use serde_json::{json, Value};

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

/// Start transcription of an audio file via the Python sidecar.
#[tauri::command]
pub fn transcribe_file(
    file_path: String,
    model: Option<String>,
    device: Option<String>,
    language: Option<String>,
) -> Result<Value, String> {
    let manager = sidecar();
    manager.ensure_running()?;

    let request_id = uuid::Uuid::new_v4().to_string();
    let msg = IPCMessage::new(
        &request_id,
        "transcribe.start",
        json!({
            "file": file_path,
            "model": model.unwrap_or_else(|| "base".to_string()),
            "device": device.unwrap_or_else(|| "cpu".to_string()),
            "compute_type": "int8",
            "language": language,
        }),
    );

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

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

    Ok(response.payload)
}

/// Run the full transcription + diarization pipeline via the Python sidecar.
#[tauri::command]
pub fn run_pipeline(
    file_path: String,
    model: Option<String>,
    device: Option<String>,
    language: Option<String>,
    num_speakers: Option<u32>,
    min_speakers: Option<u32>,
    max_speakers: Option<u32>,
    skip_diarization: Option<bool>,
) -> Result<Value, String> {
    let manager = sidecar();
    manager.ensure_running()?;

    let request_id = uuid::Uuid::new_v4().to_string();
    let msg = IPCMessage::new(
        &request_id,
        "pipeline.start",
        json!({
            "file": file_path,
            "model": model.unwrap_or_else(|| "base".to_string()),
            "device": device.unwrap_or_else(|| "cpu".to_string()),
            "compute_type": "int8",
            "language": language,
            "num_speakers": num_speakers,
            "min_speakers": min_speakers,
            "max_speakers": max_speakers,
            "skip_diarization": skip_diarization.unwrap_or(false),
        }),
    );

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

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

    Ok(response.payload)
}