use std::collections::HashMap;
use crate::error::LkError;
use crate::frontend;
use crate::host::*;
use crate::module::connection::ResponseMessage;
use crate::module::*;
use crate::module::command::*;
use crate::utils::ShellCommand;
use crate::enums;
use lightkeeper_module::command_module;

#[command_module(
    name="docker-compose-shell",
    version="0.0.1",
    description="Opens a shell inside a Docker compose managed container.",
)]
pub struct Shell;

impl Module for Shell {
    fn new(_settings: &HashMap<String, String>) -> Self {
        Shell { }
    }
}

impl CommandModule for Shell {
    fn get_connector_spec(&self) -> Option<ModuleSpecification> {
        Some(ModuleSpecification::connector("ssh", "0.0.1"))
    }

    fn get_display_options(&self) -> frontend::DisplayOptions {
        frontend::DisplayOptions {
            category: String::from("docker-compose"),
            parent_id: String::from("docker-compose"),
            display_style: frontend::DisplayStyle::Icon,
            display_icon: String::from("terminal"),
            display_text: String::from("Open shell inside"),
            depends_on_criticality: vec![enums::Criticality::Normal],
            action: UIAction::Terminal,
            tab_title: String::from("Docker shell"),
            multivalue_level: 2,
            ..Default::default()
        }
    }

    fn get_connector_message(&self, host: Host, parameters: Vec<String>) -> Result<String, LkError> {
        let compose_file = parameters.first().unwrap();
        let service = parameters.get(2).unwrap();

        let mut command = ShellCommand::new();
        command.use_sudo = host.settings.contains(&crate::host::HostSetting::UseSudo);

        if host.platform.is_same_or_greater(platform_info::Flavor::Debian, "8") ||
           host.platform.is_same_or_greater(platform_info::Flavor::Ubuntu, "20") ||
           host.platform.is_same_or_greater(platform_info::Flavor::NixOS, "20") ||
           host.platform.is_same_or_greater(platform_info::Flavor::RedHat, "8") ||
           host.platform.is_same_or_greater(platform_info::Flavor::CentOS, "8") {

            command.arguments(vec!["docker", "compose", "-f", compose_file, "exec", service,
                                   "/bin/sh", "-c", "test -e /bin/bash && /bin/bash || /bin/sh"]);
        }
        else {
            return Err(LkError::unsupported_platform())
        }

        Ok(command.to_string())
    }

    fn process_response(&self, _host: Host, response: &ResponseMessage) -> Result<CommandResult, String> {
        Ok(CommandResult::new_info(response.message.clone()))
    }
}