use std::path::Path;
use kdl_schema::Schema;
use knuffel::{ast::Document, span::LineSpan};
use miette::Diagnostic;
use thiserror::Error;
pub type DocumentAst = Document<LineSpan>;
pub trait ParseToDocumentAst {
    type Error;
    fn parse(self) -> Result<DocumentAst, Self::Error>;
}
impl ParseToDocumentAst for DocumentAst {
    type Error = std::convert::Infallible;
    fn parse(self) -> Result<DocumentAst, Self::Error> {
        Ok(self)
    }
}
impl ParseToDocumentAst for &str {
    type Error = knuffel::Error<LineSpan>;
    fn parse(self) -> Result<DocumentAst, Self::Error> {
        knuffel::parse_ast("<text input>", self)
    }
}
#[derive(Debug, Error, Diagnostic)]
pub enum IoOrParseError {
    #[error("could not read file: {0}")]
    IoError(#[from] std::io::Error),
    #[error("could not parse file: {0}")]
    ParseError(#[from] knuffel::Error<LineSpan>),
}
impl ParseToDocumentAst for &Path {
    type Error = IoOrParseError;
    fn parse(self) -> Result<DocumentAst, Self::Error> {
        let file_name = self.display().to_string();
        let file_contents = std::fs::read_to_string(self)?;
        let result = knuffel::parse_ast(&file_name, &file_contents)?;
        Ok(result)
    }
}
pub enum MatchError<ParseError> {
    ParseError(ParseError),
}
pub trait CheckExt {
    fn check_matches<D: ParseToDocumentAst>(document: D) -> Result<(), MatchError<D::Error>>;
}
impl CheckExt for Schema {
    fn check_matches<D: ParseToDocumentAst>(document: D) -> Result<(), MatchError<D::Error>> {
        todo!()
    }
}

knuffel = { version = "1.1.0", default_features = false, features = ["base64", "line-numbers"] }
miette = { version = "3.3.0", features = ["fancy"] }
thiserror = "1.0.30"
[dependencies.kdl-schema]
path = "../kdl-schema"
# git = "https://code.boringcactus.com/kdl-schema"

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]

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