// zotapi - Rust wrapper for Sot API as implemented by Hubzilla
// Copyright (C) 2018  Harald Eilertsen <haraldei@anduin.net>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

use crate::{client::Client, error::Error};
use serde::Serialize;

pub struct Group;

pub fn group() -> Group {
    Group {}
}

impl Group {
    pub async fn fetch(&self, client: &Client) -> Result<String, Error> {
        client.fetch_stream("group", &()).await
    }
}

#[derive(Debug, Serialize)]
enum GroupSelector<'a> {
    #[serde(rename(serialize = "group_id"))]
    Id(u64),

    #[serde(rename(serialize = "group_name"))]
    Name(&'a str),
}

pub struct GroupMembers<'a> {
    id: Option<GroupSelector<'a>>,
}

pub fn group_members<'a>() -> GroupMembers<'a> {
    GroupMembers { id: None }
}

impl<'a> GroupMembers<'a> {
    pub fn by_group_id(&mut self, id: u64) -> &GroupMembers<'a> {
        self.id = Some(GroupSelector::Id(id));
        self
    }

    pub fn by_group_name(&mut self, name: &'a str) -> &GroupMembers<'a> {
        self.id = Some(GroupSelector::Name(name));
        self
    }

    pub async fn fetch(&self, client: &Client) -> Result<String, Error> {
        client.fetch_stream("group_members", &self.id.as_ref().unwrap()).await
    }
}