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use nu_engine::get_full_help;
use nu_protocol::{
    ast::Call,
    engine::{Command, EngineState, Stack},
    Category, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
};

#[derive(Clone)]
pub struct ConfigMeta;

impl Command for ConfigMeta {
    fn name(&self) -> &str {
        "config"
    }

    fn signature(&self) -> Signature {
        Signature::build(self.name())
            .category(Category::Env)
            .input_output_types(vec![(Type::Nothing, Type::String)])
    }

    fn usage(&self) -> &str {
        "Edit nushell configuration files."
    }

    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(
                &ConfigMeta.signature(),
                &ConfigMeta.examples(),
                engine_state,
                stack,
                self.is_parser_keyword(),
            ),
            call.head,
        )
        .into_pipeline_data())
    }

    fn search_terms(&self) -> Vec<&str> {
        vec!["options", "setup"]
    }
}