// SPDX-FileCopyrightText: 2021 - 2022 Samuel W. Flint <swflint@flintfam.org>
//
// SPDX-License-Identifier: GPL-3.0-or-later

use serde::{Deserialize, Serialize};
use std::fmt;
use std::collections::BTreeSet;

use crate::lib::config::Config;

#[derive(Serialize, Deserialize)]
pub struct Group {
    #[serde(default)]
    name: String,
    #[serde(default)]
    pub actions_after: Vec<String>,
    #[serde(default)]
    pub members: BTreeSet<String>,
}

pub fn add(config: &mut Config, name: &String) {
    let group = Group {
        name: name.to_string(),
        actions_after: Vec::new(),
        members: BTreeSet::new()
    };
    config.groups.insert(name.to_string(), group);
    config.is_changed = true;
}

pub fn add_repo(config: &mut Config, name: &String, repo: &String) {
    match config.groups.get_mut(&name.to_string()) {
        Some(group) => {
            match config.repositories.get(&repo.to_string()) {
                Some(_) => {
                    group.members.insert(repo.to_string());
                    config.is_changed = true;
                },
                None => panic!("No known repository named \"{}\".", repo)
            }
        },
        None => panic!("No known group named \"{}\".", name)
    }
}

pub fn add_action(config: &mut Config, name: &String, action: &String) {
    match config.groups.get_mut(&name.to_string()) {
        Some(group) => {
            match config.actions.get(&action.to_string()) {
                Some(_) => {
                    group.actions_after.push(action.to_string());
                    config.is_changed = true;
                },
                None => panic!("No known action named \"{}\".", action)
            }
        },
        None => panic!("No known group named \"{}\".", name)
    }
}

pub fn remove_repo(config: &mut Config, name: &String, repo: &String) {
    match config.groups.get_mut(&name.to_string()) {
        Some(group) => {
            group.members.remove(repo);
            config.is_changed = true;
        }
        None => panic!("No known group named \"{}\".", name)
    }
}

pub fn remove_repo_from_groups(config: &mut Config, repo: &String) {
    // let ref tmp_groups = &config.groups;
    for (_group_name, group) in &mut config.groups {
        group.members.remove(repo);
    }
}

pub fn remove_group(config: &mut Config, name: &String) {
    config.groups.remove(&name.to_string());
    config.is_changed = true;
    for (_name, group) in &mut config.groups {
        group.members.remove(name);
    }
}

impl fmt::Display for Group {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "Group {}:\n\tRepos:\n", self.name)?;
        for repo in &self.members {
            write!(f, "\t\t - {}\n", repo)?;
        }
        write!(f, "\tActions\n")?;
        for action in &self.actions_after {
            write!(f, "\t\t - {}\n", action)?;
        }
        write!(f, "")
    }
}