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 a member to a group')
@click.argument('group_name')
@click.argument('username')
@click.option('--no-subscribe', is_flag=True, default=False,
              help='Do not subscribe the member to any auxiliary mailing lists.')
def addmember(group_name, username, no_subscribe):
    click.confirm(f'Are you sure you want to add {username} to {group_name}?',
                  abort=True)
    base_domain = component.getUtility(IConfig).get('base_domain')
    url = f'/api/groups/{group_name}/members/{username}'
    operations = AddMemberToGroupTransaction.operations

    if no_subscribe:
        url += '?subscribe_to_lists=false'
        operations.remove('subscribe_user_to_auxiliary_mailing_lists')
    resp = http_post(url)
    data = handle_stream_response(resp, operations)
    result = data[-1]['result']
    lines = []
    for i, group in enumerate(result['added_to_groups']):
        if i == 0:
            prefix = 'Added to groups'
        else:
            prefix = ''
        lines.append((prefix, group))
    for i, mailing_list in enumerate(result.get('subscribed_to_lists', [])):
        if i == 0:
            prefix = 'Subscribed to lists'
        else:
            prefix = ''
        if '@' not in mailing_list:
            mailing_list += '@' + base_domain
        lines.append((prefix, mailing_list))
    print_colon_kv(lines)


@groups.command(short_help='Remove a member from a group')
@click.argument('group_name')
@click.argument('username')
@click.option('--no-unsubscribe', is_flag=True, default=False,
              help='Do not unsubscribe the member from any auxiliary mailing lists.')
def removemember(group_name, username, no_unsubscribe):
    click.confirm(f'Are you sure you want to remove {username} from {group_name}?',
                  abort=True)
    base_domain = component.getUtility(IConfig).get('base_domain')
    url = f'/api/groups/{group_name}/members/{username}'
    operations = RemoveMemberFromGroupTransaction.operations
    if no_unsubscribe:
        url += '?unsubscribe_from_lists=false'
        operations.remove('unsubscribe_user_from_auxiliary_mailing_lists')
    resp = http_delete(url)
    data = handle_stream_response(resp, operations)
    result = data[-1]['result']
    lines = []
    for i, group in enumerate(result['removed_from_groups']):
        if i == 0:
            prefix = 'Removed from groups'
        else:
            prefix = ''
        lines.append((prefix, group))
    for i, mailing_list in enumerate(result.get('unsubscribed_from_lists', [])):
        if i == 0:
            prefix = 'Unsubscribed from lists'
        else:
            prefix = ''
        if '@' not in mailing_list:
            mailing_list += '@' + base_domain
        lines.append((prefix, mailing_list))
    print_colon_kv(lines)


@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)