import config
import numpy 

esc = '%s['%chr(27)
reset = '%s0m'%esc
cls = '%s2j'%esc

BLACK = 0
RED = 1
GREEN = 2
YELLOW = 3
BLUE = 4
MAGENTA = 5
CYAN = 6
WHITE = 7

FBRIGHT = 8
FBLINK = 16

rgcolorBg = range(8)
rgcolorFg = range(8)
rgcolorFg.extend([col | FBRIGHT for col in range(8)])

K_BACKSPACE = chr(8)
K_TAB = chr(9)
K_RETURN = chr(10)
K_DEL = chr(127)
K_LEFT = 256
K_RIGHT = 257
K_UP = 258
K_DOWN = 259
K_HOME = 260
K_END = 261
K_PGUP = 262
K_PGDN = 263

def StrKey(ch):
    if type(ch) == str:
        return ord(ch)
    return str(ch)

def Ctrl(ch):
    ch = ch.upper()
    assert ch != 'M' and ch != 'J' and ch != 'H'
    return chr(ord(ch - 'A' + 1))

def FEnter(key):
    return key == "\n" or key == "\r"

# ANSI Character - contains prop and character
class Ach(object):
    def __init__(self, ch, fgcol=WHITE, bgcol=BLACK):
        self.ch = ch
        self.fgCol = fgcol
        self.bgCol = bgcol
    def __eq__(self, ach):
        return type(ach) is Ach and self.ch == ach.ch and self.fgCol == ach.fgCol and self.bgCol == ach.bgCol
    def __ne__(self, ach):
        return not (self == ach)

def MkAch(ch, fgcol=WHITE, bgcol=BLACK):
    return Ach(ch, fgcol, bgcol)

def ChFromAch(ach):
    return ach.ch

achBlank = Ach(' ')
achInvd = Ach(chr(255), -1, -1)

def AstFromAch(ach, achPrev = None):
    ast = ach.ch
    rgsgr = []
    if (achPrev == None) or (achPrev.fgCol != ach.fgCol):
        rgsgr.append(str((ach.fgCol & 7) + 30))
        fBright = ach.fgCol & FBRIGHT
        if (achPrev == None) or (fBright != achPrev.fgCol & FBRIGHT):
            if fBright:
                rgsgr.append("1")
            else:
                rgsgr.append("2")
        fBlink = ach.fgCol & FBLINK
        if (achPrev == None) or (fBlink != achPrev.fgCol & FBLINK):
            if fBlink:
                rgsgr.append("5")
            else:
                rgsgr.append("25")
    if (achPrev == None) or (achPrev.bgCol != ach.bgCol):
        rgsgr.append(str(ach.bgCol + 40))
    if len(rgsgr) > 0:
        ast = esc + ";".join(rgsgr) + "m" + ast
    return ast

dtAch = numpy.dtype(object)

mpch_entity =  [0, 9786, 9787, 9829, 9830, 9827, 9824, 8226, 9688, 9675, 9689, 9794, 9792, 9834, 9835, 9788, 9658, 9668, 8597, 8252, 
                182, 167, 9644, 8616, 8593, 8595, 8594, 8592, 8735, 8596, 9650, 9660, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 
                44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 
                74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 
                103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126,
                8962, 199, 252, 233, 226, 228, 224, 229, 231, 234, 235, 232, 239, 238, 236, 196, 197, 201, 230, 198, 244, 246, 242, 251, 
                249, 255, 214, 220, 162, 163, 165, 8359, 402, 225, 237, 243, 250, 241, 209, 170, 186, 191, 8976, 172, 189, 188, 161, 171, 
                187, 9617, 9618, 9619, 9474, 9508, 9569, 9570, 9558, 9557, 9571, 9553, 9559, 9565, 9564, 9563, 9488, 9492, 9524, 9516, 
                9500, 9472, 9532, 9566, 9567, 9562, 9556, 9577, 9574, 9568, 9552, 9580, 9575, 9576, 9572, 9573, 9561, 9560, 9554, 9555, 
                9579, 9578, 9496, 9484, 9608, 9604, 9612, 9616, 9600, 945, 223, 915, 960, 931, 963, 181, 964, 934, 920, 937, 948, 8734, 
                966, 949, 8745, 8801, 177, 8805, 8804, 8992, 8993, 247, 8776, 176, 8729, 183, 8730, 8319, 178, 9632, 160]

setch_unsafe = set(['&', '<', '>', '"', "'"])
mpcol_hcol = ["#000000", "#AA0000", "#00AA00", "#AA5500", "#0000AA", "#AA00AA", "#00AAAA", "#AAAAAA",
              "#555555", "#FF5555", "#55FF55", "#FFFF55", "#5555FF", "#FF55FF", "#55FFFF", "#FFFFFF"]

def HstFromAch(ach, achPrev = None):
    stStyle = None
    if achPrev == None or achPrev.fgCol != ach.fgCol or achPrev.bgCol != ach.bgCol:
        stStyle = "color:" + mpcol_hcol[ach.fgCol & 15] + ";background-color:" + mpcol_hcol[ach.bgCol & 15]
    rgst = []
    if stStyle != None and achPrev != None:
        rgst.append("</span>")
    if stStyle != None:
        rgst.append("<span style='" + stStyle + "'>")
    ch = ord(ach.ch)
    entity = mpch_entity[ch]
    if entity == ch and not ach.ch in setch_unsafe:
        rgst.append(ach.ch)
    else:
        rgst.append("&#" + str(mpch_entity[ord(ach.ch)]) + ";")
    return ''.join(rgst)

class Pos(object):
    def __init__(self, w=config.W, h=config.H, x=1, y=1):
        self.w = w 
        self.h = h
        self.xz = x - 1
        self.yz = y - 1

    def X(self): return self.xz + 1
    def Y(self): return self.yz + 1

    def Inc(self):
        if self.xz == self.w - 1:
            if self.yz < self.h:
                self.xz = 0
                self.yz = self.yz + 1
        else:
            self.xz = self.xz + 1

    def Up(self):
        if self.yz > 0:
            self.yz = self.yz - 1
    def Down(self):
        if self.yz < self.h - 1:
            self.yz = self.yz + 1
    def Left(self):
        if self.xz > 0:
            self.xz = self.xz - 1
    def Right(self):
        if self.xz < self.w - 1:
            self.xz = self.xz + 1

# ANSI Screen
class Ascr(object):
    def __init__(self, w=config.W, h=config.H, achFill = None):
        self.mpyzxz_ach = numpy.empty((h,w), dtAch)
        self.mpyzxz_ach[:] = achFill
        self.w = w
        self.h = h

    def Zpos(self, xz, yz):
        return Pos(self.w, self.h, xz + 1, yz + 1)

    def W(self): return self.w
    def H(self): return self.h

    def PutAch(self, ach, x, y):
        if not (x < 1 or y < 1 or x > self.w or y > self.h): #clip
            self.mpyzxz_ach[y-1][x-1] = ach

    def GetAch(self, x, y):
        return self.mpyzxz_ach[y-1][x-1]

    def PutRgach(self, rgach, x, y):
        xz = x - 1
        if xz < self.w:
            if xz < 0:
                rgach = rgach[min(-xz, len(rgach)):]
                xz = 0
            if xz + len(rgach) >= self.w:
                rgach = rgach[:self.w - xz]
            self.mpyzxz_ach[y-1][xz:xz + len(rgach)] = rgach

    def PutSt(self, st, x, y, colFg = WHITE, colBg=BLACK):
        self.PutRgach([MkAch(ch, colFg, colBg) for ch in st], x, y)

    def Fill(self, ach, w, h, x = 1, y = 1):
        if x > self.w or y > self.h:
            return
        xz = max(x - 1, 0)
        yz = max(y - 1, 0)
        w = min(self.w - xz, w)
        h = min(self.h - yz, h)
        for yzT in range(yz, yz + h):
            self.mpyzxz_ach[yzT][xz:xz + w] = ach

    def PutAscr(self, ascr, x=1, y=1):
        for irow, rgachRow in enumerate(ascr.mpyzxz_ach):
            iachPut = -1
            for iach, ach in enumerate(rgachRow):
                if iachPut < 0 and ach != None:
                    iachPut = iach
                elif iachPut >= 0 and ach == None:
                    self.PutRgach(rgachRow[iachPut:iach], x + iachPut, y + irow)
                    iachPut = -1
            if iachPut >= 0:
                self.PutRgach(rgachRow[iachPut:], x + iachPut, y + irow)
                iachPut = -1

    def AstDiff(self, ascr):
        assert self.w == ascr.w and self.h == ascr.h
        rgast = []
        achPrev = None
        yz = 0
        for rgachRowOld, rgachRowNew in zip(self.mpyzxz_ach, ascr.mpyzxz_ach):
            xz = 0
            xzPred = -1
            for achOld, achNew in zip(rgachRowOld, rgachRowNew):
                if xz == self.w - 2:
                    achBeforeEOL = achNew
                if achOld != achNew:
                    achNew = achNew or achBlank
                    if xz == self.w - 1:
                        # Linewrap avoidance algorithm:
                        # when drawing the last character on a line, draw it in the space occupied by the character before.
                        rgast.append("%s%d;%dH" % (esc, yz + 1, xz))
                        rgast.append(AstFromAch(achNew, None))
                        # then, move the cursor back onto the character we just drew, and perform an insert.
                        rgast.append("%sD%s@" % (esc, esc))
                        # finally, draw the character before the last character in the line.
                        rgast.append(AstFromAch(achBeforeEOL or achBlank, achNew))
                    else:
                        if xz != xzPred:
                            xzPred = xz
                            rgast.append("%s%d;%dH" % (esc, yz + 1, xz + 1))
                            achPrev = None
                        rgast.append(AstFromAch(achNew, achPrev))
                    achPrev = achNew
                    xzPred = xzPred + 1
                xz = xz + 1
            yz = yz + 1
        return "".join(rgast)

    def Ast(self):
        return Ascr(self.w, self.h, achInvd).AstDiff(self) #stupid implementation

    def Hst(self):
        rgst = ["<pre>"]
        achPrev = None
        for rgachRow in self.mpyzxz_ach:
            for ach in rgachRow:
                rgst.append(HstFromAch(ach or achBlank, achPrev))
                achPrev = ach or achBlank
            rgst.append("<br>")
        rgst.append("</span></pre>")
        return ''.join(rgst)

def FKeyPrintable(key):
    return type(key) == str and (ord(key) >= 32 and ord(key) <= 126)