use anyhow::Result;
use std::io::{self, Write};
use tokio::sync::mpsc;

use crate::client::AtProtoClient;
use crate::jetstream;
use crate::tui;

pub async fn run_interactive_mode(client: &AtProtoClient, use_tui: bool) -> Result<()> {
    if use_tui {
        run_tui_mode(client).await
    } else {
        run_simple_repl(client).await
    }
}

async fn run_tui_mode(client: &AtProtoClient) -> Result<()> {
    // Create channel for messages from jetstream to TUI
    let (message_tx, message_rx) = mpsc::unbounded_channel();

    // Get user's DID to filter out our own messages
    let own_did = client.get_user_did();

    // Start jetstream listener in background
    let jetstream_tx = message_tx.clone();
    tokio::spawn(async move {
        if let Err(e) = jetstream::start_jetstream_listener(jetstream_tx, own_did).await {
            eprintln!("Jetstream listener error: {}", e);
        }
    });

    // Run the TUI
    tui::run_tui(client, message_rx).await
}

async fn run_simple_repl(client: &AtProtoClient) -> Result<()> {
    println!("Entering interactive mode. Type /help for commands.");
    println!("Enter your thoughts line by line, or use commands starting with '/'");
    println!();
    
    loop {
        print!("> ");
        io::stdout().flush()?;
        
        let mut input = String::new();
        io::stdin().read_line(&mut input)?;
        
        let input = input.trim();
        
        // Skip empty lines
        if input.is_empty() {
            continue;
        }
        
        // Handle commands
        if input.starts_with('/') {
            match input {
                "/exit" | "/quit" => {
                    println!("Goodbye!");
                    break;
                }
                "/help" => {
                    show_help();
                    continue;
                }
                _ => {
                    println!("Unknown command: {}. Type /help for available commands.", input);
                    continue;
                }
            }
        }
        
        // Publish the blip
        match client.publish_blip(input).await {
            Ok(uri) => {
                println!("✅ Published: {}", uri);
            }
            Err(e) => {
                println!("❌ Failed to publish: {}", e);
            }
        }
    }
    
    Ok(())
}

fn show_help() {
    println!("Interactive mode commands:");
    println!("  /help           - Show this help message");
    println!("  /exit, /quit    - Exit interactive mode");
    println!();
    println!("Just type your message and press Enter to publish a blip.");
}