//! ## SetupActivity
//!
//! `setup_activity` is the module which implements the Setup activity, which is the activity to
//! work on termscp configuration

/**
 * MIT License
 *
 * termscp - Copyright (c) 2021 Christian Visintin
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
// Locals
use super::SetupActivity;
// Ext
use crossterm::terminal::{disable_raw_mode, enable_raw_mode};
use std::env;

impl SetupActivity {
    /// ### save_config
    ///
    /// Save configuration
    pub(super) fn save_config(&mut self) -> Result<(), String> {
        match self.context.as_ref().unwrap().config_client.as_ref() {
            Some(cli) => match cli.write_config() {
                Ok(_) => Ok(()),
                Err(err) => Err(format!("Could not save configuration: {}", err)),
            },
            None => Ok(()),
        }
    }

    /// ### reset_config_changes
    ///
    /// Reset configuration changes; pratically read config from file, overwriting any change made
    /// since last write action
    pub(super) fn reset_config_changes(&mut self) -> Result<(), String> {
        match self.context.as_mut().unwrap().config_client.as_mut() {
            Some(cli) => match cli.read_config() {
                Ok(_) => Ok(()),
                Err(err) => Err(format!("Could not restore configuration: {}", err)),
            },
            None => Ok(()),
        }
    }

    /// ### delete_ssh_key
    ///
    /// Delete ssh key from config cli
    pub(super) fn delete_ssh_key(&mut self, host: &str, username: &str) -> Result<(), String> {
        match self.context.as_mut().unwrap().config_client.as_mut() {
            Some(cli) => match cli.del_ssh_key(host, username) {
                Ok(_) => Ok(()),
                Err(err) => Err(format!(
                    "Could not delete ssh key \"{}@{}\": {}",
                    host, username, err
                )),
            },
            None => Ok(()),
        }
    }

    /// ### edit_ssh_key
    ///
    /// Edit selected ssh key
    pub(super) fn edit_ssh_key(&mut self, idx: usize) -> Result<(), String> {
        match self.context.as_mut() {
            None => Ok(()),
            Some(ctx) => {
                // Set editor if config client exists
                if let Some(config_cli) = ctx.config_client.as_ref() {
                    env::set_var("EDITOR", config_cli.get_text_editor());
                }
                // Prepare terminal
                let _ = disable_raw_mode();
                // Leave alternate mode
                ctx.leave_alternate_screen();
                // Get result
                let result: Result<(), String> = match ctx.config_client.as_ref() {
                    Some(config_cli) => match config_cli.iter_ssh_keys().nth(idx) {
                        Some(key) => {
                            // Get key path
                            match config_cli.get_ssh_key(key) {
                                Ok(ssh_key) => match ssh_key {
                                    None => Ok(()),
                                    Some((_, _, key_path)) => {
                                        match edit::edit_file(key_path.as_path()) {
                                            Ok(_) => Ok(()),
                                            Err(err) => {
                                                Err(format!("Could not edit ssh key: {}", err))
                                            }
                                        }
                                    }
                                },
                                Err(err) => Err(format!("Could not read ssh key: {}", err)),
                            }
                        }
                        None => Ok(()),
                    },
                    None => Ok(()),
                };
                // Restore terminal
                // Clear screen
                ctx.clear_screen();
                // Enter alternate mode
                ctx.enter_alternate_screen();
                // Re-enable raw mode
                let _ = enable_raw_mode();
                // Return result
                result
            }
        }
    }

    /// ### add_ssh_key
    ///
    /// Add provided ssh key to config client
    pub(super) fn add_ssh_key(
        &mut self,
        host: &str,
        username: &str,
        rsa_key: &str,
    ) -> Result<(), String> {
        match self.context.as_mut().unwrap().config_client.as_mut() {
            Some(cli) => {
                // Add key to client
                match cli.add_ssh_key(host, username, rsa_key) {
                    Ok(_) => Ok(()),
                    Err(err) => Err(format!("Could not add SSH key: {}", err)),
                }
            }
            None => Ok(()),
        }
    }
}