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use std::any::Any;

use std::fmt::Debug;
use std::{error, fmt};

pub trait TGDatable: Debug {
    fn as_any(&self) -> &dyn Any;
}

#[derive(Debug)]
pub struct TGError {
    key: &'static str,
    message: Option<String>,
    data: Option<Box<dyn TGDatable>>,
    context: Option<Box<dyn std::error::Error>>,
}

pub type TGResult<T> = Result<T, TGError>;

impl TGError {
    pub fn new(key: &'static str) -> Self {
        Self {
            key,
            message: None,
            data: None,
            context: None,
        }
    }

    pub fn set_key(&mut self, key: &'static str) -> &mut Self {
        self.key = key;
        self
    }

    pub fn set_message<S: AsRef<str>>(&mut self, message: S) -> &mut Self {
        self.message = Some(message.as_ref().to_string());
        self
    }

    pub fn set_data(&mut self, data: Box<dyn TGDatable>) -> &mut Self {
        self.data = Some(data);
        self
    }

    pub fn set_context(&mut self, context: Box<dyn std::error::Error>) -> &mut Self {
        self.context = Some(context);
        self
    }

    pub fn key(&self) -> &'static str {
        self.key
    }
    pub fn message(&self) -> &Option<String> {
        &self.message
    }
    pub fn data(&self) -> &Option<Box<dyn TGDatable>> {
        &self.data
    }
    pub fn context(&self) -> &Option<Box<dyn std::error::Error>> {
        &self.context
    }
}

impl fmt::Display for TGError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(
            f,
            "[{}]: {}",
            self.key,
            self.message.clone().map_or("".to_string(), |v| v)
        )
    }
}

impl error::Error for TGError {
    fn description(&self) -> &str {
        self.key
    }

    fn cause(&self) -> Option<&dyn error::Error> {
        None
    }
}