import cStringIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import A4
import ho.pisa as pisa
import urllib
import logging

DEFAULT_CSS = """
html {
    font-family: Helvetica; 
    font-size: 10px; 
    font-weight: normal;
    color: #000000; 
    background-color: transparent;
    margin: 0; 
    padding: 0;
    line-height: 150%;
    border: 1px none;
    display: inline;
    width: auto;
    height: auto;
    white-space: normal;    
}

b, 
strong { 
    font-weight: bold; 
}

i, 
em { 
    font-style: italic; 
}

u {
    text-decoration: underline;
}

s,
strike {
    text-decoration: line-through;
}

a {
    text-decoration: underline;
    color: blue;
}

ins {
    color: green;
    text-decoration: underline;
}
del {
    color: red;
    text-decoration: line-through;
}

pre,
code,
kbd,
samp,
tt {
    font-family: "Courier New";
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight:bold;
    -pdf-outline: true;    
    -pdf-outline-open: false;
}

h1 {
    /*18px via YUI Fonts CSS foundation*/
    font-size:138.5%; 
    -pdf-outline-level: 0;
}

h2 {
    /*16px via YUI Fonts CSS foundation*/
    font-size:123.1%;
    -pdf-outline-level: 1;
}

h3 {
    /*14px via YUI Fonts CSS foundation*/
    font-size:108%;
    -pdf-outline-level: 2;
}

h4 {
    -pdf-outline-level: 3;
}

h5 {
    -pdf-outline-level: 4;
}

h6 {
    -pdf-outline-level: 5;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
pre,
hr {
    margin:1em 0;
}

address,
blockquote,
body,
center,
dl,
dir,
div,
fieldset,
form,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
isindex,
menu,
noframes,
noscript,
ol,
p,
pre,
table,
th,
tr,
td,
ul,
li,
dd,
dt,
pdftoc {
    display: block;
}

table {
     -pdf-keep-in-frame-mode: shrink;
}

tr,
th,
td {

    vertical-align: middle;
    width: auto;
}

th {
    text-align: center;
    font-weight: bold;
}

center {
    text-align: center;
}

big {
    font-size: 125%;
}

small {
    font-size: 75%;
}


ul {
    margin-left: 1.5em;
    list-style-type: disc;
}

ul ul {
    list-style-type: circle;
}

ul ul ul {
    list-style-type: square;
}

ol {
    list-style-type: decimal;
    margin-left: 1.5em;
}

pre {
    white-space: pre;
}

blockquote {
    margin-left: 1.5em;
    margin-right: 1.5em;
}

noscript {
    display: none;
}  
"""
class PdfMaker():

    def createInMemoryPdf(self, pdfData):
        pdfBuffer = cStringIO.StringIO()
        
        c = canvas.Canvas(pdfBuffer, pagesize=A4)

        c.drawString(100, 100, pdfData)
        c.showPage()
        c.save()

        return pdfBuffer.getvalue()
    
    def createFromHtml(self, url, outputSize = 'b6', color=0, style=None, landscape=0, number=0):
        cssInsert = DEFAULT_CSS + """
            @page {
                @frame {
                    size: %s
                }
                size: %s;
            } 
        """ % (outputSize, outputSize)
        logging.info("cssInsert: " + cssInsert)
        pdfBuffer = cStringIO.StringIO()
        page = urllib.urlopen(url)
        logging.info(page)
        pdf = pisa.CreatePDF(
            page,
            pdfBuffer,
            format = outputSize,
            default_css = cssInsert,
            log_warn = 1,
            log_err = 1,
            path = url,
            link_callback = pisa.pisaLinkLoader(url).getFileName
        )
            
        return pdfBuffer.getvalue()