use clap::Parser;

use clap_complete::ArgValueCompleter;

use futures_util::SinkExt;

use tokio_stream::StreamExt;

use crate::{

    client::commands::{erroneous_server_response, print_authorization_owner_hint},

    core::{

        completion::mysql_user_completer,

        protocol::{

            ClientToServerMessageStream, ListUsersError, Request, Response,

            print_list_users_output_status, print_list_users_output_status_json,

            request_validation::ValidationError,

        },

        types::MySQLUser,

    },

};

#[derive(Parser, Debug, Clone)]

pub struct ShowUserArgs {

    /// The `MySQL` user(s) to show

    #[cfg_attr(not(feature = "suid-sgid-mode"), arg(add = ArgValueCompleter::new(mysql_user_completer)))]

    #[arg(num_args = 0.., value_name = "USER_NAME")]

    username: Vec<MySQLUser>,

    /// Print the information as JSON

    #[arg(short, long)]

    json: bool,

}

    let message = if args.username.is_empty() {

        Request::ListUsers(None)

    } else {

        Request::ListUsers(Some(args.username.clone()))

    };

    if let Err(err) = server_connection.send(message).await {

        server_connection.close().await.ok();

        anyhow::bail!(err);

    }

    let users = match server_connection.next().await {

        Some(Ok(Response::ListUsers(users))) => users,

        Some(Ok(Response::ListAllUsers(users))) => match users {

            Ok(users) => users

                .into_iter()

                .collect(),

            Err(err) => {

                server_connection.send(Request::Exit).await?;

                return Err(

                    anyhow::anyhow!(err.to_error_message()).context("Failed to list all users")

                );

            }

        },

        response => return erroneous_server_response(response),

    };

    if args.json {

        print_list_users_output_status_json(&users);

    } else {

        print_list_users_output_status(&users);

        if users.iter().any(|(_, res)| {

            matches!(

                res,

                Err(ListUsersError::ValidationError(

                    ValidationError::AuthorizationError(_)

                ))

            )

        }) {

            print_authorization_owner_hint(&mut server_connection).await?;

        }

    }

    server_connection.send(Request::Exit).await?;

    if users.values().any(std::result::Result::is_err) {

        std::process::exit(1);

    }

    Ok(())

}