use serde::{Deserialize, Serialize};
use std::collections::HashMap;

#[derive(Debug, Deserialize, Serialize)]
pub struct RegisterAppRequest {
    pub app_name: String,
    pub script_path: String,
    pub working_directory: String,
    pub user: String,
    #[serde(default)]
    pub environment: HashMap<String, String>,
    #[serde(default = "default_restart_policy")]
    pub restart_policy: String,
    pub app_type: String,
    pub description: Option<String>,
    /// Ruta personalizada del ejecutable (node, npm, python). Si es None, se auto-detecta.
    #[serde(default)]
    pub custom_executable: Option<String>,
    /// Si true, usa 'npm start' en lugar de 'node script.js' (solo para NodeJs)
    #[serde(default)]
    pub use_npm_start: Option<bool>,
}

fn default_restart_policy() -> String {
    "always".to_string()
}

#[derive(Debug, Serialize)]
pub struct ApiResponse<T> {
    pub success: bool,
    pub data: Option<T>,
    pub error: Option<String>,
}

impl<T> ApiResponse<T> {
    pub fn success(data: T) -> Self {
        ApiResponse {
            success: true,
            data: Some(data),
            error: None,
        }
    }

    pub fn error(error: String) -> Self {
        ApiResponse {
            success: false,
            data: None,
            error: Some(error),
        }
    }
}

#[derive(Debug, Serialize)]
pub struct AppStatusResponse {
    pub name: String,
    pub status: String,
    pub pid: Option<i32>,
    pub cpu_usage: f32,
    pub memory_usage: String,
    pub systemd_status: String,
    pub last_updated: String,
}

#[derive(Debug, Serialize)]
pub struct AppListResponse {
    pub apps: Vec<String>,
    pub total: usize,
}

#[derive(Debug, Serialize)]
pub struct OperationResponse {
    pub app_name: String,
    pub operation: String,
    pub success: bool,
    pub message: String,
}

#[derive(Debug, Serialize)]
pub struct DetectedProcess {
    pub pid: i32,
    pub name: String,
    pub user: Option<String>,
    pub cpu_usage: f64,
    pub memory_mb: f64,
    pub process_type: String,
}

#[derive(Debug, Serialize)]
pub struct ProcessScanResponse {
    pub processes: Vec<DetectedProcess>,
    pub total: usize,
}

#[derive(Debug, Serialize)]
pub struct HealthResponse {
    pub status: String,
    pub config_loaded: bool,
    pub config_path: String,
    pub apps_count: usize,
    pub systemd_services: Vec<String>,
    pub version: String,
}