import dataclasses
from dataclasses import dataclass, field
from typing import List, Tuple

from ansible_collections.finallycoffee.proxmox.plugins.module_utils.common import _proxmox_request, ProxmoxAuthInfo


@dataclass(frozen=True)
class ProxmoxACL:
    path: str
    role: str
    propagate: bool = True
    user: str = None
    group: str = None
    token: str = None


def get_acls(auth_info: ProxmoxAuthInfo) -> List['ProxmoxACL']:
    acl_answer = _proxmox_request('get', '/access/acl', auth_info).json()
    return list(map(
        lambda r: ProxmoxACL(r['path'], r['roleid'], r['propagate'],
                             (r['ugid'] if (r['type'] == 'user') else None),
                             (r['ugid'] if (r['type'] == 'group') else None),
                             (r['ugid'] if (r['type'] == 'token') else None)),
        acl_answer['data']
    ))


def set_acl(auth_info: ProxmoxAuthInfo, acl: ProxmoxACL, dry_run: bool, state: str = 'present') -> Tuple[dict, dict]:
    existing_acls = get_acls(auth_info)
    # find existing acl matching the specified one
    try:
        existing_acl = [x for x in existing_acls if x == acl][0]
    except:
        existing_acl = None

    if state == 'present':
        acl_spec = _acl_to_dict(acl) | {
            'propagate': "1" if acl.propagate else "0"
        }
        if not dry_run:
            acl_res = _proxmox_request('put', '/access/acl', auth_info, data=acl_spec)
            acl_res.raise_for_status()
            if acl_res.ok:
                new_acl = acl
        else:
            new_acl = acl
    elif state == 'exact':
        # Also match on propagate and remove ACLs which match in all fields except propagation
        pass
    else:
        # ACL to be removed
        if not dry_run:
            acl_spec = _acl_to_dict(acl) | {
                'delete': 1
            }
            acl_res = _proxmox_request('put', '/access/acl', auth_info, data=acl_spec)
            acl_res.raise_for_status()
            if acl_res.ok:
                new_acl = None
        else:
            new_acl = None
    return dataclasses.asdict(existing_acl) if existing_acl else None, dataclasses.asdict(new_acl) if new_acl else None


def _acl_to_dict(acl: ProxmoxACL) -> dict:
    acl_spec = {
        'path': acl.path,
        'roles': acl.role,
    }
    if acl.user:
        acl_spec['users'] = acl.user
    if acl.group:
        acl_spec['groups'] = acl.group
    if acl.token:
        acl_spec['tokens'] = acl.token
    return acl_spec