#!/usr/bin/env python

import cgi
import string
import sys
import re


# this defines an exception string in case our template file is messed up
badTemplateException = "There was a problem with the HTML template."
badFileException = "There was a problem opening the HTML template."

#Constants
VERSION = "0.2a"
DEBUG = 0
cssOrder = ["top","right","bottom","left"]

def pxInt(i):
    return str(i)+"px"

def cssDict(top,right,bottom,left):
    """ Create a dict with the four CSS values """
    d={}
    d["top"]=top
    d["right"]=right
    d["bottom"]=bottom
    d["left"]=left
    return d

class Grid:
    
    def __init__(self,width,margins,paddingDict,border,colorBg):
        """Initializes the Grid class, with general css parameters"""
        self.width = width-(paddingDict["left"]+paddingDict["right"])
            
        self.paddingDict = paddingDict
        self.margin = margins
        
        if border:
            self.border = border
        else:
            self.border = 'no'
            
        if colorBg:
            self.colorBg = colorBg
        else:
            self.colorBg = "#FFFFFF"
            
        self.comments = """ CSS file generated by Reticulator v"""+VERSION
        self.cellStyles = []

    def createCells(self,numberX,cellHeight,separateBy,colorFg):
        """Create cells and calculates all its position"""
        self.cellMargin = separateBy
        
        if colorFg:
            self.cellColorFg = colorFg
        else:
            self.cellColorFg = "#E0E0E0"

        if DEBUG>0: print "1.1"
        
        #The width and height of a cell come
        #by the total width and the number of cells, without the margin

	#Precise mode, with float precision
        #self.cellWidth = (self.width -((numberX-1)*self.cellMargin) )/ float(numberX)
	#####

	#Integer mode, no floats, precise, but width is not exactly the same as specified by the user
        self.cellWidth = self.width / numberX
	self.width = (self.cellWidth * numberX)-self.cellMargin
        self.cellWidth = self.cellWidth - (self.cellMargin)
	######
	
        if DEBUG>0: print "1.2"
        
        if cellHeight!=0:
            self.cellHeight = cellHeight            
        else:
            self.cellHeight = self.cellWidth
            
        if DEBUG>0: print "1.3"
        
        #Vertical position ##
        self.columns=[0]
	#Horizontal position ##
        self.upRows = [0]
	self.downRows = [self.cellMargin]
        for i in range(numberX-1):            
            newColumn = self.columns[-1]+(self.cellWidth+self.cellMargin)
            self.columns.append(newColumn)
     
	    #upRows
            newUpRow = self.upRows[-1]+(self.cellWidth+self.cellMargin)
            self.upRows.append(newUpRow)

            #downRows
            newDownRow = self.downRows[-1]+(self.cellWidth+self.cellMargin)
            self.downRows.append(newDownRow)

        #First was only use for reference, so we remove it
        self.upRows = self.upRows[1:]
	self.downRows = self.downRows[1:]
        
        #Margins for UpRow are negative
        self.upRows = map(lambda item:(-1)*item,self.upRows)

        if DEBUG>0: print "1.4"

    def addStyle(self, borderDict, border, bgcolor):
        style = {}
        style["width"] = self.cellWidth \
                         - borderDict["left"] - borderDict["right"]
        style["height"] = self.cellHeight \
                          - borderDict["top"] - borderDict["bottom"]
        style["widthLong"] = style["width"] \
                             + self.cellWidth + self.cellMargin
        style["heightLong"] = style["height"] \
                              + self.cellHeight + self.cellMargin
        style["bgcolor"] = str(bgcolor)
        style["border"] = str(border)
        style["borderDict"] = borderDict

        self.cellStyles.append(style)
        

    def generateCSS(self):
        content=""
##        try:
##            fp = file(filename,"w")
##        except:
##            print "Unable to open CSS file!"
##            sys.exit(0)
        if DEBUG>0: print "3.1"

        content+= "/*"+self.comments+"*/\n"
        content+= "html,p {\n"
        content+= "\tpadding: 0px ;\n"
        content+= "\tmargin: 0px ;\n"
        content+= "}\n\n"

        if DEBUG>0: print "3.2"
        content+= "/* Content is the main div. */\n"
        content+= "#content {\n"
        content+= "\twidth:"+pxInt(self.width)+";\n"        
        content+= "\tmargin:"+self.margin+";\n"
        if self.border!="no":
            content += "\tborder: "+self.border+";\n"
        content += "\tbackground-color:"+self.colorBg+";\n"

        temp=""
        for item in cssOrder:
            temp=temp+" "+pxInt(self.paddingDict[item])
        content+= "\tpadding:"+temp+";\n"
        
        content+= "}\n\n"

        content+= "/* subContent is a secondary main div. It has the cells background image, \n and allows to separate the cells and the main border */\n"
        content += "#subContent {\n "
        content+= "\twidth:"+pxInt(self.width)+";\n"                
	content += "\tpadding:0px; \n"
	content += "\tmargin:0px; \n"
	content += "\tbackground-color:#FbFbFb;\n"
	content += "\tbackground-image: url(/cgi-bin/bgimage.php?width="+str(self.cellWidth)+"&height="+str(self.cellHeight)+"&margin="+str(self.cellMargin)+"&colorBg="+self.colorBg[1:]+"&colorFg="+self.cellColorFg[1:]+");\n"
        #colorBg[1:] The PHP file gets hexadecimal color without the '#'
	content += "}\n\n"
        
        if DEBUG>0: print "3.3"

        content+= "/* The cell class is the main class to give a div cell properties. */\n"
        content+= ".cell {\n"
        content+= "\twidth:"+pxInt(self.cellWidth)+";\n"
        content+= "\theight:"+pxInt(self.cellHeight)+";\n"
        content+= "\tmargin-bottom:"+pxInt(self.cellMargin)+";\n"
        content+= "\toverflow: auto ;\n"
        content+= "\tbackground-color:gray;\n"
        content+= "}\n\n"

        if DEBUG>0: print "3.4"

        content+= "/* The last cell in your grid must have a #lastCell identifier. */\n"
        content+= "#lastCell {\n"
        content+= "\tmargin-bottom:"+pxInt(0)+";\n"
        content+= "}\n\n"

        if DEBUG>0: print "3.5"

        content+= ".cell p {\n"
        content+= "\tmargin-left:30px;\n"
        content+= "\tmargin-right:15px;\n"
        content+= "\tpadding-top:25px;\n"
        content+= "\tpadding-bottom:15px;\n"
        content+= "\tfont-size:small;\n"
        content+= "\tfont-family: Helvetica, Verdana, Arial, sans-serif;\n"
        content+= "}\n\n"

        if DEBUG>0: print "3.6"

        content+= "\n/*Relative grid vertical position */\n\n"
        content+= "/* Use these classes to position the cells in the column wanted. */\n"        
        cnt=1        
        for item in self.columns:            
            content+= ".column"+str(cnt)+" {\n"
            content+= "\tmargin-left:"+pxInt(item)+";\n"
            content+= "}\n"
            cnt+=1

        if DEBUG>0: print "3.7"

        content+= "\n/*Relative grid horizontal position */\n\n"
        content+= "/* Use the upXRows to move up the cells, along the rows.\n Use the downXRows to move down the cells, along the rows.*/\n"        
        cnt=1        
        for item in self.upRows:
            content+= ".up"+str(cnt)+"Rows {\n"
            content+= "\tmargin-top:"+pxInt(item)+";\n"
            content+= "}\n"
            cnt+=1

        cnt=1        
        for item in self.downRows:
            content+= ".down"+str(cnt)+"Rows {\n"
            content+= "\tmargin-top:"+pxInt(item)+";\n"
	    content+= "}\n"
            cnt+=1


	if len(self.cellStyles)>0: #there are some cell styles
            content+= "\n/*Cell styles */\n\n"
            content+= "/* Here are the classes for the styles defined. For each style you have a .cellStyleX class\n which is the style aplied to a normal cell\n and a cellStyleX_LongH and cellStyleX_LongV\n to use long cells. */\n"
            cnt=1
            for style in self.cellStyles:
                content+= ".cellStyle"+str(cnt)+" {\n"

                if style["bgcolor"]!="":
                    content+= "\tbackground-color:"+style["bgcolor"]+";\n"

                #If the style width is the same as the cell width,
                #we don't need to specify it again 
                if style["width"]!=self.cellWidth and style["width"]!=0:
                    content+= "\twidth:"+pxInt(style["width"])+";\n"

                #Same for height
                if style["height"]!=self.cellHeight and style["height"]!=0:
                    content+= "\theight:"+pxInt(style["height"])+ ";\n"

                #Borders
                for item in cssOrder:
                    if style["borderDict"][item]!=0:
                            content+= "\tborder-"+item+":"+\
                                      pxInt(style["borderDict"][item])+\
                                      " "+ style["border"]+";\n"

                content+= "}\n"

                #LongH ##########
                content+= ".cellStyle"+str(cnt)+"_LongH {\n"

                if style["bgcolor"]!="":
                    content+= "\tbackground-color:"+style["bgcolor"]+";\n"

                content+= "\twidth:"+pxInt(style["widthLong"])+";\n"

                if style["height"]!=self.cellHeight and style["height"]!=0:
                    content+= "\theight:"+pxInt(style["height"])+ ";\n"

                #Borders
                for item in cssOrder:
                    if style["borderDict"][item]!=0:
                            content+= "\tborder-"+item+":"+\
                                      pxInt(style["borderDict"][item])+\
                                      " "+ style["border"]+";\n"

                content+= "}\n"

                #LongV ##########
                content+= ".cellStyle"+str(cnt)+"_LongV {\n"

                if style["bgcolor"]!="":
                    content+= "\tbackground-color:"+style["bgcolor"]+";\n"

                if style["width"]!=self.cellWidth and style["width"]!=0:
                    content+= "\twidth:"+pxInt(style["width"])+";\n"

                content+= "\theight:"+pxInt(style["heightLong"])+ ";\n"

                #Borders
                for item in cssOrder:
                    if style["borderDict"][item]!=0:
                            content+= "\tborder-"+item+":"+\
                                      pxInt(style["borderDict"][item])+\
                                      " "+ style["border"]+";\n"

                content+= "}\n"

                cnt+=1
	content += "\n/* End of CSS generated by the Reticulator */\n"
        return content

    def displayWeb(self,output=sys.stdout,templateFile="template.html"):
        """Define a new function called Display.
        It takes one parameter, a html template
        to parses the generated grid"""
        if DEBUG>0: print "2.1"

        #Open the template file for read-only and read the entire
        #file as a string
        try:
            templateHandle = open(templateFile, "r")  
        except:
            raise badFileException

        templateInput = templateHandle.read()     
        templateHandle.close()                    
 
        if DEBUG>0: print "2.2 2.3"
 
        title=VERSION
        content=self.generateCSS()
        
	if DEBUG>0: print content        

        subResult = re.subn("<!--RETICULATOR-TITLE-->",  
            title,templateInput)
	    
        if DEBUG>0: print "2.4"
	
        if subResult[1] == 0:
            if DEBUG>0: print "2.41"
            raise badTemplateException
	    
        if DEBUG>0: print "2.5"
	
        subResult = re.subn("<!--RETICULATOR-CSS-->",  
            content,subResult[0])
        if subResult[1] == 0:
            if DEBUG>0: print "2.51"
            raise badTemplateException
	    
        if DEBUG>0: print "2.6"
	
        bgimage = "/cgi-bin/bgimage.php?width="+str(self.cellWidth)+"&amp;height="+str(self.cellHeight)+"&amp;margin="+str(self.cellMargin)+"&amp;colorBg="+self.colorBg[1:]+"&amp;colorFg="+self.cellColorFg[1:]

        subResult = re.subn("<!--RETICULATOR-BGIMAGE-->",
		bgimage,subResult[0])
        if subResult[1] == 0:
		if DEBUG>0: print "2.61"
		raise badTemplateException

	if DEBUG>0: print "2.7"
	
        print>>output, subResult[0]

def consoleStart():
    """Main function used for console mode.
    Neither webForm nor CGI support here, just for local tests.
    It generates an output.html file with the grid generated"""
    
    # Required header that tells the browser how to render the text.
    # print "Content-Type: text/html\n\n"

    if DEBUG>0: print "1"
    
    g = Grid(900,             
             "30px auto",cssDict(50,50,50,50),
             "1px solid gray","#FFFFFF")
    
    if DEBUG>0: print "2"
    
    g.createCells(4,
    		  4,
                  5,
                  "#E0E0E0")
    #content=g.generateCSS()
    if DEBUG>0: print "3"
    
    g.addStyle(cssDict(30,30,0,0),"solid black","white")
    g.addStyle(cssDict(0,0,0,10),"solid gray","#ebebeb") 
    
    try:
            fp = open("output.html", "w")  # open in read only mode
    except:
        raise badFileException
    
    g.displayWeb(output=fp,templateFile="template.html")
    fp.close()
    if DEBUG>0: print "4"
    print "done!"


def main(webForm):
    """CGI Main function.
    It reads from the webForm who submitted the petition,
    and generates the grid"""
    
    #webForm = cgi.FieldStorage()
    
    if DEBUG>0:
    	for name in webForm.keys():
        	print "Input: " + name + " value: " + \
                      webForm[name].value + "<BR>"

    if DEBUG>0: print "1"
    paddingDict = cssDict(int(webForm["paddingTop"].value),\
    			int(webForm["paddingRight"].value),\
			int(webForm["paddingBottom"].value),\
			int(webForm["paddingLeft"].value))        
    
    g = Grid(int(webForm["width"].value),             
             webForm["margins"].value,
             paddingDict,
             webForm["border"].value,
             webForm["colorBg"].value)
    
    if DEBUG>0: print "2"
    
    g.createCells(int(webForm["numberX"].value),
                  int(webForm["cellHeight"].value),
                  int(webForm["separateBy"].value),
                  webForm["colorFg"].value)

    border_1=cssDict(int(webForm["borderTop_1"].value),\
                     int(webForm["borderRight_1"].value),\
                     int(webForm["borderBottom_1"].value),\
                     int(webForm["borderLeft_1"].value))
    border_2=cssDict(int(webForm["borderTop_2"].value),\
                     int(webForm["borderRight_2"].value),\
                     int(webForm["borderBottom_2"].value),\
                     int(webForm["borderLeft_2"].value))

    g.addStyle(border_1,webForm["border_1"].value,webForm["color_1"].value)
    g.addStyle(border_2,webForm["border_2"].value,webForm["color_2"].value)
    
    #content=g.generateCSS()
    if DEBUG>0: print "3"
    
    g.displayWeb(templateFile="template.html")
    
    if DEBUG>0: print "4"
    #f = file("sample.css","r")
    #lines = f.readlines()
    #print lines



if __name__ == "__main__":
    consoleStart()