#!/usr/bin/env python3
# encoding: utf-8
# === This file is part of Calamares - <http://github.com/calamares> ===
#
# Copyright 2014, Philip Müller <philm@manjaro.org>
#
# Calamares is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Calamares is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Calamares. If not, see <http://www.gnu.org/licenses/>.

import libcalamares
import os


def modify_grub_default(partitions, root_mount_point, distributor):

    default_dir = os.path.join(root_mount_point, "etc/default")
    default_grub = os.path.join(default_dir, "grub")
    plymouth_bin = os.path.join(root_mount_point, "usr/bin/plymouth")
    use_splash = ''

    if os.path.exists(plymouth_bin):
        use_splash = 'splash'

    swap_uuid = ""
    for partition in partitions:
        if partition["fs"] == "linuxswap":
            swap_uuid = partition["uuid"]

    if swap_uuid != "":
        kernel_cmd = 'GRUB_CMDLINE_LINUX_DEFAULT="resume=UUID=%s quiet %s"' % (swap_uuid, use_splash)
    else:
        kernel_cmd = 'GRUB_CMDLINE_LINUX_DEFAULT="quiet %s"' % use_splash

    if not os.path.exists(default_dir):
        os.mkdir(default_dir)

    with open(default_grub, 'r') as grub_file:
        lines = [x.strip() for x in grub_file.readlines()]

    for i in range(len(lines)):
        if lines[i].startswith("#GRUB_CMDLINE_LINUX_DEFAULT"):
            lines[i] = kernel_cmd
        elif lines[i].startswith("GRUB_CMDLINE_LINUX_DEFAULT"):
            lines[i] = kernel_cmd
        elif lines[i].startswith("#GRUB_DISTRIBUTOR") or lines[i].startswith("GRUB_DISTRIBUTOR"):
            lines[i] = "GRUB_DISTRIBUTOR=%s" % distributor

    with open(default_grub, 'w') as grub_file:
        grub_file.write("\n".join(lines) + "\n")


def run():
    partitions = libcalamares.globalstorage.value("partitions")
    root_mount_point = libcalamares.globalstorage.value("rootMountPoint")
    distributor = libcalamares.job.configuration["distributor"]
    modify_grub_default(partitions, root_mount_point, distributor)
    return None