import sys
from typing import Dict

import click
from zope import component

from ..term_utils import get_terms_for_new_user, get_terms_for_renewal
from ..utils import http_post, http_get, http_patch, http_delete, \
    get_failed_operations, user_dict_lines, get_adduser_operations
from .utils import handle_stream_response, handle_sync_response, print_lines, \
    check_if_in_development
from ceo_common.interfaces import IConfig
from ceod.transactions.members import DeleteMemberTransaction


@click.group(short_help='Perform operations on CSC members and club reps')
def members():
    pass


@members.command(short_help='Add a new member or club rep')
@click.argument('username')
@click.option('--cn', help='Full name', required=False)
@click.option('--given-name', help='First name', required=False)
@click.option('--sn', help='Last name', required=False)
@click.option('--program', required=False, help='Academic program')
@click.option('--terms', 'num_terms', type=click.IntRange(1, 100),
              help='Number of terms to add', default=1)
@click.option('--clubrep', is_flag=True, default=False,
              help='Add non-member terms instead of member terms')
@click.option('--forwarding-address', required=False,
              help=('Forwarding address to set in ~/.forward. '
                    'Default is UW address. '
                    'Set to the empty string to disable forwarding.'))
def add(username, cn, given_name, sn, program, num_terms, clubrep, forwarding_address):
    cfg = component.getUtility(IConfig)
    uw_domain = cfg.get('uw_domain')

    # Try to get info from UWLDAP
    resp = http_get('/api/uwldap/' + username)
    if resp.ok:
        result = handle_sync_response(resp)
        if cn is None and result.get('cn'):
            cn = result['cn']
        if given_name is None and result.get('given_name'):
            given_name = result['given_name']
        if sn is None and result.get('sn'):
            sn = result['sn']
        if program is None and result.get('program'):
            program = result['program']
        if forwarding_address is None:
            forwarding_address = result['mail_local_addresses'][0]
    if cn is None:
        cn = click.prompt('Full name')
    if given_name is None:
        given_name = click.prompt('First name')
    if sn is None:
        sn = click.prompt('Last name')
    if forwarding_address is None:
        forwarding_address = username + '@' + uw_domain

    terms = get_terms_for_new_user(num_terms)

    body = {
        'uid': username,
        'cn': cn,
        'given_name': given_name,
        'sn': sn,
    }
    if program is not None:
        body['program'] = program
    if clubrep:
        body['non_member_terms'] = terms
    else:
        body['terms'] = terms
    if forwarding_address != '':
        body['forwarding_addresses'] = [forwarding_address]
    else:
        body['forwarding_addresses'] = []

    click.echo("The following user will be created:")
    print_user_lines(body)
    click.confirm('Do you want to continue?', abort=True)

    operations = get_adduser_operations(body)

    resp = http_post('/api/members', json=body)
    data = handle_stream_response(resp, operations)
    result = data[-1]['result']
    print_user_lines(result)

    failed_operations = get_failed_operations(data)
    if 'send_welcome_message' in failed_operations:
        click.echo(click.style(
            'Warning: welcome message was not sent. You now need to manually '
            'send the user their password.', fg='yellow'))


def print_user_lines(d: Dict):
    """Pretty-print a serialized User."""
    print_lines(user_dict_lines(d))


@members.command(short_help='Get info about a user')
@click.argument('username')
def get(username):
    resp = http_get('/api/members/' + username)
    result = handle_sync_response(resp)
    print_user_lines(result)


@members.command(short_help="Replace a user's login shell or forwarding addresses")
@click.argument('username')
@click.option('--login-shell', required=False, help='Login shell')
@click.option('--forwarding-addresses', required=False,
              help=(
                  'Comma-separated list of forwarding addresses. '
                  'Set to the empty string to disable forwarding.'
              ))
def modify(username, login_shell, forwarding_addresses):
    if login_shell is None and forwarding_addresses is None:
        click.echo('Nothing to do.')
        sys.exit()
    operations = []
    body = {}
    if login_shell is not None:
        body['login_shell'] = login_shell
        operations.append('replace_login_shell')
        click.echo('Login shell will be set to: ' + login_shell)
    if forwarding_addresses is not None:
        if forwarding_addresses == '':
            forwarding_addresses = []
        else:
            forwarding_addresses = forwarding_addresses.split(',')
        body['forwarding_addresses'] = forwarding_addresses
        operations.append('replace_forwarding_addresses')
        prefix = '~/.forward will be set to:  '
        if len(forwarding_addresses) > 0:
            click.echo(prefix + forwarding_addresses[0])
            for address in forwarding_addresses[1:]:
                click.echo((' ' * len(prefix)) + address)
        else:
            click.echo(prefix)

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

    resp = http_patch('/api/members/' + username, json=body)
    handle_stream_response(resp, operations)


@members.command(short_help="Renew a member or club rep's membership")
@click.argument('username')
@click.option('--terms', 'num_terms', type=click.IntRange(1, 100),
              help='Number of terms to add', prompt='Number of terms')
@click.option('--clubrep', is_flag=True, default=False,
              help='Add non-member terms instead of member terms')
def renew(username, num_terms, clubrep):
    terms = get_terms_for_renewal(username, num_terms, clubrep)

    if clubrep:
        body = {'non_member_terms': terms}
        click.echo('The following non-member terms will be added: ' + ','.join(terms))
    else:
        body = {'terms': terms}
        click.echo('The following member terms will be added: ' + ','.join(terms))

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

    resp = http_post(f'/api/members/{username}/renew', json=body)
    handle_sync_response(resp)
    click.echo('Done.')


@members.command(short_help="Reset a user's password")
@click.argument('username')
def pwreset(username):
    click.confirm(f"Are you sure you want to reset {username}'s password?", abort=True)
    resp = http_post(f'/api/members/{username}/pwreset')
    result = handle_sync_response(resp)
    click.echo('New password: ' + result['password'])


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


@members.command(short_help="Check for and mark expired members")
@click.option('--dry-run', is_flag=True, default=False)
def expire(dry_run):
    resp = http_post(f'/api/members/expire?dry_run={dry_run and "yes" or "no"}')
    result = handle_sync_response(resp)

    if len(result) > 0:
        if dry_run:
            click.echo("The following members will be marked as expired:")
        else:
            click.echo("The following members has been marked as expired:")
        for username in result:
            click.echo(username)