use std::{error::Error, fmt::Display};

use crate::presentations::PresKind;

#[derive(Debug, Clone, Default, PartialEq, Eq)]
pub enum ServiceItemKind {
    #[default]
    Song,
    Video,
    Image,
    Presentation(PresKind),
    Content,
}

impl std::fmt::Display for ServiceItemKind {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        let s = match self {
            Self::Song => "song".to_owned(),
            Self::Image => "image".to_owned(),
            Self::Video => "video".to_owned(),
            Self::Presentation(PresKind::Html) => "html".to_owned(),
            Self::Presentation(PresKind::Pdf) => "pdf".to_owned(),
            Self::Presentation(PresKind::Generic) => {
                "presentation".to_owned()
            }
            Self::Content => "content".to_owned(),
        };
        write!(f, "{s}")
    }
}

impl TryFrom<String> for ServiceItemKind {
    type Error = ParseError;
    fn try_from(value: String) -> Result<Self, Self::Error> {
        match value.as_str() {
            "song" => Ok(Self::Song),
            "image" => Ok(Self::Image),
            "video" => Ok(Self::Video),
            "presentation" => {
                Ok(Self::Presentation(PresKind::Generic))
            }
            "html" => Ok(Self::Presentation(PresKind::Html)),
            "pdf" => Ok(Self::Presentation(PresKind::Pdf)),
            "content" => Ok(Self::Content),
            _ => Err(ParseError::UnknownType),
        }
    }
}

impl From<ServiceItemKind> for String {
    fn from(val: ServiceItemKind) -> String {
        match val {
            ServiceItemKind::Song => "song".to_owned(),
            ServiceItemKind::Video => "video".to_owned(),
            ServiceItemKind::Image => "image".to_owned(),
            ServiceItemKind::Presentation(_) => "presentation".to_owned(),
            ServiceItemKind::Content => "content".to_owned(),
        }
    }
}

#[derive(Debug)]
pub enum ParseError {
    UnknownType,
}

impl Error for ParseError {}

impl Display for ParseError {
    fn fmt(
        &self,
        f: &mut std::fmt::Formatter<'_>,
    ) -> std::fmt::Result {
        let message = match self {
            Self::UnknownType => "The type does not exist. It needs to be one of 'song', 'video', 'image', 'presentation', or 'content'",
        };
        write!(f, "Error: {message}")
    }
}

#[cfg(test)]
mod test {
    #[test]
    pub fn test_kinds() {
        assert_eq!(true, true)
    }
}