mod api;
mod args;
mod config;
mod ui;

use api::{ProjectID, VikunjaAPI};

// todo : error handling
// todo : task relations
// todo : task comments

fn main() {
    let arg = args::get_args();
    let config_path = dirs::home_dir().unwrap().join(".config").join("vk.toml");

    if let Some(("login", login_arg)) = arg.subcommand() {
        let username: &String = login_arg.get_one("username").unwrap();
        let password: &String = login_arg.get_one("password").unwrap();
        let totp: Option<&String> = login_arg.get_one("totp");
        let host: &String = login_arg.get_one("host").unwrap();

        let host = if host.starts_with("http") {
            host.to_string()
        } else {
            format!("https://{host}")
        };

        let api = VikunjaAPI::new(&host, "");

        let token = api.login(username, password, totp.map(|x| x.as_str()));
        let config = format!("host = \"{host}\"\ntoken = \"{token}\"");

        std::fs::write(config_path, config).unwrap();
        std::process::exit(0);
    }

    let content = &std::fs::read_to_string(config_path).unwrap_or_else(|e| {
        ui::print_color(
            crossterm::style::Color::Red,
            &format!("Could not read config file: {e}"),
        );
        println!("\nTo setup vk run `vk login --help`");
        std::process::exit(1);
    });

    let config: config::Config = toml::from_str(content).unwrap();
    let api = VikunjaAPI::new(&config.host, &config.token);

    match arg.subcommand() {
        Some(("info", task_info_arg)) => {
            let task_id: &String = task_info_arg.get_one("task_id").unwrap();
            ui::task::print_task_info(task_id.parse().unwrap(), &api);
        }
        Some(("prj", prj_arg)) => match prj_arg.subcommand() {
            Some(("ls", _)) => {
                ui::project::list_projects(&api);
            }
            Some(("add", add_prj_arg)) => {
                let title: &String = add_prj_arg.get_one("title").unwrap();
                let description: Option<&String> = add_prj_arg.get_one("description");
                let color: Option<&String> = add_prj_arg.get_one("color");
                let parent: Option<&String> = add_prj_arg.get_one("parent");
                api.new_project(
                    title,
                    description.map(|x| x.as_str()),
                    color.map(|x| x.as_str()),
                    parent.map(|x| ProjectID::parse(&api, x).unwrap()),
                );
            }
            Some(("rm", rm_prj_arg)) => {
                let prj: &String = rm_prj_arg.get_one("project").unwrap();
                api.delete_project(ProjectID::parse(&api, prj).unwrap());
            }
            _ => {
                ui::project::list_projects(&api);
            }
        },
        Some(("rm", rm_args)) => {
            let task_id: &String = rm_args.get_one("task_id").unwrap();
            api.delete_task(task_id.parse().unwrap());
        }
        Some(("assign", assign_arg)) => {
            let user: &String = assign_arg.get_one("user").unwrap();
            let task_id: &String = assign_arg.get_one("task_id").unwrap();
            let undo = assign_arg.get_flag("undo");

            if undo {
                api.remove_assign_to_task(user, task_id.parse().unwrap());
            } else {
                api.assign_to_task(user, task_id.parse().unwrap());
            }
        }
        Some(("comments", c_arg)) => {
            let task_id: &String = c_arg.get_one("task_id").unwrap();
            let comments = api.get_task_comments(task_id.parse().unwrap());

            for comment in comments {
                ui::task::print_comment(&comment);
            }
        }
        Some(("labels", label_args)) => match label_args.subcommand() {
            Some(("rm", rm_label_arg)) => {
                let title: &String = rm_label_arg.get_one("title").unwrap();

                api.remove_label(title);
            }
            Some(("new", new_label_arg)) => {
                let description: Option<&String> = new_label_arg.get_one("description");
                let color: Option<&String> = new_label_arg.get_one("color");
                let title: &String = new_label_arg.get_one("title").unwrap();

                api.new_label(
                    title.as_str(),
                    description.map(|x| x.as_str()),
                    color.map(|x| x.as_str()),
                );
            }
            _ => {
                ui::print_all_labels(&api);
            }
        },
        Some(("label", label_args)) => {
            let label: &String = label_args.get_one("label").unwrap();
            let task_id: &String = label_args.get_one("task_id").unwrap();
            let undo = label_args.get_flag("undo");

            if undo {
                api.label_task_remove(label, task_id.parse().unwrap());
            } else {
                api.label_task(label, task_id.parse().unwrap());
            }
        }
        Some(("new", new_task_arg)) => {
            let title: &String = new_task_arg.get_one("title").unwrap();
            let project: &String = new_task_arg.get_one("project").unwrap();
            let project = ProjectID::parse(&api, project).unwrap();
            let task = api.new_task(title.as_str(), &project);
            ui::task::print_task_info(task.id, &api);
        }
        Some(("done", done_args)) => {
            let task_id: &String = done_args.get_one("task_id").unwrap();
            let done = !done_args.get_flag("undo");
            api.done_task(task_id.parse().unwrap(), done);
            ui::task::print_task_info(task_id.parse().unwrap(), &api);
        }
        Some(("fav", fav_args)) => {
            let task_id: &String = fav_args.get_one("task_id").unwrap();
            let undo = fav_args.get_flag("undo");

            api.fav_task(task_id.parse().unwrap(), !undo);
            ui::task::print_task_info(task_id.parse().unwrap(), &api);
        }
        _ => {
            let done = arg.get_flag("done");
            let fav = arg.get_flag("favorite");
            let project: Option<&String> = arg.get_one("from");
            let label: Option<&String> = arg.get_one("label");
            ui::task::print_current_tasks(&api, done, fav, project, label);
        }
    }
}