swayfmt 0.35.5

use crate::{
    comments::write_comments,
    config::items::ItemBraceStyle,
    formatter::*,
    utils::{
        map::byte_span::{ByteSpan, LeafSpans},
        CurlyBrace,
    },
};
use std::fmt::Write;
use sway_ast::{keywords::Token, token::Delimiter, ItemAbi};
use sway_types::Spanned;

impl Format for ItemAbi {
    fn format(
        &self,
        formatted_code: &mut FormattedCode,
        formatter: &mut Formatter,
    ) -> Result<(), FormatterError> {
        // `abi name`
        write!(formatted_code, "{} ", self.abi_token.span().as_str())?;
        self.name.format(formatted_code, formatter)?;

        // ` : super_trait + super_trait`
        if let Some((colon_token, traits)) = &self.super_traits {
            write!(formatted_code, " {} ", colon_token.ident().as_str())?;
            traits.format(formatted_code, formatter)?;
        }

        Self::open_curly_brace(formatted_code, formatter)?;

        let abi_items = self.abi_items.get();

        // add pre item comments
        let end = if let Some(first_abi_item) = abi_items.first() {
            let item = &first_abi_item.0;
            if let Some(first_attr) = item.attribute_list.first() {
                // if there are existing abi items, we want to write comments until before the first attr
                first_attr.span().start()
            } else {
                // otherwise, write until before the item
                item.value.span().start()
            }
        } else {
            // if there are no abi_items, write until closing brace
            self.span().end()
        };

        write_comments(formatted_code, self.name.span().end()..end, formatter)?;

        let mut prev_end = None;
        // abi_items
        for (annotated, semicolon) in self.abi_items.get().iter() {
            if let Some(end) = prev_end {
                write_comments(
                    formatted_code,
                    end..annotated.value.span().start(),
                    formatter,
                )?;
            }
            // add indent + format item
            write!(
                formatted_code,
                "{}",
                formatter.shape.indent.to_string(&formatter.config)?,
            )?;
            annotated.format(formatted_code, formatter)?;
            writeln!(
                formatted_code,
                "{}",
                semicolon.ident().as_str() // SemicolonToken
            )?;

            prev_end = Some(annotated.value.span().end());
        }

        let last_abi_item = abi_items.last();
        let start = if let Some(last_abi_item) = last_abi_item {
            // If there are ABI items and attributes:
            // we start from the hash token of the last attribute.
            if let Some(last_attr) = last_abi_item.0.attribute_list.last() {
                last_attr.span().start()
            }
            // If there are ABI items but no attributes:
            // we start from the last item.
            else {
                let span = match &last_abi_item.0.value {
                    sway_ast::ItemTraitItem::Fn(fn_decl) => fn_decl.span(),
                };
                span.end()
            }
        }
        // If there are no ABI items:
        // we write ALL comments in the span here.
        else {
            self.span().start()
        };

        write_comments(
            formatted_code,
            start..self.abi_items.span().end(),
            formatter,
        )?;
        Self::close_curly_brace(formatted_code, formatter)?;

        // abi_defs_opt
        if let Some(abi_defs) = self.abi_defs_opt.clone() {
            Self::open_curly_brace(formatted_code, formatter)?;
            for item in abi_defs.get().iter() {
                // add indent + format item
                write!(
                    formatted_code,
                    "{}",
                    formatter.shape.indent.to_string(&formatter.config)?,
                )?;
                item.format(formatted_code, formatter)?;
            }
            writeln!(formatted_code)?;

            Self::close_curly_brace(formatted_code, formatter)?;
        }

        Ok(())
    }
}

impl CurlyBrace for ItemAbi {
    fn open_curly_brace(
        line: &mut String,
        formatter: &mut Formatter,
    ) -> Result<(), FormatterError> {
        let brace_style = formatter.config.items.item_brace_style;
        formatter.shape.block_indent(&formatter.config);
        let open_brace = Delimiter::Brace.as_open_char();
        match brace_style {
            ItemBraceStyle::AlwaysNextLine => {
                // Add openning brace to the next line.
                write!(line, "\n{open_brace}\n")?;
            }
            _ => {
                // Add opening brace to the same line
                writeln!(line, " {open_brace}")?;
            }
        }

        Ok(())
    }
    fn close_curly_brace(
        line: &mut String,
        formatter: &mut Formatter,
    ) -> Result<(), FormatterError> {
        // If shape is becoming left-most alligned or - indent just have the defualt shape
        formatter.shape.block_unindent(&formatter.config);
        write!(
            line,
            "{}{}",
            formatter.shape.indent.to_string(&formatter.config)?,
            Delimiter::Brace.as_close_char()
        )?;

        Ok(())
    }
}

impl LeafSpans for ItemAbi {
    fn leaf_spans(&self) -> Vec<ByteSpan> {
        let mut collected_spans = vec![ByteSpan::from(self.abi_token.span())];
        collected_spans.push(ByteSpan::from(self.name.span()));
        collected_spans.append(&mut self.abi_items.leaf_spans());
        if let Some(abi_defs) = &self.abi_defs_opt {
            collected_spans.append(&mut abi_defs.leaf_spans());
        }
        collected_spans
    }
}