# -*- coding: utf-8 -*-
#
# Copyright Grégory Soutadé 2015

# This file is part of iwla

# iwla is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# iwla is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with iwla.  If not, see <http://www.gnu.org/licenses/>.
#

import os
import codecs
import time
import logging

#
# Create output HTML files
#

# Just for detection
def _(name): pass
_('January'), _('February'), _('March'), _('April'), _('May'), _('June'), _('July')
_('August'), _('September'), _('October'), _('November'), _('December')
del _

class DisplayHTMLRaw(object):

    def __init__(self, iwla, html=u''):
        self.iwla = iwla
        self.html = html

    def resetHTML(self):
        self.html = ''
        
    def setRawHTML(self, html):
        self.html = html

    def _buildHTML(self):
        pass

    def _build(self, f, html):
        if html: f.write(html)

    def build(self, f, filters=None):
        if filters: self.filter(filters)
        self._buildHTML()
        self._build(f, self.html)

    def _filter(self, function, **kwargs):
        pass

    def filter(self, filters):
        for (args, function) in filters:
            self._filter(function, **args)

    def getTitle(self):
        return ''

class DisplayHTMLBlock(DisplayHTMLRaw):

    def __init__(self, iwla, title=''):
        super(DisplayHTMLBlock, self).__init__(iwla, html='')
        self.title = title
        self.cssclass = u'iwla_block'
        self.title_cssclass = u'iwla_block_title'
        self.value_cssclass = u'iwla_block_value'

    def getTitle(self):
        return self.title

    def setTitle(self, value):
        self.title = value
        
    def setCSSClass(self, cssclass):
        self.cssclass = cssclass

    def setTitleCSSClass(self, cssclass):
        self.title_cssclass = cssclass

    def setValueCSSClass(self, cssclass):
        self.value_cssclass = cssclass

    def _buildHTML(self):
        html = u'<div class="%s">' % (self.cssclass)
        if self.title:
            html += u'<div class="%s">%s</div>' % (self.title_cssclass, self.title)
        html += u'<div class="%s">%s</div>' % (self.value_cssclass, self.html)
        html += u'</div>'

        self.html = html

class DisplayHTMLBlockTable(DisplayHTMLBlock):
    
    def __init__(self, iwla, title, cols, human_readable_cols=None):
        super(DisplayHTMLBlockTable, self).__init__(iwla=iwla, title=title)
        self.cols = listToStr(cols)
        self.rows = []
        self.cols_cssclasses = [u''] * len(cols)
        self.rows_cssclasses = []
        self.table_css = u'iwla_table'
        self.human_readable_cols = human_readable_cols or []

    def appendRow(self, row):
        self.rows.append(listToStr(row))
        self.rows_cssclasses.append([u''] * len(row))

    def insertCol(self, col_number, col_title='', col_css_class=''):
        self.cols.insert(col_number, col_title)
        for r in self.rows:
            r.insert(col_number, u'')
        for r in self.rows_cssclasses:
            v = r[0]
            # If all cells have the same CSS class, set it
            for cur_value in r:
                if v != cur_value:
                    v = None
                    break
            v = v or u''
            r.insert(col_number, v)
        self.cols_cssclasses.insert(col_number, col_css_class)

    def getNbRows(self):
        return len(self.rows)

    def getNbCols(self):
        return len(self.cols)

    def getCellValue(self, row, col):
        if row < 0 or col < 0 or\
           row >= len(self.rows) or col >= len(self.cols):
            raise ValueError('Invalid indices %d,%d' % (row, col))

        return self.rows[row][col]

    def setCellValue(self, row, col, value):
        if row < 0 or col < 0 or\
           row >= len(self.rows) or col >= len(self.cols):
            raise ValueError('Invalid indices %d,%d' % (row, col))

        self.rows[row][col] = value

    def setCellCSSClass(self, row, col, value):
        if row < 0 or col < 0 or\
           row >= len(self.rows) or col >= len(self.cols):
            raise ValueError('Invalid indices %d,%d' % (row, col))

        self.rows_cssclasses[row][col] = value

    def getCellCSSClass(self, row, col):
        if row < 0 or col < 0 or\
           row >= len(self.rows) or col >= len(self.cols):
            raise ValueError('Invalid indices %d,%d' % (row, col))

        return self.rows_cssclasses[row][col]

    def getColCSSClass(self, col):
        if col < 0 or col >= len(self.cols):
            raise ValueError('Invalid indice %d' % (col))

        return self.cols_cssclasses[col]

    def setRowCSSClass(self, row, value):
        if row < 0 or row >= len(self.rows):
            raise ValueError('Invalid indice %d' % (row))

        self.rows_cssclasses[row] = [value] * len(self.rows_cssclasses[row])

    def setColCSSClass(self, col, value):
        if col < 0 or col >= len(self.cols):
            raise ValueError('Invalid indice %d' % (col))

        self.cols_cssclasses[col] = value

    def setColsCSSClass(self, values):
        if len(values) != len(self.cols):
            raise ValueError('Invalid values size')

        self.cols_cssclasses = listToStr(values)

    def computeRatio(self, column, column_insertion=None):
        if column_insertion is None:
            column_insertion = column+1

        total = 0
        for r in self.rows:
            if r[column]:
                total += int(r[column])

        self.insertCol(column_insertion, self.iwla._('Ratio'), u'iwla_hit')
        for (index, r) in enumerate(self.rows):
            val = r[column] and int(r[column]) or 0
            self.setCellValue(index, column_insertion, '%.1f%%' % (float(val*100)/float(total)))

    def _filter(self, function, column, args):
        target_col = None
        for col in range(0, len(self.cols)):
            if self.cols[col] == column:
                target_col = col
                break
        if target_col is None: return
        for row in self.rows:
            res = function(row[target_col], **args)
            if res:
                row[target_col] = res

    def _buildHTML(self):
        style = u''
        if self.table_css: style = u' class="%s"' % (self.table_css)
        html = u'<table%s>' % (style)
        if self.cols:
            html += u'<tr>'
            for i in range (0, len(self.cols)):
                title = self.cols[i]
                style = self.getColCSSClass(i)
                if style: style = u' class="%s"' % (style)
                html += u'<th%s>%s</th>' % (style, title)
            html += u'</tr>'
        for i in range(0, len(self.rows)):
            row = self.rows[i]
            html += u'<tr>'
            for j in range(0, len(row)):
                v = row[j]
                if j in self.human_readable_cols:
                    v = bytesToStr(v)
                style = self.getCellCSSClass(i, j)
                if style: style = u' class="%s"' % (style)
                html += u'<td%s>%s</td>' % (style, v)
            html += u'</tr>'
        html += u'</table>'

        self.html += html

        super(DisplayHTMLBlockTable, self)._buildHTML()

class DisplayHTMLBlockTableWithGraph(DisplayHTMLBlockTable):

    def __init__(self, iwla, title, cols, short_titles=None, nb_valid_rows=0, graph_cols=None,
                 human_readable_cols=None):
        super(DisplayHTMLBlockTableWithGraph, self).__init__(iwla=iwla, title=title, cols=cols,
                                                             human_readable_cols=human_readable_cols)
        self.short_titles = short_titles or []
        self.short_titles = listToStr(self.short_titles)
        self.nb_valid_rows = nb_valid_rows
        self.icon_path = self.iwla.getConfValue('icon_path', '/')
        self.maxes = [0] * len(cols)
        self.table_graph_css = u'iwla_graph_table'
        self.td_img_css = u'iwla_td_img'
        self.graph_cols = graph_cols or []

    def appendShortTitle(self, short_title):
        self.short_titles.append(short_title)

    def setShortTitle(self, short_titles):
        self.short_titles = listToStr(short_titles)

    def setNbValidRows(self, nb_valid_rows):
        self.nb_valid_rows = nb_valid_rows

    def _computeMax(self):
        for i in range(0, self.nb_valid_rows):
            row = self.rows[i]
            for j in range(1, len(row)):
                if type(row[j]) != int:
                    continue
                if row[j] > self.maxes[j]:
                    self.maxes[j] = row[j]

    def _getIconFromStyle(self, style):
        if   style.startswith(u'iwla_page'):      icon = u'vp.png'
        elif style.startswith(u'iwla_hit'):       icon = u'vh.png'
        elif style.startswith(u'iwla_bandwidth'): icon = u'vk.png'
        elif style.startswith(u'iwla_visitor'):   icon = u'vu.png'
        elif style.startswith(u'iwla_visit'):     icon = u'vv.png'
        else: return ''

        return u'/%s/other/%s' % (self.icon_path, icon)

    def _buildHTML(self):
        self._computeMax()

        style = u''
        if self.table_graph_css: style = u' class="%s"' % (self.table_graph_css)
        html = u'<table%s>' % (style)
        html += u'<tr>'
        for i in range(0, self.nb_valid_rows):
            row = self.rows[i]
            css = u''
            if self.td_img_css: css=u' class="%s"' % (self.td_img_css)
            html += u'<td%s>' % (css)
            for j in self.graph_cols:
                style = self.getColCSSClass(j)
                icon = self._getIconFromStyle(style)
                if not icon: continue
                if style: style = u' class="%s"' % (style)
                alt = u'%s: %s' % (row[j], self.cols[j])
                if self.maxes[j]:
                    height = int((self.rows[i][j] * 100) / self.maxes[j]) or 1
                else:
                    height = 1
                html += u'<img%s src="%s" height="%d" width="6" alt="%s" title="%s" />' % (style, icon, height, alt, alt)
            html += u'</td>'
        html += u'</tr>'
        html += u'<tr>'
        for i in range(0, len(self.short_titles)):
            style = self.getCellCSSClass(i, 0)
            if style: style = u' class="%s"' % (style)
            html += u'<td%s>%s</td>' % (style, self.short_titles[i])
        html += u'</tr>'
        html += u'</table>'

        self.html += html

        super(DisplayHTMLBlockTableWithGraph, self)._buildHTML()

class DisplayHTMLPage(object):

    def __init__(self, iwla, title, filename, css_path):
        self.iwla = iwla
        self.title = title
        self.filename = filename
        self.blocks = []
        self.css_path = listToStr(css_path)
        self.logger = logging.getLogger(self.__class__.__name__)

    def getFilename(self):
        return self.filename;

    def getBlock(self, title):
        for b in self.blocks:
            if title == b.getTitle():
                return b
        return None

    def getAllBlocks(self):
        return self.blocks

    def appendBlock(self, block):
        self.blocks.append(block)

    def build(self, root, displayVersion=True, filters=None):
        filename = os.path.join(root, self.filename)

        base = os.path.dirname(filename)
        if not os.path.exists(base):
            os.makedirs(base)

        self.logger.debug('Write %s' % (filename))

        if self.iwla.dry_run: return

        f = codecs.open(filename, 'w', 'utf-8')
        f.write(u'<!DOCTYPE html>')
        f.write(u'<html>')
        f.write(u'<head>')
        f.write(u'<meta http-equiv="Content-type" content="text/html; charset=UTF-8" />')
        f.write(u'<link rel="icon" type="image/png" href="/resources/icon/favicon.png"/>')
        for css in self.css_path:
            f.write(u'<link rel="stylesheet" href="/%s"/>' % (css))
        if self.title:
            f.write(u'<title>%s</title>' % (self.title))
        f.write(u'</head><body>')
        for block in self.blocks:
            block.build(f, filters=filters)
        if displayVersion:
            f.write(u'<div style="text-align:center;width:100%%">Generated by <a href="%s">IWLA %s</a></div>' %
                    ("http://indefero.soutade.fr/p/iwla", self.iwla.getVersion()))
        f.write(u'</body></html>')
        f.close()

class DisplayHTMLBuild(object):

    def __init__(self, iwla):
        self.iwla = iwla
        self.filters = []
        self.clear()

    def clear(self):
        self.pages = []

    def createPage(self, *args):
        return DisplayHTMLPage(self.iwla, *args)
    
    def createBlock(self, _class, *args):
        return _class(self.iwla, *args)

    def getPage(self, filename):
        for page in self.pages:
            if page.getFilename() == filename:
                return page
        return None

    def getAllPages(self):
        return self.pages

    def addPage(self, page):
        self.pages.append(page)

    def build(self, root):
        if not self.iwla.dry_run:
            display_root = self.iwla.getConfValue('DISPLAY_ROOT', '')
            if not os.path.exists(display_root):
                os.makedirs(display_root)
            for res_path in self.iwla.getResourcesPath():
                target = os.path.abspath(res_path)
                link_name = os.path.join(display_root, res_path)
                if not os.path.exists(link_name):
                    os.symlink(target, link_name)

        for page in self.pages:
            page.build(root, filters=self.filters)

    def addColumnFilter(self, column, function, args):
        self.filters.append(({'column':column, 'args':args}, function))


#
# Global functions
#

def bytesToStr(_bytes):
    suffixes = [u'', u' kB', u' MB', u' GB', u' TB']

    for i in range(0, len(suffixes)):
        if _bytes < 1024: break
        _bytes /= 1024.0

    if i:
        return '%.02f%s' % (_bytes, suffixes[i])
    else:
        return '%d%s' % (_bytes, suffixes[i])

def _toStr(v):
    return v
    if type(v) != unicode: return unicode(v)
    else: return v

def listToStr(l): return l #map(lambda v : _toStr(v), l)

def generateHTMLLink(url, name=None, max_length=100, prefix=u'http'):
    url = url
    if not name: name = url
    if not url.startswith(prefix): url = u'%s://%s' % (prefix, url)
    return u'<a href="%s">%s</a>' % (url, name[:max_length])

def createCurTitle(iwla, title):
    title = iwla._(title)
    month_name = time.strftime(u'%B', iwla.getCurTime())
    year = time.strftime(u'%Y', iwla.getCurTime())
    title += u' - %s %s' % (iwla._(month_name), year)
    domain_name = iwla.getConfValue('domain_name', '')
    if domain_name:
        title += u' - %s' % (domain_name)
    return title