#!/usr/bin/env python3

#

# checkseclevel - checking section title levels in each online help document

from __future__ import absolute_import

import optparse

import os

import sys

# import from the live mercurial repo

os.environ['HGMODULEPOLICY'] = 'py'

sys.path.insert(0, "..")

from mercurial import demandimport

demandimport.enable()

from mercurial import (

    commands,

    extensions,

    help,

    minirst,

    ui as uimod,

)

table = commands.table

helptable = help.helptable

level2mark = [b'"', b'=', b'-', b'.', b'#']

reservedmarks = [b'"']

mark2level = {}

for m, l in zip(level2mark, range(len(level2mark))):

    if m not in reservedmarks:

        mark2level[m] = l

initlevel_topic = 0

initlevel_cmd = 1

initlevel_ext = 1

initlevel_ext_cmd = 3

def showavailables(ui, initlevel):

    avail = '    available marks and order of them in this help: %s\n' % (

        ', '.join(['%r' % (m * 4) for m in level2mark[initlevel + 1 :]])

    )

    ui.warn(avail.encode('utf-8'))

def checkseclevel(ui, doc, name, initlevel):

    ui.notenoi18n('checking "%s"\n' % name)

    if not isinstance(doc, bytes):

        doc = doc.encode('utf-8')

    blocks, pruned = minirst.parse(doc, 0, ['verbose'])

    errorcnt = 0

    curlevel = initlevel

    for block in blocks:

        if block[b'type'] != b'section':

            continue

        mark = block[b'underline']

        title = block[b'lines'][0]

        if (mark not in mark2level) or (mark2level[mark] <= initlevel):

            ui.warn(

                (

                    'invalid section mark %r for "%s" of %s\n'

                    % (mark * 4, title, name)

                ).encode('utf-8')

            )

            showavailables(ui, initlevel)

            errorcnt += 1

            continue

        nextlevel = mark2level[mark]

        if curlevel < nextlevel and curlevel + 1 != nextlevel:

            ui.warnnoi18n(

                'gap of section level at "%s" of %s\n' % (title, name)

            )

            showavailables(ui, initlevel)

            errorcnt += 1

            continue

        ui.notenoi18n(

            'appropriate section level for "%s %s"\n'

            % (mark * (nextlevel * 2), title)

        )

        curlevel = nextlevel

    return errorcnt

def checkcmdtable(ui, cmdtable, namefmt, initlevel):

    errorcnt = 0

    for k, entry in cmdtable.items():

        name = k.split(b"|")[0].lstrip(b"^")

        if not entry[0].__doc__:

            ui.notenoi18n(

                'skip checking %s: no help document\n' % (namefmt % name)

            )

            continue

        errorcnt += checkseclevel(

            ui, entry[0].__doc__, namefmt % name, initlevel

        )

    return errorcnt

def checkhghelps(ui):

    errorcnt = 0

    for h in helptable:

        names, sec, doc = h[0:3]

        if callable(doc):

            doc = doc(ui)

        errorcnt += checkseclevel(

            ui, doc, '%s help topic' % names[0], initlevel_topic

        )

    errorcnt += checkcmdtable(ui, table, '%s command', initlevel_cmd)

    for name in sorted(

        list(extensions.enabled()) + list(extensions.disabled())

    ):

        mod = extensions.load(ui, name, None)

        if not mod.__doc__:

            ui.notenoi18n(

                'skip checking %s extension: no help document\n' % name

            )

            continue

        errorcnt += checkseclevel(

            ui, mod.__doc__, '%s extension' % name, initlevel_ext

        )

        cmdtable = getattr(mod, 'cmdtable', None)

        if cmdtable:

            errorcnt += checkcmdtable(

                ui,

                cmdtable,

                '%%s command of %s extension' % name,

                initlevel_ext_cmd,

            )

    return errorcnt

def checkfile(ui, filename, initlevel):

    if filename == '-':

        filename = 'stdin'

        doc = sys.stdin.read()

    else:

        with open(filename) as fp:

            doc = fp.read()

    ui.notenoi18n(

        'checking input from %s with initlevel %d\n' % (filename, initlevel)

    )

    return checkseclevel(ui, doc, 'input from %s' % filename, initlevel)

def main():

    optparser = optparse.OptionParser(

        """%prog [options]

This checks all help documents of Mercurial (topics, commands,

extensions and commands of them), if no file is specified by --file

option.

"""

    )

    optparser.add_option(

        "-v", "--verbose", help="enable additional output", action="store_true"

    )

    optparser.add_option(

        "-d", "--debug", help="debug mode", action="store_true"

    )

    optparser.add_option(

        "-f",

        "--file",

        help="filename to read in (or '-' for stdin)",

        action="store",

        default="",

    )

    optparser.add_option(

        "-t",

        "--topic",

        help="parse file as help topic",

        action="store_const",

        dest="initlevel",

        const=0,

    )

    optparser.add_option(

        "-c",

        "--command",

        help="parse file as help of core command",

        action="store_const",

        dest="initlevel",

        const=1,

    )

    optparser.add_option(

        "-e",

        "--extension",

        help="parse file as help of extension",

        action="store_const",

        dest="initlevel",

        const=1,

    )

    optparser.add_option(

        "-C",

        "--extension-command",

        help="parse file as help of extension command",

        action="store_const",

        dest="initlevel",

        const=3,

    )

    optparser.add_option(

        "-l",

        "--initlevel",

        help="set initial section level manually",

        action="store",

        type="int",

        default=0,

    )

    (options, args) = optparser.parse_args()

    ui = uimod.ui.load()

    ui.setconfig(b'ui', b'verbose', options.verbose, b'--verbose')

    ui.setconfig(b'ui', b'debug', options.debug, b'--debug')

    if options.file:

        if checkfile(ui, options.file, options.initlevel):

            sys.exit(1)

    else:

        if checkhghelps(ui):

            sys.exit(1)

if __name__ == "__main__":

    main()