import os
import sys
import distutils

import wizard
from wizard import app, command, git, shell, util
from wizard.install import installopt

def main(argv, baton):
    old_options, args = parse_args(argv, baton)
    # XXX: do something smart if -scripts is not at the end
    appstr = args[0]
    dir = args[1]
    if os.path.exists(dir):
        raise DirectoryExistsError
    appname, _, version = appstr.partition('-')
    application = app.applications()[appname]

    # get configuration
    schema = application.install_schema
    handler = installopt.Controller(schema)
    parser = command.WizardOptionParser()
    handler.push(parser)
    options, _ = parser.parse_all(args[2:] + command.make_base_args(old_options)) # accumulate
    handler.handle(options)

    sh = shell.Shell()
    sys.stderr.write("Copying files...\n")
    sh.call("git", "clone", "-q", "--shared", application.repository(old_options.srv_path), dir)
    with util.ChangeDirectory(dir):
        if version:
            sh.call("git", "reset", "-q", "--hard", appstr)
        sys.stderr.write("Installing...\n")
        application.install(distutils.version.LooseVersion(version), options)
        git.commit_configure()

def parse_args(argv, baton):
    usage = """usage: %prog install [APP [DIR -- [SETUPARGS]]]

Autoinstalls the application APP in the directory
DIR.  SETUPARGS are arguments that are passed to
'wizard configure', see 'wizard configure APP --help'
for possible arguments.

WARNING: This command's API may change."""
    parser = command.WizardOptionParser(usage)
    baton.push(parser, "srv_path")
    options, args = parser.parse_all(argv)
    # XXX: in the future, not specifying stuff is supported, since
    # we'll prompt for it interactively
    if not args:
        parser.error("must specify application and directory")
    elif len(args) == 1:
        parser.error("must specify directory")
    return options, args

class DirectoryExistsError(wizard.Error):
    def __str__(self):
        return "Directory already exists"