Bold font ON
    },
    'underline': {
        0: ESC + b'\x2d\x00',                   # Underline font OFF
        1: ESC + b'\x2d\x01',                   # Underline font 1-dot ON
        2: ESC + b'\x2d\x02'                    # Underline font 2-dot ON
    },
    'size': {
        'normal': TXT_NORMAL + ESC + b'!\x00',  # Normal text
        '2h': TXT_NORMAL + ESC + b'!\x10',      # Double height text
        '2w': TXT_NORMAL + ESC + b'!\x20',      # Double width text
        '2x': TXT_NORMAL + ESC + b'!\x30'       # Quad area text
    },
    'font': {
        'a': ESC + b'\x4d\x00',                 # Font type A
        'b': ESC + b'\x4d\x00'                  # Font type B
    },
    'align': {
        'left': ESC + b'\x61\x00',              # Left justification
        'center': ESC + b'\x61\x01',            # Centering
        'right': ESC + b'\x61\x02'              # Right justification
    },
    'invert': {
        True: GS  + b'\x42\x01',                # Inverse Printing ON
        False: GS  + b'\x42\x00'                # Inverse Printing OFF
    },
    'color': {
        'black': ESC + b'\x72\x00',             # Default Color
        'red': ESC + b'\x72\x01'                # Alternative Color, Usually Red
    },
    'flip': {
        True: ESC + b'\x7b\x01',                # Flip ON
        False: ESC + b'\x7b\x00'                # Flip OFF
    },
    'density': {
        0: GS + b'\x7c\x00',                    # Printing Density -50%
        1: GS + b'\x7c\x01',                    # Printing Density -37.5%
        2: GS + b'\x7c\x02',                    # Printing Density -25%
        3: GS + b'\x7c\x03',                    # Printing Density -12.5%
        4: GS + b'\x7c\x04',                    # Printing Density  0%
        5: GS + b'\x7c\x08',                    # Printing Density +50%
        6: GS + b'\x7c\x07',                    # Printing Density +37.5%
        7: GS + b'\x7c\x06',                    # Printing Density +25%
        8: GS + b'\x7c\x05'                     # Printing Density +12.5%
    },
    'smooth': {
        True: GS + b'\x62\x01',                 # Smooth ON
        False: GS + b'\x62\x00'                 # Smooth OFF
    },
    'height': {                                 # Custom text height
        1: 0x00,
        2: 0x01,
        3: 0x02,
        4: 0x03,
        5: 0x04,
        6: 0x05,
        7: 0x06,
        8: 0x07
    },
    'width': {                                  # Custom text width
        1: 0x00,
        2: 0x10,
        3: 0x20,
        4: 0x30,
        5: 0x40,
        6: 0x50,
        7: 0x60,
        8: 0x70
    }
}

# Fonts
SET_FONT = lambda n: ESC + b'\x4d' + n
TXT_FONT_A     = SET_FONT(b'\x00')  # Font type A
TXT_FONT_B     = SET_FONT(b'\x01')  # Font type B

# Spacing
LINESPACING_RESET = ESC + b'2'
LINESPACING_FUNCS = {
  60: ESC + b'A',  # line_spacing/60 of an inch, 0 <= line_spacing <= 85
  360: ESC + b'+', # line_spacing/360 of an inch, 0 <= line_spacing <= 255
  180: ESC + b'3', # line_spacing/180 of an inch, 0 <= line_spacing <= 255
}

# Prefix to change the codepage. You need to attach a byte to indicate
# the codepage to use. We use escpos-printer-db as the data source.
CODEPAGE_CHANGE = ESC + b'\x74'

# Barcode format
_SET_BARCODE_TXT_POS = lambda n: GS + b'H' + n
BARCODE_TXT_OFF = _SET_BARCODE_TXT_POS(b'\x00')  # HRI barcode chars OFF
BARCODE_TXT_ABV = _SET_BARCODE_TXT_POS(b'\x01')  # HRI barcode chars above
BARCODE_TXT_BLW = _SET_BARCODE_TXT_POS(b'\x02')  # HRI barcode chars below
BARCODE_TXT_BTH = _SET_BARCODE_TXT_POS(b'\x03')  # HRI both above and below

_SET_HRI_FONT = lambda n: GS + b'f' + n
BARCODE_FONT_A = _SET_HRI_FONT(b'\x00')  # Font type A for HRI barcode chars
BARCODE_FONT_B = _SET_HRI_FONT(b'\x01')  # Font type B for HRI barcode chars

BARCODE_HEIGHT = GS + b'h'  # Barcode Height [1-255]
BARCODE_WIDTH  = GS + b'w'  # Barcode Width  [2-6]

# NOTE: This isn't actually an ESC/POS command. It's the common prefix to the
#      two "print bar code" commands:
#      -  Type A: "GS k <type as integer> <data> NUL"
#      -  TYPE B: "GS k <type as letter> <data length> <data>"
#      The latter command supports more barcode types
_SET_BARCODE_TYPE = lambda m: GS + b'k' + six.int2byte(m)

# Barcodes for printing function type A
BARCODE_TYPE_A = {
    'UPC-A':   _SET_BARCODE_TYPE(0),
    'UPC-E':   _SET_BARCODE_TYPE(1),
    'EAN13':   _SET_BARCODE_TYPE(2),
    'EAN8':    _SET_BARCODE_TYPE(3),
    'CODE39':  _SET_BARCODE_TYPE(4),
    'ITF':     _SET_BARCODE_TYPE(5),
    'NW7':     _SET_BARCODE_TYPE(6),
    'CODABAR': _SET_BARCODE_TYPE(6),  # Same as NW7
}

# Barcodes for printing function type B
# The first 8 are the same barcodes as type A
BARCODE_TYPE_B = {
    'UPC-A':                       _SET_BARCODE_TYPE(65),
    'UPC-E':                       _SET_BARCODE_TYPE(66),
    'EAN13':                       _SET_BARCODE_TYPE(67),
    'EAN8':                        _SET_BARCODE_TYPE(68),
    'CODE39':                      _SET_BARCODE_TYPE(69),
    'ITF':                         _SET_BARCODE_TYPE(70),
    'NW7':                         _SET_BARCODE_TYPE(71),
    'CODABAR':                     _SET_BARCODE_TYPE(71),  # Same as NW7
    'CODE93':                      _SET_BARCODE_TYPE(72),
    'CODE128':                     _SET_BARCODE_TYPE(73),
    'GS1-128':                     _SET_BARCODE_TYPE(74),
    'GS1 DATABAR OMNIDIRECTIONAL': _SET_BARCODE_TYPE(75),
    'GS1 DATABAR TRUNCATED':       _SET_BARCODE_TYPE(76),
    'GS1 DATABAR LIMITED':         _SET_BARCODE_TYPE(77),
    'GS1 DATABAR EXPANDED':        _SET_BARCODE_TYPE(78),
}

BARCODE_TYPES = {
    'A': BARCODE_TYPE_A,
    'B': BARCODE_TYPE_B,
}

# QRCode error correction levels
QR_ECLEVEL_L = 0
QR_ECLEVEL_M = 1
QR_ECLEVEL_Q = 2
QR_ECLEVEL_H = 3

# QRcode models
QR_MODEL_1 = 1
QR_MODEL_2 = 2
QR_MICRO = 3

# Image format
# NOTE: _PRINT_RASTER_IMG is the obsolete ESC/POS "print raster bit image"
#       command. The constants include a fragment of the data's header.
_PRINT_RASTER_IMG = lambda data: GS + b'v0' + data
S_RASTER_N  = _PRINT_RASTER_IMG(b'\x00')  # Set raster image normal size
S_RASTER_2W = _PRINT_RASTER_IMG(b'\x01')  # Set raster image double width
S_RASTER_2H = _PRINT_RASTER_IMG(b'\x02')  # Set raster image double height
S_RASTER_Q  = _PRINT_RASTER_IMG(b'\x03')  # Set raster image quadruple