#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Started 10/05/2011 by Seblu <seblu@seblu.net>

'''
InstallSystems Image Manipulation Tool
'''

import os
import argparse
import installsystems
from installsystems.printer import *
from installsystems.image import SourceImage

class DebugAction(argparse.Action):
    '''Set installsystems in debug mode. Argparse callback'''
    def __call__(self, parser, namespace, values, option_string=None):
        if installsystems.debug == False:
            installsystems.debug = True
            debug("Debug on")


def init(options):
    '''Create an empty fresh source image tree'''
    # Directory must not exists
    if os.path.exists(options.path) and os.path.isdir(options.path):
        error("Directory already exists: %s" % options.path)
    # Check if parent path is writable
    parent_path = os.path.abspath(os.path.join(options.path, "../"))
    if not os.access(parent_path, os.W_OK):
        error("%s is not writable."%parent_path)
    # call init from library
    try:
        simg = SourceImage.create(options.path, options.verbose)
    except Exception as e:
        error("init failed: %s." % e)

def build(options):
    '''Create a package image'''
    for d in ("", "parser", "setup", "data"):
        rp = os.path.join(options.path, d)
        if not os.path.exists(rp):
            error("Missing directory: %s" % d)
        if not os.path.isdir(rp):
            error("Not a directory: %s" % rp)
        if not os.access(rp, os.R_OK|os.X_OK):
            error("Unable to access to %s" % rp)
    try:
        simg = SourceImage(options.path)
        simg.build()
    except Exception as e:
        error("build failed: %s." % e)

# Top level argument parsing
p_main = argparse.ArgumentParser()
p_main.add_argument("-V", "--version", action="version", version=installsystems.version,
                    help="show installsystems version")
p_main.add_argument('-d', "--debug", action=DebugAction, nargs=0,
                    help="active debug mode")
p_main.add_argument('-q', "--quiet", action="store_false", dest="verbose", default=True,
                    help="active quiet mode")
subparsers = p_main.add_subparsers()
# Init command parser
p_init = subparsers.add_parser("init", help=init.__doc__)
p_init.add_argument("path", help="Path of new image directory")
p_init.set_defaults(func=init)
# Build command parser
p_build =  subparsers.add_parser("build", help=build.__doc__)
p_build.add_argument("path", nargs="?", type=str, default=".")
p_build.set_defaults(func=build)
# Parse and run
args = p_main.parse_args()
args.func(args)