use std::{borrow::Cow, io::Write, path::Path};

use brush_core::{ExecutionResult, builtins};
use clap::Parser;

/// Display the current working directory.
#[derive(Parser)]
pub(crate) struct PwdCommand {
	/// Print the physical directory without any symlinks.
	#[arg(short = 'P', overrides_with = "allow_symlinks")]
	physical: bool,

	/// Print $PWD if it names the current working directory.
	#[arg(short = 'L', overrides_with = "physical")]
	allow_symlinks: bool,
}

impl builtins::Command for PwdCommand {
	type Error = brush_core::Error;

	async fn execute<SE: brush_core::ShellExtensions>(
		&self,
		context: brush_core::ExecutionContext<'_, SE>,
	) -> Result<brush_core::ExecutionResult, Self::Error> {
		let mut cwd: Cow<'_, Path> = context.shell.working_dir().into();

		let should_canonicalize = self.physical
			|| context
				.shell
				.options()
				.do_not_resolve_symlinks_when_changing_dir;

		if should_canonicalize {
			cwd = cwd.canonicalize()?.into();
		}

		writeln!(context.stdout(), "{}", cwd.to_string_lossy())?;

		Ok(ExecutionResult::success())
	}
}