use anyhow::{Context, Result};
use arboard::Clipboard;
use enigo::{Direction, Enigo, Key, Keyboard, Settings};
use std::thread;
use std::time::Duration;
use tracing::{debug, info};

use crate::config::PasteMethod;

/// Paste text using the configured method.
pub fn paste_text(text: &str, method: &PasteMethod, keep_on_clipboard: bool) -> Result<()> {
    let mut clipboard = Clipboard::new().context("Failed to open clipboard")?;

    // Save current clipboard content if we need to restore it
    let previous = if !keep_on_clipboard {
        clipboard.get_text().ok()
    } else {
        None
    };

    // Set text to clipboard
    clipboard
        .set_text(text.to_string())
        .context("Failed to set clipboard text")?;
    debug!("Text set to clipboard ({} chars)", text.len());

    if *method == PasteMethod::ClipboardOnly {
        info!("Text copied to clipboard (clipboard_only mode)");
        return Ok(());
    }

    // Small delay to ensure clipboard is ready
    thread::sleep(Duration::from_millis(50));

    // Simulate paste keystroke
    let mut enigo = Enigo::new(&Settings::default()).context("Failed to create enigo instance")?;

    match method {
        PasteMethod::CtrlV => {
            debug!("Pasting via Ctrl+V");
            enigo.key(Key::Control, Direction::Press)?;
            enigo.key(Key::Unicode('v'), Direction::Click)?;
            enigo.key(Key::Control, Direction::Release)?;
        }
        PasteMethod::ShiftInsert => {
            debug!("Pasting via Shift+Insert");
            enigo.key(Key::Shift, Direction::Press)?;
            enigo.key(Key::Other(0x2D), Direction::Click)?; // VK_INSERT on Windows
            enigo.key(Key::Shift, Direction::Release)?;
        }
        PasteMethod::CtrlShiftV => {
            debug!("Pasting via Ctrl+Shift+V");
            enigo.key(Key::Control, Direction::Press)?;
            enigo.key(Key::Shift, Direction::Press)?;
            enigo.key(Key::Unicode('v'), Direction::Click)?;
            enigo.key(Key::Shift, Direction::Release)?;
            enigo.key(Key::Control, Direction::Release)?;
        }
        PasteMethod::ClipboardOnly => unreachable!(),
    }

    // Restore previous clipboard content if needed
    if let Some(prev) = previous {
        thread::sleep(Duration::from_millis(100));
        let _ = clipboard.set_text(prev);
        debug!("Previous clipboard content restored");
    }

    info!("Text pasted ({} chars)", text.len());
    Ok(())
}