import re
import subprocess
from typing import List

from fpakman.core import system


def app_str_to_json(line: str, version: str) -> dict:

    app_array = line.split('\t')

    if version >= '1.3.0':
        app = {'name': app_array[0],
               'id': app_array[1],
               'version': app_array[2],
               'branch': app_array[3]}
    elif '1.0' <= version < '1.1':
        app = {'ref': app_array[0], 'options': app_array[1]}

        ref_data = app['ref'].split('/')
        app['id'] = ref_data[0]
        app['arch'] = ref_data[1]
        app['branch'] = ref_data[2]
        app['name'] = ref_data[0].split('.')[-1]
        app['version'] = None
    elif '1.2' <= version < '1.3':
        app = {'name': app_array[1].strip().split('.')[-1],
               'id': app_array[1],
               'version': app_array[2],
               'branch': app_array[3],
               'arch': app_array[4],
               'origin': app_array[5]}
    else:
        raise Exception('Unsupported version')

    extra_fields = get_app_info_fields(app['id'], app['branch'], ['origin', 'arch', 'ref', 'commit'], check_runtime=True)
    app.update(extra_fields)

    return app


def get_app_info_fields(app_id: str, branch: str, fields: List[str], check_runtime: bool = False):
    info = re.findall(r'\w+:\s.+', get_app_info(app_id, branch))
    data = {}
    fields_to_retrieve = len(fields) + (1 if check_runtime and 'ref' not in fields else 0)

    for field in info:

        if fields_to_retrieve == 0:
            break

        field_val = field.split(':')
        field_name = field_val[0].lower()

        if field_name in fields or (check_runtime and field_name == 'ref'):
            data[field_name] = field_val[1].strip()
            fields_to_retrieve -= 1

        if check_runtime and field_name == 'ref':
            data['runtime'] = data['ref'].startswith('runtime/')

    return data


def get_version():
    res = system.run_cmd('flatpak --version')
    return res.split(' ')[1].strip() if res else None


def get_app_info(app_id: str, branch: str):
    return system.run_cmd('flatpak info {} {}'.format(app_id, branch))


def list_installed() -> List[dict]:
    apps_str = system.run_cmd('flatpak list')

    if apps_str:
        version = get_version()
        app_lines = apps_str.split('\n')
        return [app_str_to_json(line, version) for line in app_lines if line]

    return []


def update(app_ref: str) -> bool:
    return bool(system.run_cmd('flatpak update -y ' + app_ref))


def update_and_stream(app_ref: str):
    """
    Updates the app reference and streams Flatpak output,
    :param app_ref:
    :return:
    """
    return system.stream_cmd(['flatpak', 'update', '-y', app_ref])


def uninstall_and_stream(app_ref: str):
    """
    Removes the app by its reference
    :param app_ref:
    :return:
    """
    return system.stream_cmd(['flatpak', 'uninstall', app_ref, '-y'])


def list_updates_as_str():
    return system.run_cmd('flatpak update', ignore_return_code=True)


def downgrade_and_stream(app_ref: str, commit: str, root_password: str):

    pwdin, downgrade_cmd = None, []

    if root_password is not None:
        downgrade_cmd.extend(['sudo', '-S'])
        pwdin = subprocess.Popen(['echo', root_password], stdout=subprocess.PIPE).stdout

    downgrade_cmd.extend(['flatpak', 'update', '--commit={}'.format(commit), app_ref, '-y'])
    return subprocess.Popen(downgrade_cmd, stdin=pwdin, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL).stdout


def get_app_commits(app_ref: str, origin: str) -> List[str]:
    log = system.run_cmd('flatpak remote-info --log {} {}'.format(origin, app_ref))
    return re.findall(r'Commit+:\s(.+)', log)