# Copyright 2016-present Facebook. All Rights Reserved.

#

# format: defines the format used to output annotate result

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from mercurial import (

    encoding,

    node,

    pycompat,

    templatefilters,

    util,

)

from mercurial.utils import (

        dateutil,

)

# imitating mercurial.commands.annotate, not using the vanilla formatter since

# the data structures are a bit different, and we have some fast paths.

class defaultformatter(object):

    """the default formatter that does leftpad and support some common flags"""

    def __init__(self, ui, repo, opts):

        self.ui = ui

        self.opts = opts

        if ui.quiet:

            datefunc = dateutil.shortdate

        else:

            datefunc = dateutil.datestr

        datefunc = util.cachefunc(datefunc)

        getctx = util.cachefunc(lambda x: repo[x[0]])

        hexfunc = self._hexfunc

        # special handling working copy "changeset" and "rev" functions

        if self.opts.get('rev') == 'wdir()':

            orig = hexfunc

            hexfunc = lambda x: None if x is None else orig(x)

            wnode = hexfunc(repo['.'].node()) + '+'

            wrev = '%d' % repo['.'].rev()

            wrevpad = ''

            if not opts.get('changeset'): # only show + if changeset is hidden

                wrev += '+'

                wrevpad = ' '

            revenc = lambda x: wrev if x is None else ('%d' % x) + wrevpad

            def csetenc(x):

                if x is None:

                    return wnode

                return pycompat.bytestr(x) + ' '

        else:

            revenc = csetenc = pycompat.bytestr

        # opt name, separator, raw value (for json/plain), encoder (for plain)

        opmap = [('user', ' ', lambda x: getctx(x).user(), ui.shortuser),

                 ('number', ' ', lambda x: getctx(x).rev(), revenc),

                 ('changeset', ' ', lambda x: hexfunc(x[0]), csetenc),

                 ('date', ' ', lambda x: getctx(x).date(), datefunc),

                 ('file', ' ', lambda x: x[2], pycompat.bytestr),

                 ('line_number', ':', lambda x: x[1] + 1, pycompat.bytestr)]

        fieldnamemap = {'number': 'rev', 'changeset': 'node'}

        funcmap = [(get, sep, fieldnamemap.get(op, op), enc)

                   for op, sep, get, enc in opmap

                   if opts.get(op)]

        # no separator for first column

        funcmap[0] = list(funcmap[0])

        funcmap[0][1] = ''

        self.funcmap = funcmap

    def write(self, annotatedresult, lines=None, existinglines=None):

        """(annotateresult, [str], set([rev, linenum])) -> None. write output.

        annotateresult can be [(node, linenum, path)], or [(node, linenum)]

        """

        pieces = [] # [[str]]

        maxwidths = [] # [int]

        # calculate padding

        for f, sep, name, enc in self.funcmap:

            l = [enc(f(x)) for x in annotatedresult]

            pieces.append(l)

            if name in ['node', 'date']: # node and date has fixed size

                l = l[:1]

            widths = pycompat.maplist(encoding.colwidth, set(l))

            maxwidth = (max(widths) if widths else 0)

            maxwidths.append(maxwidth)

        # buffered output

        result = ''

        for i in pycompat.xrange(len(annotatedresult)):

            for j, p in enumerate(pieces):

                sep = self.funcmap[j][1]

                padding = ' ' * (maxwidths[j] - len(p[i]))

                result += sep + padding + p[i]

            if lines:

                if existinglines is None:

                    result += ': ' + lines[i]

                else: # extra formatting showing whether a line exists

                    key = (annotatedresult[i][0], annotatedresult[i][1])

                    if key in existinglines:

                        result += ':  ' + lines[i]

                    else:

                        result += ': ' + self.ui.label('-' + lines[i],

                                                       'diff.deleted')

            if result[-1:] != '\n':

                result += '\n'

        self.ui.write(result)

    @util.propertycache

    def _hexfunc(self):

        if self.ui.debugflag or self.opts.get('long_hash'):

            return node.hex

        else:

            return node.short

    def end(self):

        pass

class jsonformatter(defaultformatter):

    def __init__(self, ui, repo, opts):

        super(jsonformatter, self).__init__(ui, repo, opts)

        self.ui.write('[')

        self.needcomma = False

    def write(self, annotatedresult, lines=None, existinglines=None):

        if annotatedresult:

            self._writecomma()

        pieces = [(name, pycompat.maplist(f, annotatedresult))

                  for f, sep, name, enc in self.funcmap]

        if lines is not None:

            pieces.append(('line', lines))

        pieces.sort()

        seps = [','] * len(pieces[:-1]) + ['']

        result = ''

        lasti = len(annotatedresult) - 1

        for i in pycompat.xrange(len(annotatedresult)):

            result += '\n {\n'

            for j, p in enumerate(pieces):

                k, vs = p

                result += ('  "%s": %s%s\n'

                           % (k, templatefilters.json(vs[i], paranoid=False),

                              seps[j]))

            result += ' }%s' % ('' if i == lasti else ',')

        if lasti >= 0:

            self.needcomma = True

        self.ui.write(result)

    def _writecomma(self):

        if self.needcomma:

            self.ui.write(',')

            self.needcomma = False

    @util.propertycache

    def _hexfunc(self):

        return node.hex

    def end(self):

        self.ui.write('\n]\n')