#!/usr/bin/python
#
# Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#
# Authors: Jan Safranek <jsafrane@redhat.com>
#          Radek Novacek <rnovacek@redhat.com>
#

import os
import konkretmof
import optparse
import re
import cgi
import sys

class HtmlExporter(object):

    def __init__(self):
        self.classcache = {}
        # original list of classes
        self.classes = []
        # list of all classes to print, i.e. incl. all parents
        self.queue = []
        self.file = None

    def link(self, classname, attributename = ""):
        if attributename:
            link = classname + "-" + attributename
        else:
            link = classname
        link = str(link).replace("_","-")
        return link

    def print_escaped(self, string, prefix = ""):
        # replace \n with prefixes
        lines = string.split("\n")
        for line in lines:
            print >>self.file, prefix + line
            print >>self.file, ""

    def source_class(self, c, param):
        """
            Find a class where a CIMMethod or CIMProperty is first defined.
            Start at class c and inspect all parents.
        """

        while True:
            if isinstance(param, konkretmof.MOF_Method_Decl):
                if not c.methods().has_key(param.name):
                    break
            else:
                if not c.properties().has_key(param.name):
                    break

            if not c.super_class:
                # we're at the top class
                return c.name

            parent = c
            c = c.super_class
        return parent.name

    def display_type(self, param):
        """
            Return displayable type of given parameter.
            It adds [] if it's array and class name of referenced classes.
        """
        url = False
        if isinstance(param, konkretmof.MOF_Reference_Decl):
            ptype = param.class_name
            url = True
        elif isinstance(param, konkretmof.MOF_Parameter) and (param.data_type == konkretmof.TOK_REF):
            ptype = param.ref_name
            self.add_class(param.ref_name)
            url = True
        else:
            ptype = param.type_name()

        if isinstance(param, (konkretmof.MOF_Property_Decl, konkretmof.MOF_Parameter)) and param.array_index != 0:
            ptype = ptype + "[]"
        if url:
            if ptype.endswith("[]"):
                ptype = ":ref:`%s <%s>`" % (ptype, self.link(ptype[:-2]))
            else:
                ptype = ":ref:`%s <%s>`" % (ptype, self.link(ptype))
        else:
            ptype = "``" + ptype + "``"
        return ptype

    def print_parameters(self, params):
        """
            Print table of method parametes.
        """
        function_indent = " "*4
        if not params:
            print >>self.file, "*None*"
            return

        for p in params:
            param_indent = " "*8
            direction = set()
            if p.qualifiers and p.qualifiers.has_key("out"):
                direction.add("*OUT*")
            if p.qualifiers and p.qualifiers.has_key("in"):
                if p.qualifiers.get("in").params.value():
                    direction.add("*IN*")
            if not direction:
                direction.add("*IN*")
            direction = ", ".join(sorted(direction))

            print >>self.file, param_indent + "%s %s **%s**" % (direction, self.display_type(p), p.name)
            if p.qualifiers:
                self.print_qualifiers(p.qualifiers, param_indent+ " "*4)
            print >>self.file, param_indent
        print >>self.file, function_indent

    def print_prototype(self, method):
        """ Print function prototype """
        self.file.write("``" + method.type_name() + "`` ")
        self.file.write("**" + method.name + "** (")
        params = []
        if method.parameters:
            for p in method.parameters:
                params.append((self.display_type(p) + " " + p.name))
        self.file.write(", ".join(params))
        self.file.write(")\n")

    def print_table(self, col1, col2, indent):
        """
            Print table with two columns.
        """
        len1 = max(max(map(len, col1)), len("ValueMap"))
        len2 = max(max(map(len, col2)), len("Values"))
        separator = "="*len1 + " " + "="*len2
        print >>self.file, indent + separator
        print >>self.file, indent + format("ValueMap", str(len1)) + " " + format("Values", str(len2))
        print >>self.file, indent + separator
        for i in range(len(col1)):
            print >>self.file, indent + format(col1[i], str(len1)) + " " + format(col2[i], str(len2))
        print >>self.file, indent + separator

    def print_qualifiers(self, qualifiers, indent):
        """
            Print content of table of qualifiers.
            Only Deprecated, Description, Values and ValueMap are recognized.
        """
        deprecated = ""
        values = None
        maps = None
        if not qualifiers:
            return
        for q in sorted(qualifiers):
            if not q:
                continue
            qname = q.name.lower()
            if qname == "deprecated":
                deprecated = "**Deprecated!** "
            if qname == "description":
                if deprecated:
                    print >>self.file, indent + deprecated
                self.print_escaped(q.params.value(), indent)
            if qname == "values":
                values = []
                for p in q.params:
                    values.append(p.value())
            if qname == "valuemap":
                maps = []
                for p in q.params:
                    maps.append(p.value())
        print >>self.file, indent
        if maps and values:
            self.print_table(maps, values, indent)
            print >>self.file, indent

    def print_keys(self, class_hiearchy):
        print >>self.file, "Key properties"
        print >>self.file, "^^^^^^^^^^^^^^"
        print >>self.file, ""
        for cls in class_hiearchy:
            for prop in cls.properties().values():
                if prop.qualifiers and prop.qualifiers.has_key('key'):
                    src = self.source_class(cls, prop)
                    link = self.link(src, prop.name)
                    print >>self.file, "| :ref:`%s <%s>`" % (prop.name, link)
        print >>self.file, ""

    def print_class(self, c):
        """
            Print one class, inc. header.
        """
        # We want to print following qualifiers for properties/methods
        known_qualifiers = ("deprecated", "description", "values", "valuemap")
        parent = None
        class_hiearchy = [c]
        cc = c
        while cc.super_class:
            cc = cc.super_class
            class_hiearchy.append(cc)

        if c.super_class:
            parent = c.super_class
            print >>self.file, "Subclass of :ref:`%s <%s>`" % (c.super_class_name, self.link(c.super_class_name))
            print >>self.file, ""

        for cls in class_hiearchy:
            if cls.qualifiers:
                description = cls.qualifiers.get("description")
                if description:
                    self.print_escaped(description.params.value(), "")
                    break
        print >>self.file, ""

        self.print_keys(class_hiearchy)

        # Create dictionaries with properties and methods of given class and fill them
        properties = {}
        methods = {}
        for cls in class_hiearchy:
            for prop in cls.properties().values():
                if prop.name not in properties.keys():
                    properties[prop.name] = prop
                    prop.cls = cls
                    prop.is_local = cls == c
                    prop.known_qualifiers = {}
                    if prop.qualifiers:
                        for q in known_qualifiers:
                            prop.known_qualifiers[q] = prop.qualifiers.get(q)
                else:
                    inherited_prop = properties[prop.name]
                    for q in known_qualifiers:
                        if not inherited_prop.known_qualifiers[q]:
                            inherited_prop.known_qualifiers[q] = prop.qualifiers.get(q)
            for meth in cls.methods().values():
                if meth.name not in methods.keys():
                    methods[meth.name] = meth
                    meth.cls = cls
                    meth.is_local = cls.name == c.name
                    meth.known_qualifiers = {}
                    if meth.qualifiers:
                        for q in known_qualifiers:
                            meth.known_qualifiers[q] = meth.qualifiers.get(q)
                else:
                    inherited_meth = methods[meth.name]
                    for q in known_qualifiers:
                        if not inherited_meth.known_qualifiers[q]:
                            inherited_meth.known_qualifiers[q] = meth.qualifiers.get(q)

        print >>self.file, "Local properties"
        print >>self.file, "^^^^^^^^^^^^^^^^"
        print >>self.file, ""
        present = False
        for prop in properties.values():
            if prop.is_local:
                present = True
                prop_link = self.link(c.name, prop.name)
                print >>self.file, ".. _%s:" % (prop_link)
                print >>self.file, ""
                print >>self.file, "%s **%s**" % (self.display_type(prop), prop.name)
                print >>self.file, ""
                self.print_qualifiers(prop.known_qualifiers.values(), " "*4)
        if not present:
            print >>self.file, "*None*"
        print >>self.file, ""

        print >>self.file, "Local methods"
        print >>self.file, "^^^^^^^^^^^^^"
        print >>self.file, ""
        present = False
        for m in methods.values():
            if m.is_local:
                present = True
                link = self.link(c.name, m.name)
                print >>self.file, "    .. _%s:" % (link)
                print >>self.file, ""
                self.print_prototype(m)
                print >>self.file, ""
                self.print_qualifiers(m.known_qualifiers.values(), " "*4)
                print >>self.file, "    **Parameters**"
                print >>self.file, "    "
                self.print_parameters(m.parameters)
        if not present:
            print >>self.file, "*None*"
        print >>self.file, ""

        print >>self.file, "Inherited properties"
        print >>self.file, "^^^^^^^^^^^^^^^^^^^^"
        print >>self.file, ""
        present = False
        for prop in properties.values():
            if not prop.is_local:
                present = True
                link = self.link(prop.cls.name, prop.name)
                print >>self.file, "| %s :ref:`%s <%s>`" % (self.display_type(prop), prop.name, link)
        if not present:
            print >>self.file, "*None*"
        print >>self.file, ""

        print >>self.file, "Inherited methods"
        print >>self.file, "^^^^^^^^^^^^^^^^^"
        print >>self.file, ""
        present = False
        for m in methods.values():
            if not m.is_local:
                present = True
                link = self.link(m.cls.name, m.name)
                print >>self.file, "| :ref:`%s <%s>`" % (m.name, link)
        if not present:
            print >>self.file, "*None*"
        print >>self.file, ""


    def print_file(self, filename):
        f = open(filename, "r")
        data = f.read()
        self.file.write(data)
        f.close()

    def print_page(self, c, header, footer):
        print "exporting ", c.name
        self.file = open(c.name + ".rst", "w")
        print >>self.file, ".. _%s:" % self.link(c.name)
        print >>self.file, ""
        print >>self.file, c.name
        print >>self.file, "-"*len(c.name)
        print >>self.file, ""
        if header:
            self.print_file(header)
        self.print_class(c)
        if footer:
            self.print_file(footer)
        self.file.close()

    def add_class(self, classname):
        if classname in self.classes:
            return
        c = konkretmof.MOF_Class_Decl.list.fget().find(classname)
        if not c:
            print 'No such class "%s"' % classname
            return
        self.classes.append(classname)
        print "adding", c.name
        self.queue.append(c)
        if c.super_class:
            self.add_class(c.super_class_name)

    def export(self, header=None, footer=None):
        """
            Print everything, i.e. index.rst + all classes + all their parents.
        """
        # remove duplicate classes from the queue (and sort them)
        self.queue.sort(key=lambda c:c.name)
        self.print_tree_rst(header, footer)
        self.print_index_rst(header, footer)
        while self.queue:
            c = self.queue.pop()
            self.print_page(c, header, footer)

    def _do_print_tree(self, name, subtree, level):
        nbsp=" |nbsp| "
        if level:
            print >>self.file, "|    "  + ("\\|"+nbsp*7)*(level-1) + "\\|---",
        else:
            print >>self.file, "|",
        if name in self.classes:
            print >>self.file, "\*",
        link = self.link(name)
        print >>self.file, ":ref:`%s <%s>`" % (name, link)
        for n in subtree.keys():
            self._do_print_tree(n, subtree[n], level+1)

    def print_tree(self):
        """
            Create inheritance tree of classes.
        """
        # hash classname -> list of hash of (direct) sublasses
        subclasses = {}
        # hash classname -> nr. of its parents
        parents = {}
        # initialize the hash
        for c in self.queue:
            subclasses[c.name] = {}
            parents[c.name] = 0

        # fill the hash
        for c in self.queue:
            if c.super_class:
                subclasses[c.super_class_name][c.name] = subclasses[c.name]
                parents[c.name] += 1

        print >>self.file, ".. |nbsp| unicode:: 0xA0"
        print >>self.file, "    :trim:"
        print >>self.file, ""
        # print all top classes
        for c in self.queue:
            if parents[c.name] == 0:
                self._do_print_tree(c.name, subclasses[c.name], 0)

    def print_index(self):
        """
            Create table of content.
        """
        # hash classname -> list of hash of (direct) sublasses
        print >>self.file, ".. toctree::"
        print >>self.file, "    :maxdepth: 1"
        print >>self.file, ""
        # print all top classes
        for c in self.queue:
            print >>self.file, "    " + c.name


    def print_tree_rst(self, header, footer):
        print "exporting tree"
        self.file = open("tree.rst", "w")
        print >>self.file, "Inheritance tree"
        print >>self.file, "================"
        print >>self.file, ""

        self.print_tree()
        self.file.close()

    def print_index_rst(self, header, footer):
        print "exporting index"
        self.file = open("index.rst", "w")
        if header:
            self.print_file(header)
        self.print_index()
        if footer:
            self.print_file(footer)
        self.file.close()

description = """
Generate RST documentation from given MOF files. It generates separate RST file for each class
specified on command line and for all it's parents.

The tool also generates tree.rst with inheritance tree and index.rst with table of content.

The index.rst will optionally contain header and/or footer. Both must be valid
RST code snippets and will be inserted just at the beginning or at the end of the file.

Use Sphinx to generate html documentation from the RST files.
"""

parser = optparse.OptionParser(usage="usage: %prog [options] classname [classname ...]", description=description)
parser.add_option('-M', '--mof', action='append', dest='mof', default=[], help='MOF files to generate documentation from, can be used multiple times')
parser.add_option('-S', '--schema', action='append', dest='schema', default=[], help='MOF files to scan for dependencies, can be used multiple times')
parser.add_option('-H', '--header', action='store', dest='header', default=None, help='File with HTML page header')
parser.add_option('-F', '--footer', action='store', dest='footer', default=None, help='File with HTML page footer')

(options, args) = parser.parse_args()

exporter = HtmlExporter()

for mof in options.schema:
    konkretmof.MOF_add_include_path(os.path.dirname(mof))
    konkretmof.MOF_parse_file(mof)

for mof in options.mof:
    konkretmof.MOF_parse_file(mof)

for cls in konkretmof.MOF_Class_Decl.list.fget():
    if cls.file_name in options.mof:
        exporter.add_class(cls.name)
for cls in args:
    exporter.add_class(cls)

exporter.export(options.header, options.footer)