use std::borrow::Cow;

use crate::compare::Token;
use crate::wasm::WasmDocument;

pub fn wasm_compare_document<'b, 's>(
    emacs: &'b Token<'s>,
    wasm: &'b WasmDocument<'s>,
) -> Result<WasmDiffEntry<'b, 's>, Box<dyn std::error::Error>> {
    todo!()
}

#[derive(Debug)]
pub enum WasmDiffEntry<'b, 's> {
    WasmDiffResult(WasmDiffResult<'b, 's>),
    WasmDiffLayer(WasmDiffLayer<'b, 's>),
}

#[derive(Debug)]
pub struct WasmDiffResult<'b, 's> {
    status: WasmDiffStatus,
    name: Cow<'s, str>,
    message: Option<String>,
    children: Vec<WasmDiffEntry<'b, 's>>,
    rust_source: &'s str,
    #[allow(dead_code)]
    emacs_token: &'b Token<'s>,
}

#[derive(Debug)]
pub(crate) enum WasmDiffStatus {
    Good,
    Bad,
}

#[derive(Debug)]
pub struct WasmDiffLayer<'b, 's> {
    name: Cow<'s, str>,
    children: Vec<WasmDiffEntry<'b, 's>>,
}

impl<'b, 's> WasmDiffEntry<'b, 's> {
    // fn has_bad_children(&self) -> bool {
    //     match self {
    //         DiffEntry::DiffResult(diff) => &diff.children,
    //         DiffEntry::DiffLayer(diff) => &diff.children,
    //     }
    //     .iter()
    //     .any(|child| child.is_immediately_bad() || child.has_bad_children())
    // }

    // fn is_immediately_bad(&self) -> bool {
    //     match self {
    //         DiffEntry::DiffResult(diff) => matches!(diff.status, DiffStatus::Bad),
    //         DiffEntry::DiffLayer(_) => false,
    //     }
    // }

    pub fn is_bad(&self) -> bool {
        todo!()
        // self.is_immediately_bad() || self.has_bad_children()
    }

    pub fn print(&self, original_document: &str) -> Result<(), Box<dyn std::error::Error>> {
        self.print_indented(0, original_document)
    }

    fn print_indented(
        &self,
        indentation: usize,
        original_document: &str,
    ) -> Result<(), Box<dyn std::error::Error>> {
        todo!()
        // match self {
        //     WasmDiffEntry::WasmDiffResult(diff) => {
        //         diff.print_indented(indentation, original_document)
        //     }
        //     WasmDiffEntry::WasmDiffLayer(diff) => {
        //         diff.print_indented(indentation, original_document)
        //     }
        // }
    }
}