//! # Groups controller
//!
//! @author Pierre Hubert

use std::collections::HashMap;

use crate::api_data::group_api::GroupApi;
use crate::api_data::res_create_group::GroupCreationResult;
use crate::controllers::routes::RequestResult;
use crate::data::group::GroupAccessLevel;
use crate::data::group_id::GroupID;
use crate::data::http_request_handler::HttpRequestHandler;
use crate::data::new_group::NewGroup;
use crate::helpers::groups_helper;
use crate::api_data::advanced_group_api::AdvancedGroupApi;

/// Create a new group
pub fn create(r: &mut HttpRequestHandler) -> RequestResult {
    let new_group = NewGroup {
        name: r.post_string_opt("name", 3, true)?,
        owner_id: r.user_id()?,
    };

    let group_id = groups_helper::create(&new_group)?;

    r.set_response(GroupCreationResult::new(&group_id))
}

/// Get the list of groups of the current user
pub fn get_list_user(r: &mut HttpRequestHandler) -> RequestResult {
    let list = groups_helper::get_list_user(r.user_id()?, false)?
        .iter()
        .map(|f| f.id())
        .collect::<Vec<u64>>();

    r.set_response(list)
}

/// Get information about a single group
pub fn get_info_single(r: &mut HttpRequestHandler) -> RequestResult {
    let group_id = r.post_group_id_with_access("id", GroupAccessLevel::LIMITED_ACCESS)?;
    let group = groups_helper::get_info(&group_id)?;

    r.set_response(GroupApi::new(&group, r.user_id_opt())?)
}

/// Get information about multiple users
pub fn get_info_multiple(r: &mut HttpRequestHandler) -> RequestResult {
    let groups_id = r.post_numbers_list("list", 1)?;

    let mut list = HashMap::new();

    for id in groups_id {
        let id = GroupID::new(id as u64);

        if !groups_helper::exists(&id)? ||
            groups_helper::get_access_level(&id, r.user_id_opt())? < GroupAccessLevel::LIMITED_ACCESS {
            r.not_found(format!("Group {} not found!", id.id()))?;
        }

        let group = groups_helper::get_info(&id)?;

        list.insert(id.id().to_string(), GroupApi::new(&group, r.user_id_opt())?);
    }

    r.set_response(list)
}

/// Get advanced information about a user
pub fn get_advanced_info(r: &mut HttpRequestHandler) -> RequestResult {
    let group_id = r.post_group_id_with_access("id", GroupAccessLevel::VIEW_ACCESS)?;
    let group = groups_helper::get_info(&group_id)?;

    r.set_response(AdvancedGroupApi::new(&group, r.user_id_opt())?)
}