use serde_json::{json, Value};

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

/// Export transcript to caption/text format via the Python sidecar.
#[tauri::command]
pub fn export_transcript(
    segments: Value,
    speakers: Value,
    format: String,
    output_path: String,
    title: Option<String>,
) -> Result<Value, 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 python_path_str = python_path.to_string_lossy().to_string();

    let manager = SidecarManager::new();
    manager.start(&python_path_str)?;

    let request_id = uuid::Uuid::new_v4().to_string();
    let msg = IPCMessage::new(
        &request_id,
        "export.start",
        json!({
            "segments": segments,
            "speakers": speakers,
            "format": format,
            "output_path": output_path,
            "title": title.unwrap_or_default(),
        }),
    );

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

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

    Ok(response.payload)
}