#

# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>

# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>

#

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

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

import os, mimetypes, re, cgi, copy

import webutil

from mercurial import error, encoding, archival, templater, templatefilters

from mercurial.node import short, hex

from mercurial.util import binary

from common import paritygen, staticfile, get_contact, ErrorResponse

from common import HTTP_OK, HTTP_FORBIDDEN, HTTP_NOT_FOUND

from mercurial import help as helpmod

from mercurial.i18n import _

# __all__ is populated with the allowed commands. Be sure to add to it if

# you're adding a new command, or the new command won't work.

__all__ = [

   'log', 'rawfile', 'file', 'changelog', 'shortlog', 'changeset', 'rev',

   'manifest', 'tags', 'bookmarks', 'branches', 'summary', 'filediff', 'diff',

   'annotate', 'filelog', 'archive', 'static', 'graph', 'help',

]

def log(web, req, tmpl):

    if 'file' in req.form and req.form['file'][0]:

        return filelog(web, req, tmpl)

    else:

        return changelog(web, req, tmpl)

def rawfile(web, req, tmpl):

    guessmime = web.configbool('web', 'guessmime', False)

    path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])

    if not path:

        content = manifest(web, req, tmpl)

        req.respond(HTTP_OK, web.ctype)

        return content

    try:

        fctx = webutil.filectx(web.repo, req)

    except error.LookupError, inst:

        try:

            content = manifest(web, req, tmpl)

            req.respond(HTTP_OK, web.ctype)

            return content

        except ErrorResponse:

            raise inst

    path = fctx.path()

    text = fctx.data()

    mt = 'application/binary'

    if guessmime:

        mt = mimetypes.guess_type(path)[0]

        if mt is None:

            mt = binary(text) and 'application/binary' or 'text/plain'

    if mt.startswith('text/'):

        mt += '; charset="%s"' % encoding.encoding

    req.respond(HTTP_OK, mt, path, len(text))

    return [text]

def _filerevision(web, tmpl, fctx):

    f = fctx.path()

    text = fctx.data()

    parity = paritygen(web.stripecount)

    if binary(text):

        mt = mimetypes.guess_type(f)[0] or 'application/octet-stream'

        text = '(binary:%s)' % mt

    def lines():

        for lineno, t in enumerate(text.splitlines(True)):

            yield {"line": t,

                   "lineid": "l%d" % (lineno + 1),

                   "linenumber": "% 6d" % (lineno + 1),

                   "parity": parity.next()}

    return tmpl("filerevision",

                file=f,

                path=webutil.up(f),

                text=lines(),

                rev=fctx.rev(),

                node=fctx.hex(),

                author=fctx.user(),

                date=fctx.date(),

                desc=fctx.description(),

                branch=webutil.nodebranchnodefault(fctx),

                parent=webutil.parents(fctx),

                child=webutil.children(fctx),

                rename=webutil.renamelink(fctx),

                permissions=fctx.manifest().flags(f))

def file(web, req, tmpl):

    path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])

    if not path:

        return manifest(web, req, tmpl)

    try:

        return _filerevision(web, tmpl, webutil.filectx(web.repo, req))

    except error.LookupError, inst:

        try:

            return manifest(web, req, tmpl)

        except ErrorResponse:

            raise inst

def _search(web, req, tmpl):

    query = req.form['rev'][0]

    revcount = web.maxchanges

    if 'revcount' in req.form:

        revcount = int(req.form.get('revcount', [revcount])[0])

        revcount = max(revcount, 1)

        tmpl.defaults['sessionvars']['revcount'] = revcount

    lessvars = copy.copy(tmpl.defaults['sessionvars'])

    lessvars['revcount'] = max(revcount / 2, 1)

    lessvars['rev'] = query

    morevars = copy.copy(tmpl.defaults['sessionvars'])

    morevars['revcount'] = revcount * 2

    morevars['rev'] = query

    def changelist(**map):

        count = 0

        qw = query.lower().split()

        def revgen():

            for i in xrange(len(web.repo) - 1, 0, -100):

                l = []

                for j in xrange(max(0, i - 100), i + 1):

                    ctx = web.repo[j]

                    l.append(ctx)

                l.reverse()

                for e in l:

                    yield e

        for ctx in revgen():

            miss = 0

            for q in qw:

                if not (q in ctx.user().lower() or

                        q in ctx.description().lower() or

                        q in " ".join(ctx.files()).lower()):

                    miss = 1

                    break

            if miss:

                continue

            count += 1

            n = ctx.node()

            showtags = webutil.showtag(web.repo, tmpl, 'changelogtag', n)

            files = webutil.listfilediffs(tmpl, ctx.files(), n, web.maxfiles)

            yield tmpl('searchentry',

                       parity=parity.next(),

                       author=ctx.user(),

                       parent=webutil.parents(ctx),

                       child=webutil.children(ctx),

                       changelogtag=showtags,

                       desc=ctx.description(),

                       date=ctx.date(),

                       files=files,

                       rev=ctx.rev(),

                       node=hex(n),

                       tags=webutil.nodetagsdict(web.repo, n),

                       bookmarks=webutil.nodebookmarksdict(web.repo, n),

                       inbranch=webutil.nodeinbranch(web.repo, ctx),

                       branches=webutil.nodebranchdict(web.repo, ctx))

            if count >= revcount:

                break

    tip = web.repo['tip']

    parity = paritygen(web.stripecount)

    return tmpl('search', query=query, node=tip.hex(),

                entries=changelist, archives=web.archivelist("tip"),

                morevars=morevars, lessvars=lessvars)

def changelog(web, req, tmpl, shortlog=False):

    if 'node' in req.form:

        ctx = webutil.changectx(web.repo, req)

    else:

        if 'rev' in req.form:

            hi = req.form['rev'][0]

        else:

            hi = len(web.repo) - 1

        try:

            ctx = web.repo[hi]

        except error.RepoError:

            return _search(web, req, tmpl) # XXX redirect to 404 page?

    def changelist(limit=0, **map):

        l = [] # build a list in forward order for efficiency

        for i in xrange(start, end):

            ctx = web.repo[i]

            n = ctx.node()

            showtags = webutil.showtag(web.repo, tmpl, 'changelogtag', n)

            files = webutil.listfilediffs(tmpl, ctx.files(), n, web.maxfiles)

            l.insert(0, {"parity": parity.next(),

                         "author": ctx.user(),

                         "parent": webutil.parents(ctx, i - 1),

                         "child": webutil.children(ctx, i + 1),

                         "changelogtag": showtags,

                         "desc": ctx.description(),

                         "date": ctx.date(),

                         "files": files,

                         "rev": i,

                         "node": hex(n),

                         "tags": webutil.nodetagsdict(web.repo, n),

                         "bookmarks": webutil.nodebookmarksdict(web.repo, n),

                         "inbranch": webutil.nodeinbranch(web.repo, ctx),

                         "branches": webutil.nodebranchdict(web.repo, ctx)

                        })

        if limit > 0:

            l = l[:limit]

        for e in l:

            yield e

    revcount = shortlog and web.maxshortchanges or web.maxchanges

    if 'revcount' in req.form:

        revcount = int(req.form.get('revcount', [revcount])[0])

        revcount = max(revcount, 1)

        tmpl.defaults['sessionvars']['revcount'] = revcount

    lessvars = copy.copy(tmpl.defaults['sessionvars'])

    lessvars['revcount'] = max(revcount / 2, 1)

    morevars = copy.copy(tmpl.defaults['sessionvars'])

    morevars['revcount'] = revcount * 2

    count = len(web.repo)

    pos = ctx.rev()

    start = max(0, pos - revcount + 1)

    end = min(count, start + revcount)

    pos = end - 1

    parity = paritygen(web.stripecount, offset=start - end)

    changenav = webutil.revnavgen(pos, revcount, count, web.repo.changectx)

    return tmpl(shortlog and 'shortlog' or 'changelog', changenav=changenav,

                node=ctx.hex(), rev=pos, changesets=count,

                entries=lambda **x: changelist(limit=0,**x),

                latestentry=lambda **x: changelist(limit=1,**x),

                archives=web.archivelist("tip"), revcount=revcount,

                morevars=morevars, lessvars=lessvars)

def shortlog(web, req, tmpl):

    return changelog(web, req, tmpl, shortlog = True)

def changeset(web, req, tmpl):

    ctx = webutil.changectx(web.repo, req)

    showtags = webutil.showtag(web.repo, tmpl, 'changesettag', ctx.node())

    showbookmarks = webutil.showbookmark(web.repo, tmpl, 'changesetbookmark',

                                         ctx.node())

    showbranch = webutil.nodebranchnodefault(ctx)

    files = []

    parity = paritygen(web.stripecount)

    for f in ctx.files():

        template = f in ctx and 'filenodelink' or 'filenolink'

        files.append(tmpl(template,

                          node=ctx.hex(), file=f,

                          parity=parity.next()))

    style = web.config('web', 'style', 'paper')

    if 'style' in req.form:

        style = req.form['style'][0]

    parity = paritygen(web.stripecount)

    diffs = webutil.diffs(web.repo, tmpl, ctx, None, parity, style)

    parity = paritygen(web.stripecount)

    diffstatgen = webutil.diffstatgen(ctx)

    diffstat = webutil.diffstat(tmpl, ctx, diffstatgen, parity)

    return tmpl('changeset',

                diff=diffs,

                rev=ctx.rev(),

                node=ctx.hex(),

                parent=webutil.parents(ctx),

                child=webutil.children(ctx),

                changesettag=showtags,

                changesetbookmark=showbookmarks,

                changesetbranch=showbranch,

                author=ctx.user(),

                desc=ctx.description(),

                date=ctx.date(),

                files=files,

                diffsummary=lambda **x: webutil.diffsummary(diffstatgen),

                diffstat=diffstat,

                archives=web.archivelist(ctx.hex()),

                tags=webutil.nodetagsdict(web.repo, ctx.node()),

                bookmarks=webutil.nodebookmarksdict(web.repo, ctx.node()),

                branch=webutil.nodebranchnodefault(ctx),

                inbranch=webutil.nodeinbranch(web.repo, ctx),

                branches=webutil.nodebranchdict(web.repo, ctx))

rev = changeset

def manifest(web, req, tmpl):

    ctx = webutil.changectx(web.repo, req)

    path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])

    mf = ctx.manifest()

    node = ctx.node()

    files = {}

    dirs = {}

    parity = paritygen(web.stripecount)

    if path and path[-1] != "/":

        path += "/"

    l = len(path)

    abspath = "/" + path

    for f, n in mf.iteritems():

        if f[:l] != path:

            continue

        remain = f[l:]

        elements = remain.split('/')

        if len(elements) == 1:

            files[remain] = f

        else:

            h = dirs # need to retain ref to dirs (root)

            for elem in elements[0:-1]:

                if elem not in h:

                    h[elem] = {}

                h = h[elem]

                if len(h) > 1:

                    break

            h[None] = None # denotes files present

    if mf and not files and not dirs:

        raise ErrorResponse(HTTP_NOT_FOUND, 'path not found: ' + path)

    def filelist(**map):

        for f in sorted(files):

            full = files[f]