//! `branches [pattern] [repo]` — list branches, optionally filtered.

use anyhow::Result;
use clap::Args as ClapArgs;
use serde_json::Value;

use crate::client::Client;

#[derive(ClapArgs)]
pub struct Args {
    /// Substring pattern to filter branch names.
    pattern: Option<String>,
}

pub fn run(client: &Client, args: Args) -> Result<()> {
    let repo = client.repo();
    let v = client.get_json(&format!("/repos/{repo}/branches?limit=100"))?;
    let names: Vec<&str> = v
        .as_array()
        .map(|a| {
            a.iter()
                .filter_map(|b| b.get("name").and_then(Value::as_str))
                .collect()
        })
        .unwrap_or_default();
    for n in names {
        if args.pattern.as_deref().is_none_or(|p| n.contains(p)) {
            println!("{n}");
        }
    }
    Ok(())
}