use crate::cli::parser::NodeArgs;
use crate::cli::wrappers::resolve_backend;
use crate::commands::base::{Command, CommandContext};
use anyhow::Result;
use rudof_lib::formats::{BackendSpec, IriNormalizationMode};

/// Implementation of the `node` command.
///
/// This struct holds the specific arguments parsed by `clap` and
/// implements the [Command] trait to execute Node command logic.
pub struct NodeCommand {
    /// Arguments specific to Node command.
    args: NodeArgs,
}

impl NodeCommand {
    pub fn new(args: NodeArgs) -> Self {
        Self { args }
    }
}

impl Command for NodeCommand {
    /// Returns the unique identifier for this command.
    fn name(&self) -> &'static str {
        "node"
    }

    /// Executes the Node command logic.
    fn execute(&self, ctx: &mut CommandContext) -> Result<()> {
        let data_format = self.args.data_format.into();
        let reader_mode = self.args.reader_mode.into();
        let show_node_mode = self.args.show_node_mode.into();

        let backend = resolve_backend(&self.args.common);
        let has_data_source = !self.args.data.is_empty() || matches!(backend, BackendSpec::Endpoint(_));

        if has_data_source {
            let mut loading = ctx
                .rudof
                .load_data()
                .with_data_format(&data_format)
                .with_reader_mode(&reader_mode)
                .with_backend(backend);
            if !self.args.data.is_empty() {
                loading = loading.with_data(&self.args.data);
            }
            if let Some(base) = self.args.base.as_deref() {
                loading = loading.with_base(base);
            }
            loading.execute()?;
        }

        let iri_mode = if self.args.strict_iris {
            IriNormalizationMode::Strict
        } else {
            IriNormalizationMode::Lax
        };

        let mut showing_node_info = ctx
            .rudof
            .show_node_info(self.args.node.as_ref(), &mut ctx.writer)
            .with_show_node_mode(&show_node_mode)
            .with_depth(self.args.depth)
            .with_iri_mode(iri_mode);
        if let Some(predicates) = self.args.predicates.as_deref() {
            showing_node_info = showing_node_info.with_predicates(predicates);
        }
        if let Some(show_hyperlinks) = self.args.show_hyperlinks {
            showing_node_info = showing_node_info.with_show_hyperlinks(show_hyperlinks);
        }
        showing_node_info.execute()?;

        Ok(())
    }
}
