use std::path::Path;
use std::process::Command;

use crate::error::{PinakesError, Result};

pub trait Opener: Send + Sync {
    fn open(&self, path: &Path) -> Result<()>;
}

/// Linux opener using xdg-open
pub struct XdgOpener;

impl Opener for XdgOpener {
    fn open(&self, path: &Path) -> Result<()> {
        let status = Command::new("xdg-open")
            .arg(path)
            .status()
            .map_err(|e| PinakesError::InvalidOperation(format!("failed to run xdg-open: {e}")))?;
        if status.success() {
            Ok(())
        } else {
            Err(PinakesError::InvalidOperation(format!(
                "xdg-open exited with status {status}"
            )))
        }
    }
}

/// macOS opener using the `open` command
pub struct MacOpener;

impl Opener for MacOpener {
    fn open(&self, path: &Path) -> Result<()> {
        let status = Command::new("open")
            .arg(path)
            .status()
            .map_err(|e| PinakesError::InvalidOperation(format!("failed to run open: {e}")))?;
        if status.success() {
            Ok(())
        } else {
            Err(PinakesError::InvalidOperation(format!(
                "open exited with status {status}"
            )))
        }
    }
}

/// Windows opener using `cmd /c start`
pub struct WindowsOpener;

impl Opener for WindowsOpener {
    fn open(&self, path: &Path) -> Result<()> {
        let status = Command::new("cmd")
            .args(["/C", "start", ""])
            .arg(path)
            .status()
            .map_err(|e| {
                PinakesError::InvalidOperation(format!("failed to run cmd /c start: {e}"))
            })?;
        if status.success() {
            Ok(())
        } else {
            Err(PinakesError::InvalidOperation(format!(
                "cmd /c start exited with status {status}"
            )))
        }
    }
}

/// Returns the platform-appropriate opener.
pub fn default_opener() -> Box<dyn Opener> {
    if cfg!(target_os = "macos") {
        Box::new(MacOpener)
    } else if cfg!(target_os = "windows") {
        Box::new(WindowsOpener)
    } else {
        Box::new(XdgOpener)
    }
}