use alt_controller_image::compare::{Change, SemanticDifference, compare};
use alt_controller_image::manifest::{
    ArchiveMemberRecord, ArtifactManifest, FileRecord, InitrdRecord, PackageRecord, ServiceRecord,
};
use tempfile::tempdir;

fn baseline() -> ArtifactManifest {
    ArtifactManifest::new(
        vec![PackageRecord::new("kernel-image-rt", "1.0")],
        vec![FileRecord::file("etc/controller.conf", "aaa")],
        Some(InitrdRecord::new("boot/initrd-rt.img", "old-initrd")),
        vec![ServiceRecord::new("controller.service", true)],
        vec![ArchiveMemberRecord::new("etc/controller.conf", "file")],
    )
    .expect("valid baseline manifest")
}

#[test]
fn compares_added_removed_and_changed_semantic_records() {
    let left = baseline();
    let right = ArtifactManifest::new(
        vec![
            PackageRecord::new("kernel-image-rt", "2.0"),
            PackageRecord::new("controller-agent", "1.0"),
        ],
        vec![FileRecord::symlink("etc/controller.conf", "controller.conf.real")],
        Some(InitrdRecord::new("boot/initrd-rt.img", "new-initrd")),
        vec![ServiceRecord::new("controller.service", false)],
        vec![ArchiveMemberRecord::new("usr/bin/controller", "file")],
    )
    .expect("valid comparison manifest");

    let report = compare(&left, &right);

    assert_eq!(
        report.differences(),
        &[
            SemanticDifference::Package { name: "controller-agent".into(), change: Change::Added },
            SemanticDifference::Package { name: "kernel-image-rt".into(), change: Change::Changed },
            SemanticDifference::File { path: "etc/controller.conf".into(), change: Change::Changed },
            SemanticDifference::Initrd { change: Change::Changed },
            SemanticDifference::Service { name: "controller.service".into(), change: Change::Changed },
            SemanticDifference::ArchiveMember { path: "etc/controller.conf".into(), change: Change::Removed },
            SemanticDifference::ArchiveMember { path: "usr/bin/controller".into(), change: Change::Added },
        ]
    );
    assert!(report.render().contains("changed initrd"));
}

#[test]
fn reads_and_writes_a_toml_manifest_beside_an_artifact() {
    let fixture = tempdir().expect("temporary directory");
    let artifact = fixture.path().join("controller.tar");
    let manifest = baseline();

    let manifest_path = manifest.write_beside(&artifact).expect("write manifest");
    assert_eq!(manifest_path, fixture.path().join("artifact.manifest.toml"));
    assert_eq!(ArtifactManifest::load(&manifest_path).expect("load manifest"), manifest);
}

#[test]
fn rejects_duplicate_semantic_keys() {
    let error = ArtifactManifest::new(
        vec![PackageRecord::new("controller", "1"), PackageRecord::new("controller", "2")],
        vec![],
        None,
        vec![],
        vec![],
    )
    .expect_err("duplicate package names must fail");

    assert!(error.to_string().contains("duplicate package record"));
}