//! Library specific error messages.

use core::fmt;
use std::fmt::Display;

use serde::{Deserialize, Serialize};

/// All possible errors that can occur when interacting with mpv.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum ErrorCode {
    MpvError(String),
    JsonParseError(String),
    ConnectError(String),
    JsonContainsUnexptectedType,
    UnexpectedResult,
    UnexpectedValue,
    MissingValue,
    UnsupportedType,
    ValueDoesNotContainBool,
    ValueDoesNotContainF64,
    ValueDoesNotContainHashMap,
    ValueDoesNotContainPlaylist,
    ValueDoesNotContainString,
    ValueDoesNotContainUsize,
}

/// Any error that can occur when interacting with mpv.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct Error(pub ErrorCode);

impl Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        Display::fmt(&self.0, f)
    }
}

impl std::error::Error for Error {}

impl Display for ErrorCode {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            ErrorCode::ConnectError(ref msg) => f.write_str(&format!("ConnectError: {}", msg)),
            ErrorCode::JsonParseError(ref msg) => f.write_str(&format!("JsonParseError: {}", msg)),
            ErrorCode::MpvError(ref msg) => f.write_str(&format!("MpvError: {}", msg)),
            ErrorCode::JsonContainsUnexptectedType => {
                f.write_str("Mpv sent a value with an unexpected type")
            }
            ErrorCode::UnexpectedResult => f.write_str("Unexpected result received"),
            ErrorCode::UnexpectedValue => f.write_str("Unexpected value received"),
            ErrorCode::MissingValue => f.write_str("Missing value"),
            ErrorCode::UnsupportedType => f.write_str("Unsupported type received"),
            ErrorCode::ValueDoesNotContainBool => {
                f.write_str("The received value is not of type \'std::bool\'")
            }
            ErrorCode::ValueDoesNotContainF64 => {
                f.write_str("The received value is not of type \'std::f64\'")
            }
            ErrorCode::ValueDoesNotContainHashMap => {
                f.write_str("The received value is not of type \'std::collections::HashMap\'")
            }
            ErrorCode::ValueDoesNotContainPlaylist => {
                f.write_str("The received value is not of type \'mpvipc::Playlist\'")
            }
            ErrorCode::ValueDoesNotContainString => {
                f.write_str("The received value is not of type \'std::string::String\'")
            }
            ErrorCode::ValueDoesNotContainUsize => {
                f.write_str("The received value is not of type \'std::usize\'")
            }
        }
    }
}