# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from datetime import datetime
import io
import os
import sys

from mozbuild.preprocessor import Preprocessor
import buildconfig


TEMPLATE = '''
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#include<winver.h>

// Note: if you contain versioning information in an included
// RC script, it will be discarded
// Use module.ver to explicitly set these values

// Do not edit this file. Changes won't affect the build.

{include}


/////////////////////////////////////////////////////////////////////////////
//
// Version
//

1 VERSIONINFO
 FILEVERSION    {fileversion}
 PRODUCTVERSION {productversion}
 FILEFLAGSMASK 0x3fL
 FILEFLAGS {fileflags}
 FILEOS VOS__WINDOWS32
 FILETYPE VFT_DLL
 FILESUBTYPE 0x0L
BEGIN
    BLOCK "StringFileInfo"
    BEGIN
        BLOCK "000004b0"
        BEGIN
            VALUE "Comments", "{comment}"
            VALUE "LegalCopyright", "{copyright}"
            VALUE "CompanyName", "{company}"
            VALUE "FileDescription", "{description}"
            VALUE "FileVersion", "{mfversion}"
            VALUE "ProductVersion", "{mpversion}"
            VALUE "InternalName", "{module}"
            VALUE "LegalTrademarks", "{trademarks}"
            VALUE "OriginalFilename", "{binary}"
            VALUE "ProductName", "{productname}"
            VALUE "BuildID", "{buildid}"
        END
    END
    BLOCK "VarFileInfo"
    BEGIN
        VALUE "Translation", 0x0, 1200
    END
END

'''


def preprocess(path, defines):
    pp = Preprocessor(defines=defines, marker='%')
    pp.context.update(defines)
    pp.out = io.StringIO()
    pp.do_filter('substitution')
    pp.do_include(io.open(path, 'r', encoding='latin1'))
    pp.out.seek(0)
    return pp.out


def parse_module_ver(path, defines):
    result = {}
    for line in preprocess(path, defines):
        content, *comment = line.split('#', 1)
        if not content.strip():
            continue
        entry, value = content.split('=', 1)
        result[entry.strip()] = value.strip()
    return result


def get_buildid():
    path = os.path.join(buildconfig.topobjdir, 'buildid.h')
    define, MOZ_BUILDID, buildid = io.open(path, 'r', encoding='utf-8').read().split()
    return buildid


def days_from_2000_to_buildid(buildid):
    start = datetime(2000, 1, 1, 0, 0, 0)
    buildid_time = datetime.strptime(buildid, '%Y%m%d%H%M%S')
    return (buildid_time - start).days


def digits_only(s):
    for l in range(len(s), 0, -1):
        if s[:l].isdigit():
            return s[:l]
    return '0'


def split_and_normalize_version(version, len):
    return ([digits_only(x) for x in version.split('.')] + ['0'] * len)[:len]


def generate_module_rc(binary='', rcinclude=None):
    deps = set()
    buildid = get_buildid()
    milestone = buildconfig.substs['GRE_MILESTONE']
    app_version = buildconfig.substs.get('MOZ_APP_VERSION') or milestone
    app_winversion = ','.join(split_and_normalize_version(app_version, 4))
    milestone_winversion = ','.join(split_and_normalize_version(milestone, 3) +
                                    [str(days_from_2000_to_buildid(buildid))])
    display_name = buildconfig.substs.get('MOZ_APP_DISPLAYNAME', 'Mozilla')

    milestone_string = milestone

    flags = ['0']
    if buildconfig.substs.get('MOZ_DEBUG'):
        flags.append('VS_FF_DEBUG')
        milestone_string += ' Debug'
    if not buildconfig.substs.get('MOZILLA_OFFICIAL'):
        flags.append('VS_FF_PRIVATEBUILD')
    if buildconfig.substs.get('NIGHTLY_BUILD'):
        flags.append('VS_FF_PRERELEASE')

    defines = {
        'MOZ_APP_DISPLAYNAME': display_name,
        'MOZ_APP_VERSION': app_version,
        'MOZ_APP_WINVERSION': app_winversion,
    }

    relobjdir = os.path.relpath('.', buildconfig.topobjdir)
    srcdir = os.path.join(buildconfig.topsrcdir, relobjdir)
    module_ver = os.path.join(srcdir, 'module.ver')
    if os.path.exists(module_ver):
        deps.add(module_ver)
        overrides = parse_module_ver(module_ver, defines)
    else:
        overrides = {}

    if rcinclude:
        include = '// From included resource {}\n{}'.format(
            rcinclude, preprocess(rcinclude, defines).read())
    else:
        include = ''

    data = TEMPLATE.format(
        include=include,
        fileversion=overrides.get('WIN32_MODULE_FILEVERSION', milestone_winversion),
        productversion=overrides.get('WIN32_MODULE_PRODUCTVERSION', milestone_winversion),
        fileflags=' | '.join(flags),
        comment=overrides.get('WIN32_MODULE_COMMENT', ''),
        copyright=overrides.get('WIN32_MODULE_COPYRIGHT', 'License: MPL 2'),
        company=overrides.get('WIN32_MODULE_COMPANYNAME', 'Mozilla Foundation'),
        description=overrides.get('WIN32_MODULE_DESCRIPTION', ''),
        mfversion=overrides.get('WIN32_MODULE_FILEVERSION_STRING', milestone_string),
        mpversion=overrides.get('WIN32_MODULE_PRODUCTVERSION_STRING', milestone_string),
        module=overrides.get('WIN32_MODULE_NAME', ''),
        trademarks=overrides.get('WIN32_MODULE_TRADEMARKS', 'Mozilla'),
        binary=overrides.get('WIN32_MODULE_ORIGINAL_FILENAME', binary),
        productname=overrides.get('WIN32_MODULE_PRODUCTNAME', display_name),
        buildid=buildid,
    )
    with io.open('{}.rc'.format(binary or 'module'), 'w', encoding='latin1') as fh:
        fh.write(data)


if __name__ == '__main__':
    generate_module_rc(*sys.argv[1:])