import sys, textwrap

# import from the live mercurial repo

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

from mercurial.commands import table, globalopts

from mercurial.i18n import gettext as _

from mercurial.help import helptable

def get_desc(docstr):

    if not docstr:

        return "", ""

    # sanitize

    docstr = docstr.strip("\n")

    docstr = docstr.rstrip()

    shortdesc = docstr.splitlines()[0].strip()

    i = docstr.find("\n")

    if i != -1:

        desc = docstr[i+2:]

    else:

        desc = "    %s" % shortdesc

    return (shortdesc, desc)

def get_opts(opts):

    for shortopt, longopt, default, desc in opts:

        allopts = []

        if shortopt:

            allopts.append("-%s" % shortopt)

        if longopt:

            allopts.append("--%s" % longopt)

        desc += default and _(" (default: %s)") % default or ""

        yield(", ".join(allopts), desc)

def get_cmd(cmd):

    d = {}

    attr = table[cmd]

    cmds = cmd.lstrip("^").split("|")

    d['synopsis'] = attr[2]

    d['cmd'] = cmds[0]

    d['aliases'] = cmd.split("|")[1:]

    d['desc'] = get_desc(attr[0].__doc__)

    d['opts'] = list(get_opts(attr[1]))

    return d

def show_doc(ui):

    def bold(s, text=""):

        ui.write("%s\n%s\n%s\n" % (s, "="*len(s), text))

    def underlined(s, text=""):

        ui.write("%s\n%s\n%s\n" % (s, "-"*len(s), text))

    # print options

    underlined(_("OPTIONS"))

    for optstr, desc in get_opts(globalopts):

        ui.write("%s::\n    %s\n\n" % (optstr, desc))

    # print cmds

    underlined(_("COMMANDS"))

    h = {}

    for c, attr in table.items():

            f = c.split("|")[0]

            f = f.lstrip("^")

            h[f] = c

    cmds = h.keys()

    cmds.sort()

    for f in cmds:

            if f.startswith("debug"): continue

            d = get_cmd(h[f])

            # synopsis

            ui.write("%s::\n" % d['synopsis'].replace("hg ","", 1))

            # description

            ui.write("%s\n\n" % d['desc'][1])

            # options

            opt_output = list(d['opts'])

            if opt_output:

                opts_len = max([len(line[0]) for line in opt_output])

                ui.write(_("    options:\n"))

                for optstr, desc in opt_output:

                    if desc:

                        s = "%-*s  %s" % (opts_len, optstr, desc)

                    else:

                        s = optstr

                    s = textwrap.fill(s, initial_indent=4 * " ",

                                      subsequent_indent=(6 + opts_len) * " ")

                    ui.write("%s\n" % s)

                ui.write("\n")

            # aliases

            if d['aliases']:

                ui.write(_("    aliases: %s\n\n") % " ".join(d['aliases']))

    # print topics

    for t in helptable:

        l = t.split("|")

        section = l[-1]

        underlined(_(section).upper())

        doc = helptable[t]

        if callable(doc):

            doc = doc()

        ui.write(_(doc))

        ui.write("\n")

if __name__ == "__main__":

    show_doc(sys.stdout)