#!/usr/bin/env python

###
# Copyright (c) 2005, Ali Afshar
# Copyright (c) 2009, James Vega
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

import os
import sys
import shutil

import supybot

def error(s):
    sys.stderr.write('%s\n' % s)
    sys.exit(-1)

# We need to do this before we import conf.
if not os.path.exists('doc-conf'):
    os.mkdir('doc-conf')

registryFilename = os.path.join('doc-conf', 'doc.conf')
try:
    fd = file(registryFilename, 'w')
    fd.write("""
supybot.directories.data: doc-data
supybot.directories.conf: doc-conf
supybot.directories.log: doc-logs
supybot.log.stdout: False
supybot.log.level: DEBUG
supybot.log.format: %(levelname)s %(message)s
supybot.log.plugins.individualLogfiles: False
supybot.databases: sqlite anydbm cdb flat pickle
""")
    fd.close()
except EnvironmentError, e:
    error('Unable to open %s for writing.' % registryFilename)

import supybot.registry as registry
registry.open(registryFilename)

import supybot.log as log
import supybot.conf as conf
conf.supybot.flush.setValue(False)

import textwrap

import supybot.utils as utils
import supybot.world as world
import supybot.plugin as plugin
import supybot.registry as registry

world.documenting = True

class PluginDoc(object):
    def __init__(self, mod):
        self.mod = mod
        self.inst = self.mod.Class(None)
        self.name = self.mod.Class.__name__
        self.appendExtraBlankLine = False
        self.lines = []

    def appendLine(self, line, indent=0):
        line = line.strip()
        indent = '  ' * indent
        lines = textwrap.wrap(line, 79,
                              initial_indent=indent,
                              subsequent_indent=indent)
        self.lines.extend(lines)
        if self.appendExtraBlankLine:
            self.lines.append('')

    def renderRST(self):
        self.appendExtraBlankLine = False
        s = 'Documentation for the %s plugin for Supybot' % self.name
        self.appendLine(s)
        self.appendLine('=' * len(s))
        self.lines.append('')
        self.appendLine('Purpose')
        self.appendLine('-------')
        pdoc = getattr(self.mod, '__doc__',
                       'My author didn\'t give me a purpose.')
        self.appendLine(pdoc)
        self.lines.append('')
        cdoc = getattr(self.mod.Class, '__doc__', None)
        if cdoc is not None:
            self.appendLine('Usage')
            self.appendLine('-----')
            self.appendLine(cdoc)
            self.lines.append('')
        commands = self.inst.listCommands()
        if len(commands):
            self.appendLine('Commands')
            self.appendLine('--------')
            for command in commands:
                log.debug('command: %s', command)
                line = '%s ' % command
                command = command.split()
                doc = self.inst.getCommandHelp(command)
                if doc:
                    doc = doc.replace('\x02', '')
                    (args, help) = doc.split(')', 1)
                    args = args.split('(', 1)[1]
                    args = args[len(' '.join(command)):].strip()
                    help = help.split('--', 1)[1].strip()
                    self.appendLine(line + args)
                    self.appendLine(help, 1)
                else:
                    self.appendLine('No help associated with this command')
                self.lines.append('')
        # now the config
        try:
            confs = conf.supybot.plugins.get(self.name)
            self.appendLine('Configuration')
            self.appendLine('-------------')
        except registry.NonExistentRegistryEntry:
            log.info('No configuration for plugin %s', plugin)
            self.appendLine('No configuration for this plugin')
        else:
            for confValues in self.genConfig(confs, 0):
                (name, isChan, help, default, indent) = confValues
                self.appendLine('%s' % name, indent - 1)
                self.appendLine('This config variable defaults to %s and %s '
                                'channel specific.' % (default,isChan), indent)
                self.lines.append('')
                self.appendLine(help, indent)
                self.lines.append('')
        return '\n'.join(self.lines) + '\n'

    def renderSTX(self):
        self.appendExtraBlankLine = True
        self.appendLine('Documentation for the %s plugin for '
                        'Supybot' % self.name)
        self.appendLine('Purpose', 1)
        pdoc = getattr(self.mod, '__doc__',
                       'My author didn\'t give me a purpose.')
        self.appendLine(pdoc, 2)
        cdoc = getattr(self.mod.Class, '__doc__', None)
        if cdoc is not None:
            self.appendLine('Usage', 1)
            self.appendLine(cdoc, 2)
        commands = self.inst.listCommands()
        if len(commands):
            self.appendLine('Commands', 1)
            for command in commands:
                log.debug('command: %s', command)
                line = '* %s ' % command
                command = command.split()
                doc = self.inst.getCommandHelp(command)
                if doc:
                    doc = doc.replace('\x02', '')
                    (args, help) = doc.split(')', 1)
                    args = args.split('(', 1)[1]
                    args = args[len(' '.join(command)):].strip()
                    help = help.split('--', 1)[1].strip()
                    self.appendLine(line + args, 2)
                    self.appendLine(help, 3)
                else:
                    self.appendLine('No help associated with this command', 3)
        # now the config
        try:
            confs = conf.supybot.plugins.get(self.name)
            self.appendLine('Configuration', 1)
        except registry.NonExistentRegistryEntry:
            log.info('No configuration for plugin %s', plugin)
            self.appendLine('No configuration for this plugin', 2)
        else:
            for confValues in self.genConfig(confs, 2):
                (name, isChan, help, default, indent) = confValues
                self.appendLine('* %s' % name, indent - 1)
                self.appendLine('This config variable defaults to %s and %s '
                                'channel specific.' % (default,isChan), indent)
                self.appendLine(help, indent)
        return '\n'.join(self.lines) + '\n'

    def genConfig(self, item, origindent):
        confVars = item.getValues(getChildren=False, fullNames=False)
        if not confVars:
            return
        for (c, v) in confVars:
            name = v._name
            indent = origindent + 1
            try:
                default = str(v)
                if isinstance(v._default, basestring) or v._default is None:
                    default = utils.str.dqrepr(default)
                help = v.help()
                channelValue = v.channelValue
            except registry.NonExistentRegistryEntry:
                pass
            else:
                if channelValue:
                    cv = 'is'
                else:
                    cv = 'is not'
                yield (name, cv, help, default, indent)
            for confValues in self.genConfig(v, indent):
                yield confValues

def genDoc(m, options):
    Plugin = PluginDoc(m)
    print 'Generating documentation for %s...' % Plugin.name
    path = os.path.join(options.outputDir, '%s.%s' % (Plugin.name,
                                                      options.format))
    try:
        fd = file(path, 'w')
    except EnvironmentError, e:
        error('Unable to open %s for writing.' % path)
    f = getattr(Plugin, 'render%s' % options.format.upper(), None)
    if f is None:
        fd.close()
        error('Unknown render format: `%s\'' % options.format)
    try:
        fd.write(f())
    finally:
        fd.close()

if __name__ == '__main__':
    import glob
    import os.path
    import optparse
    import supybot.plugin as plugin

    parser = optparse.OptionParser(usage='Usage: %prog [options] [plugins]',
                                   version='Supybot %s' % conf.version)
    parser.add_option('-c', '--clean', action='store_true', default=False,
                      dest='clean', help='Cleans the various data/conf/logs '
                      'directories after generating the docs.')
    parser.add_option('-o', '--output-dir', dest='outputDir', default='.',
                      help='Specifies the directory in which to write the '
                      'documentation for the plugin.')
    parser.add_option('-f', '--format', dest='format', choices=['rst', 'stx'],
                      default='stx', help='Specifies which output format to '
                      'use.')
    parser.add_option('--plugins-dir',
                      action='append', dest='pluginsDirs', default=[],
                      help='Looks in in the given directory for plugins and '
                      'generates documentation for all of them.')
    (options, args) = parser.parse_args()

    # This must go before checking for args, of course.
    for pluginDir in options.pluginsDirs:
        for name in glob.glob(os.path.join(pluginDir, '*')):
            if os.path.isdir(name):
                args.append(name)

    if not args:
        parser.print_help()
        sys.exit(-1)

    args = [s.rstrip('\\/') for s in args]
    pluginDirs = set([os.path.dirname(s) or '.' for s in args])
    conf.supybot.directories.plugins.setValue(list(pluginDirs))
    pluginNames = set([os.path.basename(s) for s in args])
    plugins = set([])
    for pluginName in pluginNames:
        if pluginName.endswith('.py'):
            pluginName = pluginName[:-3]
        try:
            pluginModule = plugin.loadPluginModule(pluginName)
        except ImportError, e:
            s = 'Failed to load plugin %s: %s\n' \
                '%s(pluginDirs: %s)' % (pluginName, e, s,
                                        conf.supybot.directories.plugins())
            error(s)
        plugins.add(pluginModule)

    for Plugin in plugins:
        genDoc(Plugin, options)

    if options.clean:
        shutil.rmtree(conf.supybot.directories.log())
        shutil.rmtree(conf.supybot.directories.conf())
        shutil.rmtree(conf.supybot.directories.data())

# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=78:
