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use std::cmp::Ordering;

use async_trait::async_trait;
use bytes::Bytes;
use futures_util::{stream::BoxStream, StreamExt};
use wasm_pkg_common::{
    package::{PackageRef, Version},
    Error,
};

use crate::Release;

pub mod local;
pub mod oci;
pub mod warg;

#[derive(Clone, Debug, Eq)]
pub struct VersionInfo {
    pub version: Version,
    pub yanked: bool,
}

impl Ord for VersionInfo {
    fn cmp(&self, other: &Self) -> Ordering {
        self.version.cmp(&other.version)
    }
}

impl PartialOrd for VersionInfo {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.version.cmp(&other.version))
    }
}

impl PartialEq for VersionInfo {
    fn eq(&self, other: &Self) -> bool {
        self.version == other.version
    }
}

impl std::fmt::Display for VersionInfo {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{version}", version = self.version)
    }
}

#[async_trait]
pub trait PackageSource: Send {
    async fn list_all_versions(&mut self, package: &PackageRef) -> Result<Vec<VersionInfo>, Error>;

    async fn get_release(
        &mut self,
        package: &PackageRef,
        version: &Version,
    ) -> Result<Release, Error>;

    async fn stream_content_unvalidated(
        &mut self,
        package: &PackageRef,
        release: &Release,
    ) -> Result<BoxStream<Result<Bytes, Error>>, Error>;

    async fn stream_content(
        &mut self,
        package: &PackageRef,
        release: &Release,
    ) -> Result<BoxStream<Result<Bytes, Error>>, Error> {
        let stream = self.stream_content_unvalidated(package, release).await?;
        Ok(release.content_digest.validating_stream(stream).boxed())
    }
}