import sites as sites
import console as console
import os.path
from settings import Settings


def init():
    dbg_lvl = os.getenv('MD_LOGGING', 'ERROR')

    if dbg_lvl.lower() == 'info':
        Settings.Debuglvl = console.DBG_INFO
    else:
        Settings.Debuglvl = console.DBG_ERROR

    Settings.tmpDir = os.path.expanduser(os.getenv('MD_TMP', '/tmp'))

    os.makedirs(Settings.tmpDir, exist_ok=True)

    directory(os.getenv('MD_SAVEDIR', '~/Downloads'))


def main():
    init()

    console.output('Music downloader by Deben Oldert')
    console.output()
    console.output('Download directory: {0}'.format(Settings.SaveDir))
    console.output()
    help()
    console.output()
    console.output('Available sites: {0}'.format(', '.join(list(map(lambda x: x.url, sites.available)))))
    console.output('Selected site is: {0}'.format(sites.available[selected_site].url))
    console.output()

    while True:
        if not idle():
            break

    console.output('Quitting...')
    exit(0)


def choose_site():
    global selected_site
    _index = console.option_picker('Available sites',
                                          list(map(lambda x: x.url, sites.available)),
                                          selected_site,
                                          True)
    if _index is not None:
        selected_site = _index
    return True


def idle():
    _command = console.ask_input('Type command')

    for command in commands:
        if command[0] == _command.lower():
            return command[1]()

    console.output('Command \'{0}\' not found. Type help to see a list of possible commands'.format(_command))
    return True


def help():
    console.output('Possible commands are:')
    for command in commands:
        console.output('{0}\t{1}'.format(command[0], command[2]))
    return True


def search(cache=None):
    if cache is None:
        keywords = console.ask_input('Search for')
        _sites = []
        if isinstance(sites.available[selected_site], sites.DefaultSite):
            _sites = sites.available[1:]
        else:
            _sites = [sites.available[selected_site]]

        items = []
        for site in _sites:
            console.output('Searching: {0}'.format(site.url))
            _items = site.perform_search(keywords)
            console.output('\tFound {0} results'.format(len(_items)))
            items.extend(_items)

        if len(items) == 0:
            console.output('No results found')
            return True

        last(items)
    else:
        items = cache

    while True:
        picked_item = console.option_picker('Pick a song to download',
                                            items,
                                            # list(map(lambda x: '[{0:5}] [{1:4}] {2}'.format(x.duration, x.size, x.title), items)),
                                            quit=True,
                                            objects=[
                                                '__id__',
                                                'x.duration',
                                                'x.size',
                                                'x.artist',
                                                'x.title'
                                            ],
                                            table=[
                                                ('ID', 2),
                                                ('Time', 5),
                                                ('Size', 4),
                                                ('Artist', 50),
                                                ('Title', 100)
                                            ])
        if picked_item is None:
            break
        else:
            item = items[picked_item]
            console.output('Downloading {0}'.format(item.title))

            item.site.download(item)

            break

    return True


def directory(dir=None):
    if dir is None:
        dir = console.ask_input('Enter new save directory')
    Settings.SaveDir = os.path.expanduser(dir)
    os.makedirs(Settings.SaveDir, exist_ok=True)
    console.output('New save directory: {0}'.format(Settings.SaveDir), level=console.DBG_INFO)
    return True


def last(items=None):
    global search_cache
    if items is not None:
        search_cache = items
    else:
        if search_cache is None:
            console.output('First search has yet te be made', console.DBG_ERROR)
        else:
            search(search_cache)
    return True


def quit():
    return False


selected_site = 0
search_cache = None
commands = [
    ('help', help, 'Display this list'),
    ('last', last, 'See the last search'),
    ('save', directory, 'Change the download directory'),
    ('search', search, 'Search the selected site'),
    ('sites', choose_site, 'Pick the site to search'),
    ('quit', quit, 'Quit the program')
]


if __name__ == '__main__':
    main()