pub const INFO: usize = 0;
pub const DEBUG: usize = 1;
pub const WARNING: usize = 2;
pub const ERROR: usize = 3;
pub const FATAL: usize = 4;

pub const LOG_LEVEL: [&str; 5] = [
    "INFO",
    "DEBUG",
    "WARNING",
    "ERROR",
    "FATAL",
];

use chrono::Utc;

pub fn colored(text: &str, color: &str) -> String {
    // For terminals: use ANSI escape codes
    let ansi_code = match color {
        "black"  => "30",
        "red"    => "31",
        "green"  => "32",
        "yellow" => "33",
        "blue"   => "34",
        "purple" => "35",
        "cyan"   => "36",
        "white"  => "37",
        _        => "0", // default no color
    };
    format!("\x1b[{ansi_code}m{text}\x1b[0m")
}

pub fn current_timestamp() -> String {
    Utc::now().format("%Y-%m-%d@%H:%M:%S").to_string()
}

/// You can use this macro to create error messages that will show in the console
/// if run on the client or in the terminal if run on the server
///
/// log_levels are :
///     - INFO
///     - DEBUG
///     - WARNING
///     - ERROR
///     - FATAL
///
/// important: FATAL will cause the thread to panic and stop execution
#[macro_export]
macro_rules! log {
    ($level:expr, $($arg:tt)*) => {{
        let formatted_msg = format!($($arg)*);
        match $level {
            $crate::log::INFO => {
                println!(
                    "[{}] {} | {}",
                    $crate::log::colored($crate::log::LOG_LEVEL[$level], "green"),
                    $crate::log::current_timestamp(),
                    formatted_msg
                );
            },
            $crate::log::DEBUG => {
                println!(
                    "[{}] [{}:{}] {} | {}",
                    $crate::log::LOG_LEVEL[$level],
                    file!(),
                    line!(),
                    $crate::log::current_timestamp(),
                    formatted_msg
                );
            },
            $crate::log::WARNING => {
                println!(
                    "[{}] [{}:{}] {} | {}",
                    $crate::log::colored($crate::log::LOG_LEVEL[$level], "yellow"),
                    file!(),
                    line!(),
                    $crate::log::current_timestamp(),
                    formatted_msg
                );
            },
            $crate::log::ERROR => {
                println!(
                    "[{}] [{}:{}] {} | {}",
                    $crate::log::colored($crate::log::LOG_LEVEL[$level], "red"),
                    file!(),
                    line!(),
                    $crate::log::current_timestamp(),
                    formatted_msg
                );
            },
            $crate::log::FATAL => {
                println!(
                    "[{}] [{}:{}] {} | {}",
                    $crate::log::colored($crate::log::LOG_LEVEL[$level], "red"),
                    file!(),
                    line!(),
                    $crate::log::current_timestamp(),
                    formatted_msg
                );
                if $level == $crate::log::FATAL {
                    panic!("Fatal error encountered: {}", formatted_msg);
                }
            },
            _ => {
                println!(
                    "[{}] {} {}",
                    $crate::log::LOG_LEVEL[$crate::log::ERROR],
                    "loggin error: log_level value invalid:",
                    $level
                );
            }
        }
    }};
}