import os
import sys

from invoke import Collection, ctask

from . import osx
from . import linux
from .util import DOTFILES_DIRECTORY, RESOURCES_DIRECTORY


ns = Collection()
ns.add_collection(osx)
ns.add_collection(linux)


@ctask(default=True)
def setup(ctx):
    ctx.config['run']['pty'] = False
    ctx.config['run']['warn'] = True
    dotfiles(ctx, 'f')
    if 'darwin' in sys.platform:
        osx.setup(ctx)
    else:
        linux.setup(ctx)
    install_python_libraries(ctx)
    powerline(ctx)
    install_npm_libraries(ctx)
    change_shell(ctx)


@ctask
def dotfiles(ctx, flags=''):
    ctx.run('hash dotfiles || sudo pip install dotfiles')
    return ctx.run('dotfiles -s{1} -R {0}'.format(DOTFILES_DIRECTORY, flags))


@ctask
def dropbox_dotfiles(ctx, flags='f'):
    ctx.run('hash dotfiles || sudo pip install dotfiles')
    ctx.run('dotfiles -s{1} -R {0}'.format(
        os.path.join(
            os.path.expanduser('~'), 'Dropbox', 'configs', 'dotfiles'
        ),
        flags
    ))
    link_dropbox_other(ctx)

@ctask
def powerline(ctx):
    ctx.run('sudo pip install psutil')
    ctx.run('sudo pip install git+git://github.com/Lokaltog/powerline')


@ctask
def install_python_libraries(ctx):
    ctx.run('sudo pip install setuptools --upgrade')
    ctx.run('sudo pip install -r {0}'.format(
        os.path.join(RESOURCES_DIRECTORY, 'requirements.txt')
    ))


@ctask
def install_npm_libraries(ctx):
    ctx.run('source {0}'.format(
        os.path.join(RESOURCES_DIRECTORY, 'npm.sh')
    ))


@ctask
def vimstall(ctx):
    ctx.run('vim +BundleInstall! +q +q')


@ctask
def change_shell(ctx):
    ctx.run('sudo chsh -s $(which zsh) $(whoami)')


@ctask
def link_dropbox_other(ctx):
    link_pairs = (
        ('~/Dropbox/configs/custom.el', '~/.emacs.d/custom.el'),
        ('~/Dropbox/Documents', '~/Documents'),
        ('~/Dropbox/Pictures', '~/Pictures'),
        ('~/Dropbox/org', '~/org')
    )
    for source, destination in link_pairs:
        destination = os.path.expanduser(destination)
        source = os.path.expanduser(source)
        if os.path.exists(destination):
            print("Skipping {0} because path already exists".format(destination))
        else:
            print("Linking {0} to {1}".format(destination, source))
            ctx.run('ln -s {0} {1}'.format(source, destination))


@ctask
def customize_user_settings(ctx):
    input_function = input if sys.version_info.major == 3 else raw_input
    username = input_function("Enter the user's full name: ")
    email = input_function("Enter the user's email address: ")
    with open(os.path.expanduser('~/.gitconfig.custom'), 'w') as custom_file:
        custom_file.write("""[user]
        name = {0}
	email = {1}""".format(username, email))


ns.add_task(change_shell)
ns.add_task(customize_user_settings)
ns.add_task(dotfiles)
ns.add_task(install_npm_libraries)
ns.add_task(install_python_libraries)
ns.add_task(dropbox_dotfiles)
ns.add_task(powerline)
ns.add_task(setup)
ns.add_task(vimstall)