import re
import distutils.version
import os

from wizard import app, install, resolve, shell, util
from wizard.app import php

def make_filename_regex(var):
    return 'LocalSettings.php', re.compile('^(\$' + app.expand_re(var) + r'''\s*=\s*)(.*)(;)''', re.M)

seed = util.dictmap(make_filename_regex, {
        'WIZARD_IP': 'IP', # obsolete, remove after we're done
        'WIZARD_SITENAME': 'wgSitename',
        'WIZARD_SCRIPTPATH': 'wgScriptPath',
        'WIZARD_EMERGENCYCONTACT': ('wgEmergencyContact', 'wgPasswordSender'),
        'WIZARD_DBSERVER': 'wgDBserver',
        'WIZARD_DBNAME': 'wgDBname',
        'WIZARD_DBUSER': 'wgDBuser',
        'WIZARD_DBPASSWORD': 'wgDBpassword',
        'WIZARD_SECRETKEY': ('wgSecretKey', 'wgProxyKey'),
        })

class Application(app.Application):
    parametrized_files = ['LocalSettings.php', 'php.ini']
    deprecated_keys = set(['WIZARD_IP']) | php.deprecated_keys
    extractors = app.make_extractors(seed)
    extractors.update(php.extractors)
    substitutions = app.make_substitutions(seed)
    substitutions.update(php.substitutions)
    install_schema = install.ArgSchema("mysql", "admin", "email")
    install_schema.add(install.Arg("title", help="Title of your new MediaWiki install"))
    def checkConfig(self, deployment):
        return os.path.isfile(os.path.join(deployment.location, "LocalSettings.php"))
    def detectVersion(self, deployment):
        contents = deployment.read("includes/DefaultSettings.php")
        regex = make_filename_regex("wgVersion")[1]
        match = regex.search(contents)
        if not match: return None
        return distutils.version.LooseVersion(match.group(2)[1:-1])
    def checkWeb(self, deployment, out=None):
        page = deployment.fetch("/index.php?title=Main_Page")
        if type(out) is list:
            out.append(page)
        return page.find("<!-- Served") != -1
    def prepareMerge(self, deployment):
        resolve.fix_newlines("LocalSettings.php")
    def install(self, version, options):
        try:
            os.unlink("LocalSettings.php")
        except OSError:
            pass

        os.chmod("config", 0777) # XXX: vaguely sketchy

        postdata = {
            'Sitename': options.title,
            'EmergencyContact': options.email,
            'LanguageCode': 'en',
            'DBserver': options.mysql_host,
            'DBname': options.mysql_db,
            'DBuser': options.mysql_user,
            'DBpassword': options.mysql_password,
            'DBpassword2': options.mysql_password,
            'defaultEmail': options.email,
            'SysopName': options.admin_name,
            'SysopPass': options.admin_password,
            'SysopPass2': options.admin_password,
            }
        result = install.fetch(options, '/config/index.php', post=postdata)
        if options.verbose or options.debug: print result
        if result.find("Installation successful") == -1:
            raise install.Failure()
        os.rename('config/LocalSettings.php', 'LocalSettings.php')
    def upgrade(self, d, version, options):
        sh = shell.Shell()
        if not os.path.isfile("AdminSettings.php"):
            sh.call("git", "checkout", "-q", "mediawiki-" + str(version), "--", "AdminSettings.php")
        try:
            result = sh.eval("php", "maintenance/update.php", "--quick", log=True)
        except shell.CallError as e:
            raise app.UpgradeFailure("Update script returned non-zero exit code\nSTDOUT: %s\nSTDERR: %s" % (e.stdout, e.stderr))
        results = result.rstrip().split()
        if not results or not results[-1] == "Done.":
            raise app.UpgradeFailure(result)
    def backup(self, deployment, backup_dir, options):
        app.backup_database(backup_dir, deployment)
    def restore(self, deployment, backup_dir, options):
        app.restore_database(backup_dir, deployment)

Application.resolutions = {
'LocalSettings.php': [
    ("""
<<<<<<<
***1***
=======
## The URL base path to the directory containing the wiki;
## defaults for all runtime URL paths are based off of this.
## For more information on customizing the URLs please see:
## http://www.mediawiki.org/wiki/Manual:Short_URL
***2***
$wgScriptExtension  = ".php";

## UPO means: this is also a user preference option
>>>>>>>
""", [-1]),
    ("""
<<<<<<<
***1***
=======

# MySQL specific settings
$wgDBprefix         = "";
>>>>>>>
""", ["\n# MySQL specific settings", 1]),
    ("""
<<<<<<<
## is writable, then uncomment this:
***1***
=======
## is writable, then set this to true:
$wgEnableUploads       = false;
>>>>>>>
""", [-1]),
    ("""
<<<<<<<
***1***
$wgMathPath         = "{$wgUploadPath}/math";
$wgMathDirectory    = "{$wgUploadDirectory}/math";
$wgTmpDirectory     = "{$wgUploadDirectory}/tmp";
=======
$wgUseTeX           = false;
>>>>>>>
""", [1]),
    # order of these rules is important
    ("""
<<<<<<<
$configdate = gmdate( 'YmdHis', @filemtime( __FILE__ ) );
$wgCacheEpoch = max( $wgCacheEpoch, $configdate );
***1***
?>
=======
$wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', @filemtime( __FILE__ ) ) );
>>>>>>>
""", [0, 1]),
    ("""
<<<<<<<
$configdate = gmdate( 'YmdHis', @filemtime( __FILE__ ) );
$wgCacheEpoch = max( $wgCacheEpoch, $configdate );
***1***
=======
$wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', @filemtime( __FILE__ ) ) );
>>>>>>>
""", [0, 1]),
    ("""
<<<<<<<
?>
=======
# When you make changes to this configuration file, this will make
# sure that cached pages are cleared.
$wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', @filemtime( __FILE__ ) ) );
>>>>>>>
""", [0]),
    ("""
<<<<<<<
***1***
?>
=======
# When you make changes to this configuration file, this will make
# sure that cached pages are cleared.
$wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', @filemtime( __FILE__ ) ) );
>>>>>>>
""", [1, 0]),
    ("""
<<<<<<<
***1***
=======
# When you make changes to this configuration file, this will make
# sure that cached pages are cleared.
$wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', @filemtime( __FILE__ ) ) );
>>>>>>>
""", [1, 0]),
    ]
}