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use nu_engine::{command_prelude::*, get_full_help};

#[derive(Clone)]
pub struct Sys;

impl Command for Sys {
    fn name(&self) -> &str {
        "sys"
    }

    fn signature(&self) -> Signature {
        Signature::build("sys")
            .filter()
            .category(Category::System)
            .input_output_types(vec![(Type::Nothing, Type::record())])
    }

    fn usage(&self) -> &str {
        "View information about the system."
    }

    fn extra_usage(&self) -> &str {
        "You must use one of the following subcommands. Using this command as-is will only produce this help message."
    }

    fn run(
        &self,
        engine_state: &EngineState,
        stack: &mut Stack,
        call: &Call,
        _input: PipelineData,
    ) -> Result<PipelineData, ShellError> {
        Ok(Value::string(get_full_help(self, engine_state, stack), call.head).into_pipeline_data())
    }

    fn examples(&self) -> Vec<Example> {
        vec![Example {
            description: "Show info about the system",
            example: "sys",
            result: None,
        }]
    }
}