use serde_json::{json, Value};

use crate::sidecar::messages::IPCMessage;
use crate::sidecar::SidecarManager;

fn get_sidecar() -> Result<SidecarManager, String> {
    let python_path = std::env::current_dir()
        .map_err(|e| e.to_string())?
        .join("../python")
        .canonicalize()
        .map_err(|e| format!("Cannot find python directory: {e}"))?;

    let manager = SidecarManager::new();
    manager.start(&python_path.to_string_lossy())?;
    Ok(manager)
}

/// Send a chat message to the AI provider via the Python sidecar.
#[tauri::command]
pub fn ai_chat(
    messages: Value,
    transcript_context: Option<String>,
    provider: Option<String>,
) -> Result<Value, String> {
    let manager = get_sidecar()?;

    let request_id = uuid::Uuid::new_v4().to_string();
    let mut payload = json!({
        "action": "chat",
        "messages": messages,
        "transcript_context": transcript_context.unwrap_or_default(),
    });

    // If a specific provider is requested, set it first
    if let Some(p) = provider {
        let set_msg = IPCMessage::new(
            &uuid::Uuid::new_v4().to_string(),
            "ai.chat",
            json!({ "action": "set_provider", "provider": p }),
        );
        let _ = manager.send_and_receive(&set_msg)?;
    }

    let msg = IPCMessage::new(&request_id, "ai.chat", payload);
    let response = manager.send_and_receive(&msg)?;

    if response.msg_type == "error" {
        return Err(format!(
            "AI error: {}",
            response.payload.get("message").and_then(|v| v.as_str()).unwrap_or("unknown")
        ));
    }

    Ok(response.payload)
}

/// List available AI providers.
#[tauri::command]
pub fn ai_list_providers() -> Result<Value, String> {
    let manager = get_sidecar()?;

    let request_id = uuid::Uuid::new_v4().to_string();
    let msg = IPCMessage::new(
        &request_id,
        "ai.chat",
        json!({ "action": "list_providers" }),
    );

    let response = manager.send_and_receive(&msg)?;
    Ok(response.payload)
}

/// Configure an AI provider with API key/settings.
#[tauri::command]
pub fn ai_configure(provider: String, config: Value) -> Result<Value, String> {
    let manager = get_sidecar()?;

    let request_id = uuid::Uuid::new_v4().to_string();
    let msg = IPCMessage::new(
        &request_id,
        "ai.chat",
        json!({
            "action": "configure",
            "provider": provider,
            "config": config,
        }),
    );

    let response = manager.send_and_receive(&msg)?;
    Ok(response.payload)
}