# -*- coding: utf-8 -*-

import curses.ascii

import math

import logging

from tuikit.driver.driver import Driver

class CursesDriver(Driver):

    key_codes = (

        (0x09,                      'tab'           ),

        (0x0a,                      'enter'         ),

        (0x7f,                      'backspace'     ),

        (0x1b,                      'escape'        ),

    )

    # http://en.wikipedia.org/wiki/ANSI_escape_code

    csi_codes = (

        # code            param     key name

        (0x7e,              1,      'home'          ),  # linux

        (0x7e,              2,      'insert'        ),

        (0x7e,              3,      'delete'        ),

        (0x7e,              4,      'end'           ),  # linux

        (0x7e,              5,      'pageup'        ),

        (0x7e,              6,      'pagedown'      ),

        (0x7e,              15,     'f5'            ),

        (0x7e,              17,     'f6'            ),

        (0x7e,              18,     'f7'            ),

        (0x7e,              19,     'f8'            ),

        (0x7e,              20,     'f9'            ),

        (0x7e,              21,     'f10'           ),

        (0x7e,              23,     'f11'           ),

        (0x7e,              24,     'f12'           ),

        (0x41,              1,      'up'            ),

        (0x42,              1,      'down'          ),

        (0x43,              1,      'right'         ),

        (0x44,              1,      'left'          ),

        (0x46,              1,      'end'           ),  # xterm

        (0x48,              1,      'home'          ),  # xterm

    )

    color_map = {

    }

    attr_map = {

    }

    def __init__(self):

        Driver.__init__(self)

        self.log = logging.getLogger('tuikit')

        self.stdscr = None

        self.cursor = None

        self.colors = {}     # maps names to curses attributes

        self.colorpairs = {} # maps tuple (fg,bg) to curses color_pair

        self.colorstack = [] # pushcolor/popcolor puts or gets attributes from this

        self.inputqueue = []

        self.mbtnstack = []

        self._mouse_last_pos = (None, None)

        self._mouse_last_bstate = None

    ## initialization, finalization ##

    def init(self):

        """Initialize curses"""

        self.stdscr = curses.initscr()

        curses.start_color()

        curses.noecho()

        curses.cbreak()

        self.stdscr.keypad(0)

        self.stdscr.immedok(0)

        self.size.h, self.size.w = self.stdscr.getmaxyx()

        curses.curs_set(False)  # hide cursor

        curses.mousemask(curses.ALL_MOUSE_EVENTS | curses.REPORT_MOUSE_POSITION)

        curses.mouseinterval(0)  # do not wait to detect clicks, we use only press/release

    def close(self):

        self.stdscr.keypad(0)

        curses.echo()

        curses.nocbreak()

        curses.endwin()

    ## drawing ##

    def putch(self, x, y, c):

        if not self.clipstack.test(x, y):

            return

        try:

            if isinstance(c, str) and len(c) == 1:

                self.stdscr.addstr(y, x, c)

            else:

                self.stdscr.addch(y, x, c)

        except curses.error:

            pass

        if self.cursor:

            self.stdscr.move(*self.cursor)

            curses.curs_set(True)

        else:

            curses.curs_set(False)

        self.stdscr.refresh()

    ## cursor ##

    def showcursor(self, x, y):

        if self.clipstack.test(x, y):

            self.cursor = (y, x)

        else:

            self.cursor = None

    def hidecursor(self):

        curses.curs_set(False)

        self.cursor = None

        """Wait for curses input, add it to inputqueue.

        timeout -- int, tenths of second (None=infinite)

        """

        if timeout is None:

            # wait indefinitely

            c = self.stdscr.getch()

            self.inputqueue.insert(0, c)

        elif timeout > 0:

            # wait

            curses.halfdelay(timeout)

            c = self.stdscr.getch()

            curses.cbreak()

            if c == -1:

                return

            self.inputqueue.insert(0, c)

        # timeout = 0 -> no wait

        self.stdscr.nodelay(1)

        while True:

            c = self.stdscr.getch()

            if c == -1:

                break

            self.inputqueue.insert(0, c)

        self.stdscr.nodelay(0)

        c = None

        try:

            c = self.inputqueue.pop()

        except IndexError:

            pass

        return c

        c = None

        while c is None:

            try:

                c = self.inputqueue.pop()

            except IndexError:

                curses.napms(25)

        return c

        self.inputqueue.append(c)

        try:

            _id, x, y, _z, bstate = curses.getmouse()

        except curses.error:

            return []

        out = []

        if bstate & curses.REPORT_MOUSE_POSITION:

            if self._mouse_last_pos != (x, y):

                if self._mouse_last_pos[0] is not None:

                    relx = x - (self._mouse_last_pos[0] or 0)

                    rely = y - (self._mouse_last_pos[1] or 0)

                    out += [('mousemove', 0, x, y, relx, rely)]

                self._mouse_last_pos = (x, y)

        # we are interested only in changes, not buttons already pressed before event

        if self._mouse_last_bstate is not None:

            old = self._mouse_last_bstate

            new = bstate

            bstate = ~old & new

            self._mouse_last_bstate = new

        else:

            self._mouse_last_bstate = bstate

        if bstate & curses.BUTTON1_PRESSED:

            out += [('mousedown', 1, x, y)]

        if bstate & curses.BUTTON2_PRESSED:

            out += [('mousedown', 2, x, y)]

        if bstate & curses.BUTTON3_PRESSED:

            out += [('mousedown', 3, x, y)]

        if bstate & curses.BUTTON1_RELEASED:

            out += [('mouseup', 1, x, y)]

        if bstate & curses.BUTTON2_RELEASED:

            out += [('mouseup', 2, x, y)]

        if bstate & curses.BUTTON3_RELEASED:

            out += [('mouseup', 3, x, y)]

        # reset last pos when pressed/released

        if len(out) > 0 and out[-1][0] in ('mousedown', 'mouseup'):

            self._mouse_last_pos = (None, None)

        return out

        #FIXME read exact number of chars as defined by utf-8

        utf = []

        while len(utf) <= 6:

            utf.append(c)

            try:

                uni = str(bytes(utf), 'utf-8')

                return [('keypress', None, uni)]

            except UnicodeDecodeError:

                continue

        raise Exception('Invalid UTF-8 sequence: %r' % utf)

        codes = self.key_codes

        matchingcodes = []

        match = None

        consumed = []

        # consume next char, filter out matching codes

        consumed.append(c)

        while True:

            #self.log.debug('c=%s len=%s', c, len(codes))

            for code in codes:

                if c == code[len(consumed)-1]:

                    if len(code) - 1 == len(consumed):

                        match = code

                    else:

                        matchingcodes += [code]

            #self.log.debug('matching=%s', len(matchingcodes))

            # match found, or no matching code found -> stop

            if len(matchingcodes) == 0:

                break

            # match found and some sequencies still match -> continue

            if len(matchingcodes) > 0:

                if len(self.inputqueue) == 0:

            if c:

                consumed.append(c)

                codes = matchingcodes

                matchingcodes = []

            else:

                break

        keyname = None

        if match:

            # compare match to consumed, return unused chars

            l = len(match) - 1

            while len(consumed) > l:

                del consumed[-1]

            keyname = match[-1]

        if match is None:

            self.log.debug('Unknown control sequence: %s',

            return [('keypress', 'Unknown', None)]

        if keyname == 'mouse':

        if keyname == 'CSI':

        return [('keypress', keyname, None)]

        out = []

        if t in (0x20, 0x21, 0x22):

            # button press

            btn = t - 0x1f

            if not btn in self.mbtnstack:

                self.mbtnstack.append(btn)

                self._mouse_last_pos = (None, None)

                out += [('mousedown', btn, x, y)]

            else:

                # mouse move

                if self._mouse_last_pos != (x, y):

                    if self._mouse_last_pos[0] is not None:

                        relx = x - self._mouse_last_pos[0]

                        rely = y - self._mouse_last_pos[1]

                        out += [('mousemove', btn, x, y, relx, rely)]

                    self._mouse_last_pos = (x, y)

        elif t == 0x23:

            # button release

            btn = self.mbtnstack.pop()

            self._mouse_last_pos = (None, None)

            out += [('mouseup', btn, x, y)]

        elif t in (0x60, 0x61):

            # wheel up, down

            btn = 4 + t - 0x60

            out += [('mousewheel', btn, x, y)]

        else:

            raise Exception('Unknown mouse event: %x' % t)

        return out

        codes = self.csi_codes

        debug_seq = [0x1b, 0x5b]

        debug_seq.append(c)

        # numeric parameters?

        params = []

        if chr(c).isdigit():

            params.append(chr(c))

            while True:

                debug_seq.append(c)

                if chr(c).isdigit():

                    params[-1] += chr(c)

                elif chr(c) == ';':

                    params.append('')

                else:

                    break

        params = [int(x) for x in params]

        if len(params) == 0:

            params = [1]

        # filter codes using byte sequence

        while True:

            matching_codes = []

            for code in codes:

                if len(code) > 2 and code[0] == c:

                    matching_codes.append(code[1:])

            codes = matching_codes

            if len(codes) == 0:

                # no match -> unknown code

                seq = ','.join(['0x%x' % x for x in debug_seq])

                self.log.debug('Unknown control sequence: %s', seq)

                return [('keypress', 'Unknown:' + seq, None)]

            elif len(codes) == 1:

                # one match -> we got the winner

                break

            elif len(codes[0]) == 2:

                # more than one matching, but no more chars to check

                # will be sorted out using parameters

                break

            else:

                # more than one matching -> continue loop

                debug_seq.append(c)