use tauri::{AppHandle, State};
use tauri_plugin_store::StoreExt;

use crate::config::{ClaudeStartOptions, HikariConfig};
use crate::stats::UsageStats;
use crate::bridge_manager::SharedBridgeManager;
use crate::achievements::{load_achievements, get_achievement_info, AchievementUnlockedEvent};

const CONFIG_STORE_KEY: &str = "config";

#[tauri::command]
pub async fn start_claude(
    bridge_manager: State<'_, SharedBridgeManager>,
    conversation_id: String,
    options: ClaudeStartOptions,
) -> Result<(), String> {
    let mut manager = bridge_manager.lock();
    manager.start_claude(&conversation_id, options)
}

#[tauri::command]
pub async fn stop_claude(
    bridge_manager: State<'_, SharedBridgeManager>,
    conversation_id: String,
) -> Result<(), String> {
    let mut manager = bridge_manager.lock();
    manager.stop_claude(&conversation_id)
}

#[tauri::command]
pub async fn interrupt_claude(
    bridge_manager: State<'_, SharedBridgeManager>,
    conversation_id: String,
) -> Result<(), String> {
    let mut manager = bridge_manager.lock();
    manager.interrupt_claude(&conversation_id)
}

#[tauri::command]
pub async fn send_prompt(
    bridge_manager: State<'_, SharedBridgeManager>,
    conversation_id: String,
    message: String,
) -> Result<(), String> {
    let mut manager = bridge_manager.lock();
    manager.send_prompt(&conversation_id, message)
}

#[tauri::command]
pub async fn is_claude_running(
    bridge_manager: State<'_, SharedBridgeManager>,
    conversation_id: String,
) -> Result<bool, String> {
    let manager = bridge_manager.lock();
    Ok(manager.is_claude_running(&conversation_id))
}

#[tauri::command]
pub async fn get_working_directory(
    bridge_manager: State<'_, SharedBridgeManager>,
    conversation_id: String,
) -> Result<String, String> {
    let manager = bridge_manager.lock();
    manager.get_working_directory(&conversation_id)
}

#[tauri::command]
pub async fn select_wsl_directory() -> Result<String, String> {
    Ok("/home".to_string())
}

#[tauri::command]
pub async fn get_config(app: AppHandle) -> Result<HikariConfig, String> {
    let store = app
        .store("hikari-config.json")
        .map_err(|e| e.to_string())?;

    match store.get(CONFIG_STORE_KEY) {
        Some(value) => {
            serde_json::from_value(value.clone()).map_err(|e| e.to_string())
        }
        None => Ok(HikariConfig::default()),
    }
}

#[tauri::command]
pub async fn save_config(app: AppHandle, config: HikariConfig) -> Result<(), String> {
    let store = app
        .store("hikari-config.json")
        .map_err(|e| e.to_string())?;

    let value = serde_json::to_value(&config).map_err(|e| e.to_string())?;
    store.set(CONFIG_STORE_KEY, value);
    store.save().map_err(|e| e.to_string())?;

    Ok(())
}

#[tauri::command]
pub async fn get_usage_stats(
    bridge_manager: State<'_, SharedBridgeManager>,
    conversation_id: String,
) -> Result<UsageStats, String> {
    let manager = bridge_manager.lock();
    manager.get_usage_stats(&conversation_id)
}

#[tauri::command]
pub async fn validate_directory(path: String, current_dir: Option<String>) -> Result<String, String> {
    use std::path::Path;

    let path = Path::new(&path);

    // Expand ~ to home directory
    let expanded_path = if path.starts_with("~") {
        if let Some(home) = std::env::var_os("HOME") {
            let home_path = Path::new(&home);
            if path == Path::new("~") {
                home_path.to_path_buf()
            } else {
                home_path.join(path.strip_prefix("~").unwrap())
            }
        } else {
            return Err("Could not determine home directory".to_string());
        }
    } else if path.is_relative() {
        // Handle relative paths (., .., or any relative path) by resolving against current_dir
        if let Some(ref cwd) = current_dir {
            Path::new(cwd).join(path)
        } else {
            path.to_path_buf()
        }
    } else {
        path.to_path_buf()
    };

    // Check if the path exists and is a directory
    if !expanded_path.exists() {
        return Err(format!("Directory does not exist: {}", expanded_path.display()));
    }

    if !expanded_path.is_dir() {
        return Err(format!("Path is not a directory: {}", expanded_path.display()));
    }

    // Return the canonicalized (absolute) path
    expanded_path
        .canonicalize()
        .map(|p| p.to_string_lossy().to_string())
        .map_err(|e| format!("Failed to resolve path: {}", e))
}

#[tauri::command]
pub async fn load_saved_achievements(app: AppHandle) -> Result<Vec<AchievementUnlockedEvent>, String> {
    use chrono::Utc;

    // Load achievements from persistent store
    let progress = load_achievements(&app).await;

    // Create events for all previously unlocked achievements
    let mut events = Vec::new();
    for achievement_id in &progress.unlocked {
        let mut info = get_achievement_info(achievement_id);
        info.unlocked_at = Some(Utc::now()); // We don't store timestamps, so just use now
        events.push(AchievementUnlockedEvent {
            achievement: info,
        });
    }

    Ok(events)
}