use anyhow::{Result, bail};
use turbo_rcstr::RcStr;
use turbo_tasks::{ReadRef, Vc};
use turbo_tasks_fs::FileSystemPath;
use turbo_tasks_hash::{Xxh3Hash64Hasher, encode_hex};
use turbopack_core::{chunk::MinifyType, version::Version};
use turbopack_ecmascript::chunk::{CodeAndIds, EcmascriptChunkContent};

#[turbo_tasks::value(serialization = "none")]
pub(super) struct EcmascriptBuildNodeChunkVersion {
    chunk_path: String,
    chunk_items: Vec<ReadRef<CodeAndIds>>,
    minify_type: MinifyType,
}

#[turbo_tasks::value_impl]
impl EcmascriptBuildNodeChunkVersion {
    #[turbo_tasks::function]
    pub async fn new(
        output_root: FileSystemPath,
        chunk_path: FileSystemPath,
        content: Vc<EcmascriptChunkContent>,
        minify_type: MinifyType,
    ) -> Result<Vc<Self>> {
        let output_root = output_root.clone();
        let chunk_path = chunk_path.clone();
        let chunk_path = if let Some(path) = output_root.get_path_to(&chunk_path) {
            path
        } else {
            bail!(
                "chunk path {} is not in client root {}",
                chunk_path.to_string(),
                output_root.to_string()
            );
        };
        let chunk_items = content.await?.chunk_item_code_and_ids().await?;
        Ok(EcmascriptBuildNodeChunkVersion {
            chunk_path: chunk_path.to_string(),
            chunk_items,
            minify_type,
        }
        .cell())
    }
}

#[turbo_tasks::value_impl]
impl Version for EcmascriptBuildNodeChunkVersion {
    #[turbo_tasks::function]
    fn id(&self) -> Vc<RcStr> {
        let mut hasher = Xxh3Hash64Hasher::new();
        hasher.write_ref(&self.chunk_path);
        hasher.write_ref(&self.minify_type);
        hasher.write_value(self.chunk_items.len());
        for item in &self.chunk_items {
            for (module_id, code) in item {
                hasher.write_value((module_id, code.source_code()));
            }
        }
        let hash = hasher.finish();
        let hex_hash = encode_hex(hash);
        Vc::cell(hex_hash.into())
    }
}