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

use std::collections::HashMap;

use crate::api_data::advanced_group_api::AdvancedGroupApi;
use crate::api_data::group_api::GroupApi;
use crate::api_data::res_create_group::GroupCreationResult;
use crate::controllers::routes::RequestResult;
use crate::data::group::{Group, GroupAccessLevel, GroupPostsCreationLevel, GroupRegistrationLevel, GroupVisibilityLevel};
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::helpers::virtual_directory_helper::VirtualDirType;

/// 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())?)
}

/// Get the settings of the group
pub fn get_settings(r: &mut HttpRequestHandler) -> RequestResult {
    let group_id = r.post_group_id_with_access("id", GroupAccessLevel::ADMIN_ACCESS)?;
    let group = groups_helper::get_info(&group_id)?;

    // For now, this method is the same as the get advanced info method,
    // but this might change in the future...
    r.set_response(AdvancedGroupApi::new(&group, r.user_id_opt())?)
}

/// Set new settings to the group
pub fn set_settings(r: &mut HttpRequestHandler) -> RequestResult {
    let group_id = r.post_group_id_with_access("id", GroupAccessLevel::ADMIN_ACCESS)?;

    let new_settings = Group {
        id: group_id.clone(),
        name: r.post_string_without_html("name", 3, true)?,
        visibility: GroupVisibilityLevel::from_api(&r.post_string("visibility")?),
        registration_level: GroupRegistrationLevel::from_api(&r.post_string("registration_level")?),
        posts_creation_level: GroupPostsCreationLevel::from_api(&r.post_string("posts_level")?),
        logo: None,
        virtual_directory: r.post_checked_virtual_directory_opt("virtual_directory", group_id.id(), VirtualDirType::GROUP)?,
        time_create: 0,
        description: r.post_string_without_html_opt("description", 0)?,
        url: r.post_url_opt("url", false)?,
    };

    println!("New settings: {:#?}", new_settings);

    r.success("complete implementation")
}