from typing import Dict

import click
from zope import component

from ..utils import http_post, http_get, http_delete
from .utils import handle_stream_response, handle_sync_response, print_colon_kv, \
    check_if_in_development
from ceo_common.interfaces import IConfig
from ceod.transactions.groups import (
    AddGroupTransaction,
    AddMemberToGroupTransaction,
    RemoveMemberFromGroupTransaction,
    DeleteGroupTransaction,
)


@click.group(short_help='Perform operations on CSC groups/clubs')
def groups():
    pass


@groups.command(short_help='Add a new group')
@click.argument('group_name')
@click.option('-d', '--description', help='Group description', prompt=True)
def add(group_name, description):
    click.echo('The following group will be created:')
    lines = [
        ('cn', group_name),
        ('description', description),
    ]
    print_colon_kv(lines)

    click.confirm('Do you want to continue?', abort=True)

    body = {
        'cn': group_name,
        'description': description,
    }
    operations = AddGroupTransaction.operations
    resp = http_post('/api/groups', json=body)
    data = handle_stream_response(resp, operations)
    result = data[-1]['result']
    print_group_lines(result)


def print_group_lines(result: Dict):
    """Pretty-print a group JSON response."""
    lines = [
        ('cn', result['cn']),
        ('description', result.get('description', 'Unknown')),
        ('gid_number', str(result['gid_number'])),
    ]
    for i, member in enumerate(result['members']):
        if i == 0:
            prefix = 'members'
        else:
            prefix = ''
        lines.append((prefix, member['cn'] + ' (' + member['uid'] + ')'))
    print_colon_kv(lines)


@groups.command(short_help='Get info about a group')
@click.argument('group_name')
def get(group_name):
    resp = http_get('/api/groups/' + group_name)
    result = handle_sync_response(resp)
    print_group_lines(result)


@groups.command(short_help='Add one or more members to a group')
@click.argument('group_name')
@click.argument('username')
@click.argument('usernames', nargs=-1)
@click.option('--no-subscribe', is_flag=True, default=False,
              help='Do not subscribe the member(s) to any auxiliary mailing lists.')
def addmember(group_name, username, usernames, no_subscribe):
    usernames = [username, *usernames]
    if len(usernames) == 1:
        click.confirm(f'Are you sure you want to add {username} to {group_name}?',
                      abort=True)
    else:
        click.echo(f'The following users will be added to {group_name}:')
        click.echo(', '.join(usernames))
        click.confirm('Do you want to continue?', abort=True)
    base_domain = component.getUtility(IConfig).get('base_domain')
    operations = AddMemberToGroupTransaction.operations
    if no_subscribe:
        operations.remove('subscribe_user_to_auxiliary_mailing_lists')
    for username in usernames:
        url = f'/api/groups/{group_name}/members/{username}'
        if no_subscribe:
            url += '?subscribe_to_lists=false'
        resp = http_post(url)
        data = handle_stream_response(resp, operations)
        result = data[-1]['result']
        click.echo(f'Added {username} to ' + ', '.join(result['added_to_groups']))
        if result.get('subscribed_to_lists'):
            mailing_lists = [
                mailing_list + '@' + base_domain
                if '@' not in mailing_list
                else mailing_list
                for mailing_list in result['subscribed_to_lists']
            ]
            click.echo(f'Subscribed {username} to ' + ', '.join(mailing_lists))


@groups.command(short_help='Remove one or more members from a group')
@click.argument('group_name')
@click.argument('username')
@click.argument('usernames', nargs=-1)
@click.option('--no-unsubscribe', is_flag=True, default=False,
              help='Do not unsubscribe the member(s) from any auxiliary mailing lists.')
def removemember(group_name, username, usernames, no_unsubscribe):
    usernames = [username, *usernames]
    if len(usernames) == 1:
        click.confirm(f'Are you sure you want to remove {username} from {group_name}?',
                      abort=True)
    else:
        click.echo(f'The following users will be removed from {group_name}:')
        click.echo(', '.join(usernames))
        click.confirm('Do you want to continue?', abort=True)
    base_domain = component.getUtility(IConfig).get('base_domain')
    operations = RemoveMemberFromGroupTransaction.operations
    if no_unsubscribe:
        operations.remove('unsubscribe_user_from_auxiliary_mailing_lists')
    for username in usernames:
        url = f'/api/groups/{group_name}/members/{username}'
        if no_unsubscribe:
            url += '?unsubscribe_from_lists=false'
        resp = http_delete(url)
        data = handle_stream_response(resp, operations)
        result = data[-1]['result']
        click.echo(f'Removed {username} from ' + ', '.join(result['removed_from_groups']))
        if result.get('unsubscribed_from_lists'):
            mailing_lists = [
                mailing_list + '@' + base_domain
                if '@' not in mailing_list
                else mailing_list
                for mailing_list in result['unsubscribed_from_lists']
            ]
            click.echo(f'Unsubscribed {username} from ' + ', '.join(mailing_lists))


@groups.command(short_help='Delete a group')
@click.argument('group_name')
def delete(group_name):
    check_if_in_development()
    click.confirm(f"Are you sure you want to delete {group_name}?", abort=True)
    resp = http_delete(f'/api/groups/{group_name}')
    handle_stream_response(resp, DeleteGroupTransaction.operations)


@groups.command(short_help='Search for groups')
@click.argument('query')
@click.option('--count', default=10, help='number of results to show')
def search(query, count):
    check_if_in_development()
    resp = http_get(f'/api/groups/search/{query}/{count}')
    result = handle_sync_response(resp)
    for cn in result:
        if cn != "":
            click.echo(cn)